1  // SPDX-License-Identifier: GPL-2.0
2  #include <errno.h>
3  #include <linux/err.h>
4  #include <inttypes.h>
5  #include <math.h>
6  #include <string.h>
7  #include "counts.h"
8  #include "cpumap.h"
9  #include "debug.h"
10  #include "header.h"
11  #include "stat.h"
12  #include "session.h"
13  #include "target.h"
14  #include "evlist.h"
15  #include "evsel.h"
16  #include "thread_map.h"
17  #include "util/hashmap.h"
18  #include <linux/zalloc.h>
19  
update_stats(struct stats * stats,u64 val)20  void update_stats(struct stats *stats, u64 val)
21  {
22  	double delta;
23  
24  	stats->n++;
25  	delta = val - stats->mean;
26  	stats->mean += delta / stats->n;
27  	stats->M2 += delta*(val - stats->mean);
28  
29  	if (val > stats->max)
30  		stats->max = val;
31  
32  	if (val < stats->min)
33  		stats->min = val;
34  }
35  
avg_stats(struct stats * stats)36  double avg_stats(struct stats *stats)
37  {
38  	return stats->mean;
39  }
40  
41  /*
42   * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
43   *
44   *       (\Sum n_i^2) - ((\Sum n_i)^2)/n
45   * s^2 = -------------------------------
46   *                  n - 1
47   *
48   * http://en.wikipedia.org/wiki/Stddev
49   *
50   * The std dev of the mean is related to the std dev by:
51   *
52   *             s
53   * s_mean = -------
54   *          sqrt(n)
55   *
56   */
stddev_stats(struct stats * stats)57  double stddev_stats(struct stats *stats)
58  {
59  	double variance, variance_mean;
60  
61  	if (stats->n < 2)
62  		return 0.0;
63  
64  	variance = stats->M2 / (stats->n - 1);
65  	variance_mean = variance / stats->n;
66  
67  	return sqrt(variance_mean);
68  }
69  
rel_stddev_stats(double stddev,double avg)70  double rel_stddev_stats(double stddev, double avg)
71  {
72  	double pct = 0.0;
73  
74  	if (avg)
75  		pct = 100.0 * stddev/avg;
76  
77  	return pct;
78  }
79  
evsel__reset_aggr_stats(struct evsel * evsel)80  static void evsel__reset_aggr_stats(struct evsel *evsel)
81  {
82  	struct perf_stat_evsel *ps = evsel->stats;
83  	struct perf_stat_aggr *aggr = ps->aggr;
84  
85  	if (aggr)
86  		memset(aggr, 0, sizeof(*aggr) * ps->nr_aggr);
87  }
88  
evsel__reset_stat_priv(struct evsel * evsel)89  static void evsel__reset_stat_priv(struct evsel *evsel)
90  {
91  	struct perf_stat_evsel *ps = evsel->stats;
92  
93  	init_stats(&ps->res_stats);
94  	evsel__reset_aggr_stats(evsel);
95  }
96  
evsel__alloc_aggr_stats(struct evsel * evsel,int nr_aggr)97  static int evsel__alloc_aggr_stats(struct evsel *evsel, int nr_aggr)
98  {
99  	struct perf_stat_evsel *ps = evsel->stats;
100  
101  	if (ps == NULL)
102  		return 0;
103  
104  	ps->nr_aggr = nr_aggr;
105  	ps->aggr = calloc(nr_aggr, sizeof(*ps->aggr));
106  	if (ps->aggr == NULL)
107  		return -ENOMEM;
108  
109  	return 0;
110  }
111  
evlist__alloc_aggr_stats(struct evlist * evlist,int nr_aggr)112  int evlist__alloc_aggr_stats(struct evlist *evlist, int nr_aggr)
113  {
114  	struct evsel *evsel;
115  
116  	evlist__for_each_entry(evlist, evsel) {
117  		if (evsel__alloc_aggr_stats(evsel, nr_aggr) < 0)
118  			return -1;
119  	}
120  	return 0;
121  }
122  
evsel__alloc_stat_priv(struct evsel * evsel,int nr_aggr)123  static int evsel__alloc_stat_priv(struct evsel *evsel, int nr_aggr)
124  {
125  	struct perf_stat_evsel *ps;
126  
127  	ps = zalloc(sizeof(*ps));
128  	if (ps == NULL)
129  		return -ENOMEM;
130  
131  	evsel->stats = ps;
132  
133  	if (nr_aggr && evsel__alloc_aggr_stats(evsel, nr_aggr) < 0) {
134  		evsel->stats = NULL;
135  		free(ps);
136  		return -ENOMEM;
137  	}
138  
139  	evsel__reset_stat_priv(evsel);
140  	return 0;
141  }
142  
evsel__free_stat_priv(struct evsel * evsel)143  static void evsel__free_stat_priv(struct evsel *evsel)
144  {
145  	struct perf_stat_evsel *ps = evsel->stats;
146  
147  	if (ps) {
148  		zfree(&ps->aggr);
149  		zfree(&ps->group_data);
150  	}
151  	zfree(&evsel->stats);
152  }
153  
evsel__alloc_prev_raw_counts(struct evsel * evsel)154  static int evsel__alloc_prev_raw_counts(struct evsel *evsel)
155  {
156  	int cpu_map_nr = evsel__nr_cpus(evsel);
157  	int nthreads = perf_thread_map__nr(evsel->core.threads);
158  	struct perf_counts *counts;
159  
160  	counts = perf_counts__new(cpu_map_nr, nthreads);
161  	if (counts)
162  		evsel->prev_raw_counts = counts;
163  
164  	return counts ? 0 : -ENOMEM;
165  }
166  
evsel__free_prev_raw_counts(struct evsel * evsel)167  static void evsel__free_prev_raw_counts(struct evsel *evsel)
168  {
169  	perf_counts__delete(evsel->prev_raw_counts);
170  	evsel->prev_raw_counts = NULL;
171  }
172  
evsel__reset_prev_raw_counts(struct evsel * evsel)173  static void evsel__reset_prev_raw_counts(struct evsel *evsel)
174  {
175  	if (evsel->prev_raw_counts)
176  		perf_counts__reset(evsel->prev_raw_counts);
177  }
178  
evsel__alloc_stats(struct evsel * evsel,int nr_aggr,bool alloc_raw)179  static int evsel__alloc_stats(struct evsel *evsel, int nr_aggr, bool alloc_raw)
180  {
181  	if (evsel__alloc_stat_priv(evsel, nr_aggr) < 0 ||
182  	    evsel__alloc_counts(evsel) < 0 ||
183  	    (alloc_raw && evsel__alloc_prev_raw_counts(evsel) < 0))
184  		return -ENOMEM;
185  
186  	return 0;
187  }
188  
evlist__alloc_stats(struct perf_stat_config * config,struct evlist * evlist,bool alloc_raw)189  int evlist__alloc_stats(struct perf_stat_config *config,
190  			struct evlist *evlist, bool alloc_raw)
191  {
192  	struct evsel *evsel;
193  	int nr_aggr = 0;
194  
195  	if (config && config->aggr_map)
196  		nr_aggr = config->aggr_map->nr;
197  
198  	evlist__for_each_entry(evlist, evsel) {
199  		if (evsel__alloc_stats(evsel, nr_aggr, alloc_raw))
200  			goto out_free;
201  	}
202  
203  	return 0;
204  
205  out_free:
206  	evlist__free_stats(evlist);
207  	return -1;
208  }
209  
evlist__free_stats(struct evlist * evlist)210  void evlist__free_stats(struct evlist *evlist)
211  {
212  	struct evsel *evsel;
213  
214  	evlist__for_each_entry(evlist, evsel) {
215  		evsel__free_stat_priv(evsel);
216  		evsel__free_counts(evsel);
217  		evsel__free_prev_raw_counts(evsel);
218  	}
219  }
220  
evlist__reset_stats(struct evlist * evlist)221  void evlist__reset_stats(struct evlist *evlist)
222  {
223  	struct evsel *evsel;
224  
225  	evlist__for_each_entry(evlist, evsel) {
226  		evsel__reset_stat_priv(evsel);
227  		evsel__reset_counts(evsel);
228  	}
229  }
230  
evlist__reset_aggr_stats(struct evlist * evlist)231  void evlist__reset_aggr_stats(struct evlist *evlist)
232  {
233  	struct evsel *evsel;
234  
235  	evlist__for_each_entry(evlist, evsel)
236  		evsel__reset_aggr_stats(evsel);
237  }
238  
evlist__reset_prev_raw_counts(struct evlist * evlist)239  void evlist__reset_prev_raw_counts(struct evlist *evlist)
240  {
241  	struct evsel *evsel;
242  
243  	evlist__for_each_entry(evlist, evsel)
244  		evsel__reset_prev_raw_counts(evsel);
245  }
246  
evsel__copy_prev_raw_counts(struct evsel * evsel)247  static void evsel__copy_prev_raw_counts(struct evsel *evsel)
248  {
249  	int idx, nthreads = perf_thread_map__nr(evsel->core.threads);
250  
251  	for (int thread = 0; thread < nthreads; thread++) {
252  		perf_cpu_map__for_each_idx(idx, evsel__cpus(evsel)) {
253  			*perf_counts(evsel->counts, idx, thread) =
254  				*perf_counts(evsel->prev_raw_counts, idx, thread);
255  		}
256  	}
257  }
258  
evlist__copy_prev_raw_counts(struct evlist * evlist)259  void evlist__copy_prev_raw_counts(struct evlist *evlist)
260  {
261  	struct evsel *evsel;
262  
263  	evlist__for_each_entry(evlist, evsel)
264  		evsel__copy_prev_raw_counts(evsel);
265  }
266  
evsel__copy_res_stats(struct evsel * evsel)267  static void evsel__copy_res_stats(struct evsel *evsel)
268  {
269  	struct perf_stat_evsel *ps = evsel->stats;
270  
271  	/*
272  	 * For GLOBAL aggregation mode, it updates the counts for each run
273  	 * in the evsel->stats.res_stats.  See perf_stat_process_counter().
274  	 */
275  	*ps->aggr[0].counts.values = avg_stats(&ps->res_stats);
276  }
277  
evlist__copy_res_stats(struct perf_stat_config * config,struct evlist * evlist)278  void evlist__copy_res_stats(struct perf_stat_config *config, struct evlist *evlist)
279  {
280  	struct evsel *evsel;
281  
282  	if (config->aggr_mode != AGGR_GLOBAL)
283  		return;
284  
285  	evlist__for_each_entry(evlist, evsel)
286  		evsel__copy_res_stats(evsel);
287  }
288  
pkg_id_hash(long __key,void * ctx __maybe_unused)289  static size_t pkg_id_hash(long __key, void *ctx __maybe_unused)
290  {
291  	uint64_t *key = (uint64_t *) __key;
292  
293  	return *key & 0xffffffff;
294  }
295  
pkg_id_equal(long __key1,long __key2,void * ctx __maybe_unused)296  static bool pkg_id_equal(long __key1, long __key2, void *ctx __maybe_unused)
297  {
298  	uint64_t *key1 = (uint64_t *) __key1;
299  	uint64_t *key2 = (uint64_t *) __key2;
300  
301  	return *key1 == *key2;
302  }
303  
check_per_pkg(struct evsel * counter,struct perf_counts_values * vals,int cpu_map_idx,bool * skip)304  static int check_per_pkg(struct evsel *counter, struct perf_counts_values *vals,
305  			 int cpu_map_idx, bool *skip)
306  {
307  	struct hashmap *mask = counter->per_pkg_mask;
308  	struct perf_cpu_map *cpus = evsel__cpus(counter);
309  	struct perf_cpu cpu = perf_cpu_map__cpu(cpus, cpu_map_idx);
310  	int s, d, ret = 0;
311  	uint64_t *key;
312  
313  	*skip = false;
314  
315  	if (!counter->per_pkg)
316  		return 0;
317  
318  	if (perf_cpu_map__is_any_cpu_or_is_empty(cpus))
319  		return 0;
320  
321  	if (!mask) {
322  		mask = hashmap__new(pkg_id_hash, pkg_id_equal, NULL);
323  		if (IS_ERR(mask))
324  			return -ENOMEM;
325  
326  		counter->per_pkg_mask = mask;
327  	}
328  
329  	/*
330  	 * we do not consider an event that has not run as a good
331  	 * instance to mark a package as used (skip=1). Otherwise
332  	 * we may run into a situation where the first CPU in a package
333  	 * is not running anything, yet the second is, and this function
334  	 * would mark the package as used after the first CPU and would
335  	 * not read the values from the second CPU.
336  	 */
337  	if (!(vals->run && vals->ena))
338  		return 0;
339  
340  	s = cpu__get_socket_id(cpu);
341  	if (s < 0)
342  		return -1;
343  
344  	/*
345  	 * On multi-die system, die_id > 0. On no-die system, die_id = 0.
346  	 * We use hashmap(socket, die) to check the used socket+die pair.
347  	 */
348  	d = cpu__get_die_id(cpu);
349  	if (d < 0)
350  		return -1;
351  
352  	key = malloc(sizeof(*key));
353  	if (!key)
354  		return -ENOMEM;
355  
356  	*key = (uint64_t)d << 32 | s;
357  	if (hashmap__find(mask, key, NULL)) {
358  		*skip = true;
359  		free(key);
360  	} else
361  		ret = hashmap__add(mask, key, 1);
362  
363  	return ret;
364  }
365  
evsel__count_has_error(struct evsel * evsel,struct perf_counts_values * count,struct perf_stat_config * config)366  static bool evsel__count_has_error(struct evsel *evsel,
367  				   struct perf_counts_values *count,
368  				   struct perf_stat_config *config)
369  {
370  	/* the evsel was failed already */
371  	if (evsel->err || evsel->counts->scaled == -1)
372  		return true;
373  
374  	/* this is meaningful for CPU aggregation modes only */
375  	if (config->aggr_mode == AGGR_GLOBAL)
376  		return false;
377  
378  	/* it's considered ok when it actually ran */
379  	if (count->ena != 0 && count->run != 0)
380  		return false;
381  
382  	return true;
383  }
384  
385  static int
process_counter_values(struct perf_stat_config * config,struct evsel * evsel,int cpu_map_idx,int thread,struct perf_counts_values * count)386  process_counter_values(struct perf_stat_config *config, struct evsel *evsel,
387  		       int cpu_map_idx, int thread,
388  		       struct perf_counts_values *count)
389  {
390  	struct perf_stat_evsel *ps = evsel->stats;
391  	static struct perf_counts_values zero;
392  	bool skip = false;
393  
394  	if (check_per_pkg(evsel, count, cpu_map_idx, &skip)) {
395  		pr_err("failed to read per-pkg counter\n");
396  		return -1;
397  	}
398  
399  	if (skip)
400  		count = &zero;
401  
402  	if (!evsel->snapshot)
403  		evsel__compute_deltas(evsel, cpu_map_idx, thread, count);
404  	perf_counts_values__scale(count, config->scale, NULL);
405  
406  	if (config->aggr_mode == AGGR_THREAD) {
407  		struct perf_counts_values *aggr_counts = &ps->aggr[thread].counts;
408  
409  		/*
410  		 * Skip value 0 when enabling --per-thread globally,
411  		 * otherwise too many 0 output.
412  		 */
413  		if (count->val == 0 && config->system_wide)
414  			return 0;
415  
416  		ps->aggr[thread].nr++;
417  
418  		aggr_counts->val += count->val;
419  		aggr_counts->ena += count->ena;
420  		aggr_counts->run += count->run;
421  		return 0;
422  	}
423  
424  	if (ps->aggr) {
425  		struct perf_cpu cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx);
426  		struct aggr_cpu_id aggr_id = config->aggr_get_id(config, cpu);
427  		struct perf_stat_aggr *ps_aggr;
428  		int i;
429  
430  		for (i = 0; i < ps->nr_aggr; i++) {
431  			if (!aggr_cpu_id__equal(&aggr_id, &config->aggr_map->map[i]))
432  				continue;
433  
434  			ps_aggr = &ps->aggr[i];
435  			ps_aggr->nr++;
436  
437  			/*
438  			 * When any result is bad, make them all to give consistent output
439  			 * in interval mode.  But per-task counters can have 0 enabled time
440  			 * when some tasks are idle.
441  			 */
442  			if (evsel__count_has_error(evsel, count, config) && !ps_aggr->failed) {
443  				ps_aggr->counts.val = 0;
444  				ps_aggr->counts.ena = 0;
445  				ps_aggr->counts.run = 0;
446  				ps_aggr->failed = true;
447  			}
448  
449  			if (!ps_aggr->failed) {
450  				ps_aggr->counts.val += count->val;
451  				ps_aggr->counts.ena += count->ena;
452  				ps_aggr->counts.run += count->run;
453  			}
454  			break;
455  		}
456  	}
457  
458  	return 0;
459  }
460  
process_counter_maps(struct perf_stat_config * config,struct evsel * counter)461  static int process_counter_maps(struct perf_stat_config *config,
462  				struct evsel *counter)
463  {
464  	int nthreads = perf_thread_map__nr(counter->core.threads);
465  	int ncpus = evsel__nr_cpus(counter);
466  	int idx, thread;
467  
468  	for (thread = 0; thread < nthreads; thread++) {
469  		for (idx = 0; idx < ncpus; idx++) {
470  			if (process_counter_values(config, counter, idx, thread,
471  						   perf_counts(counter->counts, idx, thread)))
472  				return -1;
473  		}
474  	}
475  
476  	return 0;
477  }
478  
perf_stat_process_counter(struct perf_stat_config * config,struct evsel * counter)479  int perf_stat_process_counter(struct perf_stat_config *config,
480  			      struct evsel *counter)
481  {
482  	struct perf_stat_evsel *ps = counter->stats;
483  	u64 *count;
484  	int ret;
485  
486  	if (counter->per_pkg)
487  		evsel__zero_per_pkg(counter);
488  
489  	ret = process_counter_maps(config, counter);
490  	if (ret)
491  		return ret;
492  
493  	if (config->aggr_mode != AGGR_GLOBAL)
494  		return 0;
495  
496  	/*
497  	 * GLOBAL aggregation mode only has a single aggr counts,
498  	 * so we can use ps->aggr[0] as the actual output.
499  	 */
500  	count = ps->aggr[0].counts.values;
501  	update_stats(&ps->res_stats, *count);
502  
503  	if (verbose > 0) {
504  		fprintf(config->output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
505  			evsel__name(counter), count[0], count[1], count[2]);
506  	}
507  
508  	return 0;
509  }
510  
evsel__merge_aggr_counters(struct evsel * evsel,struct evsel * alias)511  static int evsel__merge_aggr_counters(struct evsel *evsel, struct evsel *alias)
512  {
513  	struct perf_stat_evsel *ps_a = evsel->stats;
514  	struct perf_stat_evsel *ps_b = alias->stats;
515  	int i;
516  
517  	if (ps_a->aggr == NULL && ps_b->aggr == NULL)
518  		return 0;
519  
520  	if (ps_a->nr_aggr != ps_b->nr_aggr) {
521  		pr_err("Unmatched aggregation mode between aliases\n");
522  		return -1;
523  	}
524  
525  	for (i = 0; i < ps_a->nr_aggr; i++) {
526  		struct perf_counts_values *aggr_counts_a = &ps_a->aggr[i].counts;
527  		struct perf_counts_values *aggr_counts_b = &ps_b->aggr[i].counts;
528  
529  		/* NB: don't increase aggr.nr for aliases */
530  
531  		aggr_counts_a->val += aggr_counts_b->val;
532  		aggr_counts_a->ena += aggr_counts_b->ena;
533  		aggr_counts_a->run += aggr_counts_b->run;
534  	}
535  
536  	return 0;
537  }
538  /* events should have the same name, scale, unit, cgroup but on different PMUs */
evsel__is_alias(struct evsel * evsel_a,struct evsel * evsel_b)539  static bool evsel__is_alias(struct evsel *evsel_a, struct evsel *evsel_b)
540  {
541  	if (strcmp(evsel__name(evsel_a), evsel__name(evsel_b)))
542  		return false;
543  
544  	if (evsel_a->scale != evsel_b->scale)
545  		return false;
546  
547  	if (evsel_a->cgrp != evsel_b->cgrp)
548  		return false;
549  
550  	if (strcmp(evsel_a->unit, evsel_b->unit))
551  		return false;
552  
553  	if (evsel__is_clock(evsel_a) != evsel__is_clock(evsel_b))
554  		return false;
555  
556  	return !!strcmp(evsel_a->pmu_name, evsel_b->pmu_name);
557  }
558  
evsel__merge_aliases(struct evsel * evsel)559  static void evsel__merge_aliases(struct evsel *evsel)
560  {
561  	struct evlist *evlist = evsel->evlist;
562  	struct evsel *alias;
563  
564  	alias = list_prepare_entry(evsel, &(evlist->core.entries), core.node);
565  	list_for_each_entry_continue(alias, &evlist->core.entries, core.node) {
566  		/* Merge the same events on different PMUs. */
567  		if (evsel__is_alias(evsel, alias)) {
568  			evsel__merge_aggr_counters(evsel, alias);
569  			alias->merged_stat = true;
570  		}
571  	}
572  }
573  
evsel__should_merge_hybrid(const struct evsel * evsel,const struct perf_stat_config * config)574  static bool evsel__should_merge_hybrid(const struct evsel *evsel,
575  				       const struct perf_stat_config *config)
576  {
577  	return config->hybrid_merge && evsel__is_hybrid(evsel);
578  }
579  
evsel__merge_stats(struct evsel * evsel,struct perf_stat_config * config)580  static void evsel__merge_stats(struct evsel *evsel, struct perf_stat_config *config)
581  {
582  	/* this evsel is already merged */
583  	if (evsel->merged_stat)
584  		return;
585  
586  	if (evsel->auto_merge_stats || evsel__should_merge_hybrid(evsel, config))
587  		evsel__merge_aliases(evsel);
588  }
589  
590  /* merge the same uncore and hybrid events if requested */
perf_stat_merge_counters(struct perf_stat_config * config,struct evlist * evlist)591  void perf_stat_merge_counters(struct perf_stat_config *config, struct evlist *evlist)
592  {
593  	struct evsel *evsel;
594  
595  	if (config->aggr_mode == AGGR_NONE)
596  		return;
597  
598  	evlist__for_each_entry(evlist, evsel)
599  		evsel__merge_stats(evsel, config);
600  }
601  
evsel__update_percore_stats(struct evsel * evsel,struct aggr_cpu_id * core_id)602  static void evsel__update_percore_stats(struct evsel *evsel, struct aggr_cpu_id *core_id)
603  {
604  	struct perf_stat_evsel *ps = evsel->stats;
605  	struct perf_counts_values counts = { 0, };
606  	struct aggr_cpu_id id;
607  	struct perf_cpu cpu;
608  	int idx;
609  
610  	/* collect per-core counts */
611  	perf_cpu_map__for_each_cpu(cpu, idx, evsel->core.cpus) {
612  		struct perf_stat_aggr *aggr = &ps->aggr[idx];
613  
614  		id = aggr_cpu_id__core(cpu, NULL);
615  		if (!aggr_cpu_id__equal(core_id, &id))
616  			continue;
617  
618  		counts.val += aggr->counts.val;
619  		counts.ena += aggr->counts.ena;
620  		counts.run += aggr->counts.run;
621  	}
622  
623  	/* update aggregated per-core counts for each CPU */
624  	perf_cpu_map__for_each_cpu(cpu, idx, evsel->core.cpus) {
625  		struct perf_stat_aggr *aggr = &ps->aggr[idx];
626  
627  		id = aggr_cpu_id__core(cpu, NULL);
628  		if (!aggr_cpu_id__equal(core_id, &id))
629  			continue;
630  
631  		aggr->counts.val = counts.val;
632  		aggr->counts.ena = counts.ena;
633  		aggr->counts.run = counts.run;
634  
635  		aggr->used = true;
636  	}
637  }
638  
639  /* we have an aggr_map for cpu, but want to aggregate the counters per-core */
evsel__process_percore(struct evsel * evsel)640  static void evsel__process_percore(struct evsel *evsel)
641  {
642  	struct perf_stat_evsel *ps = evsel->stats;
643  	struct aggr_cpu_id core_id;
644  	struct perf_cpu cpu;
645  	int idx;
646  
647  	if (!evsel->percore)
648  		return;
649  
650  	perf_cpu_map__for_each_cpu(cpu, idx, evsel->core.cpus) {
651  		struct perf_stat_aggr *aggr = &ps->aggr[idx];
652  
653  		if (aggr->used)
654  			continue;
655  
656  		core_id = aggr_cpu_id__core(cpu, NULL);
657  		evsel__update_percore_stats(evsel, &core_id);
658  	}
659  }
660  
661  /* process cpu stats on per-core events */
perf_stat_process_percore(struct perf_stat_config * config,struct evlist * evlist)662  void perf_stat_process_percore(struct perf_stat_config *config, struct evlist *evlist)
663  {
664  	struct evsel *evsel;
665  
666  	if (config->aggr_mode != AGGR_NONE)
667  		return;
668  
669  	evlist__for_each_entry(evlist, evsel)
670  		evsel__process_percore(evsel);
671  }
672  
perf_event__process_stat_event(struct perf_session * session,union perf_event * event)673  int perf_event__process_stat_event(struct perf_session *session,
674  				   union perf_event *event)
675  {
676  	struct perf_counts_values count, *ptr;
677  	struct perf_record_stat *st = &event->stat;
678  	struct evsel *counter;
679  	int cpu_map_idx;
680  
681  	count.val = st->val;
682  	count.ena = st->ena;
683  	count.run = st->run;
684  
685  	counter = evlist__id2evsel(session->evlist, st->id);
686  	if (!counter) {
687  		pr_err("Failed to resolve counter for stat event.\n");
688  		return -EINVAL;
689  	}
690  	cpu_map_idx = perf_cpu_map__idx(evsel__cpus(counter), (struct perf_cpu){.cpu = st->cpu});
691  	if (cpu_map_idx == -1) {
692  		pr_err("Invalid CPU %d for event %s.\n", st->cpu, evsel__name(counter));
693  		return -EINVAL;
694  	}
695  	ptr = perf_counts(counter->counts, cpu_map_idx, st->thread);
696  	if (ptr == NULL) {
697  		pr_err("Failed to find perf count for CPU %d thread %d on event %s.\n",
698  			st->cpu, st->thread, evsel__name(counter));
699  		return -EINVAL;
700  	}
701  	*ptr = count;
702  	counter->supported = true;
703  	return 0;
704  }
705  
perf_event__fprintf_stat(union perf_event * event,FILE * fp)706  size_t perf_event__fprintf_stat(union perf_event *event, FILE *fp)
707  {
708  	struct perf_record_stat *st = (struct perf_record_stat *)event;
709  	size_t ret;
710  
711  	ret  = fprintf(fp, "\n... id %" PRI_lu64 ", cpu %d, thread %d\n",
712  		       st->id, st->cpu, st->thread);
713  	ret += fprintf(fp, "... value %" PRI_lu64 ", enabled %" PRI_lu64 ", running %" PRI_lu64 "\n",
714  		       st->val, st->ena, st->run);
715  
716  	return ret;
717  }
718  
perf_event__fprintf_stat_round(union perf_event * event,FILE * fp)719  size_t perf_event__fprintf_stat_round(union perf_event *event, FILE *fp)
720  {
721  	struct perf_record_stat_round *rd = (struct perf_record_stat_round *)event;
722  	size_t ret;
723  
724  	ret = fprintf(fp, "\n... time %" PRI_lu64 ", type %s\n", rd->time,
725  		      rd->type == PERF_STAT_ROUND_TYPE__FINAL ? "FINAL" : "INTERVAL");
726  
727  	return ret;
728  }
729  
perf_event__fprintf_stat_config(union perf_event * event,FILE * fp)730  size_t perf_event__fprintf_stat_config(union perf_event *event, FILE *fp)
731  {
732  	struct perf_stat_config sc = {};
733  	size_t ret;
734  
735  	perf_event__read_stat_config(&sc, &event->stat_config);
736  
737  	ret  = fprintf(fp, "\n");
738  	ret += fprintf(fp, "... aggr_mode %d\n", sc.aggr_mode);
739  	ret += fprintf(fp, "... scale     %d\n", sc.scale);
740  	ret += fprintf(fp, "... interval  %u\n", sc.interval);
741  
742  	return ret;
743  }
744  
create_perf_stat_counter(struct evsel * evsel,struct perf_stat_config * config,struct target * target,int cpu_map_idx)745  int create_perf_stat_counter(struct evsel *evsel,
746  			     struct perf_stat_config *config,
747  			     struct target *target,
748  			     int cpu_map_idx)
749  {
750  	struct perf_event_attr *attr = &evsel->core.attr;
751  	struct evsel *leader = evsel__leader(evsel);
752  
753  	attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
754  			    PERF_FORMAT_TOTAL_TIME_RUNNING;
755  
756  	/*
757  	 * The event is part of non trivial group, let's enable
758  	 * the group read (for leader) and ID retrieval for all
759  	 * members.
760  	 */
761  	if (leader->core.nr_members > 1)
762  		attr->read_format |= PERF_FORMAT_ID|PERF_FORMAT_GROUP;
763  
764  	attr->inherit = !config->no_inherit && list_empty(&evsel->bpf_counter_list);
765  
766  	/*
767  	 * Some events get initialized with sample_(period/type) set,
768  	 * like tracepoints. Clear it up for counting.
769  	 */
770  	attr->sample_period = 0;
771  
772  	if (config->identifier)
773  		attr->sample_type = PERF_SAMPLE_IDENTIFIER;
774  
775  	if (config->all_user) {
776  		attr->exclude_kernel = 1;
777  		attr->exclude_user   = 0;
778  	}
779  
780  	if (config->all_kernel) {
781  		attr->exclude_kernel = 0;
782  		attr->exclude_user   = 1;
783  	}
784  
785  	/*
786  	 * Disabling all counters initially, they will be enabled
787  	 * either manually by us or by kernel via enable_on_exec
788  	 * set later.
789  	 */
790  	if (evsel__is_group_leader(evsel)) {
791  		attr->disabled = 1;
792  
793  		if (target__enable_on_exec(target))
794  			attr->enable_on_exec = 1;
795  	}
796  
797  	if (target__has_cpu(target) && !target__has_per_thread(target))
798  		return evsel__open_per_cpu(evsel, evsel__cpus(evsel), cpu_map_idx);
799  
800  	return evsel__open_per_thread(evsel, evsel->core.threads);
801  }
802