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0007ecea | 1 | #include <math.h> |
0007ecea | 2 | #include "stat.h" |
24e34f68 | 3 | #include "evlist.h" |
e2f56da1 | 4 | #include "evsel.h" |
24e34f68 | 5 | #include "thread_map.h" |
0007ecea XG |
6 | |
7 | void update_stats(struct stats *stats, u64 val) | |
8 | { | |
9 | double delta; | |
10 | ||
11 | stats->n++; | |
12 | delta = val - stats->mean; | |
13 | stats->mean += delta / stats->n; | |
14 | stats->M2 += delta*(val - stats->mean); | |
ffe4f3c0 DA |
15 | |
16 | if (val > stats->max) | |
17 | stats->max = val; | |
18 | ||
19 | if (val < stats->min) | |
20 | stats->min = val; | |
0007ecea XG |
21 | } |
22 | ||
23 | double avg_stats(struct stats *stats) | |
24 | { | |
25 | return stats->mean; | |
26 | } | |
27 | ||
28 | /* | |
29 | * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance | |
30 | * | |
31 | * (\Sum n_i^2) - ((\Sum n_i)^2)/n | |
32 | * s^2 = ------------------------------- | |
33 | * n - 1 | |
34 | * | |
35 | * http://en.wikipedia.org/wiki/Stddev | |
36 | * | |
37 | * The std dev of the mean is related to the std dev by: | |
38 | * | |
39 | * s | |
40 | * s_mean = ------- | |
41 | * sqrt(n) | |
42 | * | |
43 | */ | |
44 | double stddev_stats(struct stats *stats) | |
45 | { | |
46 | double variance, variance_mean; | |
47 | ||
45528f7c | 48 | if (stats->n < 2) |
0007ecea XG |
49 | return 0.0; |
50 | ||
51 | variance = stats->M2 / (stats->n - 1); | |
52 | variance_mean = variance / stats->n; | |
53 | ||
54 | return sqrt(variance_mean); | |
55 | } | |
56 | ||
57 | double rel_stddev_stats(double stddev, double avg) | |
58 | { | |
59 | double pct = 0.0; | |
60 | ||
61 | if (avg) | |
62 | pct = 100.0 * stddev/avg; | |
63 | ||
64 | return pct; | |
65 | } | |
e2f56da1 JO |
66 | |
67 | bool __perf_evsel_stat__is(struct perf_evsel *evsel, | |
68 | enum perf_stat_evsel_id id) | |
69 | { | |
581cc8a2 | 70 | struct perf_stat_evsel *ps = evsel->priv; |
e2f56da1 JO |
71 | |
72 | return ps->id == id; | |
73 | } | |
74 | ||
75 | #define ID(id, name) [PERF_STAT_EVSEL_ID__##id] = #name | |
76 | static const char *id_str[PERF_STAT_EVSEL_ID__MAX] = { | |
4c358d5c JO |
77 | ID(NONE, x), |
78 | ID(CYCLES_IN_TX, cpu/cycles-t/), | |
79 | ID(TRANSACTION_START, cpu/tx-start/), | |
80 | ID(ELISION_START, cpu/el-start/), | |
81 | ID(CYCLES_IN_TX_CP, cpu/cycles-ct/), | |
239bd47f AK |
82 | ID(TOPDOWN_TOTAL_SLOTS, topdown-total-slots), |
83 | ID(TOPDOWN_SLOTS_ISSUED, topdown-slots-issued), | |
84 | ID(TOPDOWN_SLOTS_RETIRED, topdown-slots-retired), | |
85 | ID(TOPDOWN_FETCH_BUBBLES, topdown-fetch-bubbles), | |
86 | ID(TOPDOWN_RECOVERY_BUBBLES, topdown-recovery-bubbles), | |
e2f56da1 JO |
87 | }; |
88 | #undef ID | |
89 | ||
90 | void perf_stat_evsel_id_init(struct perf_evsel *evsel) | |
91 | { | |
581cc8a2 | 92 | struct perf_stat_evsel *ps = evsel->priv; |
e2f56da1 JO |
93 | int i; |
94 | ||
95 | /* ps->id is 0 hence PERF_STAT_EVSEL_ID__NONE by default */ | |
96 | ||
97 | for (i = 0; i < PERF_STAT_EVSEL_ID__MAX; i++) { | |
98 | if (!strcmp(perf_evsel__name(evsel), id_str[i])) { | |
99 | ps->id = i; | |
100 | break; | |
101 | } | |
102 | } | |
103 | } | |
a9a3a4d9 | 104 | |
86a2cf31 | 105 | static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel) |
9689edfa JO |
106 | { |
107 | int i; | |
581cc8a2 | 108 | struct perf_stat_evsel *ps = evsel->priv; |
9689edfa JO |
109 | |
110 | for (i = 0; i < 3; i++) | |
111 | init_stats(&ps->res_stats[i]); | |
112 | ||
113 | perf_stat_evsel_id_init(evsel); | |
114 | } | |
115 | ||
86a2cf31 | 116 | static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel) |
9689edfa | 117 | { |
581cc8a2 | 118 | evsel->priv = zalloc(sizeof(struct perf_stat_evsel)); |
9689edfa JO |
119 | if (evsel->priv == NULL) |
120 | return -ENOMEM; | |
121 | perf_evsel__reset_stat_priv(evsel); | |
122 | return 0; | |
123 | } | |
124 | ||
86a2cf31 | 125 | static void perf_evsel__free_stat_priv(struct perf_evsel *evsel) |
9689edfa JO |
126 | { |
127 | zfree(&evsel->priv); | |
128 | } | |
a939512d | 129 | |
86a2cf31 JO |
130 | static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel, |
131 | int ncpus, int nthreads) | |
a939512d JO |
132 | { |
133 | struct perf_counts *counts; | |
134 | ||
135 | counts = perf_counts__new(ncpus, nthreads); | |
136 | if (counts) | |
137 | evsel->prev_raw_counts = counts; | |
138 | ||
139 | return counts ? 0 : -ENOMEM; | |
140 | } | |
141 | ||
86a2cf31 | 142 | static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel) |
a939512d JO |
143 | { |
144 | perf_counts__delete(evsel->prev_raw_counts); | |
145 | evsel->prev_raw_counts = NULL; | |
146 | } | |
24e34f68 | 147 | |
86a2cf31 | 148 | static int perf_evsel__alloc_stats(struct perf_evsel *evsel, bool alloc_raw) |
a7d0a102 JO |
149 | { |
150 | int ncpus = perf_evsel__nr_cpus(evsel); | |
151 | int nthreads = thread_map__nr(evsel->threads); | |
152 | ||
153 | if (perf_evsel__alloc_stat_priv(evsel) < 0 || | |
154 | perf_evsel__alloc_counts(evsel, ncpus, nthreads) < 0 || | |
155 | (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel, ncpus, nthreads) < 0)) | |
156 | return -ENOMEM; | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
24e34f68 JO |
161 | int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw) |
162 | { | |
163 | struct perf_evsel *evsel; | |
24e34f68 | 164 | |
e5cadb93 | 165 | evlist__for_each_entry(evlist, evsel) { |
a7d0a102 | 166 | if (perf_evsel__alloc_stats(evsel, alloc_raw)) |
24e34f68 JO |
167 | goto out_free; |
168 | } | |
169 | ||
170 | return 0; | |
171 | ||
172 | out_free: | |
173 | perf_evlist__free_stats(evlist); | |
174 | return -1; | |
175 | } | |
176 | ||
177 | void perf_evlist__free_stats(struct perf_evlist *evlist) | |
178 | { | |
179 | struct perf_evsel *evsel; | |
180 | ||
e5cadb93 | 181 | evlist__for_each_entry(evlist, evsel) { |
24e34f68 JO |
182 | perf_evsel__free_stat_priv(evsel); |
183 | perf_evsel__free_counts(evsel); | |
184 | perf_evsel__free_prev_raw_counts(evsel); | |
185 | } | |
186 | } | |
187 | ||
188 | void perf_evlist__reset_stats(struct perf_evlist *evlist) | |
189 | { | |
190 | struct perf_evsel *evsel; | |
191 | ||
e5cadb93 | 192 | evlist__for_each_entry(evlist, evsel) { |
24e34f68 JO |
193 | perf_evsel__reset_stat_priv(evsel); |
194 | perf_evsel__reset_counts(evsel); | |
195 | } | |
196 | } | |
f80010eb JO |
197 | |
198 | static void zero_per_pkg(struct perf_evsel *counter) | |
199 | { | |
200 | if (counter->per_pkg_mask) | |
201 | memset(counter->per_pkg_mask, 0, MAX_NR_CPUS); | |
202 | } | |
203 | ||
02d8dabc SE |
204 | static int check_per_pkg(struct perf_evsel *counter, |
205 | struct perf_counts_values *vals, int cpu, bool *skip) | |
f80010eb JO |
206 | { |
207 | unsigned long *mask = counter->per_pkg_mask; | |
208 | struct cpu_map *cpus = perf_evsel__cpus(counter); | |
209 | int s; | |
210 | ||
211 | *skip = false; | |
212 | ||
213 | if (!counter->per_pkg) | |
214 | return 0; | |
215 | ||
216 | if (cpu_map__empty(cpus)) | |
217 | return 0; | |
218 | ||
219 | if (!mask) { | |
220 | mask = zalloc(MAX_NR_CPUS); | |
221 | if (!mask) | |
222 | return -ENOMEM; | |
223 | ||
224 | counter->per_pkg_mask = mask; | |
225 | } | |
226 | ||
02d8dabc SE |
227 | /* |
228 | * we do not consider an event that has not run as a good | |
229 | * instance to mark a package as used (skip=1). Otherwise | |
230 | * we may run into a situation where the first CPU in a package | |
231 | * is not running anything, yet the second is, and this function | |
232 | * would mark the package as used after the first CPU and would | |
233 | * not read the values from the second CPU. | |
234 | */ | |
235 | if (!(vals->run && vals->ena)) | |
236 | return 0; | |
237 | ||
1fe7a300 | 238 | s = cpu_map__get_socket(cpus, cpu, NULL); |
f80010eb JO |
239 | if (s < 0) |
240 | return -1; | |
241 | ||
242 | *skip = test_and_set_bit(s, mask) == 1; | |
243 | return 0; | |
244 | } | |
245 | ||
246 | static int | |
247 | process_counter_values(struct perf_stat_config *config, struct perf_evsel *evsel, | |
248 | int cpu, int thread, | |
249 | struct perf_counts_values *count) | |
250 | { | |
251 | struct perf_counts_values *aggr = &evsel->counts->aggr; | |
252 | static struct perf_counts_values zero; | |
253 | bool skip = false; | |
254 | ||
02d8dabc | 255 | if (check_per_pkg(evsel, count, cpu, &skip)) { |
f80010eb JO |
256 | pr_err("failed to read per-pkg counter\n"); |
257 | return -1; | |
258 | } | |
259 | ||
260 | if (skip) | |
261 | count = &zero; | |
262 | ||
263 | switch (config->aggr_mode) { | |
264 | case AGGR_THREAD: | |
265 | case AGGR_CORE: | |
266 | case AGGR_SOCKET: | |
267 | case AGGR_NONE: | |
268 | if (!evsel->snapshot) | |
269 | perf_evsel__compute_deltas(evsel, cpu, thread, count); | |
270 | perf_counts_values__scale(count, config->scale, NULL); | |
271 | if (config->aggr_mode == AGGR_NONE) | |
272 | perf_stat__update_shadow_stats(evsel, count->values, cpu); | |
273 | break; | |
274 | case AGGR_GLOBAL: | |
275 | aggr->val += count->val; | |
276 | if (config->scale) { | |
277 | aggr->ena += count->ena; | |
278 | aggr->run += count->run; | |
279 | } | |
208df99e | 280 | case AGGR_UNSET: |
f80010eb JO |
281 | default: |
282 | break; | |
283 | } | |
284 | ||
285 | return 0; | |
286 | } | |
287 | ||
288 | static int process_counter_maps(struct perf_stat_config *config, | |
289 | struct perf_evsel *counter) | |
290 | { | |
291 | int nthreads = thread_map__nr(counter->threads); | |
292 | int ncpus = perf_evsel__nr_cpus(counter); | |
293 | int cpu, thread; | |
294 | ||
295 | if (counter->system_wide) | |
296 | nthreads = 1; | |
297 | ||
298 | for (thread = 0; thread < nthreads; thread++) { | |
299 | for (cpu = 0; cpu < ncpus; cpu++) { | |
300 | if (process_counter_values(config, counter, cpu, thread, | |
301 | perf_counts(counter->counts, cpu, thread))) | |
302 | return -1; | |
303 | } | |
304 | } | |
305 | ||
306 | return 0; | |
307 | } | |
308 | ||
309 | int perf_stat_process_counter(struct perf_stat_config *config, | |
310 | struct perf_evsel *counter) | |
311 | { | |
312 | struct perf_counts_values *aggr = &counter->counts->aggr; | |
581cc8a2 | 313 | struct perf_stat_evsel *ps = counter->priv; |
f80010eb | 314 | u64 *count = counter->counts->aggr.values; |
f340c5fc | 315 | u64 val; |
f80010eb JO |
316 | int i, ret; |
317 | ||
318 | aggr->val = aggr->ena = aggr->run = 0; | |
f80010eb | 319 | |
51fd2df1 JO |
320 | /* |
321 | * We calculate counter's data every interval, | |
322 | * and the display code shows ps->res_stats | |
323 | * avg value. We need to zero the stats for | |
324 | * interval mode, otherwise overall avg running | |
325 | * averages will be shown for each interval. | |
326 | */ | |
327 | if (config->interval) | |
328 | init_stats(ps->res_stats); | |
329 | ||
f80010eb JO |
330 | if (counter->per_pkg) |
331 | zero_per_pkg(counter); | |
332 | ||
333 | ret = process_counter_maps(config, counter); | |
334 | if (ret) | |
335 | return ret; | |
336 | ||
337 | if (config->aggr_mode != AGGR_GLOBAL) | |
338 | return 0; | |
339 | ||
340 | if (!counter->snapshot) | |
341 | perf_evsel__compute_deltas(counter, -1, -1, aggr); | |
342 | perf_counts_values__scale(aggr, config->scale, &counter->counts->scaled); | |
343 | ||
344 | for (i = 0; i < 3; i++) | |
345 | update_stats(&ps->res_stats[i], count[i]); | |
346 | ||
347 | if (verbose) { | |
348 | fprintf(config->output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", | |
349 | perf_evsel__name(counter), count[0], count[1], count[2]); | |
350 | } | |
351 | ||
352 | /* | |
353 | * Save the full runtime - to allow normalization during printout: | |
354 | */ | |
f340c5fc AK |
355 | val = counter->scale * *count; |
356 | perf_stat__update_shadow_stats(counter, &val, 0); | |
f80010eb JO |
357 | |
358 | return 0; | |
359 | } | |
0ea0e355 JO |
360 | |
361 | int perf_event__process_stat_event(struct perf_tool *tool __maybe_unused, | |
362 | union perf_event *event, | |
363 | struct perf_session *session) | |
364 | { | |
365 | struct perf_counts_values count; | |
366 | struct stat_event *st = &event->stat; | |
367 | struct perf_evsel *counter; | |
368 | ||
369 | count.val = st->val; | |
370 | count.ena = st->ena; | |
371 | count.run = st->run; | |
372 | ||
373 | counter = perf_evlist__id2evsel(session->evlist, st->id); | |
374 | if (!counter) { | |
375 | pr_err("Failed to resolve counter for stat event.\n"); | |
376 | return -EINVAL; | |
377 | } | |
378 | ||
379 | *perf_counts(counter->counts, st->cpu, st->thread) = count; | |
380 | counter->supported = true; | |
381 | return 0; | |
382 | } | |
e08a4564 JO |
383 | |
384 | size_t perf_event__fprintf_stat(union perf_event *event, FILE *fp) | |
385 | { | |
386 | struct stat_event *st = (struct stat_event *) event; | |
387 | size_t ret; | |
388 | ||
389 | ret = fprintf(fp, "\n... id %" PRIu64 ", cpu %d, thread %d\n", | |
390 | st->id, st->cpu, st->thread); | |
391 | ret += fprintf(fp, "... value %" PRIu64 ", enabled %" PRIu64 ", running %" PRIu64 "\n", | |
392 | st->val, st->ena, st->run); | |
393 | ||
394 | return ret; | |
395 | } | |
396 | ||
397 | size_t perf_event__fprintf_stat_round(union perf_event *event, FILE *fp) | |
398 | { | |
399 | struct stat_round_event *rd = (struct stat_round_event *)event; | |
400 | size_t ret; | |
401 | ||
402 | ret = fprintf(fp, "\n... time %" PRIu64 ", type %s\n", rd->time, | |
403 | rd->type == PERF_STAT_ROUND_TYPE__FINAL ? "FINAL" : "INTERVAL"); | |
404 | ||
405 | return ret; | |
406 | } | |
407 | ||
408 | size_t perf_event__fprintf_stat_config(union perf_event *event, FILE *fp) | |
409 | { | |
410 | struct perf_stat_config sc; | |
411 | size_t ret; | |
412 | ||
413 | perf_event__read_stat_config(&sc, &event->stat_config); | |
414 | ||
415 | ret = fprintf(fp, "\n"); | |
416 | ret += fprintf(fp, "... aggr_mode %d\n", sc.aggr_mode); | |
417 | ret += fprintf(fp, "... scale %d\n", sc.scale); | |
418 | ret += fprintf(fp, "... interval %u\n", sc.interval); | |
419 | ||
420 | return ret; | |
421 | } |