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-rw-r--r--tools/power/x86/turbostat/turbostat.c1048
1 files changed, 1048 insertions, 0 deletions
diff --git a/tools/power/x86/turbostat/turbostat.c b/tools/power/x86/turbostat/turbostat.c
new file mode 100644
index 000000000000..4c6983de6fd9
--- /dev/null
+++ b/tools/power/x86/turbostat/turbostat.c
@@ -0,0 +1,1048 @@
1/*
2 * turbostat -- show CPU frequency and C-state residency
3 * on modern Intel turbo-capable processors.
4 *
5 * Copyright (c) 2010, 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#include <stdio.h>
23#include <unistd.h>
24#include <sys/types.h>
25#include <sys/wait.h>
26#include <sys/stat.h>
27#include <sys/resource.h>
28#include <fcntl.h>
29#include <signal.h>
30#include <sys/time.h>
31#include <stdlib.h>
32#include <dirent.h>
33#include <string.h>
34#include <ctype.h>
35
36#define MSR_TSC 0x10
37#define MSR_NEHALEM_PLATFORM_INFO 0xCE
38#define MSR_NEHALEM_TURBO_RATIO_LIMIT 0x1AD
39#define MSR_APERF 0xE8
40#define MSR_MPERF 0xE7
41#define MSR_PKG_C2_RESIDENCY 0x60D /* SNB only */
42#define MSR_PKG_C3_RESIDENCY 0x3F8
43#define MSR_PKG_C6_RESIDENCY 0x3F9
44#define MSR_PKG_C7_RESIDENCY 0x3FA /* SNB only */
45#define MSR_CORE_C3_RESIDENCY 0x3FC
46#define MSR_CORE_C6_RESIDENCY 0x3FD
47#define MSR_CORE_C7_RESIDENCY 0x3FE /* SNB only */
48
49char *proc_stat = "/proc/stat";
50unsigned int interval_sec = 5; /* set with -i interval_sec */
51unsigned int verbose; /* set with -v */
52unsigned int skip_c0;
53unsigned int skip_c1;
54unsigned int do_nhm_cstates;
55unsigned int do_snb_cstates;
56unsigned int has_aperf;
57unsigned int units = 1000000000; /* Ghz etc */
58unsigned int genuine_intel;
59unsigned int has_invariant_tsc;
60unsigned int do_nehalem_platform_info;
61unsigned int do_nehalem_turbo_ratio_limit;
62unsigned int extra_msr_offset;
63double bclk;
64unsigned int show_pkg;
65unsigned int show_core;
66unsigned int show_cpu;
67
68int aperf_mperf_unstable;
69int backwards_count;
70char *progname;
71int need_reinitialize;
72
73int num_cpus;
74
75typedef struct per_cpu_counters {
76 unsigned long long tsc; /* per thread */
77 unsigned long long aperf; /* per thread */
78 unsigned long long mperf; /* per thread */
79 unsigned long long c1; /* per thread (calculated) */
80 unsigned long long c3; /* per core */
81 unsigned long long c6; /* per core */
82 unsigned long long c7; /* per core */
83 unsigned long long pc2; /* per package */
84 unsigned long long pc3; /* per package */
85 unsigned long long pc6; /* per package */
86 unsigned long long pc7; /* per package */
87 unsigned long long extra_msr; /* per thread */
88 int pkg;
89 int core;
90 int cpu;
91 struct per_cpu_counters *next;
92} PCC;
93
94PCC *pcc_even;
95PCC *pcc_odd;
96PCC *pcc_delta;
97PCC *pcc_average;
98struct timeval tv_even;
99struct timeval tv_odd;
100struct timeval tv_delta;
101
102unsigned long long get_msr(int cpu, off_t offset)
103{
104 ssize_t retval;
105 unsigned long long msr;
106 char pathname[32];
107 int fd;
108
109 sprintf(pathname, "/dev/cpu/%d/msr", cpu);
110 fd = open(pathname, O_RDONLY);
111 if (fd < 0) {
112 perror(pathname);
113 need_reinitialize = 1;
114 return 0;
115 }
116
117 retval = pread(fd, &msr, sizeof msr, offset);
118 if (retval != sizeof msr) {
119 fprintf(stderr, "cpu%d pread(..., 0x%zx) = %jd\n",
120 cpu, offset, retval);
121 exit(-2);
122 }
123
124 close(fd);
125 return msr;
126}
127
128void print_header()
129{
130 if (show_pkg)
131 fprintf(stderr, "pkg ");
132 if (show_core)
133 fprintf(stderr, "core");
134 if (show_cpu)
135 fprintf(stderr, " CPU");
136 if (do_nhm_cstates)
137 fprintf(stderr, " %%c0 ");
138 if (has_aperf)
139 fprintf(stderr, " GHz");
140 fprintf(stderr, " TSC");
141 if (do_nhm_cstates)
142 fprintf(stderr, " %%c1 ");
143 if (do_nhm_cstates)
144 fprintf(stderr, " %%c3 ");
145 if (do_nhm_cstates)
146 fprintf(stderr, " %%c6 ");
147 if (do_snb_cstates)
148 fprintf(stderr, " %%c7 ");
149 if (do_snb_cstates)
150 fprintf(stderr, " %%pc2 ");
151 if (do_nhm_cstates)
152 fprintf(stderr, " %%pc3 ");
153 if (do_nhm_cstates)
154 fprintf(stderr, " %%pc6 ");
155 if (do_snb_cstates)
156 fprintf(stderr, " %%pc7 ");
157 if (extra_msr_offset)
158 fprintf(stderr, " MSR 0x%x ", extra_msr_offset);
159
160 putc('\n', stderr);
161}
162
163void dump_pcc(PCC *pcc)
164{
165 fprintf(stderr, "package: %d ", pcc->pkg);
166 fprintf(stderr, "core:: %d ", pcc->core);
167 fprintf(stderr, "CPU: %d ", pcc->cpu);
168 fprintf(stderr, "TSC: %016llX\n", pcc->tsc);
169 fprintf(stderr, "c3: %016llX\n", pcc->c3);
170 fprintf(stderr, "c6: %016llX\n", pcc->c6);
171 fprintf(stderr, "c7: %016llX\n", pcc->c7);
172 fprintf(stderr, "aperf: %016llX\n", pcc->aperf);
173 fprintf(stderr, "pc2: %016llX\n", pcc->pc2);
174 fprintf(stderr, "pc3: %016llX\n", pcc->pc3);
175 fprintf(stderr, "pc6: %016llX\n", pcc->pc6);
176 fprintf(stderr, "pc7: %016llX\n", pcc->pc7);
177 fprintf(stderr, "msr0x%x: %016llX\n", extra_msr_offset, pcc->extra_msr);
178}
179
180void dump_list(PCC *pcc)
181{
182 printf("dump_list 0x%p\n", pcc);
183
184 for (; pcc; pcc = pcc->next)
185 dump_pcc(pcc);
186}
187
188void print_pcc(PCC *p)
189{
190 double interval_float;
191
192 interval_float = tv_delta.tv_sec + tv_delta.tv_usec/1000000.0;
193
194 /* topology columns, print blanks on 1st (average) line */
195 if (p == pcc_average) {
196 if (show_pkg)
197 fprintf(stderr, " ");
198 if (show_core)
199 fprintf(stderr, " ");
200 if (show_cpu)
201 fprintf(stderr, " ");
202 } else {
203 if (show_pkg)
204 fprintf(stderr, "%4d", p->pkg);
205 if (show_core)
206 fprintf(stderr, "%4d", p->core);
207 if (show_cpu)
208 fprintf(stderr, "%4d", p->cpu);
209 }
210
211 /* %c0 */
212 if (do_nhm_cstates) {
213 if (!skip_c0)
214 fprintf(stderr, "%7.2f", 100.0 * p->mperf/p->tsc);
215 else
216 fprintf(stderr, " ****");
217 }
218
219 /* GHz */
220 if (has_aperf) {
221 if (!aperf_mperf_unstable) {
222 fprintf(stderr, "%5.2f",
223 1.0 * p->tsc / units * p->aperf /
224 p->mperf / interval_float);
225 } else {
226 if (p->aperf > p->tsc || p->mperf > p->tsc) {
227 fprintf(stderr, " ****");
228 } else {
229 fprintf(stderr, "%4.1f*",
230 1.0 * p->tsc /
231 units * p->aperf /
232 p->mperf / interval_float);
233 }
234 }
235 }
236
237 /* TSC */
238 fprintf(stderr, "%5.2f", 1.0 * p->tsc/units/interval_float);
239
240 if (do_nhm_cstates) {
241 if (!skip_c1)
242 fprintf(stderr, "%7.2f", 100.0 * p->c1/p->tsc);
243 else
244 fprintf(stderr, " ****");
245 }
246 if (do_nhm_cstates)
247 fprintf(stderr, "%7.2f", 100.0 * p->c3/p->tsc);
248 if (do_nhm_cstates)
249 fprintf(stderr, "%7.2f", 100.0 * p->c6/p->tsc);
250 if (do_snb_cstates)
251 fprintf(stderr, "%7.2f", 100.0 * p->c7/p->tsc);
252 if (do_snb_cstates)
253 fprintf(stderr, "%7.2f", 100.0 * p->pc2/p->tsc);
254 if (do_nhm_cstates)
255 fprintf(stderr, "%7.2f", 100.0 * p->pc3/p->tsc);
256 if (do_nhm_cstates)
257 fprintf(stderr, "%7.2f", 100.0 * p->pc6/p->tsc);
258 if (do_snb_cstates)
259 fprintf(stderr, "%7.2f", 100.0 * p->pc7/p->tsc);
260 if (extra_msr_offset)
261 fprintf(stderr, " 0x%016llx", p->extra_msr);
262 putc('\n', stderr);
263}
264
265void print_counters(PCC *cnt)
266{
267 PCC *pcc;
268
269 print_header();
270
271 if (num_cpus > 1)
272 print_pcc(pcc_average);
273
274 for (pcc = cnt; pcc != NULL; pcc = pcc->next)
275 print_pcc(pcc);
276
277}
278
279#define SUBTRACT_COUNTER(after, before, delta) (delta = (after - before), (before > after))
280
281
282int compute_delta(PCC *after, PCC *before, PCC *delta)
283{
284 int errors = 0;
285 int perf_err = 0;
286
287 skip_c0 = skip_c1 = 0;
288
289 for ( ; after && before && delta;
290 after = after->next, before = before->next, delta = delta->next) {
291 if (before->cpu != after->cpu) {
292 printf("cpu configuration changed: %d != %d\n",
293 before->cpu, after->cpu);
294 return -1;
295 }
296
297 if (SUBTRACT_COUNTER(after->tsc, before->tsc, delta->tsc)) {
298 fprintf(stderr, "cpu%d TSC went backwards %llX to %llX\n",
299 before->cpu, before->tsc, after->tsc);
300 errors++;
301 }
302 /* check for TSC < 1 Mcycles over interval */
303 if (delta->tsc < (1000 * 1000)) {
304 fprintf(stderr, "Insanely slow TSC rate,"
305 " TSC stops in idle?\n");
306 fprintf(stderr, "You can disable all c-states"
307 " by booting with \"idle=poll\"\n");
308 fprintf(stderr, "or just the deep ones with"
309 " \"processor.max_cstate=1\"\n");
310 exit(-3);
311 }
312 if (SUBTRACT_COUNTER(after->c3, before->c3, delta->c3)) {
313 fprintf(stderr, "cpu%d c3 counter went backwards %llX to %llX\n",
314 before->cpu, before->c3, after->c3);
315 errors++;
316 }
317 if (SUBTRACT_COUNTER(after->c6, before->c6, delta->c6)) {
318 fprintf(stderr, "cpu%d c6 counter went backwards %llX to %llX\n",
319 before->cpu, before->c6, after->c6);
320 errors++;
321 }
322 if (SUBTRACT_COUNTER(after->c7, before->c7, delta->c7)) {
323 fprintf(stderr, "cpu%d c7 counter went backwards %llX to %llX\n",
324 before->cpu, before->c7, after->c7);
325 errors++;
326 }
327 if (SUBTRACT_COUNTER(after->pc2, before->pc2, delta->pc2)) {
328 fprintf(stderr, "cpu%d pc2 counter went backwards %llX to %llX\n",
329 before->cpu, before->pc2, after->pc2);
330 errors++;
331 }
332 if (SUBTRACT_COUNTER(after->pc3, before->pc3, delta->pc3)) {
333 fprintf(stderr, "cpu%d pc3 counter went backwards %llX to %llX\n",
334 before->cpu, before->pc3, after->pc3);
335 errors++;
336 }
337 if (SUBTRACT_COUNTER(after->pc6, before->pc6, delta->pc6)) {
338 fprintf(stderr, "cpu%d pc6 counter went backwards %llX to %llX\n",
339 before->cpu, before->pc6, after->pc6);
340 errors++;
341 }
342 if (SUBTRACT_COUNTER(after->pc7, before->pc7, delta->pc7)) {
343 fprintf(stderr, "cpu%d pc7 counter went backwards %llX to %llX\n",
344 before->cpu, before->pc7, after->pc7);
345 errors++;
346 }
347
348 perf_err = SUBTRACT_COUNTER(after->aperf, before->aperf, delta->aperf);
349 if (perf_err) {
350 fprintf(stderr, "cpu%d aperf counter went backwards %llX to %llX\n",
351 before->cpu, before->aperf, after->aperf);
352 }
353 perf_err |= SUBTRACT_COUNTER(after->mperf, before->mperf, delta->mperf);
354 if (perf_err) {
355 fprintf(stderr, "cpu%d mperf counter went backwards %llX to %llX\n",
356 before->cpu, before->mperf, after->mperf);
357 }
358 if (perf_err) {
359 if (!aperf_mperf_unstable) {
360 fprintf(stderr, "%s: APERF or MPERF went backwards *\n", progname);
361 fprintf(stderr, "* Frequency results do not cover entire interval *\n");
362 fprintf(stderr, "* fix this by running Linux-2.6.30 or later *\n");
363
364 aperf_mperf_unstable = 1;
365 }
366 /*
367 * mperf delta is likely a huge "positive" number
368 * can not use it for calculating c0 time
369 */
370 skip_c0 = 1;
371 skip_c1 = 1;
372 }
373
374 /*
375 * As mperf and tsc collection are not atomic,
376 * it is possible for mperf's non-halted cycles
377 * to exceed TSC's all cycles: show c1 = 0% in that case.
378 */
379 if (delta->mperf > delta->tsc)
380 delta->c1 = 0;
381 else /* normal case, derive c1 */
382 delta->c1 = delta->tsc - delta->mperf
383 - delta->c3 - delta->c6 - delta->c7;
384
385 if (delta->mperf == 0)
386 delta->mperf = 1; /* divide by 0 protection */
387
388 /*
389 * for "extra msr", just copy the latest w/o subtracting
390 */
391 delta->extra_msr = after->extra_msr;
392 if (errors) {
393 fprintf(stderr, "ERROR cpu%d before:\n", before->cpu);
394 dump_pcc(before);
395 fprintf(stderr, "ERROR cpu%d after:\n", before->cpu);
396 dump_pcc(after);
397 errors = 0;
398 }
399 }
400 return 0;
401}
402
403void compute_average(PCC *delta, PCC *avg)
404{
405 PCC *sum;
406
407 sum = calloc(1, sizeof(PCC));
408 if (sum == NULL) {
409 perror("calloc sum");
410 exit(1);
411 }
412
413 for (; delta; delta = delta->next) {
414 sum->tsc += delta->tsc;
415 sum->c1 += delta->c1;
416 sum->c3 += delta->c3;
417 sum->c6 += delta->c6;
418 sum->c7 += delta->c7;
419 sum->aperf += delta->aperf;
420 sum->mperf += delta->mperf;
421 sum->pc2 += delta->pc2;
422 sum->pc3 += delta->pc3;
423 sum->pc6 += delta->pc6;
424 sum->pc7 += delta->pc7;
425 }
426 avg->tsc = sum->tsc/num_cpus;
427 avg->c1 = sum->c1/num_cpus;
428 avg->c3 = sum->c3/num_cpus;
429 avg->c6 = sum->c6/num_cpus;
430 avg->c7 = sum->c7/num_cpus;
431 avg->aperf = sum->aperf/num_cpus;
432 avg->mperf = sum->mperf/num_cpus;
433 avg->pc2 = sum->pc2/num_cpus;
434 avg->pc3 = sum->pc3/num_cpus;
435 avg->pc6 = sum->pc6/num_cpus;
436 avg->pc7 = sum->pc7/num_cpus;
437
438 free(sum);
439}
440
441void get_counters(PCC *pcc)
442{
443 for ( ; pcc; pcc = pcc->next) {
444 pcc->tsc = get_msr(pcc->cpu, MSR_TSC);
445 if (do_nhm_cstates)
446 pcc->c3 = get_msr(pcc->cpu, MSR_CORE_C3_RESIDENCY);
447 if (do_nhm_cstates)
448 pcc->c6 = get_msr(pcc->cpu, MSR_CORE_C6_RESIDENCY);
449 if (do_snb_cstates)
450 pcc->c7 = get_msr(pcc->cpu, MSR_CORE_C7_RESIDENCY);
451 if (has_aperf)
452 pcc->aperf = get_msr(pcc->cpu, MSR_APERF);
453 if (has_aperf)
454 pcc->mperf = get_msr(pcc->cpu, MSR_MPERF);
455 if (do_snb_cstates)
456 pcc->pc2 = get_msr(pcc->cpu, MSR_PKG_C2_RESIDENCY);
457 if (do_nhm_cstates)
458 pcc->pc3 = get_msr(pcc->cpu, MSR_PKG_C3_RESIDENCY);
459 if (do_nhm_cstates)
460 pcc->pc6 = get_msr(pcc->cpu, MSR_PKG_C6_RESIDENCY);
461 if (do_snb_cstates)
462 pcc->pc7 = get_msr(pcc->cpu, MSR_PKG_C7_RESIDENCY);
463 if (extra_msr_offset)
464 pcc->extra_msr = get_msr(pcc->cpu, extra_msr_offset);
465 }
466}
467
468
469void print_nehalem_info()
470{
471 unsigned long long msr;
472 unsigned int ratio;
473
474 if (!do_nehalem_platform_info)
475 return;
476
477 msr = get_msr(0, MSR_NEHALEM_PLATFORM_INFO);
478
479 ratio = (msr >> 40) & 0xFF;
480 fprintf(stderr, "%d * %.0f = %.0f MHz max efficiency\n",
481 ratio, bclk, ratio * bclk);
482
483 ratio = (msr >> 8) & 0xFF;
484 fprintf(stderr, "%d * %.0f = %.0f MHz TSC frequency\n",
485 ratio, bclk, ratio * bclk);
486
487 if (verbose > 1)
488 fprintf(stderr, "MSR_NEHALEM_PLATFORM_INFO: 0x%llx\n", msr);
489
490 if (!do_nehalem_turbo_ratio_limit)
491 return;
492
493 msr = get_msr(0, MSR_NEHALEM_TURBO_RATIO_LIMIT);
494
495 ratio = (msr >> 24) & 0xFF;
496 if (ratio)
497 fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 4 active cores\n",
498 ratio, bclk, ratio * bclk);
499
500 ratio = (msr >> 16) & 0xFF;
501 if (ratio)
502 fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 3 active cores\n",
503 ratio, bclk, ratio * bclk);
504
505 ratio = (msr >> 8) & 0xFF;
506 if (ratio)
507 fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 2 active cores\n",
508 ratio, bclk, ratio * bclk);
509
510 ratio = (msr >> 0) & 0xFF;
511 if (ratio)
512 fprintf(stderr, "%d * %.0f = %.0f MHz max turbo 1 active cores\n",
513 ratio, bclk, ratio * bclk);
514
515}
516
517void free_counter_list(PCC *list)
518{
519 PCC *p;
520
521 for (p = list; p; ) {
522 PCC *free_me;
523
524 free_me = p;
525 p = p->next;
526 free(free_me);
527 }
528 return;
529}
530
531void free_all_counters(void)
532{
533 free_counter_list(pcc_even);
534 pcc_even = NULL;
535
536 free_counter_list(pcc_odd);
537 pcc_odd = NULL;
538
539 free_counter_list(pcc_delta);
540 pcc_delta = NULL;
541
542 free_counter_list(pcc_average);
543 pcc_average = NULL;
544}
545
546void insert_cpu_counters(PCC **list, PCC *new)
547{
548 PCC *prev;
549
550 /*
551 * list was empty
552 */
553 if (*list == NULL) {
554 new->next = *list;
555 *list = new;
556 return;
557 }
558
559 show_cpu = 1; /* there is more than one CPU */
560
561 /*
562 * insert on front of list.
563 * It is sorted by ascending package#, core#, cpu#
564 */
565 if (((*list)->pkg > new->pkg) ||
566 (((*list)->pkg == new->pkg) && ((*list)->core > new->core)) ||
567 (((*list)->pkg == new->pkg) && ((*list)->core == new->core) && ((*list)->cpu > new->cpu))) {
568 new->next = *list;
569 *list = new;
570 return;
571 }
572
573 prev = *list;
574
575 while (prev->next && (prev->next->pkg < new->pkg)) {
576 prev = prev->next;
577 show_pkg = 1; /* there is more than 1 package */
578 }
579
580 while (prev->next && (prev->next->pkg == new->pkg)
581 && (prev->next->core < new->core)) {
582 prev = prev->next;
583 show_core = 1; /* there is more than 1 core */
584 }
585
586 while (prev->next && (prev->next->pkg == new->pkg)
587 && (prev->next->core == new->core)
588 && (prev->next->cpu < new->cpu)) {
589 prev = prev->next;
590 }
591
592 /*
593 * insert after "prev"
594 */
595 new->next = prev->next;
596 prev->next = new;
597
598 return;
599}
600
601void alloc_new_cpu_counters(int pkg, int core, int cpu)
602{
603 PCC *new;
604
605 if (verbose > 1)
606 printf("pkg%d core%d, cpu%d\n", pkg, core, cpu);
607
608 new = (PCC *)calloc(1, sizeof(PCC));
609 if (new == NULL) {
610 perror("calloc");
611 exit(1);
612 }
613 new->pkg = pkg;
614 new->core = core;
615 new->cpu = cpu;
616 insert_cpu_counters(&pcc_odd, new);
617
618 new = (PCC *)calloc(1, sizeof(PCC));
619 if (new == NULL) {
620 perror("calloc");
621 exit(1);
622 }
623 new->pkg = pkg;
624 new->core = core;
625 new->cpu = cpu;
626 insert_cpu_counters(&pcc_even, new);
627
628 new = (PCC *)calloc(1, sizeof(PCC));
629 if (new == NULL) {
630 perror("calloc");
631 exit(1);
632 }
633 new->pkg = pkg;
634 new->core = core;
635 new->cpu = cpu;
636 insert_cpu_counters(&pcc_delta, new);
637
638 new = (PCC *)calloc(1, sizeof(PCC));
639 if (new == NULL) {
640 perror("calloc");
641 exit(1);
642 }
643 new->pkg = pkg;
644 new->core = core;
645 new->cpu = cpu;
646 pcc_average = new;
647}
648
649int get_physical_package_id(int cpu)
650{
651 char path[64];
652 FILE *filep;
653 int pkg;
654
655 sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/physical_package_id", cpu);
656 filep = fopen(path, "r");
657 if (filep == NULL) {
658 perror(path);
659 exit(1);
660 }
661 fscanf(filep, "%d", &pkg);
662 fclose(filep);
663 return pkg;
664}
665
666int get_core_id(int cpu)
667{
668 char path[64];
669 FILE *filep;
670 int core;
671
672 sprintf(path, "/sys/devices/system/cpu/cpu%d/topology/core_id", cpu);
673 filep = fopen(path, "r");
674 if (filep == NULL) {
675 perror(path);
676 exit(1);
677 }
678 fscanf(filep, "%d", &core);
679 fclose(filep);
680 return core;
681}
682
683/*
684 * run func(index, cpu) on every cpu in /proc/stat
685 */
686
687int for_all_cpus(void (func)(int, int, int))
688{
689 FILE *fp;
690 int cpu_count;
691 int retval;
692
693 fp = fopen(proc_stat, "r");
694 if (fp == NULL) {
695 perror(proc_stat);
696 exit(1);
697 }
698
699 retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n");
700 if (retval != 0) {
701 perror("/proc/stat format");
702 exit(1);
703 }
704
705 for (cpu_count = 0; ; cpu_count++) {
706 int cpu;
707
708 retval = fscanf(fp, "cpu%u %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n", &cpu);
709 if (retval != 1)
710 break;
711
712 func(get_physical_package_id(cpu), get_core_id(cpu), cpu);
713 }
714 fclose(fp);
715 return cpu_count;
716}
717
718void re_initialize(void)
719{
720 printf("turbostat: topology changed, re-initializing.\n");
721 free_all_counters();
722 num_cpus = for_all_cpus(alloc_new_cpu_counters);
723 need_reinitialize = 0;
724 printf("num_cpus is now %d\n", num_cpus);
725}
726
727void dummy(int pkg, int core, int cpu) { return; }
728/*
729 * check to see if a cpu came on-line
730 */
731void verify_num_cpus()
732{
733 int new_num_cpus;
734
735 new_num_cpus = for_all_cpus(dummy);
736
737 if (new_num_cpus != num_cpus) {
738 if (verbose)
739 printf("num_cpus was %d, is now %d\n",
740 num_cpus, new_num_cpus);
741 need_reinitialize = 1;
742 }
743
744 return;
745}
746
747void turbostat_loop()
748{
749restart:
750 get_counters(pcc_even);
751 gettimeofday(&tv_even, (struct timezone *)NULL);
752
753 while (1) {
754 verify_num_cpus();
755 if (need_reinitialize) {
756 re_initialize();
757 goto restart;
758 }
759 sleep(interval_sec);
760 get_counters(pcc_odd);
761 gettimeofday(&tv_odd, (struct timezone *)NULL);
762
763 compute_delta(pcc_odd, pcc_even, pcc_delta);
764 timersub(&tv_odd, &tv_even, &tv_delta);
765 compute_average(pcc_delta, pcc_average);
766 print_counters(pcc_delta);
767 if (need_reinitialize) {
768 re_initialize();
769 goto restart;
770 }
771 sleep(interval_sec);
772 get_counters(pcc_even);
773 gettimeofday(&tv_even, (struct timezone *)NULL);
774 compute_delta(pcc_even, pcc_odd, pcc_delta);
775 timersub(&tv_even, &tv_odd, &tv_delta);
776 compute_average(pcc_delta, pcc_average);
777 print_counters(pcc_delta);
778 }
779}
780
781void check_dev_msr()
782{
783 struct stat sb;
784
785 if (stat("/dev/cpu/0/msr", &sb)) {
786 fprintf(stderr, "no /dev/cpu/0/msr\n");
787 fprintf(stderr, "Try \"# modprobe msr\"\n");
788 exit(-5);
789 }
790}
791
792void check_super_user()
793{
794 if (getuid() != 0) {
795 fprintf(stderr, "must be root\n");
796 exit(-6);
797 }
798}
799
800int has_nehalem_turbo_ratio_limit(unsigned int family, unsigned int model)
801{
802 if (!genuine_intel)
803 return 0;
804
805 if (family != 6)
806 return 0;
807
808 switch (model) {
809 case 0x1A: /* Core i7, Xeon 5500 series - Bloomfield, Gainstown NHM-EP */
810 case 0x1E: /* Core i7 and i5 Processor - Clarksfield, Lynnfield, Jasper Forest */
811 case 0x1F: /* Core i7 and i5 Processor - Nehalem */
812 case 0x25: /* Westmere Client - Clarkdale, Arrandale */
813 case 0x2C: /* Westmere EP - Gulftown */
814 case 0x2A: /* SNB */
815 case 0x2D: /* SNB Xeon */
816 return 1;
817 case 0x2E: /* Nehalem-EX Xeon - Beckton */
818 case 0x2F: /* Westmere-EX Xeon - Eagleton */
819 default:
820 return 0;
821 }
822}
823
824int is_snb(unsigned int family, unsigned int model)
825{
826 if (!genuine_intel)
827 return 0;
828
829 switch (model) {
830 case 0x2A:
831 case 0x2D:
832 return 1;
833 }
834 return 0;
835}
836
837double discover_bclk(unsigned int family, unsigned int model)
838{
839 if (is_snb(family, model))
840 return 100.00;
841 else
842 return 133.33;
843}
844
845void check_cpuid()
846{
847 unsigned int eax, ebx, ecx, edx, max_level;
848 unsigned int fms, family, model, stepping;
849
850 eax = ebx = ecx = edx = 0;
851
852 asm("cpuid" : "=a" (max_level), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0));
853
854 if (ebx == 0x756e6547 && edx == 0x49656e69 && ecx == 0x6c65746e)
855 genuine_intel = 1;
856
857 if (verbose)
858 fprintf(stderr, "%.4s%.4s%.4s ",
859 (char *)&ebx, (char *)&edx, (char *)&ecx);
860
861 asm("cpuid" : "=a" (fms), "=c" (ecx), "=d" (edx) : "a" (1) : "ebx");
862 family = (fms >> 8) & 0xf;
863 model = (fms >> 4) & 0xf;
864 stepping = fms & 0xf;
865 if (family == 6 || family == 0xf)
866 model += ((fms >> 16) & 0xf) << 4;
867
868 if (verbose)
869 fprintf(stderr, "%d CPUID levels; family:model:stepping 0x%x:%x:%x (%d:%d:%d)\n",
870 max_level, family, model, stepping, family, model, stepping);
871
872 if (!(edx & (1 << 5))) {
873 fprintf(stderr, "CPUID: no MSR\n");
874 exit(1);
875 }
876
877 /*
878 * check max extended function levels of CPUID.
879 * This is needed to check for invariant TSC.
880 * This check is valid for both Intel and AMD.
881 */
882 ebx = ecx = edx = 0;
883 asm("cpuid" : "=a" (max_level), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0x80000000));
884
885 if (max_level < 0x80000007) {
886 fprintf(stderr, "CPUID: no invariant TSC (max_level 0x%x)\n", max_level);
887 exit(1);
888 }
889
890 /*
891 * Non-Stop TSC is advertised by CPUID.EAX=0x80000007: EDX.bit8
892 * this check is valid for both Intel and AMD
893 */
894 asm("cpuid" : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0x80000007));
895 has_invariant_tsc = edx && (1 << 8);
896
897 if (!has_invariant_tsc) {
898 fprintf(stderr, "No invariant TSC\n");
899 exit(1);
900 }
901
902 /*
903 * APERF/MPERF is advertised by CPUID.EAX=0x6: ECX.bit0
904 * this check is valid for both Intel and AMD
905 */
906
907 asm("cpuid" : "=a" (eax), "=b" (ebx), "=c" (ecx), "=d" (edx) : "a" (0x6));
908 has_aperf = ecx && (1 << 0);
909 if (!has_aperf) {
910 fprintf(stderr, "No APERF MSR\n");
911 exit(1);
912 }
913
914 do_nehalem_platform_info = genuine_intel && has_invariant_tsc;
915 do_nhm_cstates = genuine_intel; /* all Intel w/ non-stop TSC have NHM counters */
916 do_snb_cstates = is_snb(family, model);
917 bclk = discover_bclk(family, model);
918
919 do_nehalem_turbo_ratio_limit = has_nehalem_turbo_ratio_limit(family, model);
920}
921
922
923void usage()
924{
925 fprintf(stderr, "%s: [-v] [-M MSR#] [-i interval_sec | command ...]\n",
926 progname);
927 exit(1);
928}
929
930
931/*
932 * in /dev/cpu/ return success for names that are numbers
933 * ie. filter out ".", "..", "microcode".
934 */
935int dir_filter(const struct dirent *dirp)
936{
937 if (isdigit(dirp->d_name[0]))
938 return 1;
939 else
940 return 0;
941}
942
943int open_dev_cpu_msr(int dummy1)
944{
945 return 0;
946}
947
948void turbostat_init()
949{
950 check_cpuid();
951
952 check_dev_msr();
953 check_super_user();
954
955 num_cpus = for_all_cpus(alloc_new_cpu_counters);
956
957 if (verbose)
958 print_nehalem_info();
959}
960
961int fork_it(char **argv)
962{
963 int retval;
964 pid_t child_pid;
965 get_counters(pcc_even);
966 gettimeofday(&tv_even, (struct timezone *)NULL);
967
968 child_pid = fork();
969 if (!child_pid) {
970 /* child */
971 execvp(argv[0], argv);
972 } else {
973 int status;
974
975 /* parent */
976 if (child_pid == -1) {
977 perror("fork");
978 exit(1);
979 }
980
981 signal(SIGINT, SIG_IGN);
982 signal(SIGQUIT, SIG_IGN);
983 if (waitpid(child_pid, &status, 0) == -1) {
984 perror("wait");
985 exit(1);
986 }
987 }
988 get_counters(pcc_odd);
989 gettimeofday(&tv_odd, (struct timezone *)NULL);
990 retval = compute_delta(pcc_odd, pcc_even, pcc_delta);
991
992 timersub(&tv_odd, &tv_even, &tv_delta);
993 compute_average(pcc_delta, pcc_average);
994 if (!retval)
995 print_counters(pcc_delta);
996
997 fprintf(stderr, "%.6f sec\n", tv_delta.tv_sec + tv_delta.tv_usec/1000000.0);;
998
999 return 0;
1000}
1001
1002void cmdline(int argc, char **argv)
1003{
1004 int opt;
1005
1006 progname = argv[0];
1007
1008 while ((opt = getopt(argc, argv, "+vi:M:")) != -1) {
1009 switch (opt) {
1010 case 'v':
1011 verbose++;
1012 break;
1013 case 'i':
1014 interval_sec = atoi(optarg);
1015 break;
1016 case 'M':
1017 sscanf(optarg, "%x", &extra_msr_offset);
1018 if (verbose > 1)
1019 fprintf(stderr, "MSR 0x%X\n", extra_msr_offset);
1020 break;
1021 default:
1022 usage();
1023 }
1024 }
1025}
1026
1027int main(int argc, char **argv)
1028{
1029 cmdline(argc, argv);
1030
1031 if (verbose > 1)
1032 fprintf(stderr, "turbostat Dec 6, 2010"
1033 " - Len Brown <lenb@kernel.org>\n");
1034 if (verbose > 1)
1035 fprintf(stderr, "http://userweb.kernel.org/~lenb/acpi/utils/pmtools/turbostat/\n");
1036
1037 turbostat_init();
1038
1039 /*
1040 * if any params left, it must be a command to fork
1041 */
1042 if (argc - optind)
1043 return fork_it(argv + optind);
1044 else
1045 turbostat_loop();
1046
1047 return 0;
1048}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-13 13:40:12 -0500