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Ingo Molnar0a02ad92009-09-11 12:12:54 +02001#include "builtin.h"
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +02002#include "perf.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +02003
4#include "util/util.h"
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02005#include "util/evlist.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +02006#include "util/cache.h"
Arnaldo Carvalho de Meloe3f42602011-11-16 17:02:54 -02007#include "util/evsel.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +02008#include "util/symbol.h"
9#include "util/thread.h"
10#include "util/header.h"
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -020011#include "util/session.h"
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -020012#include "util/tool.h"
Yann Droneaud57480d22014-06-30 22:28:47 +020013#include "util/cloexec.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +020014
15#include "util/parse-options.h"
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020016#include "util/trace-event.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +020017
Ingo Molnar0a02ad92009-09-11 12:12:54 +020018#include "util/debug.h"
19
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020020#include <sys/prctl.h>
Markus Trippelsdorf7b78f132012-04-04 10:45:27 +020021#include <sys/resource.h>
Ingo Molnar0a02ad92009-09-11 12:12:54 +020022
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020023#include <semaphore.h>
24#include <pthread.h>
25#include <math.h>
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +020026
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020027#define PR_SET_NAME 15 /* Set process name */
28#define MAX_CPUS 4096
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020029#define COMM_LEN 20
30#define SYM_LEN 129
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020031#define MAX_PID 65536
Ingo Molnarec156762009-09-11 12:12:54 +020032
mingo39aeb522009-09-14 20:04:48 +020033struct sched_atom;
Ingo Molnarec156762009-09-11 12:12:54 +020034
35struct task_desc {
36 unsigned long nr;
37 unsigned long pid;
38 char comm[COMM_LEN];
39
40 unsigned long nr_events;
41 unsigned long curr_event;
mingo39aeb522009-09-14 20:04:48 +020042 struct sched_atom **atoms;
Ingo Molnarec156762009-09-11 12:12:54 +020043
44 pthread_t thread;
45 sem_t sleep_sem;
46
47 sem_t ready_for_work;
48 sem_t work_done_sem;
49
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020050 u64 cpu_usage;
Ingo Molnarec156762009-09-11 12:12:54 +020051};
52
53enum sched_event_type {
54 SCHED_EVENT_RUN,
55 SCHED_EVENT_SLEEP,
56 SCHED_EVENT_WAKEUP,
Mike Galbraith55ffb7a2009-10-10 14:46:04 +020057 SCHED_EVENT_MIGRATION,
Ingo Molnarec156762009-09-11 12:12:54 +020058};
59
mingo39aeb522009-09-14 20:04:48 +020060struct sched_atom {
Ingo Molnarec156762009-09-11 12:12:54 +020061 enum sched_event_type type;
Arnaldo Carvalho de Meloeed05fe2010-04-05 12:53:45 -030062 int specific_wait;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020063 u64 timestamp;
64 u64 duration;
Ingo Molnarec156762009-09-11 12:12:54 +020065 unsigned long nr;
Ingo Molnarec156762009-09-11 12:12:54 +020066 sem_t *wait_sem;
67 struct task_desc *wakee;
68};
69
Dongshenge936e8e2014-05-05 16:05:54 +090070#define TASK_STATE_TO_CHAR_STR "RSDTtZXxKWP"
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020071
72enum thread_state {
73 THREAD_SLEEPING = 0,
74 THREAD_WAIT_CPU,
75 THREAD_SCHED_IN,
76 THREAD_IGNORE
77};
78
79struct work_atom {
80 struct list_head list;
81 enum thread_state state;
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +020082 u64 sched_out_time;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020083 u64 wake_up_time;
84 u64 sched_in_time;
85 u64 runtime;
86};
87
mingo39aeb522009-09-14 20:04:48 +020088struct work_atoms {
89 struct list_head work_list;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020090 struct thread *thread;
91 struct rb_node node;
92 u64 max_lat;
Frederic Weisbecker3786310a2009-12-09 21:40:08 +010093 u64 max_lat_at;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020094 u64 total_lat;
95 u64 nb_atoms;
96 u64 total_runtime;
97};
98
mingo39aeb522009-09-14 20:04:48 +020099typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200100
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300101struct perf_sched;
102
103struct trace_sched_handler {
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300104 int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel,
105 struct perf_sample *sample, struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300106
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300107 int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel,
108 struct perf_sample *sample, struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300109
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300110 int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel,
111 struct perf_sample *sample, struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300112
David Aherncb627502013-08-07 22:50:47 -0400113 /* PERF_RECORD_FORK event, not sched_process_fork tracepoint */
114 int (*fork_event)(struct perf_sched *sched, union perf_event *event,
115 struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300116
117 int (*migrate_task_event)(struct perf_sched *sched,
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300118 struct perf_evsel *evsel,
119 struct perf_sample *sample,
120 struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300121};
122
123struct perf_sched {
124 struct perf_tool tool;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300125 const char *sort_order;
126 unsigned long nr_tasks;
127 struct task_desc *pid_to_task[MAX_PID];
128 struct task_desc **tasks;
129 const struct trace_sched_handler *tp_handler;
130 pthread_mutex_t start_work_mutex;
131 pthread_mutex_t work_done_wait_mutex;
132 int profile_cpu;
133/*
134 * Track the current task - that way we can know whether there's any
135 * weird events, such as a task being switched away that is not current.
136 */
137 int max_cpu;
138 u32 curr_pid[MAX_CPUS];
139 struct thread *curr_thread[MAX_CPUS];
140 char next_shortname1;
141 char next_shortname2;
142 unsigned int replay_repeat;
143 unsigned long nr_run_events;
144 unsigned long nr_sleep_events;
145 unsigned long nr_wakeup_events;
146 unsigned long nr_sleep_corrections;
147 unsigned long nr_run_events_optimized;
148 unsigned long targetless_wakeups;
149 unsigned long multitarget_wakeups;
150 unsigned long nr_runs;
151 unsigned long nr_timestamps;
152 unsigned long nr_unordered_timestamps;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300153 unsigned long nr_context_switch_bugs;
154 unsigned long nr_events;
155 unsigned long nr_lost_chunks;
156 unsigned long nr_lost_events;
157 u64 run_measurement_overhead;
158 u64 sleep_measurement_overhead;
159 u64 start_time;
160 u64 cpu_usage;
161 u64 runavg_cpu_usage;
162 u64 parent_cpu_usage;
163 u64 runavg_parent_cpu_usage;
164 u64 sum_runtime;
165 u64 sum_fluct;
166 u64 run_avg;
167 u64 all_runtime;
168 u64 all_count;
169 u64 cpu_last_switched[MAX_CPUS];
170 struct rb_root atom_root, sorted_atom_root;
171 struct list_head sort_list, cmp_pid;
172};
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200173
174static u64 get_nsecs(void)
175{
176 struct timespec ts;
177
178 clock_gettime(CLOCK_MONOTONIC, &ts);
179
180 return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
181}
182
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300183static void burn_nsecs(struct perf_sched *sched, u64 nsecs)
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200184{
185 u64 T0 = get_nsecs(), T1;
186
187 do {
188 T1 = get_nsecs();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300189 } while (T1 + sched->run_measurement_overhead < T0 + nsecs);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200190}
191
192static void sleep_nsecs(u64 nsecs)
193{
194 struct timespec ts;
195
196 ts.tv_nsec = nsecs % 999999999;
197 ts.tv_sec = nsecs / 999999999;
198
199 nanosleep(&ts, NULL);
200}
201
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300202static void calibrate_run_measurement_overhead(struct perf_sched *sched)
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200203{
204 u64 T0, T1, delta, min_delta = 1000000000ULL;
205 int i;
206
207 for (i = 0; i < 10; i++) {
208 T0 = get_nsecs();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300209 burn_nsecs(sched, 0);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200210 T1 = get_nsecs();
211 delta = T1-T0;
212 min_delta = min(min_delta, delta);
213 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300214 sched->run_measurement_overhead = min_delta;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200215
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200216 printf("run measurement overhead: %" PRIu64 " nsecs\n", min_delta);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200217}
218
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300219static void calibrate_sleep_measurement_overhead(struct perf_sched *sched)
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200220{
221 u64 T0, T1, delta, min_delta = 1000000000ULL;
222 int i;
223
224 for (i = 0; i < 10; i++) {
225 T0 = get_nsecs();
226 sleep_nsecs(10000);
227 T1 = get_nsecs();
228 delta = T1-T0;
229 min_delta = min(min_delta, delta);
230 }
231 min_delta -= 10000;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300232 sched->sleep_measurement_overhead = min_delta;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200233
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200234 printf("sleep measurement overhead: %" PRIu64 " nsecs\n", min_delta);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200235}
236
mingo39aeb522009-09-14 20:04:48 +0200237static struct sched_atom *
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200238get_new_event(struct task_desc *task, u64 timestamp)
Ingo Molnarec156762009-09-11 12:12:54 +0200239{
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200240 struct sched_atom *event = zalloc(sizeof(*event));
Ingo Molnarec156762009-09-11 12:12:54 +0200241 unsigned long idx = task->nr_events;
242 size_t size;
243
244 event->timestamp = timestamp;
245 event->nr = idx;
246
247 task->nr_events++;
mingo39aeb522009-09-14 20:04:48 +0200248 size = sizeof(struct sched_atom *) * task->nr_events;
249 task->atoms = realloc(task->atoms, size);
250 BUG_ON(!task->atoms);
Ingo Molnarec156762009-09-11 12:12:54 +0200251
mingo39aeb522009-09-14 20:04:48 +0200252 task->atoms[idx] = event;
Ingo Molnarec156762009-09-11 12:12:54 +0200253
254 return event;
255}
256
mingo39aeb522009-09-14 20:04:48 +0200257static struct sched_atom *last_event(struct task_desc *task)
Ingo Molnarec156762009-09-11 12:12:54 +0200258{
259 if (!task->nr_events)
260 return NULL;
261
mingo39aeb522009-09-14 20:04:48 +0200262 return task->atoms[task->nr_events - 1];
Ingo Molnarec156762009-09-11 12:12:54 +0200263}
264
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300265static void add_sched_event_run(struct perf_sched *sched, struct task_desc *task,
266 u64 timestamp, u64 duration)
Ingo Molnarec156762009-09-11 12:12:54 +0200267{
mingo39aeb522009-09-14 20:04:48 +0200268 struct sched_atom *event, *curr_event = last_event(task);
Ingo Molnarec156762009-09-11 12:12:54 +0200269
270 /*
Ingo Molnarfbf94822009-09-11 12:12:54 +0200271 * optimize an existing RUN event by merging this one
272 * to it:
273 */
Ingo Molnarec156762009-09-11 12:12:54 +0200274 if (curr_event && curr_event->type == SCHED_EVENT_RUN) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300275 sched->nr_run_events_optimized++;
Ingo Molnarec156762009-09-11 12:12:54 +0200276 curr_event->duration += duration;
277 return;
278 }
279
280 event = get_new_event(task, timestamp);
281
282 event->type = SCHED_EVENT_RUN;
283 event->duration = duration;
284
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300285 sched->nr_run_events++;
Ingo Molnarec156762009-09-11 12:12:54 +0200286}
287
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300288static void add_sched_event_wakeup(struct perf_sched *sched, struct task_desc *task,
289 u64 timestamp, struct task_desc *wakee)
Ingo Molnarec156762009-09-11 12:12:54 +0200290{
mingo39aeb522009-09-14 20:04:48 +0200291 struct sched_atom *event, *wakee_event;
Ingo Molnarec156762009-09-11 12:12:54 +0200292
293 event = get_new_event(task, timestamp);
294 event->type = SCHED_EVENT_WAKEUP;
295 event->wakee = wakee;
296
297 wakee_event = last_event(wakee);
298 if (!wakee_event || wakee_event->type != SCHED_EVENT_SLEEP) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300299 sched->targetless_wakeups++;
Ingo Molnarec156762009-09-11 12:12:54 +0200300 return;
301 }
302 if (wakee_event->wait_sem) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300303 sched->multitarget_wakeups++;
Ingo Molnarec156762009-09-11 12:12:54 +0200304 return;
305 }
306
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200307 wakee_event->wait_sem = zalloc(sizeof(*wakee_event->wait_sem));
Ingo Molnarec156762009-09-11 12:12:54 +0200308 sem_init(wakee_event->wait_sem, 0, 0);
309 wakee_event->specific_wait = 1;
310 event->wait_sem = wakee_event->wait_sem;
311
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300312 sched->nr_wakeup_events++;
Ingo Molnarec156762009-09-11 12:12:54 +0200313}
314
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300315static void add_sched_event_sleep(struct perf_sched *sched, struct task_desc *task,
316 u64 timestamp, u64 task_state __maybe_unused)
Ingo Molnarec156762009-09-11 12:12:54 +0200317{
mingo39aeb522009-09-14 20:04:48 +0200318 struct sched_atom *event = get_new_event(task, timestamp);
Ingo Molnarec156762009-09-11 12:12:54 +0200319
320 event->type = SCHED_EVENT_SLEEP;
321
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300322 sched->nr_sleep_events++;
Ingo Molnarec156762009-09-11 12:12:54 +0200323}
324
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300325static struct task_desc *register_pid(struct perf_sched *sched,
326 unsigned long pid, const char *comm)
Ingo Molnarec156762009-09-11 12:12:54 +0200327{
328 struct task_desc *task;
329
330 BUG_ON(pid >= MAX_PID);
331
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300332 task = sched->pid_to_task[pid];
Ingo Molnarec156762009-09-11 12:12:54 +0200333
334 if (task)
335 return task;
336
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200337 task = zalloc(sizeof(*task));
Ingo Molnarec156762009-09-11 12:12:54 +0200338 task->pid = pid;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300339 task->nr = sched->nr_tasks;
Ingo Molnarec156762009-09-11 12:12:54 +0200340 strcpy(task->comm, comm);
341 /*
342 * every task starts in sleeping state - this gets ignored
343 * if there's no wakeup pointing to this sleep state:
344 */
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300345 add_sched_event_sleep(sched, task, 0, 0);
Ingo Molnarec156762009-09-11 12:12:54 +0200346
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300347 sched->pid_to_task[pid] = task;
348 sched->nr_tasks++;
349 sched->tasks = realloc(sched->tasks, sched->nr_tasks * sizeof(struct task_task *));
350 BUG_ON(!sched->tasks);
351 sched->tasks[task->nr] = task;
Ingo Molnarec156762009-09-11 12:12:54 +0200352
Ingo Molnarad236fd2009-09-11 12:12:54 +0200353 if (verbose)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300354 printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm);
Ingo Molnarec156762009-09-11 12:12:54 +0200355
356 return task;
357}
358
359
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300360static void print_task_traces(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200361{
362 struct task_desc *task;
363 unsigned long i;
364
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300365 for (i = 0; i < sched->nr_tasks; i++) {
366 task = sched->tasks[i];
Ingo Molnarad236fd2009-09-11 12:12:54 +0200367 printf("task %6ld (%20s:%10ld), nr_events: %ld\n",
Ingo Molnarec156762009-09-11 12:12:54 +0200368 task->nr, task->comm, task->pid, task->nr_events);
369 }
370}
371
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300372static void add_cross_task_wakeups(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200373{
374 struct task_desc *task1, *task2;
375 unsigned long i, j;
376
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300377 for (i = 0; i < sched->nr_tasks; i++) {
378 task1 = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200379 j = i + 1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300380 if (j == sched->nr_tasks)
Ingo Molnarec156762009-09-11 12:12:54 +0200381 j = 0;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300382 task2 = sched->tasks[j];
383 add_sched_event_wakeup(sched, task1, 0, task2);
Ingo Molnarec156762009-09-11 12:12:54 +0200384 }
385}
386
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300387static void perf_sched__process_event(struct perf_sched *sched,
388 struct sched_atom *atom)
Ingo Molnarec156762009-09-11 12:12:54 +0200389{
390 int ret = 0;
Ingo Molnarec156762009-09-11 12:12:54 +0200391
mingo39aeb522009-09-14 20:04:48 +0200392 switch (atom->type) {
Ingo Molnarec156762009-09-11 12:12:54 +0200393 case SCHED_EVENT_RUN:
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300394 burn_nsecs(sched, atom->duration);
Ingo Molnarec156762009-09-11 12:12:54 +0200395 break;
396 case SCHED_EVENT_SLEEP:
mingo39aeb522009-09-14 20:04:48 +0200397 if (atom->wait_sem)
398 ret = sem_wait(atom->wait_sem);
Ingo Molnarec156762009-09-11 12:12:54 +0200399 BUG_ON(ret);
400 break;
401 case SCHED_EVENT_WAKEUP:
mingo39aeb522009-09-14 20:04:48 +0200402 if (atom->wait_sem)
403 ret = sem_post(atom->wait_sem);
Ingo Molnarec156762009-09-11 12:12:54 +0200404 BUG_ON(ret);
405 break;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +0200406 case SCHED_EVENT_MIGRATION:
407 break;
Ingo Molnarec156762009-09-11 12:12:54 +0200408 default:
409 BUG_ON(1);
410 }
411}
412
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200413static u64 get_cpu_usage_nsec_parent(void)
Ingo Molnarec156762009-09-11 12:12:54 +0200414{
415 struct rusage ru;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200416 u64 sum;
Ingo Molnarec156762009-09-11 12:12:54 +0200417 int err;
418
419 err = getrusage(RUSAGE_SELF, &ru);
420 BUG_ON(err);
421
422 sum = ru.ru_utime.tv_sec*1e9 + ru.ru_utime.tv_usec*1e3;
423 sum += ru.ru_stime.tv_sec*1e9 + ru.ru_stime.tv_usec*1e3;
424
425 return sum;
426}
427
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800428static int self_open_counters(void)
Ingo Molnarec156762009-09-11 12:12:54 +0200429{
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800430 struct perf_event_attr attr;
431 int fd;
432
433 memset(&attr, 0, sizeof(attr));
434
435 attr.type = PERF_TYPE_SOFTWARE;
436 attr.config = PERF_COUNT_SW_TASK_CLOCK;
437
Yann Droneaud57480d22014-06-30 22:28:47 +0200438 fd = sys_perf_event_open(&attr, 0, -1, -1,
439 perf_event_open_cloexec_flag());
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800440
441 if (fd < 0)
Namhyung Kim60b7d142012-09-12 11:11:06 +0900442 pr_err("Error: sys_perf_event_open() syscall returned "
443 "with %d (%s)\n", fd, strerror(errno));
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800444 return fd;
445}
446
447static u64 get_cpu_usage_nsec_self(int fd)
448{
449 u64 runtime;
Ingo Molnarec156762009-09-11 12:12:54 +0200450 int ret;
451
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800452 ret = read(fd, &runtime, sizeof(runtime));
453 BUG_ON(ret != sizeof(runtime));
Ingo Molnarec156762009-09-11 12:12:54 +0200454
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800455 return runtime;
Ingo Molnarec156762009-09-11 12:12:54 +0200456}
457
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300458struct sched_thread_parms {
459 struct task_desc *task;
460 struct perf_sched *sched;
461};
462
Ingo Molnarec156762009-09-11 12:12:54 +0200463static void *thread_func(void *ctx)
464{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300465 struct sched_thread_parms *parms = ctx;
466 struct task_desc *this_task = parms->task;
467 struct perf_sched *sched = parms->sched;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200468 u64 cpu_usage_0, cpu_usage_1;
Ingo Molnarec156762009-09-11 12:12:54 +0200469 unsigned long i, ret;
470 char comm2[22];
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800471 int fd;
Ingo Molnarec156762009-09-11 12:12:54 +0200472
Arnaldo Carvalho de Melo74cf2492013-12-27 16:55:14 -0300473 zfree(&parms);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300474
Ingo Molnarec156762009-09-11 12:12:54 +0200475 sprintf(comm2, ":%s", this_task->comm);
476 prctl(PR_SET_NAME, comm2);
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800477 fd = self_open_counters();
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300478 if (fd < 0)
479 return NULL;
Ingo Molnarec156762009-09-11 12:12:54 +0200480again:
481 ret = sem_post(&this_task->ready_for_work);
482 BUG_ON(ret);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300483 ret = pthread_mutex_lock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200484 BUG_ON(ret);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300485 ret = pthread_mutex_unlock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200486 BUG_ON(ret);
Ingo Molnarec156762009-09-11 12:12:54 +0200487
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800488 cpu_usage_0 = get_cpu_usage_nsec_self(fd);
Ingo Molnarec156762009-09-11 12:12:54 +0200489
490 for (i = 0; i < this_task->nr_events; i++) {
491 this_task->curr_event = i;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300492 perf_sched__process_event(sched, this_task->atoms[i]);
Ingo Molnarec156762009-09-11 12:12:54 +0200493 }
494
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800495 cpu_usage_1 = get_cpu_usage_nsec_self(fd);
Ingo Molnarec156762009-09-11 12:12:54 +0200496 this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
Ingo Molnarec156762009-09-11 12:12:54 +0200497 ret = sem_post(&this_task->work_done_sem);
498 BUG_ON(ret);
Ingo Molnarec156762009-09-11 12:12:54 +0200499
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300500 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200501 BUG_ON(ret);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300502 ret = pthread_mutex_unlock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200503 BUG_ON(ret);
Ingo Molnarec156762009-09-11 12:12:54 +0200504
505 goto again;
506}
507
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300508static void create_tasks(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200509{
510 struct task_desc *task;
511 pthread_attr_t attr;
512 unsigned long i;
513 int err;
514
515 err = pthread_attr_init(&attr);
516 BUG_ON(err);
Jiri Pirko12f7e032011-01-10 14:14:23 -0200517 err = pthread_attr_setstacksize(&attr,
518 (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
Ingo Molnarec156762009-09-11 12:12:54 +0200519 BUG_ON(err);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300520 err = pthread_mutex_lock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200521 BUG_ON(err);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300522 err = pthread_mutex_lock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200523 BUG_ON(err);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300524 for (i = 0; i < sched->nr_tasks; i++) {
525 struct sched_thread_parms *parms = malloc(sizeof(*parms));
526 BUG_ON(parms == NULL);
527 parms->task = task = sched->tasks[i];
528 parms->sched = sched;
Ingo Molnarec156762009-09-11 12:12:54 +0200529 sem_init(&task->sleep_sem, 0, 0);
530 sem_init(&task->ready_for_work, 0, 0);
531 sem_init(&task->work_done_sem, 0, 0);
532 task->curr_event = 0;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300533 err = pthread_create(&task->thread, &attr, thread_func, parms);
Ingo Molnarec156762009-09-11 12:12:54 +0200534 BUG_ON(err);
535 }
536}
537
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300538static void wait_for_tasks(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200539{
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200540 u64 cpu_usage_0, cpu_usage_1;
Ingo Molnarec156762009-09-11 12:12:54 +0200541 struct task_desc *task;
542 unsigned long i, ret;
543
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300544 sched->start_time = get_nsecs();
545 sched->cpu_usage = 0;
546 pthread_mutex_unlock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200547
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300548 for (i = 0; i < sched->nr_tasks; i++) {
549 task = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200550 ret = sem_wait(&task->ready_for_work);
551 BUG_ON(ret);
552 sem_init(&task->ready_for_work, 0, 0);
553 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300554 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200555 BUG_ON(ret);
556
557 cpu_usage_0 = get_cpu_usage_nsec_parent();
558
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300559 pthread_mutex_unlock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200560
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300561 for (i = 0; i < sched->nr_tasks; i++) {
562 task = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200563 ret = sem_wait(&task->work_done_sem);
564 BUG_ON(ret);
565 sem_init(&task->work_done_sem, 0, 0);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300566 sched->cpu_usage += task->cpu_usage;
Ingo Molnarec156762009-09-11 12:12:54 +0200567 task->cpu_usage = 0;
568 }
569
570 cpu_usage_1 = get_cpu_usage_nsec_parent();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300571 if (!sched->runavg_cpu_usage)
572 sched->runavg_cpu_usage = sched->cpu_usage;
573 sched->runavg_cpu_usage = (sched->runavg_cpu_usage * 9 + sched->cpu_usage) / 10;
Ingo Molnarec156762009-09-11 12:12:54 +0200574
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300575 sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
576 if (!sched->runavg_parent_cpu_usage)
577 sched->runavg_parent_cpu_usage = sched->parent_cpu_usage;
578 sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * 9 +
579 sched->parent_cpu_usage)/10;
Ingo Molnarec156762009-09-11 12:12:54 +0200580
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300581 ret = pthread_mutex_lock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200582 BUG_ON(ret);
583
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300584 for (i = 0; i < sched->nr_tasks; i++) {
585 task = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200586 sem_init(&task->sleep_sem, 0, 0);
587 task->curr_event = 0;
588 }
589}
590
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300591static void run_one_test(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200592{
Kyle McMartinfb7d0b32011-01-24 11:13:04 -0500593 u64 T0, T1, delta, avg_delta, fluct;
Ingo Molnarec156762009-09-11 12:12:54 +0200594
595 T0 = get_nsecs();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300596 wait_for_tasks(sched);
Ingo Molnarec156762009-09-11 12:12:54 +0200597 T1 = get_nsecs();
598
599 delta = T1 - T0;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300600 sched->sum_runtime += delta;
601 sched->nr_runs++;
Ingo Molnarec156762009-09-11 12:12:54 +0200602
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300603 avg_delta = sched->sum_runtime / sched->nr_runs;
Ingo Molnarec156762009-09-11 12:12:54 +0200604 if (delta < avg_delta)
605 fluct = avg_delta - delta;
606 else
607 fluct = delta - avg_delta;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300608 sched->sum_fluct += fluct;
609 if (!sched->run_avg)
610 sched->run_avg = delta;
611 sched->run_avg = (sched->run_avg * 9 + delta) / 10;
Ingo Molnarec156762009-09-11 12:12:54 +0200612
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300613 printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / 1000000.0);
Ingo Molnarec156762009-09-11 12:12:54 +0200614
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300615 printf("ravg: %0.2f, ", (double)sched->run_avg / 1e6);
Ingo Molnarec156762009-09-11 12:12:54 +0200616
Ingo Molnarad236fd2009-09-11 12:12:54 +0200617 printf("cpu: %0.2f / %0.2f",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300618 (double)sched->cpu_usage / 1e6, (double)sched->runavg_cpu_usage / 1e6);
Ingo Molnarec156762009-09-11 12:12:54 +0200619
620#if 0
621 /*
Ingo Molnarfbf94822009-09-11 12:12:54 +0200622 * rusage statistics done by the parent, these are less
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300623 * accurate than the sched->sum_exec_runtime based statistics:
Ingo Molnarfbf94822009-09-11 12:12:54 +0200624 */
Ingo Molnarad236fd2009-09-11 12:12:54 +0200625 printf(" [%0.2f / %0.2f]",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300626 (double)sched->parent_cpu_usage/1e6,
627 (double)sched->runavg_parent_cpu_usage/1e6);
Ingo Molnarec156762009-09-11 12:12:54 +0200628#endif
629
Ingo Molnarad236fd2009-09-11 12:12:54 +0200630 printf("\n");
Ingo Molnarec156762009-09-11 12:12:54 +0200631
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300632 if (sched->nr_sleep_corrections)
633 printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections);
634 sched->nr_sleep_corrections = 0;
Ingo Molnarec156762009-09-11 12:12:54 +0200635}
636
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300637static void test_calibrations(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200638{
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200639 u64 T0, T1;
Ingo Molnarec156762009-09-11 12:12:54 +0200640
641 T0 = get_nsecs();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300642 burn_nsecs(sched, 1e6);
Ingo Molnarec156762009-09-11 12:12:54 +0200643 T1 = get_nsecs();
644
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200645 printf("the run test took %" PRIu64 " nsecs\n", T1 - T0);
Ingo Molnarec156762009-09-11 12:12:54 +0200646
647 T0 = get_nsecs();
648 sleep_nsecs(1e6);
649 T1 = get_nsecs();
650
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200651 printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0);
Ingo Molnarec156762009-09-11 12:12:54 +0200652}
653
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300654static int
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300655replay_wakeup_event(struct perf_sched *sched,
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300656 struct perf_evsel *evsel, struct perf_sample *sample,
657 struct machine *machine __maybe_unused)
Ingo Molnarec156762009-09-11 12:12:54 +0200658{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300659 const char *comm = perf_evsel__strval(evsel, sample, "comm");
660 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200661 struct task_desc *waker, *wakee;
662
663 if (verbose) {
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -0300664 printf("sched_wakeup event %p\n", evsel);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200665
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300666 printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200667 }
668
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -0300669 waker = register_pid(sched, sample->tid, "<unknown>");
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300670 wakee = register_pid(sched, pid, comm);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200671
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300672 add_sched_event_wakeup(sched, waker, sample->time, wakee);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300673 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200674}
675
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300676static int replay_switch_event(struct perf_sched *sched,
677 struct perf_evsel *evsel,
678 struct perf_sample *sample,
679 struct machine *machine __maybe_unused)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200680{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300681 const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"),
682 *next_comm = perf_evsel__strval(evsel, sample, "next_comm");
683 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
684 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
685 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
Irina Tirdea1d037ca2012-09-11 01:15:03 +0300686 struct task_desc *prev, __maybe_unused *next;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -0300687 u64 timestamp0, timestamp = sample->time;
688 int cpu = sample->cpu;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200689 s64 delta;
690
Ingo Molnarad236fd2009-09-11 12:12:54 +0200691 if (verbose)
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -0300692 printf("sched_switch event %p\n", evsel);
Ingo Molnarad236fd2009-09-11 12:12:54 +0200693
Ingo Molnarfbf94822009-09-11 12:12:54 +0200694 if (cpu >= MAX_CPUS || cpu < 0)
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300695 return 0;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200696
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300697 timestamp0 = sched->cpu_last_switched[cpu];
Ingo Molnarfbf94822009-09-11 12:12:54 +0200698 if (timestamp0)
699 delta = timestamp - timestamp0;
700 else
701 delta = 0;
702
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300703 if (delta < 0) {
Namhyung Kim60b7d142012-09-12 11:11:06 +0900704 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300705 return -1;
706 }
Ingo Molnarfbf94822009-09-11 12:12:54 +0200707
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300708 pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
709 prev_comm, prev_pid, next_comm, next_pid, delta);
Ingo Molnarfbf94822009-09-11 12:12:54 +0200710
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300711 prev = register_pid(sched, prev_pid, prev_comm);
712 next = register_pid(sched, next_pid, next_comm);
Ingo Molnarfbf94822009-09-11 12:12:54 +0200713
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300714 sched->cpu_last_switched[cpu] = timestamp;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200715
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300716 add_sched_event_run(sched, prev, timestamp, delta);
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300717 add_sched_event_sleep(sched, prev, timestamp, prev_state);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300718
719 return 0;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200720}
721
David Aherncb627502013-08-07 22:50:47 -0400722static int replay_fork_event(struct perf_sched *sched,
723 union perf_event *event,
724 struct machine *machine)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200725{
David Aherncb627502013-08-07 22:50:47 -0400726 struct thread *child, *parent;
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300727
Adrian Hunter314add62013-08-27 11:23:03 +0300728 child = machine__findnew_thread(machine, event->fork.pid,
729 event->fork.tid);
730 parent = machine__findnew_thread(machine, event->fork.ppid,
731 event->fork.ptid);
David Aherncb627502013-08-07 22:50:47 -0400732
733 if (child == NULL || parent == NULL) {
734 pr_debug("thread does not exist on fork event: child %p, parent %p\n",
735 child, parent);
736 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200737 }
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300738
David Aherncb627502013-08-07 22:50:47 -0400739 if (verbose) {
740 printf("fork event\n");
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +0200741 printf("... parent: %s/%d\n", thread__comm_str(parent), parent->tid);
742 printf("... child: %s/%d\n", thread__comm_str(child), child->tid);
David Aherncb627502013-08-07 22:50:47 -0400743 }
744
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +0200745 register_pid(sched, parent->tid, thread__comm_str(parent));
746 register_pid(sched, child->tid, thread__comm_str(child));
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300747 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200748}
749
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200750struct sort_dimension {
751 const char *name;
Ingo Molnarb5fae122009-09-11 12:12:54 +0200752 sort_fn_t cmp;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200753 struct list_head list;
754};
755
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200756static int
mingo39aeb522009-09-14 20:04:48 +0200757thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200758{
759 struct sort_dimension *sort;
760 int ret = 0;
761
Ingo Molnarb5fae122009-09-11 12:12:54 +0200762 BUG_ON(list_empty(list));
763
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200764 list_for_each_entry(sort, list, list) {
765 ret = sort->cmp(l, r);
766 if (ret)
767 return ret;
768 }
769
770 return ret;
771}
772
mingo39aeb522009-09-14 20:04:48 +0200773static struct work_atoms *
Ingo Molnarb5fae122009-09-11 12:12:54 +0200774thread_atoms_search(struct rb_root *root, struct thread *thread,
775 struct list_head *sort_list)
776{
777 struct rb_node *node = root->rb_node;
mingo39aeb522009-09-14 20:04:48 +0200778 struct work_atoms key = { .thread = thread };
Ingo Molnarb5fae122009-09-11 12:12:54 +0200779
780 while (node) {
mingo39aeb522009-09-14 20:04:48 +0200781 struct work_atoms *atoms;
Ingo Molnarb5fae122009-09-11 12:12:54 +0200782 int cmp;
783
mingo39aeb522009-09-14 20:04:48 +0200784 atoms = container_of(node, struct work_atoms, node);
Ingo Molnarb5fae122009-09-11 12:12:54 +0200785
786 cmp = thread_lat_cmp(sort_list, &key, atoms);
787 if (cmp > 0)
788 node = node->rb_left;
789 else if (cmp < 0)
790 node = node->rb_right;
791 else {
792 BUG_ON(thread != atoms->thread);
793 return atoms;
794 }
795 }
796 return NULL;
797}
798
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200799static void
mingo39aeb522009-09-14 20:04:48 +0200800__thread_latency_insert(struct rb_root *root, struct work_atoms *data,
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200801 struct list_head *sort_list)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200802{
803 struct rb_node **new = &(root->rb_node), *parent = NULL;
804
805 while (*new) {
mingo39aeb522009-09-14 20:04:48 +0200806 struct work_atoms *this;
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200807 int cmp;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200808
mingo39aeb522009-09-14 20:04:48 +0200809 this = container_of(*new, struct work_atoms, node);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200810 parent = *new;
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200811
812 cmp = thread_lat_cmp(sort_list, data, this);
813
814 if (cmp > 0)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200815 new = &((*new)->rb_left);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200816 else
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200817 new = &((*new)->rb_right);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200818 }
819
820 rb_link_node(&data->node, parent, new);
821 rb_insert_color(&data->node, root);
822}
823
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300824static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200825{
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200826 struct work_atoms *atoms = zalloc(sizeof(*atoms));
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300827 if (!atoms) {
828 pr_err("No memory at %s\n", __func__);
829 return -1;
830 }
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200831
Frederic Weisbecker17562202009-09-12 23:11:32 +0200832 atoms->thread = thread;
mingo39aeb522009-09-14 20:04:48 +0200833 INIT_LIST_HEAD(&atoms->work_list);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300834 __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300835 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200836}
837
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300838static char sched_out_state(u64 prev_state)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200839{
840 const char *str = TASK_STATE_TO_CHAR_STR;
841
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300842 return str[prev_state];
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200843}
844
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300845static int
mingo39aeb522009-09-14 20:04:48 +0200846add_sched_out_event(struct work_atoms *atoms,
847 char run_state,
848 u64 timestamp)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200849{
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200850 struct work_atom *atom = zalloc(sizeof(*atom));
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300851 if (!atom) {
852 pr_err("Non memory at %s", __func__);
853 return -1;
854 }
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200855
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +0200856 atom->sched_out_time = timestamp;
857
mingo39aeb522009-09-14 20:04:48 +0200858 if (run_state == 'R') {
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200859 atom->state = THREAD_WAIT_CPU;
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +0200860 atom->wake_up_time = atom->sched_out_time;
Frederic Weisbeckerc6ced612009-09-13 00:46:19 +0200861 }
862
mingo39aeb522009-09-14 20:04:48 +0200863 list_add_tail(&atom->list, &atoms->work_list);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300864 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200865}
866
867static void
Irina Tirdea1d037ca2012-09-11 01:15:03 +0300868add_runtime_event(struct work_atoms *atoms, u64 delta,
869 u64 timestamp __maybe_unused)
mingo39aeb522009-09-14 20:04:48 +0200870{
871 struct work_atom *atom;
872
873 BUG_ON(list_empty(&atoms->work_list));
874
875 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
876
877 atom->runtime += delta;
878 atoms->total_runtime += delta;
879}
880
881static void
882add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200883{
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200884 struct work_atom *atom;
Frederic Weisbecker66685672009-09-13 01:56:25 +0200885 u64 delta;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200886
mingo39aeb522009-09-14 20:04:48 +0200887 if (list_empty(&atoms->work_list))
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200888 return;
889
mingo39aeb522009-09-14 20:04:48 +0200890 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200891
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200892 if (atom->state != THREAD_WAIT_CPU)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200893 return;
894
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200895 if (timestamp < atom->wake_up_time) {
896 atom->state = THREAD_IGNORE;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200897 return;
898 }
899
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200900 atom->state = THREAD_SCHED_IN;
901 atom->sched_in_time = timestamp;
Frederic Weisbecker66685672009-09-13 01:56:25 +0200902
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200903 delta = atom->sched_in_time - atom->wake_up_time;
Frederic Weisbecker66685672009-09-13 01:56:25 +0200904 atoms->total_lat += delta;
Frederic Weisbecker3786310a2009-12-09 21:40:08 +0100905 if (delta > atoms->max_lat) {
Frederic Weisbecker66685672009-09-13 01:56:25 +0200906 atoms->max_lat = delta;
Frederic Weisbecker3786310a2009-12-09 21:40:08 +0100907 atoms->max_lat_at = timestamp;
908 }
Frederic Weisbecker66685672009-09-13 01:56:25 +0200909 atoms->nb_atoms++;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200910}
911
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300912static int latency_switch_event(struct perf_sched *sched,
913 struct perf_evsel *evsel,
914 struct perf_sample *sample,
915 struct machine *machine)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200916{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300917 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
918 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
919 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
mingo39aeb522009-09-14 20:04:48 +0200920 struct work_atoms *out_events, *in_events;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200921 struct thread *sched_out, *sched_in;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -0300922 u64 timestamp0, timestamp = sample->time;
923 int cpu = sample->cpu;
Ingo Molnarea92ed52009-09-12 10:08:34 +0200924 s64 delta;
925
mingo39aeb522009-09-14 20:04:48 +0200926 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
Ingo Molnarea92ed52009-09-12 10:08:34 +0200927
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300928 timestamp0 = sched->cpu_last_switched[cpu];
929 sched->cpu_last_switched[cpu] = timestamp;
Ingo Molnarea92ed52009-09-12 10:08:34 +0200930 if (timestamp0)
931 delta = timestamp - timestamp0;
932 else
933 delta = 0;
934
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300935 if (delta < 0) {
936 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
937 return -1;
938 }
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200939
Adrian Hunter1fcb8762014-07-14 13:02:25 +0300940 sched_out = machine__findnew_thread(machine, -1, prev_pid);
941 sched_in = machine__findnew_thread(machine, -1, next_pid);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200942
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300943 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
mingo39aeb522009-09-14 20:04:48 +0200944 if (!out_events) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300945 if (thread_atoms_insert(sched, sched_out))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300946 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300947 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300948 if (!out_events) {
949 pr_err("out-event: Internal tree error");
950 return -1;
951 }
mingo39aeb522009-09-14 20:04:48 +0200952 }
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300953 if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300954 return -1;
mingo39aeb522009-09-14 20:04:48 +0200955
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300956 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
mingo39aeb522009-09-14 20:04:48 +0200957 if (!in_events) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300958 if (thread_atoms_insert(sched, sched_in))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300959 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300960 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300961 if (!in_events) {
962 pr_err("in-event: Internal tree error");
963 return -1;
964 }
mingo39aeb522009-09-14 20:04:48 +0200965 /*
966 * Take came in we have not heard about yet,
967 * add in an initial atom in runnable state:
968 */
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300969 if (add_sched_out_event(in_events, 'R', timestamp))
970 return -1;
mingo39aeb522009-09-14 20:04:48 +0200971 }
972 add_sched_in_event(in_events, timestamp);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300973
974 return 0;
mingo39aeb522009-09-14 20:04:48 +0200975}
976
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300977static int latency_runtime_event(struct perf_sched *sched,
978 struct perf_evsel *evsel,
979 struct perf_sample *sample,
980 struct machine *machine)
mingo39aeb522009-09-14 20:04:48 +0200981{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300982 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
983 const u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
Adrian Hunter1fcb8762014-07-14 13:02:25 +0300984 struct thread *thread = machine__findnew_thread(machine, -1, pid);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300985 struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -0300986 u64 timestamp = sample->time;
987 int cpu = sample->cpu;
mingo39aeb522009-09-14 20:04:48 +0200988
989 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
mingo39aeb522009-09-14 20:04:48 +0200990 if (!atoms) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300991 if (thread_atoms_insert(sched, thread))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300992 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300993 atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300994 if (!atoms) {
Namhyung Kim60b7d142012-09-12 11:11:06 +0900995 pr_err("in-event: Internal tree error");
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300996 return -1;
997 }
998 if (add_sched_out_event(atoms, 'R', timestamp))
999 return -1;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001000 }
1001
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001002 add_runtime_event(atoms, runtime, timestamp);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001003 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001004}
1005
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001006static int latency_wakeup_event(struct perf_sched *sched,
1007 struct perf_evsel *evsel,
1008 struct perf_sample *sample,
1009 struct machine *machine)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001010{
Peter Zijlstra0680ee72014-05-12 20:19:46 +02001011 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
mingo39aeb522009-09-14 20:04:48 +02001012 struct work_atoms *atoms;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +02001013 struct work_atom *atom;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001014 struct thread *wakee;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001015 u64 timestamp = sample->time;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001016
Adrian Hunter1fcb8762014-07-14 13:02:25 +03001017 wakee = machine__findnew_thread(machine, -1, pid);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001018 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
Frederic Weisbecker17562202009-09-12 23:11:32 +02001019 if (!atoms) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001020 if (thread_atoms_insert(sched, wakee))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001021 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001022 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001023 if (!atoms) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001024 pr_err("wakeup-event: Internal tree error");
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001025 return -1;
1026 }
1027 if (add_sched_out_event(atoms, 'S', timestamp))
1028 return -1;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001029 }
1030
mingo39aeb522009-09-14 20:04:48 +02001031 BUG_ON(list_empty(&atoms->work_list));
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001032
mingo39aeb522009-09-14 20:04:48 +02001033 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001034
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001035 /*
Dongsheng Yang67d62592014-05-13 10:38:21 +09001036 * As we do not guarantee the wakeup event happens when
1037 * task is out of run queue, also may happen when task is
1038 * on run queue and wakeup only change ->state to TASK_RUNNING,
1039 * then we should not set the ->wake_up_time when wake up a
1040 * task which is on run queue.
1041 *
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001042 * You WILL be missing events if you've recorded only
1043 * one CPU, or are only looking at only one, so don't
Dongsheng Yang67d62592014-05-13 10:38:21 +09001044 * skip in this case.
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001045 */
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001046 if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
Dongsheng Yang67d62592014-05-13 10:38:21 +09001047 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001048
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001049 sched->nr_timestamps++;
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001050 if (atom->sched_out_time > timestamp) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001051 sched->nr_unordered_timestamps++;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001052 return 0;
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001053 }
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +02001054
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +02001055 atom->state = THREAD_WAIT_CPU;
1056 atom->wake_up_time = timestamp;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001057 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001058}
1059
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001060static int latency_migrate_task_event(struct perf_sched *sched,
1061 struct perf_evsel *evsel,
1062 struct perf_sample *sample,
1063 struct machine *machine)
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001064{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001065 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001066 u64 timestamp = sample->time;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001067 struct work_atoms *atoms;
1068 struct work_atom *atom;
1069 struct thread *migrant;
1070
1071 /*
1072 * Only need to worry about migration when profiling one CPU.
1073 */
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001074 if (sched->profile_cpu == -1)
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001075 return 0;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001076
Adrian Hunter1fcb8762014-07-14 13:02:25 +03001077 migrant = machine__findnew_thread(machine, -1, pid);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001078 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001079 if (!atoms) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001080 if (thread_atoms_insert(sched, migrant))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001081 return -1;
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +02001082 register_pid(sched, migrant->tid, thread__comm_str(migrant));
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001083 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001084 if (!atoms) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001085 pr_err("migration-event: Internal tree error");
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001086 return -1;
1087 }
1088 if (add_sched_out_event(atoms, 'R', timestamp))
1089 return -1;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001090 }
1091
1092 BUG_ON(list_empty(&atoms->work_list));
1093
1094 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1095 atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1096
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001097 sched->nr_timestamps++;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001098
1099 if (atom->sched_out_time > timestamp)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001100 sched->nr_unordered_timestamps++;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001101
1102 return 0;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001103}
1104
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001105static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001106{
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001107 int i;
1108 int ret;
Frederic Weisbecker66685672009-09-13 01:56:25 +02001109 u64 avg;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001110
mingo39aeb522009-09-14 20:04:48 +02001111 if (!work_list->nb_atoms)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001112 return;
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001113 /*
1114 * Ignore idle threads:
1115 */
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +02001116 if (!strcmp(thread__comm_str(work_list->thread), "swapper"))
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001117 return;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001118
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001119 sched->all_runtime += work_list->total_runtime;
1120 sched->all_count += work_list->nb_atoms;
Frederic Weisbecker66685672009-09-13 01:56:25 +02001121
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +02001122 ret = printf(" %s:%d ", thread__comm_str(work_list->thread), work_list->thread->tid);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001123
mingo08f69e62009-09-14 18:30:44 +02001124 for (i = 0; i < 24 - ret; i++)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001125 printf(" ");
1126
mingo39aeb522009-09-14 20:04:48 +02001127 avg = work_list->total_lat / work_list->nb_atoms;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001128
Ramkumar Ramachandra80790e02014-03-17 10:18:21 -04001129 printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %13.6f s\n",
mingo39aeb522009-09-14 20:04:48 +02001130 (double)work_list->total_runtime / 1e6,
1131 work_list->nb_atoms, (double)avg / 1e6,
Frederic Weisbecker3786310a2009-12-09 21:40:08 +01001132 (double)work_list->max_lat / 1e6,
1133 (double)work_list->max_lat_at / 1e9);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001134}
1135
mingo39aeb522009-09-14 20:04:48 +02001136static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001137{
Adrian Hunter38051232013-07-04 16:20:31 +03001138 if (l->thread->tid < r->thread->tid)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001139 return -1;
Adrian Hunter38051232013-07-04 16:20:31 +03001140 if (l->thread->tid > r->thread->tid)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001141 return 1;
1142
1143 return 0;
1144}
1145
mingo39aeb522009-09-14 20:04:48 +02001146static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001147{
1148 u64 avgl, avgr;
1149
1150 if (!l->nb_atoms)
1151 return -1;
1152
1153 if (!r->nb_atoms)
1154 return 1;
1155
1156 avgl = l->total_lat / l->nb_atoms;
1157 avgr = r->total_lat / r->nb_atoms;
1158
1159 if (avgl < avgr)
1160 return -1;
1161 if (avgl > avgr)
1162 return 1;
1163
1164 return 0;
1165}
1166
mingo39aeb522009-09-14 20:04:48 +02001167static int max_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001168{
1169 if (l->max_lat < r->max_lat)
1170 return -1;
1171 if (l->max_lat > r->max_lat)
1172 return 1;
1173
1174 return 0;
1175}
1176
mingo39aeb522009-09-14 20:04:48 +02001177static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001178{
1179 if (l->nb_atoms < r->nb_atoms)
1180 return -1;
1181 if (l->nb_atoms > r->nb_atoms)
1182 return 1;
1183
1184 return 0;
1185}
1186
mingo39aeb522009-09-14 20:04:48 +02001187static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001188{
1189 if (l->total_runtime < r->total_runtime)
1190 return -1;
1191 if (l->total_runtime > r->total_runtime)
1192 return 1;
1193
1194 return 0;
1195}
1196
Randy Dunlapcbef79a2009-10-05 13:17:29 -07001197static int sort_dimension__add(const char *tok, struct list_head *list)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001198{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001199 size_t i;
1200 static struct sort_dimension avg_sort_dimension = {
1201 .name = "avg",
1202 .cmp = avg_cmp,
1203 };
1204 static struct sort_dimension max_sort_dimension = {
1205 .name = "max",
1206 .cmp = max_cmp,
1207 };
1208 static struct sort_dimension pid_sort_dimension = {
1209 .name = "pid",
1210 .cmp = pid_cmp,
1211 };
1212 static struct sort_dimension runtime_sort_dimension = {
1213 .name = "runtime",
1214 .cmp = runtime_cmp,
1215 };
1216 static struct sort_dimension switch_sort_dimension = {
1217 .name = "switch",
1218 .cmp = switch_cmp,
1219 };
1220 struct sort_dimension *available_sorts[] = {
1221 &pid_sort_dimension,
1222 &avg_sort_dimension,
1223 &max_sort_dimension,
1224 &switch_sort_dimension,
1225 &runtime_sort_dimension,
1226 };
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001227
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001228 for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001229 if (!strcmp(available_sorts[i]->name, tok)) {
1230 list_add_tail(&available_sorts[i]->list, list);
1231
1232 return 0;
1233 }
1234 }
1235
1236 return -1;
1237}
1238
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001239static void perf_sched__sort_lat(struct perf_sched *sched)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001240{
1241 struct rb_node *node;
1242
1243 for (;;) {
mingo39aeb522009-09-14 20:04:48 +02001244 struct work_atoms *data;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001245 node = rb_first(&sched->atom_root);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001246 if (!node)
1247 break;
1248
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001249 rb_erase(node, &sched->atom_root);
mingo39aeb522009-09-14 20:04:48 +02001250 data = rb_entry(node, struct work_atoms, node);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001251 __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001252 }
1253}
1254
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001255static int process_sched_wakeup_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001256 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001257 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001258 struct machine *machine)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001259{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001260 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001261
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001262 if (sched->tp_handler->wakeup_event)
1263 return sched->tp_handler->wakeup_event(sched, evsel, sample, machine);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001264
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001265 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001266}
1267
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001268static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
1269 struct perf_sample *sample, struct machine *machine)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001270{
Dongsheng Yang9d372ca2014-05-16 14:37:05 +09001271 const u32 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
1272 struct thread *sched_in;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001273 int new_shortname;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001274 u64 timestamp0, timestamp = sample->time;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001275 s64 delta;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001276 int cpu, this_cpu = sample->cpu;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001277
1278 BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1279
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001280 if (this_cpu > sched->max_cpu)
1281 sched->max_cpu = this_cpu;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001282
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001283 timestamp0 = sched->cpu_last_switched[this_cpu];
1284 sched->cpu_last_switched[this_cpu] = timestamp;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001285 if (timestamp0)
1286 delta = timestamp - timestamp0;
1287 else
1288 delta = 0;
1289
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001290 if (delta < 0) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001291 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001292 return -1;
1293 }
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001294
Adrian Hunter1fcb8762014-07-14 13:02:25 +03001295 sched_in = machine__findnew_thread(machine, -1, next_pid);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001296
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001297 sched->curr_thread[this_cpu] = sched_in;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001298
1299 printf(" ");
1300
1301 new_shortname = 0;
1302 if (!sched_in->shortname[0]) {
Dongsheng6bcab4e2014-05-06 14:39:01 +09001303 if (!strcmp(thread__comm_str(sched_in), "swapper")) {
1304 /*
1305 * Don't allocate a letter-number for swapper:0
1306 * as a shortname. Instead, we use '.' for it.
1307 */
1308 sched_in->shortname[0] = '.';
1309 sched_in->shortname[1] = ' ';
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001310 } else {
Dongsheng6bcab4e2014-05-06 14:39:01 +09001311 sched_in->shortname[0] = sched->next_shortname1;
1312 sched_in->shortname[1] = sched->next_shortname2;
1313
1314 if (sched->next_shortname1 < 'Z') {
1315 sched->next_shortname1++;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001316 } else {
Dongsheng6bcab4e2014-05-06 14:39:01 +09001317 sched->next_shortname1 = 'A';
1318 if (sched->next_shortname2 < '9')
1319 sched->next_shortname2++;
1320 else
1321 sched->next_shortname2 = '0';
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001322 }
1323 }
1324 new_shortname = 1;
1325 }
1326
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001327 for (cpu = 0; cpu <= sched->max_cpu; cpu++) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001328 if (cpu != this_cpu)
1329 printf(" ");
1330 else
1331 printf("*");
1332
Dongsheng6bcab4e2014-05-06 14:39:01 +09001333 if (sched->curr_thread[cpu])
1334 printf("%2s ", sched->curr_thread[cpu]->shortname);
1335 else
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001336 printf(" ");
1337 }
1338
1339 printf(" %12.6f secs ", (double)timestamp/1e9);
1340 if (new_shortname) {
1341 printf("%s => %s:%d\n",
Frederic Weisbeckerb9c51432013-09-11 14:46:56 +02001342 sched_in->shortname, thread__comm_str(sched_in), sched_in->tid);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001343 } else {
1344 printf("\n");
1345 }
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001346
1347 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001348}
1349
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001350static int process_sched_switch_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001351 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001352 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001353 struct machine *machine)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001354{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001355 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001356 int this_cpu = sample->cpu, err = 0;
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001357 u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1358 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001359
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001360 if (sched->curr_pid[this_cpu] != (u32)-1) {
Ingo Molnarc8a37752009-09-16 14:07:00 +02001361 /*
1362 * Are we trying to switch away a PID that is
1363 * not current?
1364 */
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001365 if (sched->curr_pid[this_cpu] != prev_pid)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001366 sched->nr_context_switch_bugs++;
Ingo Molnarc8a37752009-09-16 14:07:00 +02001367 }
Ingo Molnarc8a37752009-09-16 14:07:00 +02001368
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001369 if (sched->tp_handler->switch_event)
1370 err = sched->tp_handler->switch_event(sched, evsel, sample, machine);
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001371
1372 sched->curr_pid[this_cpu] = next_pid;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001373 return err;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001374}
1375
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001376static int process_sched_runtime_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001377 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001378 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001379 struct machine *machine)
mingo39aeb522009-09-14 20:04:48 +02001380{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001381 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
mingo39aeb522009-09-14 20:04:48 +02001382
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001383 if (sched->tp_handler->runtime_event)
1384 return sched->tp_handler->runtime_event(sched, evsel, sample, machine);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001385
1386 return 0;
Ingo Molnarec156762009-09-11 12:12:54 +02001387}
1388
David Aherncb627502013-08-07 22:50:47 -04001389static int perf_sched__process_fork_event(struct perf_tool *tool,
1390 union perf_event *event,
1391 struct perf_sample *sample,
1392 struct machine *machine)
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001393{
1394 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
1395
David Aherncb627502013-08-07 22:50:47 -04001396 /* run the fork event through the perf machineruy */
1397 perf_event__process_fork(tool, event, sample, machine);
1398
1399 /* and then run additional processing needed for this command */
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001400 if (sched->tp_handler->fork_event)
David Aherncb627502013-08-07 22:50:47 -04001401 return sched->tp_handler->fork_event(sched, event, machine);
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001402
1403 return 0;
1404}
1405
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001406static int process_sched_migrate_task_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001407 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001408 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001409 struct machine *machine)
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001410{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001411 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001412
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001413 if (sched->tp_handler->migrate_task_event)
1414 return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine);
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001415
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001416 return 0;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001417}
1418
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001419typedef int (*tracepoint_handler)(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001420 struct perf_evsel *evsel,
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001421 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001422 struct machine *machine);
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001423
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001424static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused,
1425 union perf_event *event __maybe_unused,
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001426 struct perf_sample *sample,
1427 struct perf_evsel *evsel,
1428 struct machine *machine)
Ingo Molnarec156762009-09-11 12:12:54 +02001429{
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001430 int err = 0;
Ingo Molnarec156762009-09-11 12:12:54 +02001431
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001432 evsel->hists.stats.total_period += sample->period;
Namhyung Kim1844dbc2014-05-28 14:12:18 +09001433 hists__inc_nr_samples(&evsel->hists, true);
Julia Lawallf39cdf22009-10-17 08:43:17 +02001434
Arnaldo Carvalho de Melo744a9712013-11-06 10:17:38 -03001435 if (evsel->handler != NULL) {
1436 tracepoint_handler f = evsel->handler;
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001437 err = f(tool, evsel, sample, machine);
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001438 }
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001439
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001440 return err;
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001441}
1442
David Ahernad9def72013-08-07 22:50:44 -04001443static int perf_sched__read_events(struct perf_sched *sched,
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001444 struct perf_session **psession)
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001445{
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001446 const struct perf_evsel_str_handler handlers[] = {
1447 { "sched:sched_switch", process_sched_switch_event, },
1448 { "sched:sched_stat_runtime", process_sched_runtime_event, },
1449 { "sched:sched_wakeup", process_sched_wakeup_event, },
1450 { "sched:sched_wakeup_new", process_sched_wakeup_event, },
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001451 { "sched:sched_migrate_task", process_sched_migrate_task_event, },
1452 };
Arnaldo Carvalho de Meloda378962012-06-27 13:08:42 -03001453 struct perf_session *session;
Jiri Olsaf5fc1412013-10-15 16:27:32 +02001454 struct perf_data_file file = {
1455 .path = input_name,
1456 .mode = PERF_DATA_MODE_READ,
1457 };
Arnaldo Carvalho de Meloda378962012-06-27 13:08:42 -03001458
Jiri Olsaf5fc1412013-10-15 16:27:32 +02001459 session = perf_session__new(&file, false, &sched->tool);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001460 if (session == NULL) {
1461 pr_debug("No Memory for session\n");
1462 return -1;
1463 }
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -02001464
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001465 if (perf_session__set_tracepoints_handlers(session, handlers))
1466 goto out_delete;
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001467
Arnaldo Carvalho de Melocee75ac2010-05-14 13:16:55 -03001468 if (perf_session__has_traces(session, "record -R")) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001469 int err = perf_session__process_events(session, &sched->tool);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001470 if (err) {
1471 pr_err("Failed to process events, error %d", err);
1472 goto out_delete;
1473 }
Jiri Olsa4c09baf2011-08-08 23:03:34 +02001474
Arnaldo Carvalho de Melo28a6b6a2012-12-18 16:24:46 -03001475 sched->nr_events = session->stats.nr_events[0];
1476 sched->nr_lost_events = session->stats.total_lost;
1477 sched->nr_lost_chunks = session->stats.nr_events[PERF_RECORD_LOST];
Arnaldo Carvalho de Melocee75ac2010-05-14 13:16:55 -03001478 }
Arnaldo Carvalho de Melod549c7692009-12-27 21:37:02 -02001479
Jiri Olsa4c09baf2011-08-08 23:03:34 +02001480 if (psession)
1481 *psession = session;
David Ahernad9def72013-08-07 22:50:44 -04001482 else
1483 perf_session__delete(session);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001484
1485 return 0;
1486
1487out_delete:
1488 perf_session__delete(session);
1489 return -1;
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001490}
1491
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001492static void print_bad_events(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001493{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001494 if (sched->nr_unordered_timestamps && sched->nr_timestamps) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001495 printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001496 (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0,
1497 sched->nr_unordered_timestamps, sched->nr_timestamps);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001498 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001499 if (sched->nr_lost_events && sched->nr_events) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001500 printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001501 (double)sched->nr_lost_events/(double)sched->nr_events * 100.0,
1502 sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001503 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001504 if (sched->nr_context_switch_bugs && sched->nr_timestamps) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001505 printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001506 (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0,
1507 sched->nr_context_switch_bugs, sched->nr_timestamps);
1508 if (sched->nr_lost_events)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001509 printf(" (due to lost events?)");
1510 printf("\n");
1511 }
1512}
1513
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001514static int perf_sched__lat(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001515{
1516 struct rb_node *next;
Jiri Olsa4c09baf2011-08-08 23:03:34 +02001517 struct perf_session *session;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001518
1519 setup_pager();
David Ahernad9def72013-08-07 22:50:44 -04001520
1521 /* save session -- references to threads are held in work_list */
1522 if (perf_sched__read_events(sched, &session))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001523 return -1;
David Ahernad9def72013-08-07 22:50:44 -04001524
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001525 perf_sched__sort_lat(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001526
Ramkumar Ramachandra80790e02014-03-17 10:18:21 -04001527 printf("\n -----------------------------------------------------------------------------------------------------------------\n");
1528 printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n");
1529 printf(" -----------------------------------------------------------------------------------------------------------------\n");
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001530
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001531 next = rb_first(&sched->sorted_atom_root);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001532
1533 while (next) {
1534 struct work_atoms *work_list;
1535
1536 work_list = rb_entry(next, struct work_atoms, node);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001537 output_lat_thread(sched, work_list);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001538 next = rb_next(next);
1539 }
1540
Ramkumar Ramachandra80790e02014-03-17 10:18:21 -04001541 printf(" -----------------------------------------------------------------------------------------------------------------\n");
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -02001542 printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001543 (double)sched->all_runtime / 1e6, sched->all_count);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001544
1545 printf(" ---------------------------------------------------\n");
1546
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001547 print_bad_events(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001548 printf("\n");
1549
Jiri Olsa4c09baf2011-08-08 23:03:34 +02001550 perf_session__delete(session);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001551 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001552}
1553
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001554static int perf_sched__map(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001555{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001556 sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF);
Ingo Molnar40749d02009-09-17 18:24:55 +02001557
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001558 setup_pager();
David Ahernad9def72013-08-07 22:50:44 -04001559 if (perf_sched__read_events(sched, NULL))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001560 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001561 print_bad_events(sched);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001562 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001563}
1564
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001565static int perf_sched__replay(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001566{
1567 unsigned long i;
1568
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001569 calibrate_run_measurement_overhead(sched);
1570 calibrate_sleep_measurement_overhead(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001571
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001572 test_calibrations(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001573
David Ahernad9def72013-08-07 22:50:44 -04001574 if (perf_sched__read_events(sched, NULL))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001575 return -1;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001576
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001577 printf("nr_run_events: %ld\n", sched->nr_run_events);
1578 printf("nr_sleep_events: %ld\n", sched->nr_sleep_events);
1579 printf("nr_wakeup_events: %ld\n", sched->nr_wakeup_events);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001580
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001581 if (sched->targetless_wakeups)
1582 printf("target-less wakeups: %ld\n", sched->targetless_wakeups);
1583 if (sched->multitarget_wakeups)
1584 printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups);
1585 if (sched->nr_run_events_optimized)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001586 printf("run atoms optimized: %ld\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001587 sched->nr_run_events_optimized);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001588
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001589 print_task_traces(sched);
1590 add_cross_task_wakeups(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001591
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001592 create_tasks(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001593 printf("------------------------------------------------------------\n");
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001594 for (i = 0; i < sched->replay_repeat; i++)
1595 run_one_test(sched);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001596
1597 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001598}
1599
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001600static void setup_sorting(struct perf_sched *sched, const struct option *options,
1601 const char * const usage_msg[])
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001602{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001603 char *tmp, *tok, *str = strdup(sched->sort_order);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001604
1605 for (tok = strtok_r(str, ", ", &tmp);
1606 tok; tok = strtok_r(NULL, ", ", &tmp)) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001607 if (sort_dimension__add(tok, &sched->sort_list) < 0) {
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001608 error("Unknown --sort key: `%s'", tok);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001609 usage_with_options(usage_msg, options);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001610 }
1611 }
1612
1613 free(str);
1614
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001615 sort_dimension__add("pid", &sched->cmp_pid);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001616}
1617
Ingo Molnar1fc35b22009-09-13 09:44:29 +02001618static int __cmd_record(int argc, const char **argv)
1619{
1620 unsigned int rec_argc, i, j;
1621 const char **rec_argv;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001622 const char * const record_args[] = {
1623 "record",
1624 "-a",
1625 "-R",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001626 "-m", "1024",
1627 "-c", "1",
1628 "-e", "sched:sched_switch",
1629 "-e", "sched:sched_stat_wait",
1630 "-e", "sched:sched_stat_sleep",
1631 "-e", "sched:sched_stat_iowait",
1632 "-e", "sched:sched_stat_runtime",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001633 "-e", "sched:sched_process_fork",
1634 "-e", "sched:sched_wakeup",
Dongsheng7fff9592014-05-05 16:05:53 +09001635 "-e", "sched:sched_wakeup_new",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001636 "-e", "sched:sched_migrate_task",
1637 };
Ingo Molnar1fc35b22009-09-13 09:44:29 +02001638
1639 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1640 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1641
Arnaldo Carvalho de Meloe462dc52011-01-10 10:48:47 -02001642 if (rec_argv == NULL)
Chris Samuelce47dc52010-11-13 13:35:06 +11001643 return -ENOMEM;
1644
Ingo Molnar1fc35b22009-09-13 09:44:29 +02001645 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1646 rec_argv[i] = strdup(record_args[i]);
1647
1648 for (j = 1; j < (unsigned int)argc; j++, i++)
1649 rec_argv[i] = argv[j];
1650
1651 BUG_ON(i != rec_argc);
1652
1653 return cmd_record(i, rec_argv, NULL);
1654}
1655
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001656int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001657{
Adrian Hunter8a39df82013-10-22 10:34:15 +03001658 const char default_sort_order[] = "avg, max, switch, runtime";
1659 struct perf_sched sched = {
1660 .tool = {
1661 .sample = perf_sched__process_tracepoint_sample,
1662 .comm = perf_event__process_comm,
1663 .lost = perf_event__process_lost,
1664 .fork = perf_sched__process_fork_event,
1665 .ordered_samples = true,
1666 },
1667 .cmp_pid = LIST_HEAD_INIT(sched.cmp_pid),
1668 .sort_list = LIST_HEAD_INIT(sched.sort_list),
1669 .start_work_mutex = PTHREAD_MUTEX_INITIALIZER,
1670 .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER,
Adrian Hunter8a39df82013-10-22 10:34:15 +03001671 .sort_order = default_sort_order,
1672 .replay_repeat = 10,
1673 .profile_cpu = -1,
1674 .next_shortname1 = 'A',
1675 .next_shortname2 = '0',
1676 };
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001677 const struct option latency_options[] = {
1678 OPT_STRING('s', "sort", &sched.sort_order, "key[,key2...]",
1679 "sort by key(s): runtime, switch, avg, max"),
1680 OPT_INCR('v', "verbose", &verbose,
1681 "be more verbose (show symbol address, etc)"),
1682 OPT_INTEGER('C', "CPU", &sched.profile_cpu,
1683 "CPU to profile on"),
1684 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1685 "dump raw trace in ASCII"),
1686 OPT_END()
1687 };
1688 const struct option replay_options[] = {
1689 OPT_UINTEGER('r', "repeat", &sched.replay_repeat,
1690 "repeat the workload replay N times (-1: infinite)"),
1691 OPT_INCR('v', "verbose", &verbose,
1692 "be more verbose (show symbol address, etc)"),
1693 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1694 "dump raw trace in ASCII"),
1695 OPT_END()
1696 };
1697 const struct option sched_options[] = {
Feng Tang70cb4e92012-10-30 11:56:02 +08001698 OPT_STRING('i', "input", &input_name, "file",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001699 "input file name"),
1700 OPT_INCR('v', "verbose", &verbose,
1701 "be more verbose (show symbol address, etc)"),
1702 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
1703 "dump raw trace in ASCII"),
1704 OPT_END()
1705 };
1706 const char * const latency_usage[] = {
1707 "perf sched latency [<options>]",
1708 NULL
1709 };
1710 const char * const replay_usage[] = {
1711 "perf sched replay [<options>]",
1712 NULL
1713 };
Ramkumar Ramachandraa83edb22014-03-14 23:17:54 -04001714 const char *const sched_subcommands[] = { "record", "latency", "map",
1715 "replay", "script", NULL };
1716 const char *sched_usage[] = {
1717 NULL,
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001718 NULL
1719 };
1720 struct trace_sched_handler lat_ops = {
1721 .wakeup_event = latency_wakeup_event,
1722 .switch_event = latency_switch_event,
1723 .runtime_event = latency_runtime_event,
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001724 .migrate_task_event = latency_migrate_task_event,
1725 };
1726 struct trace_sched_handler map_ops = {
1727 .switch_event = map_switch_event,
1728 };
1729 struct trace_sched_handler replay_ops = {
1730 .wakeup_event = replay_wakeup_event,
1731 .switch_event = replay_switch_event,
1732 .fork_event = replay_fork_event,
1733 };
Adrian Hunter156a2b02013-10-22 10:34:16 +03001734 unsigned int i;
1735
1736 for (i = 0; i < ARRAY_SIZE(sched.curr_pid); i++)
1737 sched.curr_pid[i] = -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001738
Ramkumar Ramachandraa83edb22014-03-14 23:17:54 -04001739 argc = parse_options_subcommand(argc, argv, sched_options, sched_subcommands,
1740 sched_usage, PARSE_OPT_STOP_AT_NON_OPTION);
Ingo Molnarf2858d82009-09-11 12:12:54 +02001741 if (!argc)
1742 usage_with_options(sched_usage, sched_options);
1743
Xiao Guangrongc0777c52009-12-07 12:04:49 +08001744 /*
Ingo Molnar133dc4c2010-11-16 18:45:39 +01001745 * Aliased to 'perf script' for now:
Xiao Guangrongc0777c52009-12-07 12:04:49 +08001746 */
Ingo Molnar133dc4c2010-11-16 18:45:39 +01001747 if (!strcmp(argv[0], "script"))
1748 return cmd_script(argc, argv, prefix);
Xiao Guangrongc0777c52009-12-07 12:04:49 +08001749
Arnaldo Carvalho de Melo75be6cf2009-12-15 20:04:39 -02001750 symbol__init();
Ingo Molnar1fc35b22009-09-13 09:44:29 +02001751 if (!strncmp(argv[0], "rec", 3)) {
1752 return __cmd_record(argc, argv);
1753 } else if (!strncmp(argv[0], "lat", 3)) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001754 sched.tp_handler = &lat_ops;
Ingo Molnarf2858d82009-09-11 12:12:54 +02001755 if (argc > 1) {
1756 argc = parse_options(argc, argv, latency_options, latency_usage, 0);
1757 if (argc)
1758 usage_with_options(latency_usage, latency_options);
Ingo Molnarf2858d82009-09-11 12:12:54 +02001759 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001760 setup_sorting(&sched, latency_options, latency_usage);
1761 return perf_sched__lat(&sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001762 } else if (!strcmp(argv[0], "map")) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001763 sched.tp_handler = &map_ops;
1764 setup_sorting(&sched, latency_options, latency_usage);
1765 return perf_sched__map(&sched);
Ingo Molnarf2858d82009-09-11 12:12:54 +02001766 } else if (!strncmp(argv[0], "rep", 3)) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001767 sched.tp_handler = &replay_ops;
Ingo Molnarf2858d82009-09-11 12:12:54 +02001768 if (argc) {
1769 argc = parse_options(argc, argv, replay_options, replay_usage, 0);
1770 if (argc)
1771 usage_with_options(replay_usage, replay_options);
1772 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001773 return perf_sched__replay(&sched);
Ingo Molnarf2858d82009-09-11 12:12:54 +02001774 } else {
1775 usage_with_options(sched_usage, sched_options);
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001776 }
1777
Ingo Molnarec156762009-09-11 12:12:54 +02001778 return 0;
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001779}