1 // SPDX-License-Identifier: GPL-2.0 2 #include <stddef.h> 3 #include <stdlib.h> 4 #include <string.h> 5 #include <errno.h> 6 #include <sys/types.h> 7 #include <sys/stat.h> 8 #include <unistd.h> 9 #include <api/fs/fs.h> 10 #include <linux/kernel.h> 11 #include "map_symbol.h" 12 #include "mem-events.h" 13 #include "debug.h" 14 #include "symbol.h" 15 #include "pmu.h" 16 #include "pmu-hybrid.h" 17 18 unsigned int perf_mem_events__loads_ldlat = 30; 19 20 #define E(t, n, s) { .tag = t, .name = n, .sysfs_name = s } 21 22 static struct perf_mem_event perf_mem_events[PERF_MEM_EVENTS__MAX] = { 23 E("ldlat-loads", "cpu/mem-loads,ldlat=%u/P", "cpu/events/mem-loads"), 24 E("ldlat-stores", "cpu/mem-stores/P", "cpu/events/mem-stores"), 25 E(NULL, NULL, NULL), 26 }; 27 #undef E 28 29 static char mem_loads_name[100]; 30 static bool mem_loads_name__init; 31 32 struct perf_mem_event * __weak perf_mem_events__ptr(int i) 33 { 34 if (i >= PERF_MEM_EVENTS__MAX) 35 return NULL; 36 37 return &perf_mem_events[i]; 38 } 39 40 char * __weak perf_mem_events__name(int i, char *pmu_name __maybe_unused) 41 { 42 struct perf_mem_event *e = perf_mem_events__ptr(i); 43 44 if (!e) 45 return NULL; 46 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); 52 } 53 return mem_loads_name; 54 } 55 56 return (char *)e->name; 57 } 58 59 __weak bool is_mem_loads_aux_event(struct evsel *leader __maybe_unused) 60 { 61 return false; 62 } 63 64 int perf_mem_events__parse(const char *str) 65 { 66 char *tok, *saveptr = NULL; 67 bool found = false; 68 char *buf; 69 int j; 70 71 /* We need buffer that we know we can write to. */ 72 buf = malloc(strlen(str) + 1); 73 if (!buf) 74 return -ENOMEM; 75 76 strcpy(buf, str); 77 78 tok = strtok_r((char *)buf, ",", &saveptr); 79 80 while (tok) { 81 for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { 82 struct perf_mem_event *e = perf_mem_events__ptr(j); 83 84 if (!e->tag) 85 continue; 86 87 if (strstr(e->tag, tok)) 88 e->record = found = true; 89 } 90 91 tok = strtok_r(NULL, ",", &saveptr); 92 } 93 94 free(buf); 95 96 if (found) 97 return 0; 98 99 pr_err("failed: event '%s' not found, use '-e list' to get list of available events\n", str); 100 return -1; 101 } 102 103 static bool perf_mem_event__supported(const char *mnt, char *sysfs_name) 104 { 105 char path[PATH_MAX]; 106 struct stat st; 107 108 scnprintf(path, PATH_MAX, "%s/devices/%s", mnt, sysfs_name); 109 return !stat(path, &st); 110 } 111 112 int perf_mem_events__init(void) 113 { 114 const char *mnt = sysfs__mount(); 115 bool found = false; 116 int j; 117 118 if (!mnt) 119 return -ENOENT; 120 121 for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { 122 struct perf_mem_event *e = perf_mem_events__ptr(j); 123 struct perf_pmu *pmu; 124 char sysfs_name[100]; 125 126 /* 127 * If the event entry isn't valid, skip initialization 128 * and "e->supported" will keep false. 129 */ 130 if (!e->tag) 131 continue; 132 133 if (!perf_pmu__has_hybrid()) { 134 scnprintf(sysfs_name, sizeof(sysfs_name), 135 e->sysfs_name, "cpu"); 136 e->supported = perf_mem_event__supported(mnt, sysfs_name); 137 } else { 138 perf_pmu__for_each_hybrid_pmu(pmu) { 139 scnprintf(sysfs_name, sizeof(sysfs_name), 140 e->sysfs_name, pmu->name); 141 e->supported |= perf_mem_event__supported(mnt, sysfs_name); 142 } 143 } 144 145 if (e->supported) 146 found = true; 147 } 148 149 return found ? 0 : -ENOENT; 150 } 151 152 void perf_mem_events__list(void) 153 { 154 int j; 155 156 for (j = 0; j < PERF_MEM_EVENTS__MAX; j++) { 157 struct perf_mem_event *e = perf_mem_events__ptr(j); 158 159 fprintf(stderr, "%-13s%-*s%s\n", 160 e->tag ?: "", 161 verbose > 0 ? 25 : 0, 162 verbose > 0 ? perf_mem_events__name(j, NULL) : "", 163 e->supported ? ": available" : ""); 164 } 165 } 166 167 static void perf_mem_events__print_unsupport_hybrid(struct perf_mem_event *e, 168 int idx) 169 { 170 const char *mnt = sysfs__mount(); 171 char sysfs_name[100]; 172 struct perf_pmu *pmu; 173 174 perf_pmu__for_each_hybrid_pmu(pmu) { 175 scnprintf(sysfs_name, sizeof(sysfs_name), e->sysfs_name, 176 pmu->name); 177 if (!perf_mem_event__supported(mnt, sysfs_name)) { 178 pr_err("failed: event '%s' not supported\n", 179 perf_mem_events__name(idx, pmu->name)); 180 } 181 } 182 } 183 184 int perf_mem_events__record_args(const char **rec_argv, int *argv_nr, 185 char **rec_tmp, int *tmp_nr) 186 { 187 int i = *argv_nr, k = 0; 188 struct perf_mem_event *e; 189 struct perf_pmu *pmu; 190 char *s; 191 192 for (int j = 0; j < PERF_MEM_EVENTS__MAX; j++) { 193 e = perf_mem_events__ptr(j); 194 if (!e->record) 195 continue; 196 197 if (!perf_pmu__has_hybrid()) { 198 if (!e->supported) { 199 pr_err("failed: event '%s' not supported\n", 200 perf_mem_events__name(j, NULL)); 201 return -1; 202 } 203 204 rec_argv[i++] = "-e"; 205 rec_argv[i++] = perf_mem_events__name(j, NULL); 206 } else { 207 if (!e->supported) { 208 perf_mem_events__print_unsupport_hybrid(e, j); 209 return -1; 210 } 211 212 perf_pmu__for_each_hybrid_pmu(pmu) { 213 rec_argv[i++] = "-e"; 214 s = perf_mem_events__name(j, pmu->name); 215 if (s) { 216 s = strdup(s); 217 if (!s) 218 return -1; 219 220 rec_argv[i++] = s; 221 rec_tmp[k++] = s; 222 } 223 } 224 } 225 } 226 227 *argv_nr = i; 228 *tmp_nr = k; 229 return 0; 230 } 231 232 static const char * const tlb_access[] = { 233 "N/A", 234 "HIT", 235 "MISS", 236 "L1", 237 "L2", 238 "Walker", 239 "Fault", 240 }; 241 242 int perf_mem__tlb_scnprintf(char *out, size_t sz, struct mem_info *mem_info) 243 { 244 size_t l = 0, i; 245 u64 m = PERF_MEM_TLB_NA; 246 u64 hit, miss; 247 248 sz -= 1; /* -1 for null termination */ 249 out[0] = '\0'; 250 251 if (mem_info) 252 m = mem_info->data_src.mem_dtlb; 253 254 hit = m & PERF_MEM_TLB_HIT; 255 miss = m & PERF_MEM_TLB_MISS; 256 257 /* already taken care of */ 258 m &= ~(PERF_MEM_TLB_HIT|PERF_MEM_TLB_MISS); 259 260 for (i = 0; m && i < ARRAY_SIZE(tlb_access); i++, m >>= 1) { 261 if (!(m & 0x1)) 262 continue; 263 if (l) { 264 strcat(out, " or "); 265 l += 4; 266 } 267 l += scnprintf(out + l, sz - l, tlb_access[i]); 268 } 269 if (*out == '\0') 270 l += scnprintf(out, sz - l, "N/A"); 271 if (hit) 272 l += scnprintf(out + l, sz - l, " hit"); 273 if (miss) 274 l += scnprintf(out + l, sz - l, " miss"); 275 276 return l; 277 } 278 279 static const char * const mem_lvl[] = { 280 "N/A", 281 "HIT", 282 "MISS", 283 "L1", 284 "LFB", 285 "L2", 286 "L3", 287 "Local RAM", 288 "Remote RAM (1 hop)", 289 "Remote RAM (2 hops)", 290 "Remote Cache (1 hop)", 291 "Remote Cache (2 hops)", 292 "I/O", 293 "Uncached", 294 }; 295 296 static const char * const mem_lvlnum[] = { 297 [PERF_MEM_LVLNUM_ANY_CACHE] = "Any cache", 298 [PERF_MEM_LVLNUM_LFB] = "LFB", 299 [PERF_MEM_LVLNUM_RAM] = "RAM", 300 [PERF_MEM_LVLNUM_PMEM] = "PMEM", 301 [PERF_MEM_LVLNUM_NA] = "N/A", 302 }; 303 304 static const char * const mem_hops[] = { 305 "N/A", 306 /* 307 * While printing, 'Remote' will be added to represent 308 * 'Remote core, same node' accesses as remote field need 309 * to be set with mem_hops field. 310 */ 311 "core, same node", 312 "node, same socket", 313 "socket, same board", 314 "board", 315 }; 316 317 int perf_mem__lvl_scnprintf(char *out, size_t sz, struct mem_info *mem_info) 318 { 319 size_t i, l = 0; 320 u64 m = PERF_MEM_LVL_NA; 321 u64 hit, miss; 322 int printed = 0; 323 324 if (mem_info) 325 m = mem_info->data_src.mem_lvl; 326 327 sz -= 1; /* -1 for null termination */ 328 out[0] = '\0'; 329 330 hit = m & PERF_MEM_LVL_HIT; 331 miss = m & PERF_MEM_LVL_MISS; 332 333 /* already taken care of */ 334 m &= ~(PERF_MEM_LVL_HIT|PERF_MEM_LVL_MISS); 335 336 if (mem_info && mem_info->data_src.mem_remote) { 337 strcat(out, "Remote "); 338 l += 7; 339 } 340 341 /* 342 * Incase mem_hops field is set, we can skip printing data source via 343 * PERF_MEM_LVL namespace. 344 */ 345 if (mem_info && mem_info->data_src.mem_hops) { 346 l += scnprintf(out + l, sz - l, "%s ", mem_hops[mem_info->data_src.mem_hops]); 347 } else { 348 for (i = 0; m && i < ARRAY_SIZE(mem_lvl); i++, m >>= 1) { 349 if (!(m & 0x1)) 350 continue; 351 if (printed++) { 352 strcat(out, " or "); 353 l += 4; 354 } 355 l += scnprintf(out + l, sz - l, mem_lvl[i]); 356 } 357 } 358 359 if (mem_info && mem_info->data_src.mem_lvl_num) { 360 int lvl = mem_info->data_src.mem_lvl_num; 361 if (printed++) { 362 strcat(out, " or "); 363 l += 4; 364 } 365 if (mem_lvlnum[lvl]) 366 l += scnprintf(out + l, sz - l, mem_lvlnum[lvl]); 367 else 368 l += scnprintf(out + l, sz - l, "L%d", lvl); 369 } 370 371 if (l == 0) 372 l += scnprintf(out + l, sz - l, "N/A"); 373 if (hit) 374 l += scnprintf(out + l, sz - l, " hit"); 375 if (miss) 376 l += scnprintf(out + l, sz - l, " miss"); 377 378 return l; 379 } 380 381 static const char * const snoop_access[] = { 382 "N/A", 383 "None", 384 "Hit", 385 "Miss", 386 "HitM", 387 }; 388 389 int perf_mem__snp_scnprintf(char *out, size_t sz, struct mem_info *mem_info) 390 { 391 size_t i, l = 0; 392 u64 m = PERF_MEM_SNOOP_NA; 393 394 sz -= 1; /* -1 for null termination */ 395 out[0] = '\0'; 396 397 if (mem_info) 398 m = mem_info->data_src.mem_snoop; 399 400 for (i = 0; m && i < ARRAY_SIZE(snoop_access); i++, m >>= 1) { 401 if (!(m & 0x1)) 402 continue; 403 if (l) { 404 strcat(out, " or "); 405 l += 4; 406 } 407 l += scnprintf(out + l, sz - l, snoop_access[i]); 408 } 409 if (mem_info && 410 (mem_info->data_src.mem_snoopx & PERF_MEM_SNOOPX_FWD)) { 411 if (l) { 412 strcat(out, " or "); 413 l += 4; 414 } 415 l += scnprintf(out + l, sz - l, "Fwd"); 416 } 417 418 if (*out == '\0') 419 l += scnprintf(out, sz - l, "N/A"); 420 421 return l; 422 } 423 424 int perf_mem__lck_scnprintf(char *out, size_t sz, struct mem_info *mem_info) 425 { 426 u64 mask = PERF_MEM_LOCK_NA; 427 int l; 428 429 if (mem_info) 430 mask = mem_info->data_src.mem_lock; 431 432 if (mask & PERF_MEM_LOCK_NA) 433 l = scnprintf(out, sz, "N/A"); 434 else if (mask & PERF_MEM_LOCK_LOCKED) 435 l = scnprintf(out, sz, "Yes"); 436 else 437 l = scnprintf(out, sz, "No"); 438 439 return l; 440 } 441 442 int perf_mem__blk_scnprintf(char *out, size_t sz, struct mem_info *mem_info) 443 { 444 size_t l = 0; 445 u64 mask = PERF_MEM_BLK_NA; 446 447 sz -= 1; /* -1 for null termination */ 448 out[0] = '\0'; 449 450 if (mem_info) 451 mask = mem_info->data_src.mem_blk; 452 453 if (!mask || (mask & PERF_MEM_BLK_NA)) { 454 l += scnprintf(out + l, sz - l, " N/A"); 455 return l; 456 } 457 if (mask & PERF_MEM_BLK_DATA) 458 l += scnprintf(out + l, sz - l, " Data"); 459 if (mask & PERF_MEM_BLK_ADDR) 460 l += scnprintf(out + l, sz - l, " Addr"); 461 462 return l; 463 } 464 465 int perf_script__meminfo_scnprintf(char *out, size_t sz, struct mem_info *mem_info) 466 { 467 int i = 0; 468 469 i += perf_mem__lvl_scnprintf(out, sz, mem_info); 470 i += scnprintf(out + i, sz - i, "|SNP "); 471 i += perf_mem__snp_scnprintf(out + i, sz - i, mem_info); 472 i += scnprintf(out + i, sz - i, "|TLB "); 473 i += perf_mem__tlb_scnprintf(out + i, sz - i, mem_info); 474 i += scnprintf(out + i, sz - i, "|LCK "); 475 i += perf_mem__lck_scnprintf(out + i, sz - i, mem_info); 476 i += scnprintf(out + i, sz - i, "|BLK "); 477 i += perf_mem__blk_scnprintf(out + i, sz - i, mem_info); 478 479 return i; 480 } 481 482 int c2c_decode_stats(struct c2c_stats *stats, struct mem_info *mi) 483 { 484 union perf_mem_data_src *data_src = &mi->data_src; 485 u64 daddr = mi->daddr.addr; 486 u64 op = data_src->mem_op; 487 u64 lvl = data_src->mem_lvl; 488 u64 snoop = data_src->mem_snoop; 489 u64 lock = data_src->mem_lock; 490 u64 blk = data_src->mem_blk; 491 /* 492 * Skylake might report unknown remote level via this 493 * bit, consider it when evaluating remote HITMs. 494 * 495 * Incase of power, remote field can also be used to denote cache 496 * accesses from the another core of same node. Hence, setting 497 * mrem only when HOPS is zero along with set remote field. 498 */ 499 bool mrem = (data_src->mem_remote && !data_src->mem_hops); 500 int err = 0; 501 502 #define HITM_INC(__f) \ 503 do { \ 504 stats->__f++; \ 505 stats->tot_hitm++; \ 506 } while (0) 507 508 #define P(a, b) PERF_MEM_##a##_##b 509 510 stats->nr_entries++; 511 512 if (lock & P(LOCK, LOCKED)) stats->locks++; 513 514 if (blk & P(BLK, DATA)) stats->blk_data++; 515 if (blk & P(BLK, ADDR)) stats->blk_addr++; 516 517 if (op & P(OP, LOAD)) { 518 /* load */ 519 stats->load++; 520 521 if (!daddr) { 522 stats->ld_noadrs++; 523 return -1; 524 } 525 526 if (lvl & P(LVL, HIT)) { 527 if (lvl & P(LVL, UNC)) stats->ld_uncache++; 528 if (lvl & P(LVL, IO)) stats->ld_io++; 529 if (lvl & P(LVL, LFB)) stats->ld_fbhit++; 530 if (lvl & P(LVL, L1 )) stats->ld_l1hit++; 531 if (lvl & P(LVL, L2 )) stats->ld_l2hit++; 532 if (lvl & P(LVL, L3 )) { 533 if (snoop & P(SNOOP, HITM)) 534 HITM_INC(lcl_hitm); 535 else 536 stats->ld_llchit++; 537 } 538 539 if (lvl & P(LVL, LOC_RAM)) { 540 stats->lcl_dram++; 541 if (snoop & P(SNOOP, HIT)) 542 stats->ld_shared++; 543 else 544 stats->ld_excl++; 545 } 546 547 if ((lvl & P(LVL, REM_RAM1)) || 548 (lvl & P(LVL, REM_RAM2)) || 549 mrem) { 550 stats->rmt_dram++; 551 if (snoop & P(SNOOP, HIT)) 552 stats->ld_shared++; 553 else 554 stats->ld_excl++; 555 } 556 } 557 558 if ((lvl & P(LVL, REM_CCE1)) || 559 (lvl & P(LVL, REM_CCE2)) || 560 mrem) { 561 if (snoop & P(SNOOP, HIT)) 562 stats->rmt_hit++; 563 else if (snoop & P(SNOOP, HITM)) 564 HITM_INC(rmt_hitm); 565 } 566 567 if ((lvl & P(LVL, MISS))) 568 stats->ld_miss++; 569 570 } else if (op & P(OP, STORE)) { 571 /* store */ 572 stats->store++; 573 574 if (!daddr) { 575 stats->st_noadrs++; 576 return -1; 577 } 578 579 if (lvl & P(LVL, HIT)) { 580 if (lvl & P(LVL, UNC)) stats->st_uncache++; 581 if (lvl & P(LVL, L1 )) stats->st_l1hit++; 582 } 583 if (lvl & P(LVL, MISS)) 584 if (lvl & P(LVL, L1)) stats->st_l1miss++; 585 } else { 586 /* unparsable data_src? */ 587 stats->noparse++; 588 return -1; 589 } 590 591 if (!mi->daddr.ms.map || !mi->iaddr.ms.map) { 592 stats->nomap++; 593 return -1; 594 } 595 596 #undef P 597 #undef HITM_INC 598 return err; 599 } 600 601 void c2c_add_stats(struct c2c_stats *stats, struct c2c_stats *add) 602 { 603 stats->nr_entries += add->nr_entries; 604 605 stats->locks += add->locks; 606 stats->store += add->store; 607 stats->st_uncache += add->st_uncache; 608 stats->st_noadrs += add->st_noadrs; 609 stats->st_l1hit += add->st_l1hit; 610 stats->st_l1miss += add->st_l1miss; 611 stats->load += add->load; 612 stats->ld_excl += add->ld_excl; 613 stats->ld_shared += add->ld_shared; 614 stats->ld_uncache += add->ld_uncache; 615 stats->ld_io += add->ld_io; 616 stats->ld_miss += add->ld_miss; 617 stats->ld_noadrs += add->ld_noadrs; 618 stats->ld_fbhit += add->ld_fbhit; 619 stats->ld_l1hit += add->ld_l1hit; 620 stats->ld_l2hit += add->ld_l2hit; 621 stats->ld_llchit += add->ld_llchit; 622 stats->lcl_hitm += add->lcl_hitm; 623 stats->rmt_hitm += add->rmt_hitm; 624 stats->tot_hitm += add->tot_hitm; 625 stats->rmt_hit += add->rmt_hit; 626 stats->lcl_dram += add->lcl_dram; 627 stats->rmt_dram += add->rmt_dram; 628 stats->blk_data += add->blk_data; 629 stats->blk_addr += add->blk_addr; 630 stats->nomap += add->nomap; 631 stats->noparse += add->noparse; 632 } 633