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Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -02001/*
2 * builtin-diff.c
3 *
4 * Builtin diff command: Analyze two perf.data input files, look up and read
5 * DSOs and symbol information, sort them and produce a diff.
6 */
7#include "builtin.h"
8
9#include "util/debug.h"
10#include "util/event.h"
11#include "util/hist.h"
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -020012#include "util/evsel.h"
Jiri Olsa863e4512012-09-06 17:46:55 +020013#include "util/evlist.h"
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -020014#include "util/session.h"
Arnaldo Carvalho de Melo45694aa2011-11-28 08:30:20 -020015#include "util/tool.h"
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -020016#include "util/sort.h"
17#include "util/symbol.h"
18#include "util/util.h"
Jiri Olsaf5fc1412013-10-15 16:27:32 +020019#include "util/data.h"
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -020020
21#include <stdlib.h>
Jiri Olsa345dc0b2013-02-03 20:08:34 +010022#include <math.h>
23
24/* Diff command specific HPP columns. */
25enum {
26 PERF_HPP_DIFF__BASELINE,
27 PERF_HPP_DIFF__PERIOD,
28 PERF_HPP_DIFF__PERIOD_BASELINE,
29 PERF_HPP_DIFF__DELTA,
30 PERF_HPP_DIFF__RATIO,
31 PERF_HPP_DIFF__WEIGHTED_DIFF,
32 PERF_HPP_DIFF__FORMULA,
33
34 PERF_HPP_DIFF__MAX_INDEX
35};
36
37struct diff_hpp_fmt {
38 struct perf_hpp_fmt fmt;
39 int idx;
40 char *header;
41 int header_width;
42};
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -020043
Jiri Olsaec308422013-03-25 00:02:01 +010044struct data__file {
45 struct perf_session *session;
Jiri Olsaf5fc1412013-10-15 16:27:32 +020046 struct perf_data_file file;
Jiri Olsaec308422013-03-25 00:02:01 +010047 int idx;
Jiri Olsa22aeb7f2012-12-01 22:00:00 +010048 struct hists *hists;
Jiri Olsac818b492012-12-01 21:57:04 +010049 struct diff_hpp_fmt fmt[PERF_HPP_DIFF__MAX_INDEX];
Jiri Olsaec308422013-03-25 00:02:01 +010050};
51
52static struct data__file *data__files;
53static int data__files_cnt;
54
55#define data__for_each_file_start(i, d, s) \
56 for (i = s, d = &data__files[s]; \
57 i < data__files_cnt; \
58 i++, d = &data__files[i])
59
60#define data__for_each_file(i, d) data__for_each_file_start(i, d, 0)
Jiri Olsa22aeb7f2012-12-01 22:00:00 +010061#define data__for_each_file_new(i, d) data__for_each_file_start(i, d, 1)
Jiri Olsaec308422013-03-25 00:02:01 +010062
63static char diff__default_sort_order[] = "dso,symbol";
64static bool force;
Jiri Olsa61949b22012-10-05 16:44:44 +020065static bool show_period;
Jiri Olsaed279da2012-10-05 16:44:45 +020066static bool show_formula;
Jiri Olsaa06d1432012-10-05 16:44:40 +020067static bool show_baseline_only;
Jiri Olsa5f3f8d32012-11-25 23:10:20 +010068static unsigned int sort_compute;
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -020069
Jiri Olsa81d5f952012-10-05 16:44:43 +020070static s64 compute_wdiff_w1;
71static s64 compute_wdiff_w2;
72
Jiri Olsa7aaf6b32012-10-05 16:44:41 +020073enum {
74 COMPUTE_DELTA,
75 COMPUTE_RATIO,
Jiri Olsa81d5f952012-10-05 16:44:43 +020076 COMPUTE_WEIGHTED_DIFF,
Jiri Olsa7aaf6b32012-10-05 16:44:41 +020077 COMPUTE_MAX,
78};
79
80const char *compute_names[COMPUTE_MAX] = {
81 [COMPUTE_DELTA] = "delta",
82 [COMPUTE_RATIO] = "ratio",
Jiri Olsa81d5f952012-10-05 16:44:43 +020083 [COMPUTE_WEIGHTED_DIFF] = "wdiff",
Jiri Olsa7aaf6b32012-10-05 16:44:41 +020084};
85
86static int compute;
87
Jiri Olsa345dc0b2013-02-03 20:08:34 +010088static int compute_2_hpp[COMPUTE_MAX] = {
89 [COMPUTE_DELTA] = PERF_HPP_DIFF__DELTA,
90 [COMPUTE_RATIO] = PERF_HPP_DIFF__RATIO,
91 [COMPUTE_WEIGHTED_DIFF] = PERF_HPP_DIFF__WEIGHTED_DIFF,
92};
93
94#define MAX_COL_WIDTH 70
95
96static struct header_column {
97 const char *name;
98 int width;
99} columns[PERF_HPP_DIFF__MAX_INDEX] = {
100 [PERF_HPP_DIFF__BASELINE] = {
101 .name = "Baseline",
102 },
103 [PERF_HPP_DIFF__PERIOD] = {
104 .name = "Period",
105 .width = 14,
106 },
107 [PERF_HPP_DIFF__PERIOD_BASELINE] = {
108 .name = "Base period",
109 .width = 14,
110 },
111 [PERF_HPP_DIFF__DELTA] = {
112 .name = "Delta",
113 .width = 7,
114 },
115 [PERF_HPP_DIFF__RATIO] = {
116 .name = "Ratio",
117 .width = 14,
118 },
119 [PERF_HPP_DIFF__WEIGHTED_DIFF] = {
120 .name = "Weighted diff",
121 .width = 14,
122 },
123 [PERF_HPP_DIFF__FORMULA] = {
124 .name = "Formula",
125 .width = MAX_COL_WIDTH,
126 }
127};
128
Jiri Olsa81d5f952012-10-05 16:44:43 +0200129static int setup_compute_opt_wdiff(char *opt)
130{
131 char *w1_str = opt;
132 char *w2_str;
133
134 int ret = -EINVAL;
135
136 if (!opt)
137 goto out;
138
139 w2_str = strchr(opt, ',');
140 if (!w2_str)
141 goto out;
142
143 *w2_str++ = 0x0;
144 if (!*w2_str)
145 goto out;
146
147 compute_wdiff_w1 = strtol(w1_str, NULL, 10);
148 compute_wdiff_w2 = strtol(w2_str, NULL, 10);
149
150 if (!compute_wdiff_w1 || !compute_wdiff_w2)
151 goto out;
152
153 pr_debug("compute wdiff w1(%" PRId64 ") w2(%" PRId64 ")\n",
154 compute_wdiff_w1, compute_wdiff_w2);
155
156 ret = 0;
157
158 out:
159 if (ret)
160 pr_err("Failed: wrong weight data, use 'wdiff:w1,w2'\n");
161
162 return ret;
163}
164
165static int setup_compute_opt(char *opt)
166{
167 if (compute == COMPUTE_WEIGHTED_DIFF)
168 return setup_compute_opt_wdiff(opt);
169
170 if (opt) {
171 pr_err("Failed: extra option specified '%s'", opt);
172 return -EINVAL;
173 }
174
175 return 0;
176}
177
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200178static int setup_compute(const struct option *opt, const char *str,
179 int unset __maybe_unused)
180{
181 int *cp = (int *) opt->value;
Jiri Olsa81d5f952012-10-05 16:44:43 +0200182 char *cstr = (char *) str;
183 char buf[50];
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200184 unsigned i;
Jiri Olsa81d5f952012-10-05 16:44:43 +0200185 char *option;
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200186
187 if (!str) {
188 *cp = COMPUTE_DELTA;
189 return 0;
190 }
191
Jiri Olsa81d5f952012-10-05 16:44:43 +0200192 option = strchr(str, ':');
193 if (option) {
194 unsigned len = option++ - str;
195
196 /*
197 * The str data are not writeable, so we need
198 * to use another buffer.
199 */
200
201 /* No option value is longer. */
202 if (len >= sizeof(buf))
203 return -EINVAL;
204
205 strncpy(buf, str, len);
206 buf[len] = 0x0;
207 cstr = buf;
208 }
209
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200210 for (i = 0; i < COMPUTE_MAX; i++)
Jiri Olsa81d5f952012-10-05 16:44:43 +0200211 if (!strcmp(cstr, compute_names[i])) {
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200212 *cp = i;
Jiri Olsa81d5f952012-10-05 16:44:43 +0200213 return setup_compute_opt(option);
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200214 }
215
216 pr_err("Failed: '%s' is not computation method "
Jiri Olsa81d5f952012-10-05 16:44:43 +0200217 "(use 'delta','ratio' or 'wdiff')\n", str);
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200218 return -EINVAL;
219}
220
Jiri Olsaef358e62012-10-21 23:31:51 +0200221static double period_percent(struct hist_entry *he, u64 period)
Jiri Olsa96c47f12012-10-05 16:44:42 +0200222{
223 u64 total = he->hists->stats.total_period;
224 return (period * 100.0) / total;
225}
226
Jiri Olsaef358e62012-10-21 23:31:51 +0200227static double compute_delta(struct hist_entry *he, struct hist_entry *pair)
Jiri Olsa96c47f12012-10-05 16:44:42 +0200228{
Jiri Olsaef358e62012-10-21 23:31:51 +0200229 double old_percent = period_percent(he, he->stat.period);
230 double new_percent = period_percent(pair, pair->stat.period);
Jiri Olsa96c47f12012-10-05 16:44:42 +0200231
Jiri Olsa9af303e2012-12-01 21:15:40 +0100232 pair->diff.period_ratio_delta = new_percent - old_percent;
233 pair->diff.computed = true;
234 return pair->diff.period_ratio_delta;
Jiri Olsa96c47f12012-10-05 16:44:42 +0200235}
236
Jiri Olsaef358e62012-10-21 23:31:51 +0200237static double compute_ratio(struct hist_entry *he, struct hist_entry *pair)
Jiri Olsa96c47f12012-10-05 16:44:42 +0200238{
Jiri Olsa9af303e2012-12-01 21:15:40 +0100239 double old_period = he->stat.period ?: 1;
240 double new_period = pair->stat.period;
Jiri Olsa96c47f12012-10-05 16:44:42 +0200241
Jiri Olsa9af303e2012-12-01 21:15:40 +0100242 pair->diff.computed = true;
243 pair->diff.period_ratio = new_period / old_period;
244 return pair->diff.period_ratio;
Jiri Olsa96c47f12012-10-05 16:44:42 +0200245}
246
Jiri Olsaef358e62012-10-21 23:31:51 +0200247static s64 compute_wdiff(struct hist_entry *he, struct hist_entry *pair)
Jiri Olsa81d5f952012-10-05 16:44:43 +0200248{
Jiri Olsa9af303e2012-12-01 21:15:40 +0100249 u64 old_period = he->stat.period;
250 u64 new_period = pair->stat.period;
Jiri Olsa81d5f952012-10-05 16:44:43 +0200251
Jiri Olsa9af303e2012-12-01 21:15:40 +0100252 pair->diff.computed = true;
253 pair->diff.wdiff = new_period * compute_wdiff_w2 -
254 old_period * compute_wdiff_w1;
Jiri Olsa81d5f952012-10-05 16:44:43 +0200255
Jiri Olsa9af303e2012-12-01 21:15:40 +0100256 return pair->diff.wdiff;
Jiri Olsa81d5f952012-10-05 16:44:43 +0200257}
258
Jiri Olsaf4c8bae2012-11-28 14:52:41 +0100259static int formula_delta(struct hist_entry *he, struct hist_entry *pair,
260 char *buf, size_t size)
Jiri Olsaed279da2012-10-05 16:44:45 +0200261{
Jiri Olsaed279da2012-10-05 16:44:45 +0200262 return scnprintf(buf, size,
263 "(%" PRIu64 " * 100 / %" PRIu64 ") - "
264 "(%" PRIu64 " * 100 / %" PRIu64 ")",
Jiri Olsa9af303e2012-12-01 21:15:40 +0100265 pair->stat.period, pair->hists->stats.total_period,
266 he->stat.period, he->hists->stats.total_period);
Jiri Olsaed279da2012-10-05 16:44:45 +0200267}
268
Jiri Olsaf4c8bae2012-11-28 14:52:41 +0100269static int formula_ratio(struct hist_entry *he, struct hist_entry *pair,
270 char *buf, size_t size)
Jiri Olsaed279da2012-10-05 16:44:45 +0200271{
Jiri Olsa9af303e2012-12-01 21:15:40 +0100272 double old_period = he->stat.period;
273 double new_period = pair->stat.period;
Jiri Olsaed279da2012-10-05 16:44:45 +0200274
275 return scnprintf(buf, size, "%.0F / %.0F", new_period, old_period);
276}
277
Jiri Olsaf4c8bae2012-11-28 14:52:41 +0100278static int formula_wdiff(struct hist_entry *he, struct hist_entry *pair,
279 char *buf, size_t size)
Jiri Olsaed279da2012-10-05 16:44:45 +0200280{
Jiri Olsa9af303e2012-12-01 21:15:40 +0100281 u64 old_period = he->stat.period;
282 u64 new_period = pair->stat.period;
Jiri Olsaed279da2012-10-05 16:44:45 +0200283
284 return scnprintf(buf, size,
285 "(%" PRIu64 " * " "%" PRId64 ") - (%" PRIu64 " * " "%" PRId64 ")",
286 new_period, compute_wdiff_w2, old_period, compute_wdiff_w1);
287}
288
Jiri Olsaef358e62012-10-21 23:31:51 +0200289static int formula_fprintf(struct hist_entry *he, struct hist_entry *pair,
290 char *buf, size_t size)
Jiri Olsaed279da2012-10-05 16:44:45 +0200291{
292 switch (compute) {
293 case COMPUTE_DELTA:
Jiri Olsaf4c8bae2012-11-28 14:52:41 +0100294 return formula_delta(he, pair, buf, size);
Jiri Olsaed279da2012-10-05 16:44:45 +0200295 case COMPUTE_RATIO:
Jiri Olsaf4c8bae2012-11-28 14:52:41 +0100296 return formula_ratio(he, pair, buf, size);
Jiri Olsaed279da2012-10-05 16:44:45 +0200297 case COMPUTE_WEIGHTED_DIFF:
Jiri Olsaf4c8bae2012-11-28 14:52:41 +0100298 return formula_wdiff(he, pair, buf, size);
Jiri Olsaed279da2012-10-05 16:44:45 +0200299 default:
300 BUG_ON(1);
301 }
302
303 return -1;
304}
305
Arnaldo Carvalho de Meloc824c432013-10-22 19:01:31 -0300306static int hists__add_entry(struct hists *hists,
Andi Kleen05484292013-01-24 16:10:29 +0100307 struct addr_location *al, u64 period,
Andi Kleen475eeab2013-09-20 07:40:43 -0700308 u64 weight, u64 transaction)
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200309{
Namhyung Kim41a4e6e2013-10-31 15:56:03 +0900310 if (__hists__add_entry(hists, al, NULL, NULL, NULL, period, weight,
311 transaction) != NULL)
Arnaldo Carvalho de Melo28e2a102010-05-09 13:02:23 -0300312 return 0;
313 return -ENOMEM;
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200314}
315
Irina Tirdea1d037ca2012-09-11 01:15:03 +0300316static int diff__process_sample_event(struct perf_tool *tool __maybe_unused,
Arnaldo Carvalho de Melod20deb62011-11-25 08:19:45 -0200317 union perf_event *event,
Arnaldo Carvalho de Melo8d50e5b2011-01-29 13:02:00 -0200318 struct perf_sample *sample,
Jiri Olsa863e4512012-09-06 17:46:55 +0200319 struct perf_evsel *evsel,
Arnaldo Carvalho de Melo743eb862011-11-28 07:56:39 -0200320 struct machine *machine)
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200321{
322 struct addr_location al;
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200323
Adrian Huntere44baa32013-08-08 14:32:25 +0300324 if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200325 pr_warning("problem processing %d event, skipping it.\n",
326 event->header.type);
327 return -1;
328 }
329
Jiri Olsad88c48f2012-10-05 16:44:46 +0200330 if (al.filtered)
Arnaldo Carvalho de Meloc410a332009-12-15 20:04:41 -0200331 return 0;
332
Andi Kleen475eeab2013-09-20 07:40:43 -0700333 if (hists__add_entry(&evsel->hists, &al, sample->period,
334 sample->weight, sample->transaction)) {
Arnaldo Carvalho de Meloc82ee822010-05-14 14:19:35 -0300335 pr_warning("problem incrementing symbol period, skipping event\n");
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200336 return -1;
337 }
338
Jiri Olsa863e4512012-09-06 17:46:55 +0200339 evsel->hists.stats.total_period += sample->period;
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200340 return 0;
341}
342
Jiri Olsa863e4512012-09-06 17:46:55 +0200343static struct perf_tool tool = {
344 .sample = diff__process_sample_event,
345 .mmap = perf_event__process_mmap,
346 .comm = perf_event__process_comm,
Arnaldo Carvalho de Melof62d3f02012-10-06 15:44:59 -0300347 .exit = perf_event__process_exit,
348 .fork = perf_event__process_fork,
Jiri Olsa863e4512012-09-06 17:46:55 +0200349 .lost = perf_event__process_lost,
350 .ordered_samples = true,
351 .ordering_requires_timestamps = true,
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200352};
353
Jiri Olsa863e4512012-09-06 17:46:55 +0200354static struct perf_evsel *evsel_match(struct perf_evsel *evsel,
355 struct perf_evlist *evlist)
356{
357 struct perf_evsel *e;
358
359 list_for_each_entry(e, &evlist->entries, node)
360 if (perf_evsel__match2(evsel, e))
361 return e;
362
363 return NULL;
364}
365
Namhyung Kimce74f602012-12-10 17:29:55 +0900366static void perf_evlist__collapse_resort(struct perf_evlist *evlist)
Jiri Olsadd464342012-10-04 21:49:36 +0900367{
368 struct perf_evsel *evsel;
369
370 list_for_each_entry(evsel, &evlist->entries, node) {
371 struct hists *hists = &evsel->hists;
372
Namhyung Kimc1fb5652013-10-11 14:15:38 +0900373 hists__collapse_resort(hists, NULL);
Jiri Olsadd464342012-10-04 21:49:36 +0900374 }
375}
376
Jiri Olsa5f3f8d32012-11-25 23:10:20 +0100377static struct hist_entry*
378get_pair_data(struct hist_entry *he, struct data__file *d)
379{
380 if (hist_entry__has_pairs(he)) {
381 struct hist_entry *pair;
382
383 list_for_each_entry(pair, &he->pairs.head, pairs.node)
384 if (pair->hists == d->hists)
385 return pair;
386 }
387
388 return NULL;
389}
390
391static struct hist_entry*
392get_pair_fmt(struct hist_entry *he, struct diff_hpp_fmt *dfmt)
393{
394 void *ptr = dfmt - dfmt->idx;
395 struct data__file *d = container_of(ptr, struct data__file, fmt);
396
397 return get_pair_data(he, d);
398}
399
Jiri Olsaa06d1432012-10-05 16:44:40 +0200400static void hists__baseline_only(struct hists *hists)
401{
Namhyung Kimce74f602012-12-10 17:29:55 +0900402 struct rb_root *root;
403 struct rb_node *next;
Jiri Olsaa06d1432012-10-05 16:44:40 +0200404
Namhyung Kimce74f602012-12-10 17:29:55 +0900405 if (sort__need_collapse)
406 root = &hists->entries_collapsed;
407 else
408 root = hists->entries_in;
409
410 next = rb_first(root);
Jiri Olsaa06d1432012-10-05 16:44:40 +0200411 while (next != NULL) {
Namhyung Kimce74f602012-12-10 17:29:55 +0900412 struct hist_entry *he = rb_entry(next, struct hist_entry, rb_node_in);
Jiri Olsaa06d1432012-10-05 16:44:40 +0200413
Namhyung Kimce74f602012-12-10 17:29:55 +0900414 next = rb_next(&he->rb_node_in);
Arnaldo Carvalho de Melob821c732012-10-25 14:42:45 -0200415 if (!hist_entry__next_pair(he)) {
Namhyung Kimce74f602012-12-10 17:29:55 +0900416 rb_erase(&he->rb_node_in, root);
Jiri Olsaa06d1432012-10-05 16:44:40 +0200417 hist_entry__free(he);
418 }
419 }
420}
421
Jiri Olsa96c47f12012-10-05 16:44:42 +0200422static void hists__precompute(struct hists *hists)
423{
Jiri Olsa367c53c2012-12-13 14:08:59 +0100424 struct rb_root *root;
425 struct rb_node *next;
Jiri Olsa96c47f12012-10-05 16:44:42 +0200426
Jiri Olsa367c53c2012-12-13 14:08:59 +0100427 if (sort__need_collapse)
428 root = &hists->entries_collapsed;
429 else
430 root = hists->entries_in;
431
432 next = rb_first(root);
Jiri Olsa96c47f12012-10-05 16:44:42 +0200433 while (next != NULL) {
Jiri Olsa5f3f8d32012-11-25 23:10:20 +0100434 struct hist_entry *he, *pair;
Jiri Olsa96c47f12012-10-05 16:44:42 +0200435
Jiri Olsa5f3f8d32012-11-25 23:10:20 +0100436 he = rb_entry(next, struct hist_entry, rb_node_in);
Jiri Olsa367c53c2012-12-13 14:08:59 +0100437 next = rb_next(&he->rb_node_in);
Jiri Olsa5f3f8d32012-11-25 23:10:20 +0100438
439 pair = get_pair_data(he, &data__files[sort_compute]);
Jiri Olsa05472da2012-11-28 14:52:40 +0100440 if (!pair)
441 continue;
Jiri Olsa96c47f12012-10-05 16:44:42 +0200442
443 switch (compute) {
444 case COMPUTE_DELTA:
Jiri Olsaef358e62012-10-21 23:31:51 +0200445 compute_delta(he, pair);
Jiri Olsa96c47f12012-10-05 16:44:42 +0200446 break;
447 case COMPUTE_RATIO:
Jiri Olsaef358e62012-10-21 23:31:51 +0200448 compute_ratio(he, pair);
Jiri Olsa96c47f12012-10-05 16:44:42 +0200449 break;
Jiri Olsa81d5f952012-10-05 16:44:43 +0200450 case COMPUTE_WEIGHTED_DIFF:
Jiri Olsaef358e62012-10-21 23:31:51 +0200451 compute_wdiff(he, pair);
Jiri Olsa81d5f952012-10-05 16:44:43 +0200452 break;
Jiri Olsa96c47f12012-10-05 16:44:42 +0200453 default:
454 BUG_ON(1);
455 }
456 }
457}
458
459static int64_t cmp_doubles(double l, double r)
460{
461 if (l > r)
462 return -1;
463 else if (l < r)
464 return 1;
465 else
466 return 0;
467}
468
469static int64_t
Jiri Olsa5f3f8d32012-11-25 23:10:20 +0100470__hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
Jiri Olsa96c47f12012-10-05 16:44:42 +0200471 int c)
472{
473 switch (c) {
474 case COMPUTE_DELTA:
475 {
476 double l = left->diff.period_ratio_delta;
477 double r = right->diff.period_ratio_delta;
478
479 return cmp_doubles(l, r);
480 }
481 case COMPUTE_RATIO:
482 {
483 double l = left->diff.period_ratio;
484 double r = right->diff.period_ratio;
485
486 return cmp_doubles(l, r);
487 }
Jiri Olsa81d5f952012-10-05 16:44:43 +0200488 case COMPUTE_WEIGHTED_DIFF:
489 {
490 s64 l = left->diff.wdiff;
491 s64 r = right->diff.wdiff;
492
493 return r - l;
494 }
Jiri Olsa96c47f12012-10-05 16:44:42 +0200495 default:
496 BUG_ON(1);
497 }
498
499 return 0;
500}
501
Jiri Olsa5f3f8d32012-11-25 23:10:20 +0100502static int64_t
503hist_entry__cmp_compute(struct hist_entry *left, struct hist_entry *right,
504 int c)
505{
506 bool pairs_left = hist_entry__has_pairs(left);
507 bool pairs_right = hist_entry__has_pairs(right);
508 struct hist_entry *p_right, *p_left;
509
510 if (!pairs_left && !pairs_right)
511 return 0;
512
513 if (!pairs_left || !pairs_right)
514 return pairs_left ? -1 : 1;
515
516 p_left = get_pair_data(left, &data__files[sort_compute]);
517 p_right = get_pair_data(right, &data__files[sort_compute]);
518
519 if (!p_left && !p_right)
520 return 0;
521
522 if (!p_left || !p_right)
523 return p_left ? -1 : 1;
524
525 /*
526 * We have 2 entries of same kind, let's
527 * make the data comparison.
528 */
529 return __hist_entry__cmp_compute(p_left, p_right, c);
530}
531
Jiri Olsa96c47f12012-10-05 16:44:42 +0200532static void insert_hist_entry_by_compute(struct rb_root *root,
533 struct hist_entry *he,
534 int c)
535{
536 struct rb_node **p = &root->rb_node;
537 struct rb_node *parent = NULL;
538 struct hist_entry *iter;
539
540 while (*p != NULL) {
541 parent = *p;
542 iter = rb_entry(parent, struct hist_entry, rb_node);
543 if (hist_entry__cmp_compute(he, iter, c) < 0)
544 p = &(*p)->rb_left;
545 else
546 p = &(*p)->rb_right;
547 }
548
549 rb_link_node(&he->rb_node, parent, p);
550 rb_insert_color(&he->rb_node, root);
551}
552
553static void hists__compute_resort(struct hists *hists)
554{
Namhyung Kim66f97ed2012-12-10 17:29:56 +0900555 struct rb_root *root;
556 struct rb_node *next;
557
558 if (sort__need_collapse)
559 root = &hists->entries_collapsed;
560 else
561 root = hists->entries_in;
562
563 hists->entries = RB_ROOT;
564 next = rb_first(root);
565
566 hists->nr_entries = 0;
567 hists->stats.total_period = 0;
568 hists__reset_col_len(hists);
Jiri Olsa96c47f12012-10-05 16:44:42 +0200569
570 while (next != NULL) {
Namhyung Kim66f97ed2012-12-10 17:29:56 +0900571 struct hist_entry *he;
Jiri Olsa96c47f12012-10-05 16:44:42 +0200572
Namhyung Kim66f97ed2012-12-10 17:29:56 +0900573 he = rb_entry(next, struct hist_entry, rb_node_in);
574 next = rb_next(&he->rb_node_in);
Jiri Olsa96c47f12012-10-05 16:44:42 +0200575
Namhyung Kim66f97ed2012-12-10 17:29:56 +0900576 insert_hist_entry_by_compute(&hists->entries, he, compute);
577 hists__inc_nr_entries(hists, he);
Jiri Olsa96c47f12012-10-05 16:44:42 +0200578 }
Jiri Olsa96c47f12012-10-05 16:44:42 +0200579}
580
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100581static void hists__process(struct hists *hists)
Jiri Olsaa06d1432012-10-05 16:44:40 +0200582{
Jiri Olsaa06d1432012-10-05 16:44:40 +0200583 if (show_baseline_only)
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100584 hists__baseline_only(hists);
Jiri Olsaa06d1432012-10-05 16:44:40 +0200585
Jiri Olsa96c47f12012-10-05 16:44:42 +0200586 if (sort_compute) {
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100587 hists__precompute(hists);
588 hists__compute_resort(hists);
Namhyung Kim66f97ed2012-12-10 17:29:56 +0900589 } else {
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100590 hists__output_resort(hists);
Jiri Olsa96c47f12012-10-05 16:44:42 +0200591 }
592
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100593 hists__fprintf(hists, true, 0, 0, 0, stdout);
Jiri Olsaa06d1432012-10-05 16:44:40 +0200594}
595
Jiri Olsa1d81c7f2012-12-01 21:56:03 +0100596static void data__fprintf(void)
597{
598 struct data__file *d;
599 int i;
600
601 fprintf(stdout, "# Data files:\n");
602
603 data__for_each_file(i, d)
604 fprintf(stdout, "# [%d] %s %s\n",
Jiri Olsaf5fc1412013-10-15 16:27:32 +0200605 d->idx, d->file.path,
Jiri Olsa1d81c7f2012-12-01 21:56:03 +0100606 !d->idx ? "(Baseline)" : "");
607
608 fprintf(stdout, "#\n");
609}
610
Jiri Olsaec308422013-03-25 00:02:01 +0100611static void data_process(void)
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200612{
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100613 struct perf_evlist *evlist_base = data__files[0].session->evlist;
614 struct perf_evsel *evsel_base;
Jiri Olsa863e4512012-09-06 17:46:55 +0200615 bool first = true;
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200616
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100617 list_for_each_entry(evsel_base, &evlist_base->entries, node) {
618 struct data__file *d;
619 int i;
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200620
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100621 data__for_each_file_new(i, d) {
622 struct perf_evlist *evlist = d->session->evlist;
623 struct perf_evsel *evsel;
624
625 evsel = evsel_match(evsel_base, evlist);
626 if (!evsel)
627 continue;
628
629 d->hists = &evsel->hists;
630
631 hists__match(&evsel_base->hists, &evsel->hists);
632
633 if (!show_baseline_only)
634 hists__link(&evsel_base->hists,
635 &evsel->hists);
636 }
Jiri Olsa863e4512012-09-06 17:46:55 +0200637
638 fprintf(stdout, "%s# Event '%s'\n#\n", first ? "" : "\n",
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100639 perf_evsel__name(evsel_base));
Jiri Olsa863e4512012-09-06 17:46:55 +0200640
641 first = false;
642
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100643 if (verbose || data__files_cnt > 2)
Jiri Olsa1d81c7f2012-12-01 21:56:03 +0100644 data__fprintf();
645
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100646 hists__process(&evsel_base->hists);
Jiri Olsaec308422013-03-25 00:02:01 +0100647 }
648}
649
Jiri Olsac818b492012-12-01 21:57:04 +0100650static void data__free(struct data__file *d)
651{
652 int col;
653
654 for (col = 0; col < PERF_HPP_DIFF__MAX_INDEX; col++) {
655 struct diff_hpp_fmt *fmt = &d->fmt[col];
656
657 free(fmt->header);
658 }
659}
660
Jiri Olsaec308422013-03-25 00:02:01 +0100661static int __cmd_diff(void)
662{
663 struct data__file *d;
664 int ret = -EINVAL, i;
665
666 data__for_each_file(i, d) {
Jiri Olsaf5fc1412013-10-15 16:27:32 +0200667 d->session = perf_session__new(&d->file, false, &tool);
Jiri Olsaec308422013-03-25 00:02:01 +0100668 if (!d->session) {
Jiri Olsaf5fc1412013-10-15 16:27:32 +0200669 pr_err("Failed to open %s\n", d->file.path);
Jiri Olsaec308422013-03-25 00:02:01 +0100670 ret = -ENOMEM;
671 goto out_delete;
672 }
673
674 ret = perf_session__process_events(d->session, &tool);
675 if (ret) {
Jiri Olsaf5fc1412013-10-15 16:27:32 +0200676 pr_err("Failed to process %s\n", d->file.path);
Jiri Olsaec308422013-03-25 00:02:01 +0100677 goto out_delete;
678 }
679
680 perf_evlist__collapse_resort(d->session->evlist);
Jiri Olsa863e4512012-09-06 17:46:55 +0200681 }
682
Jiri Olsaec308422013-03-25 00:02:01 +0100683 data_process();
684
685 out_delete:
686 data__for_each_file(i, d) {
687 if (d->session)
688 perf_session__delete(d->session);
Jiri Olsac818b492012-12-01 21:57:04 +0100689
690 data__free(d);
Jiri Olsaec308422013-03-25 00:02:01 +0100691 }
692
693 free(data__files);
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200694 return ret;
695}
696
Arnaldo Carvalho de Melo0422a4f2009-12-18 16:35:58 -0200697static const char * const diff_usage[] = {
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200698 "perf diff [<options>] [old_file] [new_file]",
Arnaldo Carvalho de Melo0422a4f2009-12-18 16:35:58 -0200699 NULL,
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200700};
701
702static const struct option options[] = {
Ian Munsiec0555642010-04-13 18:37:33 +1000703 OPT_INCR('v', "verbose", &verbose,
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200704 "be more verbose (show symbol address, etc)"),
Jiri Olsaa06d1432012-10-05 16:44:40 +0200705 OPT_BOOLEAN('b', "baseline-only", &show_baseline_only,
706 "Show only items with match in baseline"),
Jiri Olsa81d5f952012-10-05 16:44:43 +0200707 OPT_CALLBACK('c', "compute", &compute,
708 "delta,ratio,wdiff:w1,w2 (default delta)",
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200709 "Entries differential computation selection",
710 setup_compute),
Jiri Olsa61949b22012-10-05 16:44:44 +0200711 OPT_BOOLEAN('p', "period", &show_period,
712 "Show period values."),
Jiri Olsaed279da2012-10-05 16:44:45 +0200713 OPT_BOOLEAN('F', "formula", &show_formula,
714 "Show formula."),
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200715 OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
716 "dump raw trace in ASCII"),
717 OPT_BOOLEAN('f', "force", &force, "don't complain, do it"),
718 OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
719 "load module symbols - WARNING: use only with -k and LIVE kernel"),
Arnaldo Carvalho de Meloc410a332009-12-15 20:04:41 -0200720 OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
721 "only consider symbols in these dsos"),
722 OPT_STRING('C', "comms", &symbol_conf.comm_list_str, "comm[,comm...]",
723 "only consider symbols in these comms"),
724 OPT_STRING('S', "symbols", &symbol_conf.sym_list_str, "symbol[,symbol...]",
725 "only consider these symbols"),
Arnaldo Carvalho de Meloc351c282009-12-16 13:49:27 -0200726 OPT_STRING('s', "sort", &sort_order, "key[,key2...]",
727 "sort by key(s): pid, comm, dso, symbol, parent"),
728 OPT_STRING('t', "field-separator", &symbol_conf.field_sep, "separator",
729 "separator for columns, no spaces will be added between "
730 "columns '.' is reserved."),
David Ahernec5761e2010-12-09 13:27:07 -0700731 OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
732 "Look for files with symbols relative to this directory"),
Jiri Olsa5f3f8d32012-11-25 23:10:20 +0100733 OPT_UINTEGER('o', "order", &sort_compute, "Specify compute sorting."),
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200734 OPT_END()
735};
736
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100737static double baseline_percent(struct hist_entry *he)
Jiri Olsa1d778222012-10-04 21:49:39 +0900738{
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100739 struct hists *hists = he->hists;
740 return 100.0 * he->stat.period / hists->stats.total_period;
741}
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200742
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100743static int hpp__color_baseline(struct perf_hpp_fmt *fmt,
744 struct perf_hpp *hpp, struct hist_entry *he)
745{
746 struct diff_hpp_fmt *dfmt =
747 container_of(fmt, struct diff_hpp_fmt, fmt);
748 double percent = baseline_percent(he);
749 char pfmt[20] = " ";
750
751 if (!he->dummy) {
752 scnprintf(pfmt, 20, "%%%d.2f%%%%", dfmt->header_width - 1);
753 return percent_color_snprintf(hpp->buf, hpp->size,
754 pfmt, percent);
755 } else
756 return scnprintf(hpp->buf, hpp->size, "%*s",
757 dfmt->header_width, pfmt);
758}
759
760static int hpp__entry_baseline(struct hist_entry *he, char *buf, size_t size)
761{
762 double percent = baseline_percent(he);
763 const char *fmt = symbol_conf.field_sep ? "%.2f" : "%6.2f%%";
764 int ret = 0;
765
766 if (!he->dummy)
767 ret = scnprintf(buf, size, fmt, percent);
768
769 return ret;
770}
771
772static void
773hpp__entry_unpair(struct hist_entry *he, int idx, char *buf, size_t size)
774{
775 switch (idx) {
776 case PERF_HPP_DIFF__PERIOD_BASELINE:
777 scnprintf(buf, size, "%" PRIu64, he->stat.period);
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200778 break;
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100779
780 default:
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200781 break;
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100782 }
783}
784
785static void
786hpp__entry_pair(struct hist_entry *he, struct hist_entry *pair,
787 int idx, char *buf, size_t size)
788{
789 double diff;
790 double ratio;
791 s64 wdiff;
792
793 switch (idx) {
794 case PERF_HPP_DIFF__DELTA:
795 if (pair->diff.computed)
796 diff = pair->diff.period_ratio_delta;
797 else
Jiri Olsaef358e62012-10-21 23:31:51 +0200798 diff = compute_delta(he, pair);
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100799
800 if (fabs(diff) >= 0.01)
801 scnprintf(buf, size, "%+4.2F%%", diff);
Jiri Olsa81d5f952012-10-05 16:44:43 +0200802 break;
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100803
804 case PERF_HPP_DIFF__RATIO:
805 /* No point for ratio number if we are dummy.. */
806 if (he->dummy)
807 break;
808
809 if (pair->diff.computed)
810 ratio = pair->diff.period_ratio;
811 else
Jiri Olsaef358e62012-10-21 23:31:51 +0200812 ratio = compute_ratio(he, pair);
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100813
814 if (ratio > 0.0)
815 scnprintf(buf, size, "%14.6F", ratio);
816 break;
817
818 case PERF_HPP_DIFF__WEIGHTED_DIFF:
819 /* No point for wdiff number if we are dummy.. */
820 if (he->dummy)
821 break;
822
823 if (pair->diff.computed)
824 wdiff = pair->diff.wdiff;
825 else
Jiri Olsaef358e62012-10-21 23:31:51 +0200826 wdiff = compute_wdiff(he, pair);
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100827
828 if (wdiff != 0)
829 scnprintf(buf, size, "%14ld", wdiff);
830 break;
831
832 case PERF_HPP_DIFF__FORMULA:
Jiri Olsaef358e62012-10-21 23:31:51 +0200833 formula_fprintf(he, pair, buf, size);
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100834 break;
835
836 case PERF_HPP_DIFF__PERIOD:
837 scnprintf(buf, size, "%" PRIu64, pair->stat.period);
838 break;
839
Jiri Olsa7aaf6b32012-10-05 16:44:41 +0200840 default:
841 BUG_ON(1);
842 };
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100843}
844
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100845static void
846__hpp__entry_global(struct hist_entry *he, struct diff_hpp_fmt *dfmt,
847 char *buf, size_t size)
848{
Jiri Olsa5f3f8d32012-11-25 23:10:20 +0100849 struct hist_entry *pair = get_pair_fmt(he, dfmt);
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100850 int idx = dfmt->idx;
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100851
852 /* baseline is special */
853 if (idx == PERF_HPP_DIFF__BASELINE)
854 hpp__entry_baseline(he, buf, size);
855 else {
856 if (pair)
857 hpp__entry_pair(he, pair, idx, buf, size);
858 else
859 hpp__entry_unpair(he, idx, buf, size);
860 }
861}
862
863static int hpp__entry_global(struct perf_hpp_fmt *_fmt, struct perf_hpp *hpp,
864 struct hist_entry *he)
865{
866 struct diff_hpp_fmt *dfmt =
867 container_of(_fmt, struct diff_hpp_fmt, fmt);
868 char buf[MAX_COL_WIDTH] = " ";
869
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100870 __hpp__entry_global(he, dfmt, buf, MAX_COL_WIDTH);
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100871
872 if (symbol_conf.field_sep)
873 return scnprintf(hpp->buf, hpp->size, "%s", buf);
874 else
875 return scnprintf(hpp->buf, hpp->size, "%*s",
876 dfmt->header_width, buf);
877}
878
879static int hpp__header(struct perf_hpp_fmt *fmt,
880 struct perf_hpp *hpp)
881{
882 struct diff_hpp_fmt *dfmt =
883 container_of(fmt, struct diff_hpp_fmt, fmt);
884
885 BUG_ON(!dfmt->header);
886 return scnprintf(hpp->buf, hpp->size, dfmt->header);
887}
888
889static int hpp__width(struct perf_hpp_fmt *fmt,
890 struct perf_hpp *hpp __maybe_unused)
891{
892 struct diff_hpp_fmt *dfmt =
893 container_of(fmt, struct diff_hpp_fmt, fmt);
894
895 BUG_ON(dfmt->header_width <= 0);
896 return dfmt->header_width;
897}
898
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100899static void init_header(struct data__file *d, struct diff_hpp_fmt *dfmt)
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100900{
901#define MAX_HEADER_NAME 100
902 char buf_indent[MAX_HEADER_NAME];
903 char buf[MAX_HEADER_NAME];
904 const char *header = NULL;
905 int width = 0;
906
907 BUG_ON(dfmt->idx >= PERF_HPP_DIFF__MAX_INDEX);
908 header = columns[dfmt->idx].name;
909 width = columns[dfmt->idx].width;
910
911 /* Only our defined HPP fmts should appear here. */
912 BUG_ON(!header);
913
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100914 if (data__files_cnt > 2)
915 scnprintf(buf, MAX_HEADER_NAME, "%s/%d", header, d->idx);
916
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100917#define NAME (data__files_cnt > 2 ? buf : header)
918 dfmt->header_width = width;
919 width = (int) strlen(NAME);
920 if (dfmt->header_width < width)
921 dfmt->header_width = width;
922
923 scnprintf(buf_indent, MAX_HEADER_NAME, "%*s",
924 dfmt->header_width, NAME);
925
926 dfmt->header = strdup(buf_indent);
927#undef MAX_HEADER_NAME
928#undef NAME
929}
930
Jiri Olsac818b492012-12-01 21:57:04 +0100931static void data__hpp_register(struct data__file *d, int idx)
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100932{
Jiri Olsac818b492012-12-01 21:57:04 +0100933 struct diff_hpp_fmt *dfmt = &d->fmt[idx];
934 struct perf_hpp_fmt *fmt = &dfmt->fmt;
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100935
Jiri Olsac818b492012-12-01 21:57:04 +0100936 dfmt->idx = idx;
937
938 fmt->header = hpp__header;
939 fmt->width = hpp__width;
940 fmt->entry = hpp__entry_global;
941
942 /* TODO more colors */
943 if (idx == PERF_HPP_DIFF__BASELINE)
944 fmt->color = hpp__color_baseline;
945
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100946 init_header(d, dfmt);
Jiri Olsac818b492012-12-01 21:57:04 +0100947 perf_hpp__column_register(fmt);
Jiri Olsa345dc0b2013-02-03 20:08:34 +0100948}
949
950static void ui_init(void)
951{
Jiri Olsac818b492012-12-01 21:57:04 +0100952 struct data__file *d;
953 int i;
Jiri Olsa1d778222012-10-04 21:49:39 +0900954
Jiri Olsac818b492012-12-01 21:57:04 +0100955 data__for_each_file(i, d) {
Jiri Olsaed279da2012-10-05 16:44:45 +0200956
Jiri Olsac818b492012-12-01 21:57:04 +0100957 /*
958 * Baseline or compute realted columns:
959 *
960 * PERF_HPP_DIFF__BASELINE
961 * PERF_HPP_DIFF__DELTA
962 * PERF_HPP_DIFF__RATIO
963 * PERF_HPP_DIFF__WEIGHTED_DIFF
964 */
965 data__hpp_register(d, i ? compute_2_hpp[compute] :
966 PERF_HPP_DIFF__BASELINE);
967
968 /*
969 * And the rest:
970 *
971 * PERF_HPP_DIFF__FORMULA
972 * PERF_HPP_DIFF__PERIOD
973 * PERF_HPP_DIFF__PERIOD_BASELINE
974 */
975 if (show_formula && i)
976 data__hpp_register(d, PERF_HPP_DIFF__FORMULA);
977
978 if (show_period)
979 data__hpp_register(d, i ? PERF_HPP_DIFF__PERIOD :
980 PERF_HPP_DIFF__PERIOD_BASELINE);
Jiri Olsa61949b22012-10-05 16:44:44 +0200981 }
Jiri Olsa1d778222012-10-04 21:49:39 +0900982}
983
Jiri Olsaec308422013-03-25 00:02:01 +0100984static int data_init(int argc, const char **argv)
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200985{
Jiri Olsaec308422013-03-25 00:02:01 +0100986 struct data__file *d;
987 static const char *defaults[] = {
988 "perf.data.old",
989 "perf.data",
990 };
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100991 bool use_default = true;
Jiri Olsaec308422013-03-25 00:02:01 +0100992 int i;
993
994 data__files_cnt = 2;
995
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -0200996 if (argc) {
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100997 if (argc == 1)
Jiri Olsaec308422013-03-25 00:02:01 +0100998 defaults[1] = argv[0];
Jiri Olsa22aeb7f2012-12-01 22:00:00 +0100999 else {
1000 data__files_cnt = argc;
1001 use_default = false;
1002 }
Zhang, Yanmina1645ce2010-04-19 13:32:50 +08001003 } else if (symbol_conf.default_guest_vmlinux_name ||
1004 symbol_conf.default_guest_kallsyms) {
Jiri Olsaec308422013-03-25 00:02:01 +01001005 defaults[0] = "perf.data.host";
1006 defaults[1] = "perf.data.guest";
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -02001007 }
1008
Jiri Olsa5f3f8d32012-11-25 23:10:20 +01001009 if (sort_compute >= (unsigned int) data__files_cnt) {
1010 pr_err("Order option out of limit.\n");
1011 return -EINVAL;
1012 }
1013
Jiri Olsaec308422013-03-25 00:02:01 +01001014 data__files = zalloc(sizeof(*data__files) * data__files_cnt);
1015 if (!data__files)
1016 return -ENOMEM;
1017
1018 data__for_each_file(i, d) {
Jiri Olsaf5fc1412013-10-15 16:27:32 +02001019 struct perf_data_file *file = &d->file;
1020
1021 file->path = use_default ? defaults[i] : argv[i];
1022 file->mode = PERF_DATA_MODE_READ,
1023 file->force = force,
1024
Jiri Olsaec308422013-03-25 00:02:01 +01001025 d->idx = i;
1026 }
1027
1028 return 0;
1029}
1030
1031int cmd_diff(int argc, const char **argv, const char *prefix __maybe_unused)
1032{
1033 sort_order = diff__default_sort_order;
1034 argc = parse_options(argc, argv, options, diff_usage, 0);
1035
Arnaldo Carvalho de Melo655000e2009-12-15 20:04:40 -02001036 if (symbol__init() < 0)
1037 return -1;
1038
Jiri Olsaec308422013-03-25 00:02:01 +01001039 if (data_init(argc, argv) < 0)
1040 return -1;
1041
Jiri Olsa1d778222012-10-04 21:49:39 +09001042 ui_init();
1043
Namhyung Kim55309982013-02-06 14:57:16 +09001044 if (setup_sorting() < 0)
1045 usage_with_options(diff_usage, options);
1046
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -02001047 setup_pager();
Arnaldo Carvalho de Meloc351c282009-12-16 13:49:27 -02001048
Namhyung Kim08e71542013-04-03 21:26:19 +09001049 sort__setup_elide(NULL);
Arnaldo Carvalho de Meloc351c282009-12-16 13:49:27 -02001050
Arnaldo Carvalho de Melo86a9eee2009-12-14 20:09:31 -02001051 return __cmd_diff();
1052}