1 // SPDX-License-Identifier: GPL-2.0
10 #include <linux/kernel.h>
11 #include "map_symbol.h"
12 #include "mem-events.h"
16 unsigned int perf_mem_events__loads_ldlat = 30;
18 #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s }
20 static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = {
21 E("ldlat-loads", "cpu/mem-loads,ldlat=%u/P", "cpu/events/mem-loads"),
22 E("ldlat-stores", "cpu/mem-stores/P", "cpu/events/mem-stores"),
29 static char mem_loads_name[100];
30 static bool mem_loads_name__init;
32 struct perf_mem_event * __weak perf_mem_events__ptr(int i)
34 if (i >= PERF_MEM_EVENTS__MAX)
37 return &perf_mem_events[i];
40 char * __weak perf_mem_events__name(int i)
42 struct perf_mem_event *e = perf_mem_events__ptr(i);
47 if (i == PERF_MEM_EVENTS__LOAD) {
48 if (!mem_loads_name__init) {
49 mem_loads_name__init = true;
50 scnprintf(mem_loads_name, sizeof(mem_loads_name),
51 e->name, perf_mem_events__loads_ldlat);
53 return mem_loads_name;
56 return (char *)e->name;
59 int perf_mem_events__parse(const char *str)
61 char *tok, *saveptr = NULL;
66 /* We need buffer that we know we can write to. */
67 buf = malloc(strlen(str) + 1);
73 tok = strtok_r((char *)buf, ",", &saveptr);
76 for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
77 struct perf_mem_event *e = perf_mem_events__ptr(j);
82 if (strstr(e->tag, tok))
83 e->record = found = true;
86 tok = strtok_r(NULL, ",", &saveptr);
94 pr_err("failed: event '%s' not found, use '-e list' to get list of available events\n", str);
98 int perf_mem_events__init(void)
100 const char *mnt = sysfs__mount();
107 for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
109 struct perf_mem_event *e = perf_mem_events__ptr(j);
113 * If the event entry isn't valid, skip initialization
114 * and "e->supported" will keep false.
119 scnprintf(path, PATH_MAX, "%s/devices/%s",
122 if (!stat(path, &st))
123 e->supported = found = true;
126 return found ? 0 : -ENOENT;
129 void perf_mem_events__list(void)
133 for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) {
134 struct perf_mem_event *e = perf_mem_events__ptr(j);
136 fprintf(stderr, "%-13s%-*s%s\n",
138 verbose > 0 ? 25 : 0,
139 verbose > 0 ? perf_mem_events__name(j) : "",
140 e->supported ? ": available" : "");
144 static const char * const tlb_access[] = {
154 int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
157 u64 m = PERF_MEM_TLB_NA;
160 sz -= 1; /* -1 for null termination */
164 m = mem_info->data_src.mem_dtlb;
166 hit = m & PERF_MEM_TLB_HIT;
167 miss = m & PERF_MEM_TLB_MISS;
169 /* already taken care of */
170 m &= ~(PERF_MEM_TLB_HIT|PERF_MEM_TLB_MISS);
172 for (i = 0; m && i < ARRAY_SIZE(tlb_access); i++, m >>= 1) {
179 l += scnprintf(out + l, sz - l, tlb_access[i]);
182 l += scnprintf(out, sz - l, "N/A");
184 l += scnprintf(out + l, sz - l, " hit");
186 l += scnprintf(out + l, sz - l, " miss");
191 static const char * const mem_lvl[] = {
200 "Remote RAM (1 hop)",
201 "Remote RAM (2 hops)",
202 "Remote Cache (1 hop)",
203 "Remote Cache (2 hops)",
208 static const char * const mem_lvlnum[] = {
209 [PERF_MEM_LVLNUM_ANY_CACHE] = "Any cache",
210 [PERF_MEM_LVLNUM_LFB] = "LFB",
211 [PERF_MEM_LVLNUM_RAM] = "RAM",
212 [PERF_MEM_LVLNUM_PMEM] = "PMEM",
213 [PERF_MEM_LVLNUM_NA] = "N/A",
216 int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
219 u64 m = PERF_MEM_LVL_NA;
224 m = mem_info->data_src.mem_lvl;
226 sz -= 1; /* -1 for null termination */
229 hit = m & PERF_MEM_LVL_HIT;
230 miss = m & PERF_MEM_LVL_MISS;
232 /* already taken care of */
233 m &= ~(PERF_MEM_LVL_HIT|PERF_MEM_LVL_MISS);
236 if (mem_info && mem_info->data_src.mem_remote) {
237 strcat(out, "Remote ");
242 for (i = 0; m && i < ARRAY_SIZE(mem_lvl); i++, m >>= 1) {
249 l += scnprintf(out + l, sz - l, mem_lvl[i]);
252 if (mem_info && mem_info->data_src.mem_lvl_num) {
253 int lvl = mem_info->data_src.mem_lvl_num;
259 l += scnprintf(out + l, sz - l, mem_lvlnum[lvl]);
261 l += scnprintf(out + l, sz - l, "L%d", lvl);
265 l += scnprintf(out + l, sz - l, "N/A");
267 l += scnprintf(out + l, sz - l, " hit");
269 l += scnprintf(out + l, sz - l, " miss");
274 static const char * const snoop_access[] = {
282 int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
285 u64 m = PERF_MEM_SNOOP_NA;
287 sz -= 1; /* -1 for null termination */
291 m = mem_info->data_src.mem_snoop;
293 for (i = 0; m && i < ARRAY_SIZE(snoop_access); i++, m >>= 1) {
300 l += scnprintf(out + l, sz - l, snoop_access[i]);
303 (mem_info->data_src.mem_snoopx & PERF_MEM_SNOOPX_FWD)) {
308 l += scnprintf(out + l, sz - l, "Fwd");
312 l += scnprintf(out, sz - l, "N/A");
317 int perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
319 u64 mask = PERF_MEM_LOCK_NA;
323 mask = mem_info->data_src.mem_lock;
325 if (mask & PERF_MEM_LOCK_NA)
326 l = scnprintf(out, sz, "N/A");
327 else if (mask & PERF_MEM_LOCK_LOCKED)
328 l = scnprintf(out, sz, "Yes");
330 l = scnprintf(out, sz, "No");
335 int perf_script__meminfo_scnprintf(char *out, size_t sz, struct mem_info *mem_info)
339 i += perf_mem__lvl_scnprintf(out, sz, mem_info);
340 i += scnprintf(out + i, sz - i, "|SNP ");
341 i += perf_mem__snp_scnprintf(out + i, sz - i, mem_info);
342 i += scnprintf(out + i, sz - i, "|TLB ");
343 i += perf_mem__tlb_scnprintf(out + i, sz - i, mem_info);
344 i += scnprintf(out + i, sz - i, "|LCK ");
345 i += perf_mem__lck_scnprintf(out + i, sz - i, mem_info);
350 int c2c_decode_stats(struct c2c_stats *stats, struct mem_info *mi)
352 union perf_mem_data_src *data_src = &mi->data_src;
353 u64 daddr = mi->daddr.addr;
354 u64 op = data_src->mem_op;
355 u64 lvl = data_src->mem_lvl;
356 u64 snoop = data_src->mem_snoop;
357 u64 lock = data_src->mem_lock;
359 * Skylake might report unknown remote level via this
360 * bit, consider it when evaluating remote HITMs.
362 bool mrem = data_src->mem_remote;
365 #define HITM_INC(__f) \
371 #define P(a, b) PERF_MEM_##a##_##b
375 if (lock & P(LOCK, LOCKED)) stats->locks++;
377 if (op & P(OP, LOAD)) {
386 if (lvl & P(LVL, HIT)) {
387 if (lvl & P(LVL, UNC)) stats->ld_uncache++;
388 if (lvl & P(LVL, IO)) stats->ld_io++;
389 if (lvl & P(LVL, LFB)) stats->ld_fbhit++;
390 if (lvl & P(LVL, L1 )) stats->ld_l1hit++;
391 if (lvl & P(LVL, L2 )) stats->ld_l2hit++;
392 if (lvl & P(LVL, L3 )) {
393 if (snoop & P(SNOOP, HITM))
399 if (lvl & P(LVL, LOC_RAM)) {
401 if (snoop & P(SNOOP, HIT))
407 if ((lvl & P(LVL, REM_RAM1)) ||
408 (lvl & P(LVL, REM_RAM2)) ||
411 if (snoop & P(SNOOP, HIT))
418 if ((lvl & P(LVL, REM_CCE1)) ||
419 (lvl & P(LVL, REM_CCE2)) ||
421 if (snoop & P(SNOOP, HIT))
423 else if (snoop & P(SNOOP, HITM))
427 if ((lvl & P(LVL, MISS)))
430 } else if (op & P(OP, STORE)) {
439 if (lvl & P(LVL, HIT)) {
440 if (lvl & P(LVL, UNC)) stats->st_uncache++;
441 if (lvl & P(LVL, L1 )) stats->st_l1hit++;
443 if (lvl & P(LVL, MISS))
444 if (lvl & P(LVL, L1)) stats->st_l1miss++;
446 /* unparsable data_src? */
451 if (!mi->daddr.ms.map || !mi->iaddr.ms.map) {
461 void c2c_add_stats(struct c2c_stats *stats, struct c2c_stats *add)
463 stats->nr_entries += add->nr_entries;
465 stats->locks += add->locks;
466 stats->store += add->store;
467 stats->st_uncache += add->st_uncache;
468 stats->st_noadrs += add->st_noadrs;
469 stats->st_l1hit += add->st_l1hit;
470 stats->st_l1miss += add->st_l1miss;
471 stats->load += add->load;
472 stats->ld_excl += add->ld_excl;
473 stats->ld_shared += add->ld_shared;
474 stats->ld_uncache += add->ld_uncache;
475 stats->ld_io += add->ld_io;
476 stats->ld_miss += add->ld_miss;
477 stats->ld_noadrs += add->ld_noadrs;
478 stats->ld_fbhit += add->ld_fbhit;
479 stats->ld_l1hit += add->ld_l1hit;
480 stats->ld_l2hit += add->ld_l2hit;
481 stats->ld_llchit += add->ld_llchit;
482 stats->lcl_hitm += add->lcl_hitm;
483 stats->rmt_hitm += add->rmt_hitm;
484 stats->tot_hitm += add->tot_hitm;
485 stats->rmt_hit += add->rmt_hit;
486 stats->lcl_dram += add->lcl_dram;
487 stats->rmt_dram += add->rmt_dram;
488 stats->nomap += add->nomap;
489 stats->noparse += add->noparse;