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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"
Ingo Molnar0a02ad92009-09-11 12:12:54 +020013
14#include "util/parse-options.h"
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020015#include "util/trace-event.h"
Ingo Molnar0a02ad92009-09-11 12:12:54 +020016
Ingo Molnar0a02ad92009-09-11 12:12:54 +020017#include "util/debug.h"
18
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020019#include <sys/prctl.h>
Markus Trippelsdorf7b78f132012-04-04 10:45:27 +020020#include <sys/resource.h>
Ingo Molnar0a02ad92009-09-11 12:12:54 +020021
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020022#include <semaphore.h>
23#include <pthread.h>
24#include <math.h>
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +020025
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020026#define PR_SET_NAME 15 /* Set process name */
27#define MAX_CPUS 4096
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020028#define COMM_LEN 20
29#define SYM_LEN 129
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020030#define MAX_PID 65536
Ingo Molnarec156762009-09-11 12:12:54 +020031
mingo39aeb522009-09-14 20:04:48 +020032struct sched_atom;
Ingo Molnarec156762009-09-11 12:12:54 +020033
34struct task_desc {
35 unsigned long nr;
36 unsigned long pid;
37 char comm[COMM_LEN];
38
39 unsigned long nr_events;
40 unsigned long curr_event;
mingo39aeb522009-09-14 20:04:48 +020041 struct sched_atom **atoms;
Ingo Molnarec156762009-09-11 12:12:54 +020042
43 pthread_t thread;
44 sem_t sleep_sem;
45
46 sem_t ready_for_work;
47 sem_t work_done_sem;
48
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020049 u64 cpu_usage;
Ingo Molnarec156762009-09-11 12:12:54 +020050};
51
52enum sched_event_type {
53 SCHED_EVENT_RUN,
54 SCHED_EVENT_SLEEP,
55 SCHED_EVENT_WAKEUP,
Mike Galbraith55ffb7a2009-10-10 14:46:04 +020056 SCHED_EVENT_MIGRATION,
Ingo Molnarec156762009-09-11 12:12:54 +020057};
58
mingo39aeb522009-09-14 20:04:48 +020059struct sched_atom {
Ingo Molnarec156762009-09-11 12:12:54 +020060 enum sched_event_type type;
Arnaldo Carvalho de Meloeed05fe2010-04-05 12:53:45 -030061 int specific_wait;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020062 u64 timestamp;
63 u64 duration;
Ingo Molnarec156762009-09-11 12:12:54 +020064 unsigned long nr;
Ingo Molnarec156762009-09-11 12:12:54 +020065 sem_t *wait_sem;
66 struct task_desc *wakee;
67};
68
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020069#define TASK_STATE_TO_CHAR_STR "RSDTtZX"
70
71enum thread_state {
72 THREAD_SLEEPING = 0,
73 THREAD_WAIT_CPU,
74 THREAD_SCHED_IN,
75 THREAD_IGNORE
76};
77
78struct work_atom {
79 struct list_head list;
80 enum thread_state state;
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +020081 u64 sched_out_time;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020082 u64 wake_up_time;
83 u64 sched_in_time;
84 u64 runtime;
85};
86
mingo39aeb522009-09-14 20:04:48 +020087struct work_atoms {
88 struct list_head work_list;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020089 struct thread *thread;
90 struct rb_node node;
91 u64 max_lat;
Frederic Weisbecker3786310a2009-12-09 21:40:08 +010092 u64 max_lat_at;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020093 u64 total_lat;
94 u64 nb_atoms;
95 u64 total_runtime;
96};
97
mingo39aeb522009-09-14 20:04:48 +020098typedef int (*sort_fn_t)(struct work_atoms *, struct work_atoms *);
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +020099
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300100struct perf_sched;
101
102struct trace_sched_handler {
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300103 int (*switch_event)(struct perf_sched *sched, struct perf_evsel *evsel,
104 struct perf_sample *sample, struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300105
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300106 int (*runtime_event)(struct perf_sched *sched, struct perf_evsel *evsel,
107 struct perf_sample *sample, struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300108
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300109 int (*wakeup_event)(struct perf_sched *sched, struct perf_evsel *evsel,
110 struct perf_sample *sample, struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300111
David Aherncb627502013-08-07 22:50:47 -0400112 /* PERF_RECORD_FORK event, not sched_process_fork tracepoint */
113 int (*fork_event)(struct perf_sched *sched, union perf_event *event,
114 struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300115
116 int (*migrate_task_event)(struct perf_sched *sched,
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300117 struct perf_evsel *evsel,
118 struct perf_sample *sample,
119 struct machine *machine);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300120};
121
122struct perf_sched {
123 struct perf_tool tool;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300124 const char *sort_order;
125 unsigned long nr_tasks;
126 struct task_desc *pid_to_task[MAX_PID];
127 struct task_desc **tasks;
128 const struct trace_sched_handler *tp_handler;
129 pthread_mutex_t start_work_mutex;
130 pthread_mutex_t work_done_wait_mutex;
131 int profile_cpu;
132/*
133 * Track the current task - that way we can know whether there's any
134 * weird events, such as a task being switched away that is not current.
135 */
136 int max_cpu;
137 u32 curr_pid[MAX_CPUS];
138 struct thread *curr_thread[MAX_CPUS];
139 char next_shortname1;
140 char next_shortname2;
141 unsigned int replay_repeat;
142 unsigned long nr_run_events;
143 unsigned long nr_sleep_events;
144 unsigned long nr_wakeup_events;
145 unsigned long nr_sleep_corrections;
146 unsigned long nr_run_events_optimized;
147 unsigned long targetless_wakeups;
148 unsigned long multitarget_wakeups;
149 unsigned long nr_runs;
150 unsigned long nr_timestamps;
151 unsigned long nr_unordered_timestamps;
152 unsigned long nr_state_machine_bugs;
153 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
438 fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
439
440 if (fd < 0)
Namhyung Kim60b7d142012-09-12 11:11:06 +0900441 pr_err("Error: sys_perf_event_open() syscall returned "
442 "with %d (%s)\n", fd, strerror(errno));
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800443 return fd;
444}
445
446static u64 get_cpu_usage_nsec_self(int fd)
447{
448 u64 runtime;
Ingo Molnarec156762009-09-11 12:12:54 +0200449 int ret;
450
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800451 ret = read(fd, &runtime, sizeof(runtime));
452 BUG_ON(ret != sizeof(runtime));
Ingo Molnarec156762009-09-11 12:12:54 +0200453
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800454 return runtime;
Ingo Molnarec156762009-09-11 12:12:54 +0200455}
456
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300457struct sched_thread_parms {
458 struct task_desc *task;
459 struct perf_sched *sched;
460};
461
Ingo Molnarec156762009-09-11 12:12:54 +0200462static void *thread_func(void *ctx)
463{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300464 struct sched_thread_parms *parms = ctx;
465 struct task_desc *this_task = parms->task;
466 struct perf_sched *sched = parms->sched;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200467 u64 cpu_usage_0, cpu_usage_1;
Ingo Molnarec156762009-09-11 12:12:54 +0200468 unsigned long i, ret;
469 char comm2[22];
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800470 int fd;
Ingo Molnarec156762009-09-11 12:12:54 +0200471
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300472 free(parms);
473
Ingo Molnarec156762009-09-11 12:12:54 +0200474 sprintf(comm2, ":%s", this_task->comm);
475 prctl(PR_SET_NAME, comm2);
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800476 fd = self_open_counters();
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300477 if (fd < 0)
478 return NULL;
Ingo Molnarec156762009-09-11 12:12:54 +0200479again:
480 ret = sem_post(&this_task->ready_for_work);
481 BUG_ON(ret);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300482 ret = pthread_mutex_lock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200483 BUG_ON(ret);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300484 ret = pthread_mutex_unlock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200485 BUG_ON(ret);
Ingo Molnarec156762009-09-11 12:12:54 +0200486
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800487 cpu_usage_0 = get_cpu_usage_nsec_self(fd);
Ingo Molnarec156762009-09-11 12:12:54 +0200488
489 for (i = 0; i < this_task->nr_events; i++) {
490 this_task->curr_event = i;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300491 perf_sched__process_event(sched, this_task->atoms[i]);
Ingo Molnarec156762009-09-11 12:12:54 +0200492 }
493
Xiao Guangrongc0c9e722009-12-09 17:51:30 +0800494 cpu_usage_1 = get_cpu_usage_nsec_self(fd);
Ingo Molnarec156762009-09-11 12:12:54 +0200495 this_task->cpu_usage = cpu_usage_1 - cpu_usage_0;
Ingo Molnarec156762009-09-11 12:12:54 +0200496 ret = sem_post(&this_task->work_done_sem);
497 BUG_ON(ret);
Ingo Molnarec156762009-09-11 12:12:54 +0200498
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300499 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200500 BUG_ON(ret);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300501 ret = pthread_mutex_unlock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200502 BUG_ON(ret);
Ingo Molnarec156762009-09-11 12:12:54 +0200503
504 goto again;
505}
506
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300507static void create_tasks(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200508{
509 struct task_desc *task;
510 pthread_attr_t attr;
511 unsigned long i;
512 int err;
513
514 err = pthread_attr_init(&attr);
515 BUG_ON(err);
Jiri Pirko12f7e032011-01-10 14:14:23 -0200516 err = pthread_attr_setstacksize(&attr,
517 (size_t) max(16 * 1024, PTHREAD_STACK_MIN));
Ingo Molnarec156762009-09-11 12:12:54 +0200518 BUG_ON(err);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300519 err = pthread_mutex_lock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200520 BUG_ON(err);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300521 err = pthread_mutex_lock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200522 BUG_ON(err);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300523 for (i = 0; i < sched->nr_tasks; i++) {
524 struct sched_thread_parms *parms = malloc(sizeof(*parms));
525 BUG_ON(parms == NULL);
526 parms->task = task = sched->tasks[i];
527 parms->sched = sched;
Ingo Molnarec156762009-09-11 12:12:54 +0200528 sem_init(&task->sleep_sem, 0, 0);
529 sem_init(&task->ready_for_work, 0, 0);
530 sem_init(&task->work_done_sem, 0, 0);
531 task->curr_event = 0;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300532 err = pthread_create(&task->thread, &attr, thread_func, parms);
Ingo Molnarec156762009-09-11 12:12:54 +0200533 BUG_ON(err);
534 }
535}
536
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300537static void wait_for_tasks(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200538{
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200539 u64 cpu_usage_0, cpu_usage_1;
Ingo Molnarec156762009-09-11 12:12:54 +0200540 struct task_desc *task;
541 unsigned long i, ret;
542
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300543 sched->start_time = get_nsecs();
544 sched->cpu_usage = 0;
545 pthread_mutex_unlock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200546
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300547 for (i = 0; i < sched->nr_tasks; i++) {
548 task = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200549 ret = sem_wait(&task->ready_for_work);
550 BUG_ON(ret);
551 sem_init(&task->ready_for_work, 0, 0);
552 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300553 ret = pthread_mutex_lock(&sched->work_done_wait_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200554 BUG_ON(ret);
555
556 cpu_usage_0 = get_cpu_usage_nsec_parent();
557
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300558 pthread_mutex_unlock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200559
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300560 for (i = 0; i < sched->nr_tasks; i++) {
561 task = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200562 ret = sem_wait(&task->work_done_sem);
563 BUG_ON(ret);
564 sem_init(&task->work_done_sem, 0, 0);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300565 sched->cpu_usage += task->cpu_usage;
Ingo Molnarec156762009-09-11 12:12:54 +0200566 task->cpu_usage = 0;
567 }
568
569 cpu_usage_1 = get_cpu_usage_nsec_parent();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300570 if (!sched->runavg_cpu_usage)
571 sched->runavg_cpu_usage = sched->cpu_usage;
572 sched->runavg_cpu_usage = (sched->runavg_cpu_usage * 9 + sched->cpu_usage) / 10;
Ingo Molnarec156762009-09-11 12:12:54 +0200573
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300574 sched->parent_cpu_usage = cpu_usage_1 - cpu_usage_0;
575 if (!sched->runavg_parent_cpu_usage)
576 sched->runavg_parent_cpu_usage = sched->parent_cpu_usage;
577 sched->runavg_parent_cpu_usage = (sched->runavg_parent_cpu_usage * 9 +
578 sched->parent_cpu_usage)/10;
Ingo Molnarec156762009-09-11 12:12:54 +0200579
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300580 ret = pthread_mutex_lock(&sched->start_work_mutex);
Ingo Molnarec156762009-09-11 12:12:54 +0200581 BUG_ON(ret);
582
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300583 for (i = 0; i < sched->nr_tasks; i++) {
584 task = sched->tasks[i];
Ingo Molnarec156762009-09-11 12:12:54 +0200585 sem_init(&task->sleep_sem, 0, 0);
586 task->curr_event = 0;
587 }
588}
589
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300590static void run_one_test(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200591{
Kyle McMartinfb7d0b32011-01-24 11:13:04 -0500592 u64 T0, T1, delta, avg_delta, fluct;
Ingo Molnarec156762009-09-11 12:12:54 +0200593
594 T0 = get_nsecs();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300595 wait_for_tasks(sched);
Ingo Molnarec156762009-09-11 12:12:54 +0200596 T1 = get_nsecs();
597
598 delta = T1 - T0;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300599 sched->sum_runtime += delta;
600 sched->nr_runs++;
Ingo Molnarec156762009-09-11 12:12:54 +0200601
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300602 avg_delta = sched->sum_runtime / sched->nr_runs;
Ingo Molnarec156762009-09-11 12:12:54 +0200603 if (delta < avg_delta)
604 fluct = avg_delta - delta;
605 else
606 fluct = delta - avg_delta;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300607 sched->sum_fluct += fluct;
608 if (!sched->run_avg)
609 sched->run_avg = delta;
610 sched->run_avg = (sched->run_avg * 9 + delta) / 10;
Ingo Molnarec156762009-09-11 12:12:54 +0200611
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300612 printf("#%-3ld: %0.3f, ", sched->nr_runs, (double)delta / 1000000.0);
Ingo Molnarec156762009-09-11 12:12:54 +0200613
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300614 printf("ravg: %0.2f, ", (double)sched->run_avg / 1e6);
Ingo Molnarec156762009-09-11 12:12:54 +0200615
Ingo Molnarad236fd2009-09-11 12:12:54 +0200616 printf("cpu: %0.2f / %0.2f",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300617 (double)sched->cpu_usage / 1e6, (double)sched->runavg_cpu_usage / 1e6);
Ingo Molnarec156762009-09-11 12:12:54 +0200618
619#if 0
620 /*
Ingo Molnarfbf94822009-09-11 12:12:54 +0200621 * rusage statistics done by the parent, these are less
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300622 * accurate than the sched->sum_exec_runtime based statistics:
Ingo Molnarfbf94822009-09-11 12:12:54 +0200623 */
Ingo Molnarad236fd2009-09-11 12:12:54 +0200624 printf(" [%0.2f / %0.2f]",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300625 (double)sched->parent_cpu_usage/1e6,
626 (double)sched->runavg_parent_cpu_usage/1e6);
Ingo Molnarec156762009-09-11 12:12:54 +0200627#endif
628
Ingo Molnarad236fd2009-09-11 12:12:54 +0200629 printf("\n");
Ingo Molnarec156762009-09-11 12:12:54 +0200630
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300631 if (sched->nr_sleep_corrections)
632 printf(" (%ld sleep corrections)\n", sched->nr_sleep_corrections);
633 sched->nr_sleep_corrections = 0;
Ingo Molnarec156762009-09-11 12:12:54 +0200634}
635
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300636static void test_calibrations(struct perf_sched *sched)
Ingo Molnarec156762009-09-11 12:12:54 +0200637{
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200638 u64 T0, T1;
Ingo Molnarec156762009-09-11 12:12:54 +0200639
640 T0 = get_nsecs();
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300641 burn_nsecs(sched, 1e6);
Ingo Molnarec156762009-09-11 12:12:54 +0200642 T1 = get_nsecs();
643
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200644 printf("the run test took %" PRIu64 " nsecs\n", T1 - T0);
Ingo Molnarec156762009-09-11 12:12:54 +0200645
646 T0 = get_nsecs();
647 sleep_nsecs(1e6);
648 T1 = get_nsecs();
649
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -0200650 printf("the sleep test took %" PRIu64 " nsecs\n", T1 - T0);
Ingo Molnarec156762009-09-11 12:12:54 +0200651}
652
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300653static int
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300654replay_wakeup_event(struct perf_sched *sched,
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300655 struct perf_evsel *evsel, struct perf_sample *sample,
656 struct machine *machine __maybe_unused)
Ingo Molnarec156762009-09-11 12:12:54 +0200657{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300658 const char *comm = perf_evsel__strval(evsel, sample, "comm");
659 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200660 struct task_desc *waker, *wakee;
661
662 if (verbose) {
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -0300663 printf("sched_wakeup event %p\n", evsel);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200664
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300665 printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200666 }
667
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -0300668 waker = register_pid(sched, sample->tid, "<unknown>");
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300669 wakee = register_pid(sched, pid, comm);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200670
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300671 add_sched_event_wakeup(sched, waker, sample->time, wakee);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300672 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200673}
674
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300675static int replay_switch_event(struct perf_sched *sched,
676 struct perf_evsel *evsel,
677 struct perf_sample *sample,
678 struct machine *machine __maybe_unused)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200679{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300680 const char *prev_comm = perf_evsel__strval(evsel, sample, "prev_comm"),
681 *next_comm = perf_evsel__strval(evsel, sample, "next_comm");
682 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
683 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
684 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
Irina Tirdea1d037ca2012-09-11 01:15:03 +0300685 struct task_desc *prev, __maybe_unused *next;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -0300686 u64 timestamp0, timestamp = sample->time;
687 int cpu = sample->cpu;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200688 s64 delta;
689
Ingo Molnarad236fd2009-09-11 12:12:54 +0200690 if (verbose)
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -0300691 printf("sched_switch event %p\n", evsel);
Ingo Molnarad236fd2009-09-11 12:12:54 +0200692
Ingo Molnarfbf94822009-09-11 12:12:54 +0200693 if (cpu >= MAX_CPUS || cpu < 0)
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300694 return 0;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200695
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300696 timestamp0 = sched->cpu_last_switched[cpu];
Ingo Molnarfbf94822009-09-11 12:12:54 +0200697 if (timestamp0)
698 delta = timestamp - timestamp0;
699 else
700 delta = 0;
701
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300702 if (delta < 0) {
Namhyung Kim60b7d142012-09-12 11:11:06 +0900703 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300704 return -1;
705 }
Ingo Molnarfbf94822009-09-11 12:12:54 +0200706
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300707 pr_debug(" ... switch from %s/%d to %s/%d [ran %" PRIu64 " nsecs]\n",
708 prev_comm, prev_pid, next_comm, next_pid, delta);
Ingo Molnarfbf94822009-09-11 12:12:54 +0200709
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300710 prev = register_pid(sched, prev_pid, prev_comm);
711 next = register_pid(sched, next_pid, next_comm);
Ingo Molnarfbf94822009-09-11 12:12:54 +0200712
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300713 sched->cpu_last_switched[cpu] = timestamp;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200714
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300715 add_sched_event_run(sched, prev, timestamp, delta);
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300716 add_sched_event_sleep(sched, prev, timestamp, prev_state);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300717
718 return 0;
Ingo Molnarfbf94822009-09-11 12:12:54 +0200719}
720
David Aherncb627502013-08-07 22:50:47 -0400721static int replay_fork_event(struct perf_sched *sched,
722 union perf_event *event,
723 struct machine *machine)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200724{
David Aherncb627502013-08-07 22:50:47 -0400725 struct thread *child, *parent;
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300726
Adrian Hunter314add62013-08-27 11:23:03 +0300727 child = machine__findnew_thread(machine, event->fork.pid,
728 event->fork.tid);
729 parent = machine__findnew_thread(machine, event->fork.ppid,
730 event->fork.ptid);
David Aherncb627502013-08-07 22:50:47 -0400731
732 if (child == NULL || parent == NULL) {
733 pr_debug("thread does not exist on fork event: child %p, parent %p\n",
734 child, parent);
735 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200736 }
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300737
David Aherncb627502013-08-07 22:50:47 -0400738 if (verbose) {
739 printf("fork event\n");
740 printf("... parent: %s/%d\n", parent->comm, parent->tid);
741 printf("... child: %s/%d\n", child->comm, child->tid);
742 }
743
744 register_pid(sched, parent->tid, parent->comm);
745 register_pid(sched, child->tid, child->comm);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300746 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +0200747}
748
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200749struct sort_dimension {
750 const char *name;
Ingo Molnarb5fae122009-09-11 12:12:54 +0200751 sort_fn_t cmp;
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200752 struct list_head list;
753};
754
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200755static int
mingo39aeb522009-09-14 20:04:48 +0200756thread_lat_cmp(struct list_head *list, struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200757{
758 struct sort_dimension *sort;
759 int ret = 0;
760
Ingo Molnarb5fae122009-09-11 12:12:54 +0200761 BUG_ON(list_empty(list));
762
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200763 list_for_each_entry(sort, list, list) {
764 ret = sort->cmp(l, r);
765 if (ret)
766 return ret;
767 }
768
769 return ret;
770}
771
mingo39aeb522009-09-14 20:04:48 +0200772static struct work_atoms *
Ingo Molnarb5fae122009-09-11 12:12:54 +0200773thread_atoms_search(struct rb_root *root, struct thread *thread,
774 struct list_head *sort_list)
775{
776 struct rb_node *node = root->rb_node;
mingo39aeb522009-09-14 20:04:48 +0200777 struct work_atoms key = { .thread = thread };
Ingo Molnarb5fae122009-09-11 12:12:54 +0200778
779 while (node) {
mingo39aeb522009-09-14 20:04:48 +0200780 struct work_atoms *atoms;
Ingo Molnarb5fae122009-09-11 12:12:54 +0200781 int cmp;
782
mingo39aeb522009-09-14 20:04:48 +0200783 atoms = container_of(node, struct work_atoms, node);
Ingo Molnarb5fae122009-09-11 12:12:54 +0200784
785 cmp = thread_lat_cmp(sort_list, &key, atoms);
786 if (cmp > 0)
787 node = node->rb_left;
788 else if (cmp < 0)
789 node = node->rb_right;
790 else {
791 BUG_ON(thread != atoms->thread);
792 return atoms;
793 }
794 }
795 return NULL;
796}
797
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200798static void
mingo39aeb522009-09-14 20:04:48 +0200799__thread_latency_insert(struct rb_root *root, struct work_atoms *data,
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200800 struct list_head *sort_list)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200801{
802 struct rb_node **new = &(root->rb_node), *parent = NULL;
803
804 while (*new) {
mingo39aeb522009-09-14 20:04:48 +0200805 struct work_atoms *this;
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200806 int cmp;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200807
mingo39aeb522009-09-14 20:04:48 +0200808 this = container_of(*new, struct work_atoms, node);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200809 parent = *new;
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200810
811 cmp = thread_lat_cmp(sort_list, data, this);
812
813 if (cmp > 0)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200814 new = &((*new)->rb_left);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200815 else
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +0200816 new = &((*new)->rb_right);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200817 }
818
819 rb_link_node(&data->node, parent, new);
820 rb_insert_color(&data->node, root);
821}
822
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300823static int thread_atoms_insert(struct perf_sched *sched, struct thread *thread)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200824{
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200825 struct work_atoms *atoms = zalloc(sizeof(*atoms));
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300826 if (!atoms) {
827 pr_err("No memory at %s\n", __func__);
828 return -1;
829 }
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200830
Frederic Weisbecker17562202009-09-12 23:11:32 +0200831 atoms->thread = thread;
mingo39aeb522009-09-14 20:04:48 +0200832 INIT_LIST_HEAD(&atoms->work_list);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300833 __thread_latency_insert(&sched->atom_root, atoms, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300834 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200835}
836
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300837static char sched_out_state(u64 prev_state)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200838{
839 const char *str = TASK_STATE_TO_CHAR_STR;
840
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300841 return str[prev_state];
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200842}
843
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300844static int
mingo39aeb522009-09-14 20:04:48 +0200845add_sched_out_event(struct work_atoms *atoms,
846 char run_state,
847 u64 timestamp)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200848{
Arnaldo Carvalho de Melo36479482009-11-24 12:05:16 -0200849 struct work_atom *atom = zalloc(sizeof(*atom));
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300850 if (!atom) {
851 pr_err("Non memory at %s", __func__);
852 return -1;
853 }
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200854
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +0200855 atom->sched_out_time = timestamp;
856
mingo39aeb522009-09-14 20:04:48 +0200857 if (run_state == 'R') {
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200858 atom->state = THREAD_WAIT_CPU;
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +0200859 atom->wake_up_time = atom->sched_out_time;
Frederic Weisbeckerc6ced612009-09-13 00:46:19 +0200860 }
861
mingo39aeb522009-09-14 20:04:48 +0200862 list_add_tail(&atom->list, &atoms->work_list);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300863 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200864}
865
866static void
Irina Tirdea1d037ca2012-09-11 01:15:03 +0300867add_runtime_event(struct work_atoms *atoms, u64 delta,
868 u64 timestamp __maybe_unused)
mingo39aeb522009-09-14 20:04:48 +0200869{
870 struct work_atom *atom;
871
872 BUG_ON(list_empty(&atoms->work_list));
873
874 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
875
876 atom->runtime += delta;
877 atoms->total_runtime += delta;
878}
879
880static void
881add_sched_in_event(struct work_atoms *atoms, u64 timestamp)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200882{
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200883 struct work_atom *atom;
Frederic Weisbecker66685672009-09-13 01:56:25 +0200884 u64 delta;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200885
mingo39aeb522009-09-14 20:04:48 +0200886 if (list_empty(&atoms->work_list))
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200887 return;
888
mingo39aeb522009-09-14 20:04:48 +0200889 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200890
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200891 if (atom->state != THREAD_WAIT_CPU)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200892 return;
893
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200894 if (timestamp < atom->wake_up_time) {
895 atom->state = THREAD_IGNORE;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200896 return;
897 }
898
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200899 atom->state = THREAD_SCHED_IN;
900 atom->sched_in_time = timestamp;
Frederic Weisbecker66685672009-09-13 01:56:25 +0200901
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +0200902 delta = atom->sched_in_time - atom->wake_up_time;
Frederic Weisbecker66685672009-09-13 01:56:25 +0200903 atoms->total_lat += delta;
Frederic Weisbecker3786310a2009-12-09 21:40:08 +0100904 if (delta > atoms->max_lat) {
Frederic Weisbecker66685672009-09-13 01:56:25 +0200905 atoms->max_lat = delta;
Frederic Weisbecker3786310a2009-12-09 21:40:08 +0100906 atoms->max_lat_at = timestamp;
907 }
Frederic Weisbecker66685672009-09-13 01:56:25 +0200908 atoms->nb_atoms++;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200909}
910
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300911static int latency_switch_event(struct perf_sched *sched,
912 struct perf_evsel *evsel,
913 struct perf_sample *sample,
914 struct machine *machine)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200915{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300916 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
917 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
918 const u64 prev_state = perf_evsel__intval(evsel, sample, "prev_state");
mingo39aeb522009-09-14 20:04:48 +0200919 struct work_atoms *out_events, *in_events;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200920 struct thread *sched_out, *sched_in;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -0300921 u64 timestamp0, timestamp = sample->time;
922 int cpu = sample->cpu;
Ingo Molnarea92ed52009-09-12 10:08:34 +0200923 s64 delta;
924
mingo39aeb522009-09-14 20:04:48 +0200925 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
Ingo Molnarea92ed52009-09-12 10:08:34 +0200926
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300927 timestamp0 = sched->cpu_last_switched[cpu];
928 sched->cpu_last_switched[cpu] = timestamp;
Ingo Molnarea92ed52009-09-12 10:08:34 +0200929 if (timestamp0)
930 delta = timestamp - timestamp0;
931 else
932 delta = 0;
933
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300934 if (delta < 0) {
935 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
936 return -1;
937 }
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200938
Adrian Hunter314add62013-08-27 11:23:03 +0300939 sched_out = machine__findnew_thread(machine, 0, prev_pid);
940 sched_in = machine__findnew_thread(machine, 0, next_pid);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200941
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300942 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
mingo39aeb522009-09-14 20:04:48 +0200943 if (!out_events) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300944 if (thread_atoms_insert(sched, sched_out))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300945 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300946 out_events = thread_atoms_search(&sched->atom_root, sched_out, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300947 if (!out_events) {
948 pr_err("out-event: Internal tree error");
949 return -1;
950 }
mingo39aeb522009-09-14 20:04:48 +0200951 }
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300952 if (add_sched_out_event(out_events, sched_out_state(prev_state), timestamp))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300953 return -1;
mingo39aeb522009-09-14 20:04:48 +0200954
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300955 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
mingo39aeb522009-09-14 20:04:48 +0200956 if (!in_events) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300957 if (thread_atoms_insert(sched, sched_in))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300958 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300959 in_events = thread_atoms_search(&sched->atom_root, sched_in, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300960 if (!in_events) {
961 pr_err("in-event: Internal tree error");
962 return -1;
963 }
mingo39aeb522009-09-14 20:04:48 +0200964 /*
965 * Take came in we have not heard about yet,
966 * add in an initial atom in runnable state:
967 */
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300968 if (add_sched_out_event(in_events, 'R', timestamp))
969 return -1;
mingo39aeb522009-09-14 20:04:48 +0200970 }
971 add_sched_in_event(in_events, timestamp);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300972
973 return 0;
mingo39aeb522009-09-14 20:04:48 +0200974}
975
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300976static int latency_runtime_event(struct perf_sched *sched,
977 struct perf_evsel *evsel,
978 struct perf_sample *sample,
979 struct machine *machine)
mingo39aeb522009-09-14 20:04:48 +0200980{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -0300981 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
982 const u64 runtime = perf_evsel__intval(evsel, sample, "runtime");
Adrian Hunter314add62013-08-27 11:23:03 +0300983 struct thread *thread = machine__findnew_thread(machine, 0, pid);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300984 struct work_atoms *atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -0300985 u64 timestamp = sample->time;
986 int cpu = sample->cpu;
mingo39aeb522009-09-14 20:04:48 +0200987
988 BUG_ON(cpu >= MAX_CPUS || cpu < 0);
mingo39aeb522009-09-14 20:04:48 +0200989 if (!atoms) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300990 if (thread_atoms_insert(sched, thread))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300991 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -0300992 atoms = thread_atoms_search(&sched->atom_root, thread, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300993 if (!atoms) {
Namhyung Kim60b7d142012-09-12 11:11:06 +0900994 pr_err("in-event: Internal tree error");
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -0300995 return -1;
996 }
997 if (add_sched_out_event(atoms, 'R', timestamp))
998 return -1;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +0200999 }
1000
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001001 add_runtime_event(atoms, runtime, timestamp);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001002 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001003}
1004
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001005static int latency_wakeup_event(struct perf_sched *sched,
1006 struct perf_evsel *evsel,
1007 struct perf_sample *sample,
1008 struct machine *machine)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001009{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001010 const u32 pid = perf_evsel__intval(evsel, sample, "pid"),
1011 success = perf_evsel__intval(evsel, sample, "success");
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
1017 /* Note for later, it may be interesting to observe the failing cases */
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001018 if (!success)
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001019 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001020
Adrian Hunter314add62013-08-27 11:23:03 +03001021 wakee = machine__findnew_thread(machine, 0, pid);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001022 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
Frederic Weisbecker17562202009-09-12 23:11:32 +02001023 if (!atoms) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001024 if (thread_atoms_insert(sched, wakee))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001025 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001026 atoms = thread_atoms_search(&sched->atom_root, wakee, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001027 if (!atoms) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001028 pr_err("wakeup-event: Internal tree error");
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001029 return -1;
1030 }
1031 if (add_sched_out_event(atoms, 'S', timestamp))
1032 return -1;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001033 }
1034
mingo39aeb522009-09-14 20:04:48 +02001035 BUG_ON(list_empty(&atoms->work_list));
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001036
mingo39aeb522009-09-14 20:04:48 +02001037 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001038
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001039 /*
1040 * You WILL be missing events if you've recorded only
1041 * one CPU, or are only looking at only one, so don't
1042 * make useless noise.
1043 */
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001044 if (sched->profile_cpu == -1 && atom->state != THREAD_SLEEPING)
1045 sched->nr_state_machine_bugs++;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001046
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001047 sched->nr_timestamps++;
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001048 if (atom->sched_out_time > timestamp) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001049 sched->nr_unordered_timestamps++;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001050 return 0;
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001051 }
Frederic Weisbeckeraa1ab9d2009-09-14 03:01:12 +02001052
Ingo Molnarb1ffe8f2009-09-11 12:12:54 +02001053 atom->state = THREAD_WAIT_CPU;
1054 atom->wake_up_time = timestamp;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001055 return 0;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001056}
1057
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001058static int latency_migrate_task_event(struct perf_sched *sched,
1059 struct perf_evsel *evsel,
1060 struct perf_sample *sample,
1061 struct machine *machine)
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001062{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001063 const u32 pid = perf_evsel__intval(evsel, sample, "pid");
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001064 u64 timestamp = sample->time;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001065 struct work_atoms *atoms;
1066 struct work_atom *atom;
1067 struct thread *migrant;
1068
1069 /*
1070 * Only need to worry about migration when profiling one CPU.
1071 */
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001072 if (sched->profile_cpu == -1)
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001073 return 0;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001074
Adrian Hunter314add62013-08-27 11:23:03 +03001075 migrant = machine__findnew_thread(machine, 0, pid);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001076 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001077 if (!atoms) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001078 if (thread_atoms_insert(sched, migrant))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001079 return -1;
Adrian Hunter38051232013-07-04 16:20:31 +03001080 register_pid(sched, migrant->tid, migrant->comm);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001081 atoms = thread_atoms_search(&sched->atom_root, migrant, &sched->cmp_pid);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001082 if (!atoms) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001083 pr_err("migration-event: Internal tree error");
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001084 return -1;
1085 }
1086 if (add_sched_out_event(atoms, 'R', timestamp))
1087 return -1;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001088 }
1089
1090 BUG_ON(list_empty(&atoms->work_list));
1091
1092 atom = list_entry(atoms->work_list.prev, struct work_atom, list);
1093 atom->sched_in_time = atom->sched_out_time = atom->wake_up_time = timestamp;
1094
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001095 sched->nr_timestamps++;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001096
1097 if (atom->sched_out_time > timestamp)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001098 sched->nr_unordered_timestamps++;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001099
1100 return 0;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001101}
1102
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001103static void output_lat_thread(struct perf_sched *sched, struct work_atoms *work_list)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001104{
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001105 int i;
1106 int ret;
Frederic Weisbecker66685672009-09-13 01:56:25 +02001107 u64 avg;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001108
mingo39aeb522009-09-14 20:04:48 +02001109 if (!work_list->nb_atoms)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001110 return;
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001111 /*
1112 * Ignore idle threads:
1113 */
Ingo Molnar80ed0982009-09-16 14:12:36 +02001114 if (!strcmp(work_list->thread->comm, "swapper"))
Ingo Molnarea57c4f2009-09-13 18:15:54 +02001115 return;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001116
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001117 sched->all_runtime += work_list->total_runtime;
1118 sched->all_count += work_list->nb_atoms;
Frederic Weisbecker66685672009-09-13 01:56:25 +02001119
Adrian Hunter38051232013-07-04 16:20:31 +03001120 ret = printf(" %s:%d ", work_list->thread->comm, work_list->thread->tid);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001121
mingo08f69e62009-09-14 18:30:44 +02001122 for (i = 0; i < 24 - ret; i++)
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001123 printf(" ");
1124
mingo39aeb522009-09-14 20:04:48 +02001125 avg = work_list->total_lat / work_list->nb_atoms;
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001126
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -02001127 printf("|%11.3f ms |%9" PRIu64 " | avg:%9.3f ms | max:%9.3f ms | max at: %9.6f s\n",
mingo39aeb522009-09-14 20:04:48 +02001128 (double)work_list->total_runtime / 1e6,
1129 work_list->nb_atoms, (double)avg / 1e6,
Frederic Weisbecker3786310a2009-12-09 21:40:08 +01001130 (double)work_list->max_lat / 1e6,
1131 (double)work_list->max_lat_at / 1e9);
Frederic Weisbeckercdce9d72009-09-12 08:06:14 +02001132}
1133
mingo39aeb522009-09-14 20:04:48 +02001134static int pid_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001135{
Adrian Hunter38051232013-07-04 16:20:31 +03001136 if (l->thread->tid < r->thread->tid)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001137 return -1;
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;
1140
1141 return 0;
1142}
1143
mingo39aeb522009-09-14 20:04:48 +02001144static int avg_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001145{
1146 u64 avgl, avgr;
1147
1148 if (!l->nb_atoms)
1149 return -1;
1150
1151 if (!r->nb_atoms)
1152 return 1;
1153
1154 avgl = l->total_lat / l->nb_atoms;
1155 avgr = r->total_lat / r->nb_atoms;
1156
1157 if (avgl < avgr)
1158 return -1;
1159 if (avgl > avgr)
1160 return 1;
1161
1162 return 0;
1163}
1164
mingo39aeb522009-09-14 20:04:48 +02001165static int max_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001166{
1167 if (l->max_lat < r->max_lat)
1168 return -1;
1169 if (l->max_lat > r->max_lat)
1170 return 1;
1171
1172 return 0;
1173}
1174
mingo39aeb522009-09-14 20:04:48 +02001175static int switch_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001176{
1177 if (l->nb_atoms < r->nb_atoms)
1178 return -1;
1179 if (l->nb_atoms > r->nb_atoms)
1180 return 1;
1181
1182 return 0;
1183}
1184
mingo39aeb522009-09-14 20:04:48 +02001185static int runtime_cmp(struct work_atoms *l, struct work_atoms *r)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001186{
1187 if (l->total_runtime < r->total_runtime)
1188 return -1;
1189 if (l->total_runtime > r->total_runtime)
1190 return 1;
1191
1192 return 0;
1193}
1194
Randy Dunlapcbef79a2009-10-05 13:17:29 -07001195static int sort_dimension__add(const char *tok, struct list_head *list)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001196{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001197 size_t i;
1198 static struct sort_dimension avg_sort_dimension = {
1199 .name = "avg",
1200 .cmp = avg_cmp,
1201 };
1202 static struct sort_dimension max_sort_dimension = {
1203 .name = "max",
1204 .cmp = max_cmp,
1205 };
1206 static struct sort_dimension pid_sort_dimension = {
1207 .name = "pid",
1208 .cmp = pid_cmp,
1209 };
1210 static struct sort_dimension runtime_sort_dimension = {
1211 .name = "runtime",
1212 .cmp = runtime_cmp,
1213 };
1214 static struct sort_dimension switch_sort_dimension = {
1215 .name = "switch",
1216 .cmp = switch_cmp,
1217 };
1218 struct sort_dimension *available_sorts[] = {
1219 &pid_sort_dimension,
1220 &avg_sort_dimension,
1221 &max_sort_dimension,
1222 &switch_sort_dimension,
1223 &runtime_sort_dimension,
1224 };
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001225
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001226 for (i = 0; i < ARRAY_SIZE(available_sorts); i++) {
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001227 if (!strcmp(available_sorts[i]->name, tok)) {
1228 list_add_tail(&available_sorts[i]->list, list);
1229
1230 return 0;
1231 }
1232 }
1233
1234 return -1;
1235}
1236
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001237static void perf_sched__sort_lat(struct perf_sched *sched)
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001238{
1239 struct rb_node *node;
1240
1241 for (;;) {
mingo39aeb522009-09-14 20:04:48 +02001242 struct work_atoms *data;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001243 node = rb_first(&sched->atom_root);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001244 if (!node)
1245 break;
1246
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001247 rb_erase(node, &sched->atom_root);
mingo39aeb522009-09-14 20:04:48 +02001248 data = rb_entry(node, struct work_atoms, node);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001249 __thread_latency_insert(&sched->sorted_atom_root, data, &sched->sort_list);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001250 }
1251}
1252
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001253static int process_sched_wakeup_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001254 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001255 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001256 struct machine *machine)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001257{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001258 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001259
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001260 if (sched->tp_handler->wakeup_event)
1261 return sched->tp_handler->wakeup_event(sched, evsel, sample, machine);
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001262
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001263 return 0;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001264}
1265
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001266static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
1267 struct perf_sample *sample, struct machine *machine)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001268{
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001269 const u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1270 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001271 struct thread *sched_out __maybe_unused, *sched_in;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001272 int new_shortname;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001273 u64 timestamp0, timestamp = sample->time;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001274 s64 delta;
Arnaldo Carvalho de Melo7f7f8d02012-08-07 11:33:42 -03001275 int cpu, this_cpu = sample->cpu;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001276
1277 BUG_ON(this_cpu >= MAX_CPUS || this_cpu < 0);
1278
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001279 if (this_cpu > sched->max_cpu)
1280 sched->max_cpu = this_cpu;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001281
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001282 timestamp0 = sched->cpu_last_switched[this_cpu];
1283 sched->cpu_last_switched[this_cpu] = timestamp;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001284 if (timestamp0)
1285 delta = timestamp - timestamp0;
1286 else
1287 delta = 0;
1288
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001289 if (delta < 0) {
Namhyung Kim60b7d142012-09-12 11:11:06 +09001290 pr_err("hm, delta: %" PRIu64 " < 0 ?\n", delta);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001291 return -1;
1292 }
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001293
Adrian Hunter314add62013-08-27 11:23:03 +03001294 sched_out = machine__findnew_thread(machine, 0, prev_pid);
1295 sched_in = machine__findnew_thread(machine, 0, 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]) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001303 sched_in->shortname[0] = sched->next_shortname1;
1304 sched_in->shortname[1] = sched->next_shortname2;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001305
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001306 if (sched->next_shortname1 < 'Z') {
1307 sched->next_shortname1++;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001308 } else {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001309 sched->next_shortname1='A';
1310 if (sched->next_shortname2 < '9') {
1311 sched->next_shortname2++;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001312 } else {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001313 sched->next_shortname2='0';
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001314 }
1315 }
1316 new_shortname = 1;
1317 }
1318
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001319 for (cpu = 0; cpu <= sched->max_cpu; cpu++) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001320 if (cpu != this_cpu)
1321 printf(" ");
1322 else
1323 printf("*");
1324
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001325 if (sched->curr_thread[cpu]) {
Adrian Hunter38051232013-07-04 16:20:31 +03001326 if (sched->curr_thread[cpu]->tid)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001327 printf("%2s ", sched->curr_thread[cpu]->shortname);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001328 else
1329 printf(". ");
1330 } else
1331 printf(" ");
1332 }
1333
1334 printf(" %12.6f secs ", (double)timestamp/1e9);
1335 if (new_shortname) {
1336 printf("%s => %s:%d\n",
Adrian Hunter38051232013-07-04 16:20:31 +03001337 sched_in->shortname, sched_in->comm, sched_in->tid);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001338 } else {
1339 printf("\n");
1340 }
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001341
1342 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001343}
1344
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001345static int process_sched_switch_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001346 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001347 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001348 struct machine *machine)
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001349{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001350 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001351 int this_cpu = sample->cpu, err = 0;
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001352 u32 prev_pid = perf_evsel__intval(evsel, sample, "prev_pid"),
1353 next_pid = perf_evsel__intval(evsel, sample, "next_pid");
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001354
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001355 if (sched->curr_pid[this_cpu] != (u32)-1) {
Ingo Molnarc8a37752009-09-16 14:07:00 +02001356 /*
1357 * Are we trying to switch away a PID that is
1358 * not current?
1359 */
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001360 if (sched->curr_pid[this_cpu] != prev_pid)
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001361 sched->nr_context_switch_bugs++;
Ingo Molnarc8a37752009-09-16 14:07:00 +02001362 }
Ingo Molnarc8a37752009-09-16 14:07:00 +02001363
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001364 if (sched->tp_handler->switch_event)
1365 err = sched->tp_handler->switch_event(sched, evsel, sample, machine);
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001366
1367 sched->curr_pid[this_cpu] = next_pid;
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001368 return err;
Frederic Weisbecker419ab0d2009-09-12 03:59:01 +02001369}
1370
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001371static int process_sched_runtime_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001372 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001373 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001374 struct machine *machine)
mingo39aeb522009-09-14 20:04:48 +02001375{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001376 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
mingo39aeb522009-09-14 20:04:48 +02001377
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001378 if (sched->tp_handler->runtime_event)
1379 return sched->tp_handler->runtime_event(sched, evsel, sample, machine);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001380
1381 return 0;
Ingo Molnarec156762009-09-11 12:12:54 +02001382}
1383
David Aherncb627502013-08-07 22:50:47 -04001384static int perf_sched__process_fork_event(struct perf_tool *tool,
1385 union perf_event *event,
1386 struct perf_sample *sample,
1387 struct machine *machine)
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001388{
1389 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
1390
David Aherncb627502013-08-07 22:50:47 -04001391 /* run the fork event through the perf machineruy */
1392 perf_event__process_fork(tool, event, sample, machine);
1393
1394 /* and then run additional processing needed for this command */
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001395 if (sched->tp_handler->fork_event)
David Aherncb627502013-08-07 22:50:47 -04001396 return sched->tp_handler->fork_event(sched, event, machine);
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001397
1398 return 0;
1399}
1400
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001401static int process_sched_migrate_task_event(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001402 struct perf_evsel *evsel,
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001403 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001404 struct machine *machine)
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001405{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001406 struct perf_sched *sched = container_of(tool, struct perf_sched, tool);
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001407
Arnaldo Carvalho de Melo9ec3f4e2012-09-11 19:29:17 -03001408 if (sched->tp_handler->migrate_task_event)
1409 return sched->tp_handler->migrate_task_event(sched, evsel, sample, machine);
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001410
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001411 return 0;
Mike Galbraith55ffb7a2009-10-10 14:46:04 +02001412}
1413
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001414typedef int (*tracepoint_handler)(struct perf_tool *tool,
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001415 struct perf_evsel *evsel,
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001416 struct perf_sample *sample,
Arnaldo Carvalho de Melo4218e672012-09-11 13:18:47 -03001417 struct machine *machine);
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001418
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001419static int perf_sched__process_tracepoint_sample(struct perf_tool *tool __maybe_unused,
1420 union perf_event *event __maybe_unused,
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001421 struct perf_sample *sample,
1422 struct perf_evsel *evsel,
1423 struct machine *machine)
Ingo Molnarec156762009-09-11 12:12:54 +02001424{
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001425 int err = 0;
Ingo Molnarec156762009-09-11 12:12:54 +02001426
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001427 evsel->hists.stats.total_period += sample->period;
1428 hists__inc_nr_events(&evsel->hists, PERF_RECORD_SAMPLE);
Julia Lawallf39cdf22009-10-17 08:43:17 +02001429
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001430 if (evsel->handler.func != NULL) {
1431 tracepoint_handler f = evsel->handler.func;
Arnaldo Carvalho de Melo2b7fcbc2012-09-11 19:29:17 -03001432 err = f(tool, evsel, sample, machine);
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001433 }
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001434
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001435 return err;
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001436}
1437
David Ahernad9def72013-08-07 22:50:44 -04001438static int perf_sched__read_events(struct perf_sched *sched,
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001439 struct perf_session **psession)
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001440{
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001441 const struct perf_evsel_str_handler handlers[] = {
1442 { "sched:sched_switch", process_sched_switch_event, },
1443 { "sched:sched_stat_runtime", process_sched_runtime_event, },
1444 { "sched:sched_wakeup", process_sched_wakeup_event, },
1445 { "sched:sched_wakeup_new", process_sched_wakeup_event, },
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001446 { "sched:sched_migrate_task", process_sched_migrate_task_event, },
1447 };
Arnaldo Carvalho de Meloda378962012-06-27 13:08:42 -03001448 struct perf_session *session;
1449
Feng Tang70cb4e92012-10-30 11:56:02 +08001450 session = perf_session__new(input_name, O_RDONLY, 0, false, &sched->tool);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001451 if (session == NULL) {
1452 pr_debug("No Memory for session\n");
1453 return -1;
1454 }
Arnaldo Carvalho de Melo94c744b2009-12-11 21:24:02 -02001455
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001456 if (perf_session__set_tracepoints_handlers(session, handlers))
1457 goto out_delete;
Arnaldo Carvalho de Meloee29be62011-11-28 17:57:40 -02001458
Arnaldo Carvalho de Melocee75ac2010-05-14 13:16:55 -03001459 if (perf_session__has_traces(session, "record -R")) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001460 int err = perf_session__process_events(session, &sched->tool);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001461 if (err) {
1462 pr_err("Failed to process events, error %d", err);
1463 goto out_delete;
1464 }
Jiri Olsa4c09baf2011-08-08 23:03:34 +02001465
Arnaldo Carvalho de Melo28a6b6a2012-12-18 16:24:46 -03001466 sched->nr_events = session->stats.nr_events[0];
1467 sched->nr_lost_events = session->stats.total_lost;
1468 sched->nr_lost_chunks = session->stats.nr_events[PERF_RECORD_LOST];
Arnaldo Carvalho de Melocee75ac2010-05-14 13:16:55 -03001469 }
Arnaldo Carvalho de Melod549c7692009-12-27 21:37:02 -02001470
Jiri Olsa4c09baf2011-08-08 23:03:34 +02001471 if (psession)
1472 *psession = session;
David Ahernad9def72013-08-07 22:50:44 -04001473 else
1474 perf_session__delete(session);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001475
1476 return 0;
1477
1478out_delete:
1479 perf_session__delete(session);
1480 return -1;
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001481}
1482
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001483static void print_bad_events(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001484{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001485 if (sched->nr_unordered_timestamps && sched->nr_timestamps) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001486 printf(" INFO: %.3f%% unordered timestamps (%ld out of %ld)\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001487 (double)sched->nr_unordered_timestamps/(double)sched->nr_timestamps*100.0,
1488 sched->nr_unordered_timestamps, sched->nr_timestamps);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001489 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001490 if (sched->nr_lost_events && sched->nr_events) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001491 printf(" INFO: %.3f%% lost events (%ld out of %ld, in %ld chunks)\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001492 (double)sched->nr_lost_events/(double)sched->nr_events * 100.0,
1493 sched->nr_lost_events, sched->nr_events, sched->nr_lost_chunks);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001494 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001495 if (sched->nr_state_machine_bugs && sched->nr_timestamps) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001496 printf(" INFO: %.3f%% state machine bugs (%ld out of %ld)",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001497 (double)sched->nr_state_machine_bugs/(double)sched->nr_timestamps*100.0,
1498 sched->nr_state_machine_bugs, sched->nr_timestamps);
1499 if (sched->nr_lost_events)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001500 printf(" (due to lost events?)");
1501 printf("\n");
1502 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001503 if (sched->nr_context_switch_bugs && sched->nr_timestamps) {
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001504 printf(" INFO: %.3f%% context switch bugs (%ld out of %ld)",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001505 (double)sched->nr_context_switch_bugs/(double)sched->nr_timestamps*100.0,
1506 sched->nr_context_switch_bugs, sched->nr_timestamps);
1507 if (sched->nr_lost_events)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001508 printf(" (due to lost events?)");
1509 printf("\n");
1510 }
1511}
1512
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001513static int perf_sched__lat(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001514{
1515 struct rb_node *next;
Jiri Olsa4c09baf2011-08-08 23:03:34 +02001516 struct perf_session *session;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001517
1518 setup_pager();
David Ahernad9def72013-08-07 22:50:44 -04001519
1520 /* save session -- references to threads are held in work_list */
1521 if (perf_sched__read_events(sched, &session))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001522 return -1;
David Ahernad9def72013-08-07 22:50:44 -04001523
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001524 perf_sched__sort_lat(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001525
Frederic Weisbecker3786310a2009-12-09 21:40:08 +01001526 printf("\n ---------------------------------------------------------------------------------------------------------------\n");
1527 printf(" Task | Runtime ms | Switches | Average delay ms | Maximum delay ms | Maximum delay at |\n");
1528 printf(" ---------------------------------------------------------------------------------------------------------------\n");
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001529
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001530 next = rb_first(&sched->sorted_atom_root);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001531
1532 while (next) {
1533 struct work_atoms *work_list;
1534
1535 work_list = rb_entry(next, struct work_atoms, node);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001536 output_lat_thread(sched, work_list);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001537 next = rb_next(next);
1538 }
1539
1540 printf(" -----------------------------------------------------------------------------------------\n");
Arnaldo Carvalho de Melo9486aa32011-01-22 20:37:02 -02001541 printf(" TOTAL: |%11.3f ms |%9" PRIu64 " |\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001542 (double)sched->all_runtime / 1e6, sched->all_count);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001543
1544 printf(" ---------------------------------------------------\n");
1545
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001546 print_bad_events(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001547 printf("\n");
1548
Jiri Olsa4c09baf2011-08-08 23:03:34 +02001549 perf_session__delete(session);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001550 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001551}
1552
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001553static int perf_sched__map(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001554{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001555 sched->max_cpu = sysconf(_SC_NPROCESSORS_CONF);
Ingo Molnar40749d02009-09-17 18:24:55 +02001556
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001557 setup_pager();
David Ahernad9def72013-08-07 22:50:44 -04001558 if (perf_sched__read_events(sched, NULL))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001559 return -1;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001560 print_bad_events(sched);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001561 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001562}
1563
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001564static int perf_sched__replay(struct perf_sched *sched)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001565{
1566 unsigned long i;
1567
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001568 calibrate_run_measurement_overhead(sched);
1569 calibrate_sleep_measurement_overhead(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001570
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001571 test_calibrations(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001572
David Ahernad9def72013-08-07 22:50:44 -04001573 if (perf_sched__read_events(sched, NULL))
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001574 return -1;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001575
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001576 printf("nr_run_events: %ld\n", sched->nr_run_events);
1577 printf("nr_sleep_events: %ld\n", sched->nr_sleep_events);
1578 printf("nr_wakeup_events: %ld\n", sched->nr_wakeup_events);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001579
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001580 if (sched->targetless_wakeups)
1581 printf("target-less wakeups: %ld\n", sched->targetless_wakeups);
1582 if (sched->multitarget_wakeups)
1583 printf("multi-target wakeups: %ld\n", sched->multitarget_wakeups);
1584 if (sched->nr_run_events_optimized)
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001585 printf("run atoms optimized: %ld\n",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001586 sched->nr_run_events_optimized);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001587
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001588 print_task_traces(sched);
1589 add_cross_task_wakeups(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001590
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001591 create_tasks(sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001592 printf("------------------------------------------------------------\n");
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001593 for (i = 0; i < sched->replay_repeat; i++)
1594 run_one_test(sched);
Arnaldo Carvalho de Meloa116e052012-09-08 22:53:06 -03001595
1596 return 0;
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001597}
1598
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001599static void setup_sorting(struct perf_sched *sched, const struct option *options,
1600 const char * const usage_msg[])
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001601{
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001602 char *tmp, *tok, *str = strdup(sched->sort_order);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001603
1604 for (tok = strtok_r(str, ", ", &tmp);
1605 tok; tok = strtok_r(NULL, ", ", &tmp)) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001606 if (sort_dimension__add(tok, &sched->sort_list) < 0) {
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001607 error("Unknown --sort key: `%s'", tok);
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001608 usage_with_options(usage_msg, options);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001609 }
1610 }
1611
1612 free(str);
1613
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001614 sort_dimension__add("pid", &sched->cmp_pid);
Frederic Weisbeckerdaa1d7a2009-09-13 03:36:29 +02001615}
1616
Ingo Molnar1fc35b22009-09-13 09:44:29 +02001617static int __cmd_record(int argc, const char **argv)
1618{
1619 unsigned int rec_argc, i, j;
1620 const char **rec_argv;
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001621 const char * const record_args[] = {
1622 "record",
1623 "-a",
1624 "-R",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001625 "-m", "1024",
1626 "-c", "1",
1627 "-e", "sched:sched_switch",
1628 "-e", "sched:sched_stat_wait",
1629 "-e", "sched:sched_stat_sleep",
1630 "-e", "sched:sched_stat_iowait",
1631 "-e", "sched:sched_stat_runtime",
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001632 "-e", "sched:sched_process_fork",
1633 "-e", "sched:sched_wakeup",
1634 "-e", "sched:sched_migrate_task",
1635 };
Ingo Molnar1fc35b22009-09-13 09:44:29 +02001636
1637 rec_argc = ARRAY_SIZE(record_args) + argc - 1;
1638 rec_argv = calloc(rec_argc + 1, sizeof(char *));
1639
Arnaldo Carvalho de Meloe462dc52011-01-10 10:48:47 -02001640 if (rec_argv == NULL)
Chris Samuelce47dc52010-11-13 13:35:06 +11001641 return -ENOMEM;
1642
Ingo Molnar1fc35b22009-09-13 09:44:29 +02001643 for (i = 0; i < ARRAY_SIZE(record_args); i++)
1644 rec_argv[i] = strdup(record_args[i]);
1645
1646 for (j = 1; j < (unsigned int)argc; j++, i++)
1647 rec_argv[i] = argv[j];
1648
1649 BUG_ON(i != rec_argc);
1650
1651 return cmd_record(i, rec_argv, NULL);
1652}
1653
Namhyung Kimf36f83f2013-06-04 14:46:19 +09001654static const char default_sort_order[] = "avg, max, switch, runtime";
1655static struct perf_sched sched = {
1656 .tool = {
1657 .sample = perf_sched__process_tracepoint_sample,
1658 .comm = perf_event__process_comm,
1659 .lost = perf_event__process_lost,
David Aherncb627502013-08-07 22:50:47 -04001660 .fork = perf_sched__process_fork_event,
Namhyung Kimf36f83f2013-06-04 14:46:19 +09001661 .ordered_samples = true,
1662 },
1663 .cmp_pid = LIST_HEAD_INIT(sched.cmp_pid),
1664 .sort_list = LIST_HEAD_INIT(sched.sort_list),
1665 .start_work_mutex = PTHREAD_MUTEX_INITIALIZER,
1666 .work_done_wait_mutex = PTHREAD_MUTEX_INITIALIZER,
1667 .curr_pid = { [0 ... MAX_CPUS - 1] = -1 },
1668 .sort_order = default_sort_order,
1669 .replay_repeat = 10,
1670 .profile_cpu = -1,
1671 .next_shortname1 = 'A',
1672 .next_shortname2 = '0',
1673};
1674
Irina Tirdea1d037ca2012-09-11 01:15:03 +03001675int cmd_sched(int argc, const char **argv, const char *prefix __maybe_unused)
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001676{
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 };
1714 const char * const sched_usage[] = {
1715 "perf sched [<options>] {record|latency|map|replay|script}",
1716 NULL
1717 };
1718 struct trace_sched_handler lat_ops = {
1719 .wakeup_event = latency_wakeup_event,
1720 .switch_event = latency_switch_event,
1721 .runtime_event = latency_runtime_event,
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001722 .migrate_task_event = latency_migrate_task_event,
1723 };
1724 struct trace_sched_handler map_ops = {
1725 .switch_event = map_switch_event,
1726 };
1727 struct trace_sched_handler replay_ops = {
1728 .wakeup_event = replay_wakeup_event,
1729 .switch_event = replay_switch_event,
1730 .fork_event = replay_fork_event,
1731 };
1732
Ingo Molnarf2858d82009-09-11 12:12:54 +02001733 argc = parse_options(argc, argv, sched_options, sched_usage,
1734 PARSE_OPT_STOP_AT_NON_OPTION);
1735 if (!argc)
1736 usage_with_options(sched_usage, sched_options);
1737
Xiao Guangrongc0777c52009-12-07 12:04:49 +08001738 /*
Ingo Molnar133dc4c2010-11-16 18:45:39 +01001739 * Aliased to 'perf script' for now:
Xiao Guangrongc0777c52009-12-07 12:04:49 +08001740 */
Ingo Molnar133dc4c2010-11-16 18:45:39 +01001741 if (!strcmp(argv[0], "script"))
1742 return cmd_script(argc, argv, prefix);
Xiao Guangrongc0777c52009-12-07 12:04:49 +08001743
Arnaldo Carvalho de Melo75be6cf2009-12-15 20:04:39 -02001744 symbol__init();
Ingo Molnar1fc35b22009-09-13 09:44:29 +02001745 if (!strncmp(argv[0], "rec", 3)) {
1746 return __cmd_record(argc, argv);
1747 } else if (!strncmp(argv[0], "lat", 3)) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001748 sched.tp_handler = &lat_ops;
Ingo Molnarf2858d82009-09-11 12:12:54 +02001749 if (argc > 1) {
1750 argc = parse_options(argc, argv, latency_options, latency_usage, 0);
1751 if (argc)
1752 usage_with_options(latency_usage, latency_options);
Ingo Molnarf2858d82009-09-11 12:12:54 +02001753 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001754 setup_sorting(&sched, latency_options, latency_usage);
1755 return perf_sched__lat(&sched);
Ingo Molnar0ec04e12009-09-16 17:40:48 +02001756 } else if (!strcmp(argv[0], "map")) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001757 sched.tp_handler = &map_ops;
1758 setup_sorting(&sched, latency_options, latency_usage);
1759 return perf_sched__map(&sched);
Ingo Molnarf2858d82009-09-11 12:12:54 +02001760 } else if (!strncmp(argv[0], "rep", 3)) {
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001761 sched.tp_handler = &replay_ops;
Ingo Molnarf2858d82009-09-11 12:12:54 +02001762 if (argc) {
1763 argc = parse_options(argc, argv, replay_options, replay_usage, 0);
1764 if (argc)
1765 usage_with_options(replay_usage, replay_options);
1766 }
Arnaldo Carvalho de Melo0e9b07e2012-09-11 17:29:27 -03001767 return perf_sched__replay(&sched);
Ingo Molnarf2858d82009-09-11 12:12:54 +02001768 } else {
1769 usage_with_options(sched_usage, sched_options);
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001770 }
1771
Ingo Molnarec156762009-09-11 12:12:54 +02001772 return 0;
Ingo Molnar0a02ad92009-09-11 12:12:54 +02001773}