1 /* 2 * turbostat -- show CPU frequency and C-state residency 3 * on modern Intel turbo-capable processors. 4 * 5 * Copyright (c) 2012 Intel Corporation. 6 * Len Brown <len.brown@intel.com> 7 * 8 * This program is free software; you can redistribute it and/or modify it 9 * under the terms and conditions of the GNU General Public License, 10 * version 2, as published by the Free Software Foundation. 11 * 12 * This program is distributed in the hope it will be useful, but WITHOUT 13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 15 * more details. 16 * 17 * You should have received a copy of the GNU General Public License along with 18 * this program; if not, write to the Free Software Foundation, Inc., 19 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. 20 */ 21 22 #define _GNU_SOURCE 23 #include <stdio.h> 24 #include <unistd.h> 25 #include <sys/types.h> 26 #include <sys/wait.h> 27 #include <sys/stat.h> 28 #include <sys/resource.h> 29 #include <fcntl.h> 30 #include <signal.h> 31 #include <sys/time.h> 32 #include <stdlib.h> 33 #include <dirent.h> 34 #include <string.h> 35 #include <ctype.h> 36 #include <sched.h> 37 38 #define MSR_TSC 0x10 39 #define MSR_NEHALEM_PLATFORM_INFO 0xCE 40 #define MSR_NEHALEM_TURBO_RATIO_LIMIT 0x1AD 41 #define MSR_APERF 0xE8 42 #define MSR_MPERF 0xE7 43 #define MSR_PKG_C2_RESIDENCY 0x60D /* SNB only */ 44 #define MSR_PKG_C3_RESIDENCY 0x3F8 45 #define MSR_PKG_C6_RESIDENCY 0x3F9 46 #define MSR_PKG_C7_RESIDENCY 0x3FA /* SNB only */ 47 #define MSR_CORE_C3_RESIDENCY 0x3FC 48 #define MSR_CORE_C6_RESIDENCY 0x3FD 49 #define MSR_CORE_C7_RESIDENCY 0x3FE /* SNB only */ 50 51 char *proc_stat = "/proc/stat"; 52 unsigned int interval_sec = 5; /* set with -i interval_sec */ 53 unsigned int verbose; /* set with -v */ 54 unsigned int summary_only; /* set with -s */ 55 unsigned int skip_c0; 56 unsigned int skip_c1; 57 unsigned int do_nhm_cstates; 58 unsigned int do_snb_cstates; 59 unsigned int has_aperf; 60 unsigned int units = 1000000000; /* Ghz etc */ 61 unsigned int genuine_intel; 62 unsigned int has_invariant_tsc; 63 unsigned int do_nehalem_platform_info; 64 unsigned int do_nehalem_turbo_ratio_limit; 65 unsigned int extra_msr_offset; 66 double bclk; 67 unsigned int show_pkg; 68 unsigned int show_core; 69 unsigned int show_cpu; 70 71 int aperf_mperf_unstable; 72 int backwards_count; 73 char *progname; 74 75 int num_cpus; 76 cpu_set_t *cpu_present_set, *cpu_mask; 77 size_t cpu_present_setsize, cpu_mask_size; 78 79 struct counters { 80 unsigned long long tsc; /* per thread */ 81 unsigned long long aperf; /* per thread */ 82 unsigned long long mperf; /* per thread */ 83 unsigned long long c1; /* per thread (calculated) */ 84 unsigned long long c3; /* per core */ 85 unsigned long long c6; /* per core */ 86 unsigned long long c7; /* per core */ 87 unsigned long long pc2; /* per package */ 88 unsigned long long pc3; /* per package */ 89 unsigned long long pc6; /* per package */ 90 unsigned long long pc7; /* per package */ 91 unsigned long long extra_msr; /* per thread */ 92 int pkg; 93 int core; 94 int cpu; 95 struct counters *next; 96 }; 97 98 struct counters *cnt_even; 99 struct counters *cnt_odd; 100 struct counters *cnt_delta; 101 struct counters *cnt_average; 102 struct timeval tv_even; 103 struct timeval tv_odd; 104 struct timeval tv_delta; 105 106 int mark_cpu_present(int pkg, int core, int cpu) 107 { 108 CPU_SET_S(cpu, cpu_present_setsize, cpu_present_set); 109 return 0; 110 } 111 112 /* 113 * cpu_mask_init(ncpus) 114 * 115 * allocate and clear cpu_mask 116 * set cpu_mask_size 117 */ 118 void cpu_mask_init(int ncpus) 119 { 120 cpu_mask = CPU_ALLOC(ncpus); 121 if (cpu_mask == NULL) { 122 perror("CPU_ALLOC"); 123 exit(3); 124 } 125 cpu_mask_size = CPU_ALLOC_SIZE(ncpus); 126 CPU_ZERO_S(cpu_mask_size, cpu_mask); 127 128 /* 129 * Allocate and initialize cpu_present_set 130 */ 131 cpu_present_set = CPU_ALLOC(ncpus); 132 if (cpu_present_set == NULL) { 133 perror("CPU_ALLOC"); 134 exit(3); 135 } 136 cpu_present_setsize = CPU_ALLOC_SIZE(ncpus); 137 CPU_ZERO_S(cpu_present_setsize, cpu_present_set); 138 for_all_cpus(mark_cpu_present); 139 } 140 141 void cpu_mask_uninit() 142 { 143 CPU_FREE(cpu_mask); 144 cpu_mask = NULL; 145 cpu_mask_size = 0; 146 CPU_FREE(cpu_present_set); 147 cpu_present_set = NULL; 148 cpu_present_setsize = 0; 149 } 150 151 int cpu_migrate(int cpu) 152 { 153 CPU_ZERO_S(cpu_mask_size, cpu_mask); 154 CPU_SET_S(cpu, cpu_mask_size, cpu_mask); 155 if (sched_setaffinity(0, cpu_mask_size, cpu_mask) == -1) 156 return -1; 157 else 158 return 0; 159 } 160 161 int get_msr(int cpu, off_t offset, unsigned long long *msr) 162 { 163 ssize_t retval; 164 char pathname[32]; 165 int fd; 166 167 sprintf(pathname, "/dev/cpu/%d/msr", cpu); 168 fd = open(pathname, O_RDONLY); 169 if (fd < 0) 170 return -1; 171 172 retval = pread(fd, msr, sizeof *msr, offset); 173 close(fd); 174 175 if (retval != sizeof *msr) 176 return -1; 177 178 return 0; 179 } 180 181 void print_header(void) 182 { 183 if (show_pkg) 184 fprintf(stderr, "pk"); 185 if (show_pkg) 186 fprintf(stderr, " "); 187 if (show_core) 188 fprintf(stderr, "cor"); 189 if (show_cpu) 190 fprintf(stderr, " CPU"); 191 if (show_pkg || show_core || show_cpu) 192 fprintf(stderr, " "); 193 if (do_nhm_cstates) 194 fprintf(stderr, " %%c0"); 195 if (has_aperf) 196 fprintf(stderr, " GHz"); 197 fprintf(stderr, " TSC"); 198 if (do_nhm_cstates) 199 fprintf(stderr, " %%c1"); 200 if (do_nhm_cstates) 201 fprintf(stderr, " %%c3"); 202 if (do_nhm_cstates) 203 fprintf(stderr, " %%c6"); 204 if (do_snb_cstates) 205 fprintf(stderr, " %%c7"); 206 if (do_snb_cstates) 207 fprintf(stderr, " %%pc2"); 208 if (do_nhm_cstates) 209 fprintf(stderr, " %%pc3"); 210 if (do_nhm_cstates) 211 fprintf(stderr, " %%pc6"); 212 if (do_snb_cstates) 213 fprintf(stderr, " %%pc7"); 214 if (extra_msr_offset) 215 fprintf(stderr, " MSR 0x%x ", extra_msr_offset); 216 217 putc('\n', stderr); 218 } 219 220 void dump_cnt(struct counters *cnt) 221 { 222 if (!cnt) 223 return; 224 if (cnt->pkg) fprintf(stderr, "package: %d ", cnt->pkg); 225 if (cnt->core) fprintf(stderr, "core:: %d ", cnt->core); 226 if (cnt->cpu) fprintf(stderr, "CPU: %d ", cnt->cpu); 227 if (cnt->tsc) fprintf(stderr, "TSC: %016llX\n", cnt->tsc); 228 if (cnt->c3) fprintf(stderr, "c3: %016llX\n", cnt->c3); 229 if (cnt->c6) fprintf(stderr, "c6: %016llX\n", cnt->c6); 230 if (cnt->c7) fprintf(stderr, "c7: %016llX\n", cnt->c7); 231 if (cnt->aperf) fprintf(stderr, "aperf: %016llX\n", cnt->aperf); 232 if (cnt->pc2) fprintf(stderr, "pc2: %016llX\n", cnt->pc2); 233 if (cnt->pc3) fprintf(stderr, "pc3: %016llX\n", cnt->pc3); 234 if (cnt->pc6) fprintf(stderr, "pc6: %016llX\n", cnt->pc6); 235 if (cnt->pc7) fprintf(stderr, "pc7: %016llX\n", cnt->pc7); 236 if (cnt->extra_msr) fprintf(stderr, "msr0x%x: %016llX\n", extra_msr_offset, cnt->extra_msr); 237 } 238 239 void dump_list(struct counters *cnt) 240 { 241 printf("dump_list 0x%p\n", cnt); 242 243 for (; cnt; cnt = cnt->next) 244 dump_cnt(cnt); 245 } 246 247 /* 248 * column formatting convention & formats 249 * package: "pk" 2 columns %2d 250 * core: "cor" 3 columns %3d 251 * CPU: "CPU" 3 columns %3d 252 * GHz: "GHz" 3 columns %3.2 253 * TSC: "TSC" 3 columns %3.2 254 * percentage " %pc3" %6.2 255 */ 256 void print_cnt(struct counters *p) 257 { 258 double interval_float; 259 260 interval_float = tv_delta.tv_sec + tv_delta.tv_usec/1000000.0; 261 262 /* topology columns, print blanks on 1st (average) line */ 263 if (p == cnt_average) { 264 if (show_pkg) 265 fprintf(stderr, " "); 266 if (show_pkg && show_core) 267 fprintf(stderr, " "); 268 if (show_core) 269 fprintf(stderr, " "); 270 if (show_cpu) 271 fprintf(stderr, " " " "); 272 } else { 273 if (show_pkg) 274 fprintf(stderr, "%2d", p->pkg); 275 if (show_pkg && show_core) 276 fprintf(stderr, " "); 277 if (show_core) 278 fprintf(stderr, "%3d", p->core); 279 if (show_cpu) 280 fprintf(stderr, " %3d", p->cpu); 281 } 282 283 /* %c0 */ 284 if (do_nhm_cstates) { 285 if (show_pkg || show_core || show_cpu) 286 fprintf(stderr, " "); 287 if (!skip_c0) 288 fprintf(stderr, "%6.2f", 100.0 * p->mperf/p->tsc); 289 else 290 fprintf(stderr, " ****"); 291 } 292 293 /* GHz */ 294 if (has_aperf) { 295 if (!aperf_mperf_unstable) { 296 fprintf(stderr, " %3.2f", 297 1.0 * p->tsc / units * p->aperf / 298 p->mperf / interval_float); 299 } else { 300 if (p->aperf > p->tsc || p->mperf > p->tsc) { 301 fprintf(stderr, " ***"); 302 } else { 303 fprintf(stderr, "%3.1f*", 304 1.0 * p->tsc / 305 units * p->aperf / 306 p->mperf / interval_float); 307 } 308 } 309 } 310 311 /* TSC */ 312 fprintf(stderr, "%5.2f", 1.0 * p->tsc/units/interval_float); 313 314 if (do_nhm_cstates) { 315 if (!skip_c1) 316 fprintf(stderr, " %6.2f", 100.0 * p->c1/p->tsc); 317 else 318 fprintf(stderr, " ****"); 319 } 320 if (do_nhm_cstates) 321 fprintf(stderr, " %6.2f", 100.0 * p->c3/p->tsc); 322 if (do_nhm_cstates) 323 fprintf(stderr, " %6.2f", 100.0 * p->c6/p->tsc); 324 if (do_snb_cstates) 325 fprintf(stderr, " %6.2f", 100.0 * p->c7/p->tsc); 326 if (do_snb_cstates) 327 fprintf(stderr, " %6.2f", 100.0 * p->pc2/p->tsc); 328 if (do_nhm_cstates) 329 fprintf(stderr, " %6.2f", 100.0 * p->pc3/p->tsc); 330 if (do_nhm_cstates) 331 fprintf(stderr, " %6.2f", 100.0 * p->pc6/p->tsc); 332 if (do_snb_cstates) 333 fprintf(stderr, " %6.2f", 100.0 * p->pc7/p->tsc); 334 if (extra_msr_offset) 335 fprintf(stderr, " 0x%016llx", p->extra_msr); 336 putc('\n', stderr); 337 } 338 339 void print_counters(struct counters *counters) 340 { 341 struct counters *cnt; 342 static int printed; 343 344 345 if (!printed || !summary_only) 346 print_header(); 347 348 if (num_cpus > 1) 349 print_cnt(cnt_average); 350 351 printed = 1; 352 353 if (summary_only) 354 return; 355 356 for (cnt = counters; cnt != NULL; cnt = cnt->next) 357 print_cnt(cnt); 358 359 } 360 361 #define SUBTRACT_COUNTER(after, before, delta) (delta = (after - before), (before > after)) 362 363 int compute_delta(struct counters *after, 364 struct counters *before, struct counters *delta) 365 { 366 int errors = 0; 367 int perf_err = 0; 368 369 skip_c0 = skip_c1 = 0; 370 371 for ( ; after && before && delta; 372 after = after->next, before = before->next, delta = delta->next) { 373 if (before->cpu != after->cpu) { 374 printf("cpu configuration changed: %d != %d\n", 375 before->cpu, after->cpu); 376 return -1; 377 } 378 379 if (SUBTRACT_COUNTER(after->tsc, before->tsc, delta->tsc)) { 380 fprintf(stderr, "cpu%d TSC went backwards %llX to %llX\n", 381 before->cpu, before->tsc, after->tsc); 382 errors++; 383 } 384 /* check for TSC < 1 Mcycles over interval */ 385 if (delta->tsc < (1000 * 1000)) { 386 fprintf(stderr, "Insanely slow TSC rate," 387 " TSC stops in idle?\n"); 388 fprintf(stderr, "You can disable all c-states" 389 " by booting with \"idle=poll\"\n"); 390 fprintf(stderr, "or just the deep ones with" 391 " \"processor.max_cstate=1\"\n"); 392 exit(-3); 393 } 394 if (SUBTRACT_COUNTER(after->c3, before->c3, delta->c3)) { 395 fprintf(stderr, "cpu%d c3 counter went backwards %llX to %llX\n", 396 before->cpu, before->c3, after->c3); 397 errors++; 398 } 399 if (SUBTRACT_COUNTER(after->c6, before->c6, delta->c6)) { 400 fprintf(stderr, "cpu%d c6 counter went backwards %llX to %llX\n", 401 before->cpu, before->c6, after->c6); 402 errors++; 403 } 404 if (SUBTRACT_COUNTER(after->c7, before->c7, delta->c7)) { 405 fprintf(stderr, "cpu%d c7 counter went backwards %llX to %llX\n", 406 before->cpu, before->c7, after->c7); 407 errors++; 408 } 409 if (SUBTRACT_COUNTER(after->pc2, before->pc2, delta->pc2)) { 410 fprintf(stderr, "cpu%d pc2 counter went backwards %llX to %llX\n", 411 before->cpu, before->pc2, after->pc2); 412 errors++; 413 } 414 if (SUBTRACT_COUNTER(after->pc3, before->pc3, delta->pc3)) { 415 fprintf(stderr, "cpu%d pc3 counter went backwards %llX to %llX\n", 416 before->cpu, before->pc3, after->pc3); 417 errors++; 418 } 419 if (SUBTRACT_COUNTER(after->pc6, before->pc6, delta->pc6)) { 420 fprintf(stderr, "cpu%d pc6 counter went backwards %llX to %llX\n", 421 before->cpu, before->pc6, after->pc6); 422 errors++; 423 } 424 if (SUBTRACT_COUNTER(after->pc7, before->pc7, delta->pc7)) { 425 fprintf(stderr, "cpu%d pc7 counter went backwards %llX to %llX\n", 426 before->cpu, before->pc7, after->pc7); 427 errors++; 428 } 429 430 perf_err = SUBTRACT_COUNTER(after->aperf, before->aperf, delta->aperf); 431 if (perf_err) { 432 fprintf(stderr, "cpu%d aperf counter went backwards %llX to %llX\n", 433 before->cpu, before->aperf, after->aperf); 434 } 435 perf_err |= SUBTRACT_COUNTER(after->mperf, before->mperf, delta->mperf); 436 if (perf_err) { 437 fprintf(stderr, "cpu%d mperf counter went backwards %llX to %llX\n", 438 before->cpu, before->mperf, after->mperf); 439 } 440 if (perf_err) { 441 if (!aperf_mperf_unstable) { 442 fprintf(stderr, "%s: APERF or MPERF went backwards *\n", progname); 443 fprintf(stderr, "* Frequency results do not cover entire interval *\n"); 444 fprintf(stderr, "* fix this by running Linux-2.6.30 or later *\n"); 445 446 aperf_mperf_unstable = 1; 447 } 448 /* 449 * mperf delta is likely a huge "positive" number 450 * can not use it for calculating c0 time 451 */ 452 skip_c0 = 1; 453 skip_c1 = 1; 454 } 455 456 /* 457 * As mperf and tsc collection are not atomic, 458 * it is possible for mperf's non-halted cycles 459 * to exceed TSC's all cycles: show c1 = 0% in that case. 460 */ 461 if (delta->mperf > delta->tsc) 462 delta->c1 = 0; 463 else /* normal case, derive c1 */ 464 delta->c1 = delta->tsc - delta->mperf 465 - delta->c3 - delta->c6 - delta->c7; 466 467 if (delta->mperf == 0) 468 delta->mperf = 1; /* divide by 0 protection */ 469 470 /* 471 * for "extra msr", just copy the latest w/o subtracting 472 */ 473 delta->extra_msr = after->extra_msr; 474 if (errors) { 475 fprintf(stderr, "ERROR cpu%d before:\n", before->cpu); 476 dump_cnt(before); 477 fprintf(stderr, "ERROR cpu%d after:\n", before->cpu); 478 dump_cnt(after); 479 errors = 0; 480 } 481 } 482 return 0; 483 } 484 485 void compute_average(struct counters *delta, struct counters *avg) 486 { 487 struct counters *sum; 488 489 sum = calloc(1, sizeof(struct counters)); 490 if (sum == NULL) { 491 perror("calloc sum"); 492 exit(1); 493 } 494 495 for (; delta; delta = delta->next) { 496 sum->tsc += delta->tsc; 497 sum->c1 += delta->c1; 498 sum->c3 += delta->c3; 499 sum->c6 += delta->c6; 500 sum->c7 += delta->c7; 501 sum->aperf += delta->aperf; 502 sum->mperf += delta->mperf; 503 sum->pc2 += delta->pc2; 504 sum->pc3 += delta->pc3; 505 sum->pc6 += delta->pc6; 506 sum->pc7 += delta->pc7; 507 } 508 avg->tsc = sum->tsc/num_cpus; 509 avg->c1 = sum->c1/num_cpus; 510 avg->c3 = sum->c3/num_cpus; 511 avg->c6 = sum->c6/num_cpus; 512 avg->c7 = sum->c7/num_cpus; 513 avg->aperf = sum->aperf/num_cpus; 514 avg->mperf = sum->mperf/num_cpus; 515 avg->pc2 = sum->pc2/num_cpus; 516 avg->pc3 = sum->pc3/num_cpus; 517 avg->pc6 = sum->pc6/num_cpus; 518 avg->pc7 = sum->pc7/num_cpus; 519 520 free(sum); 521 } 522 523 int get_counters(struct counters *cnt) 524 { 525 for ( ; cnt; cnt = cnt->next) { 526 527 if (cpu_migrate(cnt->cpu)) 528 return -1; 529 530 if (get_msr(cnt->cpu, MSR_TSC, &cnt->tsc)) 531 return -1; 532 533 if (has_aperf) { 534 if (get_msr(cnt->cpu, MSR_APERF, &cnt->aperf)) 535 return -1; 536 if (get_msr(cnt->cpu, MSR_MPERF, &cnt->mperf)) 537 return -1; 538 } 539 540 if (do_nhm_cstates) { 541 if (get_msr(cnt->cpu, MSR_CORE_C3_RESIDENCY, &cnt->c3)) 542 return -1; 543 if (get_msr(cnt->cpu, MSR_CORE_C6_RESIDENCY, &cnt->c6)) 544 return -1; 545 } 546 547 if (do_snb_cstates) 548 if (get_msr(cnt->cpu, MSR_CORE_C7_RESIDENCY, &cnt->c7)) 549 return -1; 550 551 if (do_nhm_cstates) { 552 if (get_msr(cnt->cpu, MSR_PKG_C3_RESIDENCY, &cnt->pc3)) 553 return -1; 554 if (get_msr(cnt->cpu, MSR_PKG_C6_RESIDENCY, &cnt->pc6)) 555 return -1; 556 } 557 if (do_snb_cstates) { 558 if (get_msr(cnt->cpu, MSR_PKG_C2_RESIDENCY, &cnt->pc2)) 559 return -1; 560 if (get_msr(cnt->cpu, MSR_PKG_C7_RESIDENCY, &cnt->pc7)) 561 return -1; 562 } 563 if (extra_msr_offset) 564 if (get_msr(cnt->cpu, extra_msr_offset, &cnt->extra_msr)) 565 return -1; 566 } 567 return 0; 568 } 569 570 void print_nehalem_info(void) 571 { 572 unsigned long long msr; 573 unsigned int ratio; 574 575 if (!do_nehalem_platform_info) 576 return; 577 578 get_msr(0, MSR_NEHALEM_PLATFORM_INFO, &msr); 579 580 ratio = (msr >> 40) & 0xFF; 581 fprintf(stderr, "%d * %.0f = %.0f MHz max efficiency\n", 582 ratio, bclk, ratio * bclk); 583 584 ratio = (msr >> 8) & 0xFF; 585 fprintf(stderr, "%d * %.0f = %.0f MHz TSC frequency\n", 586 ratio, bclk, ratio * bclk); 587 588 if (verbose > 1) 589 fprintf(stderr, "MSR_NEHALEM_PLATFORM_INFO: 0x%llx\n", msr); 590 591 if (!do_nehalem_turbo_ratio_limit) 592 return; 593 594 get_msr(0, MSR_NEHALEM_TURBO_RATIO_LIMIT, &msr); 595 596 ratio = (msr >> 24) & 0xFF; 597 if (ratio) 598 fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 4 active cores\n", 599 ratio, bclk, ratio * bclk); 600 601 ratio = (msr >> 16) & 0xFF; 602 if (ratio) 603 fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 3 active cores\n", 604 ratio, bclk, ratio * bclk); 605 606 ratio = (msr >> 8) & 0xFF; 607 if (ratio) 608 fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 2 active cores\n", 609 ratio, bclk, ratio * bclk); 610 611 ratio = (msr >> 0) & 0xFF; 612 if (ratio) 613 fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 1 active cores\n", 614 ratio, bclk, ratio * bclk); 615 616 } 617 618 void free_counter_list(struct counters *list) 619 { 620 struct counters *p; 621 622 for (p = list; p; ) { 623 struct counters *free_me; 624 625 free_me = p; 626 p = p->next; 627 free(free_me); 628 } 629 } 630 631 void free_all_counters(void) 632 { 633 free_counter_list(cnt_even); 634 cnt_even = NULL; 635 636 free_counter_list(cnt_odd); 637 cnt_odd = NULL; 638 639 free_counter_list(cnt_delta); 640 cnt_delta = NULL; 641 642 free_counter_list(cnt_average); 643 cnt_average = NULL; 644 } 645 646 void insert_counters(struct counters **list, 647 struct counters *new) 648 { 649 struct counters *prev; 650 651 /* 652 * list was empty 653 */ 654 if (*list == NULL) { 655 new->next = *list; 656 *list = new; 657 return; 658 } 659 660 if (!summary_only) 661 show_cpu = 1; /* there is more than one CPU */ 662 663 /* 664 * insert on front of list. 665 * It is sorted by ascending package#, core#, cpu# 666 */ 667 if (((*list)->pkg > new->pkg) || 668 (((*list)->pkg == new->pkg) && ((*list)->core > new->core)) || 669 (((*list)->pkg == new->pkg) && ((*list)->core == new->core) && ((*list)->cpu > new->cpu))) { 670 new->next = *list; 671 *list = new; 672 return; 673 } 674 675 prev = *list; 676 677 while (prev->next && (prev->next->pkg < new->pkg)) { 678 prev = prev->next; 679 if (!summary_only) 680 show_pkg = 1; /* there is more than 1 package */ 681 } 682 683 while (prev->next && (prev->next->pkg == new->pkg) 684 && (prev->next->core < new->core)) { 685 prev = prev->next; 686 if (!summary_only) 687 show_core = 1; /* there is more than 1 core */ 688 } 689 690 while (prev->next && (prev->next->pkg == new->pkg) 691 && (prev->next->core == new->core) 692 && (prev->next->cpu < new->cpu)) { 693 prev = prev->next; 694 } 695 696 /* 697 * insert after "prev" 698 */ 699 new->next = prev->next; 700 prev->next = new; 701 } 702 703 void alloc_new_counters(int pkg, int core, int cpu) 704 { 705 struct counters *new; 706 707 if (verbose > 1) 708 printf("pkg%d core%d, cpu%d\n", pkg, core, cpu); 709 710 new = (struct counters *)calloc(1, sizeof(struct counters)); 711 if (new == NULL) { 712 perror("calloc"); 713 exit(1); 714 } 715 new->pkg = pkg; 716 new->core = core; 717 new->cpu = cpu; 718 insert_counters(&cnt_odd, new); 719 720 new = (struct counters *)calloc(1, 721 sizeof(struct counters)); 722 if (new == NULL) { 723 perror("calloc"); 724 exit(1); 725 } 726 new->pkg = pkg; 727 new->core = core; 728 new->cpu = cpu; 729 insert_counters(&cnt_even, new); 730 731 new = (struct counters *)calloc(1, sizeof(struct counters)); 732 if (new == NULL) { 733 perror("calloc"); 734 exit(1); 735 } 736 new->pkg = pkg; 737 new->core = core; 738 new->cpu = cpu; 739 insert_counters(&cnt_delta, new); 740 741 new = (struct counters *)calloc(1, sizeof(struct counters)); 742 if (new == NULL) { 743 perror("calloc"); 744 exit(1); 745 } 746 new->pkg = pkg; 747 new->core = core; 748 new->cpu = cpu; 749 cnt_average = new; 750 } 751 752 int get_physical_package_id(int cpu) 753 { 754 char path[64]; 755 FILE *filep; 756 int pkg; 757 758 sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/physical_package_id", cpu); 759 filep = fopen(path, "r"); 760 if (filep == NULL) { 761 perror(path); 762 exit(1); 763 } 764 fscanf(filep, "%d", &pkg); 765 fclose(filep); 766 return pkg; 767 } 768 769 int get_core_id(int cpu) 770 { 771 char path[64]; 772 FILE *filep; 773 int core; 774 775 sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/core_id", cpu); 776 filep = fopen(path, "r"); 777 if (filep == NULL) { 778 perror(path); 779 exit(1); 780 } 781 fscanf(filep, "%d", &core); 782 fclose(filep); 783 return core; 784 } 785 786 /* 787 * run func(pkg, core, cpu) on every cpu in /proc/stat 788 */ 789 790 int for_all_cpus(void (func)(int, int, int)) 791 { 792 FILE *fp; 793 int cpu_count; 794 int retval; 795 796 fp = fopen(proc_stat, "r"); 797 if (fp == NULL) { 798 perror(proc_stat); 799 exit(1); 800 } 801 802 retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n"); 803 if (retval != 0) { 804 perror("/proc/stat format"); 805 exit(1); 806 } 807 808 for (cpu_count = 0; ; cpu_count++) { 809 int cpu; 810 811 retval = fscanf(fp, "cpu%u %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n", &cpu); 812 if (retval != 1) 813 break; 814 815 func(get_physical_package_id(cpu), get_core_id(cpu), cpu); 816 } 817 fclose(fp); 818 return cpu_count; 819 } 820 821 void re_initialize(void) 822 { 823 free_all_counters(); 824 num_cpus = for_all_cpus(alloc_new_counters); 825 cpu_mask_uninit(); 826 cpu_mask_init(num_cpus); 827 printf("turbostat: re-initialized with num_cpus %d\n", num_cpus); 828 } 829 830 void dummy(int pkg, int core, int cpu) { return; } 831 /* 832 * check to see if a cpu came on-line 833 */ 834 int verify_num_cpus(void) 835 { 836 int new_num_cpus; 837 838 new_num_cpus = for_all_cpus(dummy); 839 840 if (new_num_cpus != num_cpus) { 841 if (verbose) 842 printf("num_cpus was %d, is now %d\n", 843 num_cpus, new_num_cpus); 844 return -1; 845 } 846 return 0; 847 } 848 849 void turbostat_loop() 850 { 851 restart: 852 get_counters(cnt_even); 853 gettimeofday(&tv_even, (struct timezone *)NULL); 854 855 while (1) { 856 if (verify_num_cpus()) { 857 re_initialize(); 858 goto restart; 859 } 860 sleep(interval_sec); 861 if (get_counters(cnt_odd)) { 862 re_initialize(); 863 goto restart; 864 } 865 gettimeofday(&tv_odd, (struct timezone *)NULL); 866 compute_delta(cnt_odd, cnt_even, cnt_delta); 867 timersub(&tv_odd, &tv_even, &tv_delta); 868 compute_average(cnt_delta, cnt_average); 869 print_counters(cnt_delta); 870 sleep(interval_sec); 871 if (get_counters(cnt_even)) { 872 re_initialize(); 873 goto restart; 874 } 875 gettimeofday(&tv_even, (struct timezone *)NULL); 876 compute_delta(cnt_even, cnt_odd, cnt_delta); 877 timersub(&tv_even, &tv_odd, &tv_delta); 878 compute_average(cnt_delta, cnt_average); 879 print_counters(cnt_delta); 880 } 881 } 882 883 void check_dev_msr() 884 { 885 struct stat sb; 886 887 if (stat("/dev/cpu/0/msr", &sb)) { 888 fprintf(stderr, "no /dev/cpu/0/msr\n"); 889 fprintf(stderr, "Try \"# modprobe msr\"\n"); 890 exit(-5); 891 } 892 } 893 894 void check_super_user() 895 { 896 if (getuid() != 0) { 897 fprintf(stderr, "must be root\n"); 898 exit(-6); 899 } 900 } 901 902 int has_nehalem_turbo_ratio_limit(unsigned int family, unsigned int model) 903 { 904 if (!genuine_intel) 905 return 0; 906 907 if (family != 6) 908 return 0; 909 910 switch (model) { 911 case 0x1A: /* Core i7, Xeon 5500 series - Bloomfield, Gainstown NHM-EP */ 912 case 0x1E: /* Core i7 and i5 Processor - Clarksfield, Lynnfield, Jasper Forest */ 913 case 0x1F: /* Core i7 and i5 Processor - Nehalem */ 914 case 0x25: /* Westmere Client - Clarkdale, Arrandale */ 915 case 0x2C: /* Westmere EP - Gulftown */ 916 case 0x2A: /* SNB */ 917 case 0x2D: /* SNB Xeon */ 918 case 0x3A: /* IVB */ 919 case 0x3D: /* IVB Xeon */ 920 return 1; 921 case 0x2E: /* Nehalem-EX Xeon - Beckton */ 922 case 0x2F: /* Westmere-EX Xeon - Eagleton */ 923 default: 924 return 0; 925 } 926 } 927 928 int is_snb(unsigned int family, unsigned int model) 929 { 930 if (!genuine_intel) 931 return 0; 932 933 switch (model) { 934 case 0x2A: 935 case 0x2D: 936 case 0x3A: /* IVB */ 937 case 0x3D: /* IVB Xeon */ 938 return 1; 939 } 940 return 0; 941 } 942 943 double discover_bclk(unsigned int family, unsigned int model) 944 { 945 if (is_snb(family, model)) 946 return 100.00; 947 else 948 return 133.33; 949 } 950 951 void check_cpuid() 952 { 953 unsigned int eax, ebx, ecx, edx, max_level; 954 unsigned int fms, family, model, stepping; 955 956 eax = ebx = ecx = edx = 0; 957 958 asm("cpuid" : "=a" (max_level), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0)); 959 960 if (ebx == 0x756e6547 && edx == 0x49656e69 && ecx == 0x6c65746e) 961 genuine_intel = 1; 962 963 if (verbose) 964 fprintf(stderr, "%.4s%.4s%.4s ", 965 (char *)&ebx, (char *)&edx, (char *)&ecx); 966 967 asm("cpuid" : "=a" (fms), "=c" (ecx), "=d" (edx) : "a" (1) : "ebx"); 968 family = (fms >> 8) & 0xf; 969 model = (fms >> 4) & 0xf; 970 stepping = fms & 0xf; 971 if (family == 6 || family == 0xf) 972 model += ((fms >> 16) & 0xf) << 4; 973 974 if (verbose) 975 fprintf(stderr, "%d CPUID levels; family:model:stepping 0x%x:%x:%x (%d:%d:%d)\n", 976 max_level, family, model, stepping, family, model, stepping); 977 978 if (!(edx & (1 << 5))) { 979 fprintf(stderr, "CPUID: no MSR\n"); 980 exit(1); 981 } 982 983 /* 984 * check max extended function levels of CPUID. 985 * This is needed to check for invariant TSC. 986 * This check is valid for both Intel and AMD. 987 */ 988 ebx = ecx = edx = 0; 989 asm("cpuid" : "=a" (max_level), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0x80000000)); 990 991 if (max_level < 0x80000007) { 992 fprintf(stderr, "CPUID: no invariant TSC (max_level 0x%x)\n", max_level); 993 exit(1); 994 } 995 996 /* 997 * Non-Stop TSC is advertised by CPUID.EAX=0x80000007: EDX.bit8 998 * this check is valid for both Intel and AMD 999 */ 1000 asm("cpuid" : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0x80000007)); 1001 has_invariant_tsc = edx & (1 << 8); 1002 1003 if (!has_invariant_tsc) { 1004 fprintf(stderr, "No invariant TSC\n"); 1005 exit(1); 1006 } 1007 1008 /* 1009 * APERF/MPERF is advertised by CPUID.EAX=0x6: ECX.bit0 1010 * this check is valid for both Intel and AMD 1011 */ 1012 1013 asm("cpuid" : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0x6)); 1014 has_aperf = ecx & (1 << 0); 1015 if (!has_aperf) { 1016 fprintf(stderr, "No APERF MSR\n"); 1017 exit(1); 1018 } 1019 1020 do_nehalem_platform_info = genuine_intel && has_invariant_tsc; 1021 do_nhm_cstates = genuine_intel; /* all Intel w/ non-stop TSC have NHM counters */ 1022 do_snb_cstates = is_snb(family, model); 1023 bclk = discover_bclk(family, model); 1024 1025 do_nehalem_turbo_ratio_limit = has_nehalem_turbo_ratio_limit(family, model); 1026 } 1027 1028 1029 void usage() 1030 { 1031 fprintf(stderr, "%s: [-v] [-M MSR#] [-i interval_sec | command ...]\n", 1032 progname); 1033 exit(1); 1034 } 1035 1036 1037 /* 1038 * in /dev/cpu/ return success for names that are numbers 1039 * ie. filter out ".", "..", "microcode". 1040 */ 1041 int dir_filter(const struct dirent *dirp) 1042 { 1043 if (isdigit(dirp->d_name[0])) 1044 return 1; 1045 else 1046 return 0; 1047 } 1048 1049 int open_dev_cpu_msr(int dummy1) 1050 { 1051 return 0; 1052 } 1053 1054 void turbostat_init() 1055 { 1056 check_cpuid(); 1057 1058 check_dev_msr(); 1059 check_super_user(); 1060 1061 num_cpus = for_all_cpus(alloc_new_counters); 1062 cpu_mask_init(num_cpus); 1063 1064 if (verbose) 1065 print_nehalem_info(); 1066 } 1067 1068 int fork_it(char **argv) 1069 { 1070 int retval; 1071 pid_t child_pid; 1072 get_counters(cnt_even); 1073 1074 /* clear affinity side-effect of get_counters() */ 1075 sched_setaffinity(0, cpu_present_setsize, cpu_present_set); 1076 gettimeofday(&tv_even, (struct timezone *)NULL); 1077 1078 child_pid = fork(); 1079 if (!child_pid) { 1080 /* child */ 1081 execvp(argv[0], argv); 1082 } else { 1083 int status; 1084 1085 /* parent */ 1086 if (child_pid == -1) { 1087 perror("fork"); 1088 exit(1); 1089 } 1090 1091 signal(SIGINT, SIG_IGN); 1092 signal(SIGQUIT, SIG_IGN); 1093 if (waitpid(child_pid, &status, 0) == -1) { 1094 perror("wait"); 1095 exit(1); 1096 } 1097 } 1098 get_counters(cnt_odd); 1099 gettimeofday(&tv_odd, (struct timezone *)NULL); 1100 retval = compute_delta(cnt_odd, cnt_even, cnt_delta); 1101 1102 timersub(&tv_odd, &tv_even, &tv_delta); 1103 compute_average(cnt_delta, cnt_average); 1104 if (!retval) 1105 print_counters(cnt_delta); 1106 1107 fprintf(stderr, "%.6f sec\n", tv_delta.tv_sec + tv_delta.tv_usec/1000000.0); 1108 1109 return 0; 1110 } 1111 1112 void cmdline(int argc, char **argv) 1113 { 1114 int opt; 1115 1116 progname = argv[0]; 1117 1118 while ((opt = getopt(argc, argv, "+svi:M:")) != -1) { 1119 switch (opt) { 1120 case 's': 1121 summary_only++; 1122 break; 1123 case 'v': 1124 verbose++; 1125 break; 1126 case 'i': 1127 interval_sec = atoi(optarg); 1128 break; 1129 case 'M': 1130 sscanf(optarg, "%x", &extra_msr_offset); 1131 if (verbose > 1) 1132 fprintf(stderr, "MSR 0x%X\n", extra_msr_offset); 1133 break; 1134 default: 1135 usage(); 1136 } 1137 } 1138 } 1139 1140 int main(int argc, char **argv) 1141 { 1142 cmdline(argc, argv); 1143 1144 if (verbose > 1) 1145 fprintf(stderr, "turbostat Dec 6, 2010" 1146 " - Len Brown <lenb@kernel.org>\n"); 1147 if (verbose > 1) 1148 fprintf(stderr, "http://userweb.kernel.org/~lenb/acpi/utils/pmtools/turbostat/\n"); 1149 1150 turbostat_init(); 1151 1152 /* 1153 * if any params left, it must be a command to fork 1154 */ 1155 if (argc - optind) 1156 return fork_it(argv + optind); 1157 else 1158 turbostat_loop(); 1159 1160 return 0; 1161 } 1162