0cf789e08ee948ceceb5c3bbc599301081a87df6
1 /*
2 * turbostat -- Log CPU frequency and C-state residency
3 * on modern Intel turbo-capable processors for collectd.
4 *
5 * Based on the 'turbostat' tool of the Linux kernel, found at
6 * linux/tools/power/x86/turbostat/turbostat.c:
7 * ----
8 * Copyright (c) 2013 Intel Corporation.
9 * Len Brown <len.brown@intel.com>
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms and conditions of the GNU General Public License,
13 * version 2, as published by the Free Software Foundation.
14 *
15 * This program is distributed in the hope it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
18 * more details.
19 *
20 * You should have received a copy of the GNU General Public License along with
21 * this program; if not, write to the Free Software Foundation, Inc.,
22 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
23 * ----
24 * Ported to collectd by Vincent Brillault <git@lerya.net>
25 */
27 /*
28 * _GNU_SOURCE is required because of the following functions:
29 * - CPU_ISSET_S
30 * - CPU_ZERO_S
31 * - CPU_SET_S
32 * - CPU_FREE
33 * - CPU_ALLOC
34 * - CPU_ALLOC_SIZE
35 */
36 #define _GNU_SOURCE
38 #include <asm/msr-index.h>
39 #include <stdarg.h>
40 #include <stdio.h>
41 #include <err.h>
42 #include <unistd.h>
43 #include <sys/types.h>
44 #include <sys/wait.h>
45 #include <sys/stat.h>
46 #include <sys/resource.h>
47 #include <fcntl.h>
48 #include <signal.h>
49 #include <sys/time.h>
50 #include <stdlib.h>
51 #include <dirent.h>
52 #include <string.h>
53 #include <ctype.h>
54 #include <sched.h>
55 #include <cpuid.h>
57 #include "collectd.h"
58 #include "common.h"
59 #include "plugin.h"
61 #define PLUGIN_NAME "turbostat"
63 /*
64 * This tool uses the Model-Specific Registers (MSRs) present on Intel processors.
65 * The general description each of these registers, depending on the architecture,
66 * can be found in the IntelĀ® 64 and IA-32 Architectures Software Developer Manual,
67 * Volume 3 Chapter 35.
68 */
70 /*
71 * If set, aperf_mperf_unstable disables a/mperf based stats.
72 * This includes: C0 & C1 states, frequency
73 *
74 * This value is automatically set if mperf or aperf go backward
75 */
76 static _Bool aperf_mperf_unstable;
78 /*
79 * Bitmask of the list of core C states supported by the processor.
80 * Currently supported C-states (by this plugin): 3, 6, 7
81 */
82 static unsigned int do_core_cstate;
84 /*
85 * Bitmask of the list of pacages C states supported by the processor.
86 * Currently supported C-states (by this plugin): 2, 3, 6, 7, 8, 9, 10
87 */
88 static unsigned int do_pkg_cstate;
90 /*
91 * Boolean indicating if the processor supports 'Digital temperature sensor'
92 * This feature enables the monitoring of the temperature of each core
93 *
94 * This feature has two limitations:
95 * - if MSR_IA32_TEMPERATURE_TARGET is not supported, the absolute temperature might be wrong
96 * - Temperatures above the tcc_activation_temp are not recorded
97 */
98 static _Bool do_dts;
100 /*
101 * Boolean indicating if the processor supports 'Package thermal management'
102 * This feature allows the monitoring of the temperature of each package
103 *
104 * This feature has two limitations:
105 * - if MSR_IA32_TEMPERATURE_TARGET is not supported, the absolute temperature might be wrong
106 * - Temperatures above the tcc_activation_temp are not recorded
107 */
108 static _Bool do_ptm;
110 /*
111 * Thermal Control Circuit Activation Temperature as configured by the user.
112 * This override the automated detection via MSR_IA32_TEMPERATURE_TARGET
113 * and should only be used if the automated detection fails.
114 */
115 static unsigned int tcc_activation_temp;
117 static unsigned int do_rapl;
118 static double rapl_energy_units;
120 #define RAPL_PKG (1 << 0)
121 /* 0x610 MSR_PKG_POWER_LIMIT */
122 /* 0x611 MSR_PKG_ENERGY_STATUS */
123 #define RAPL_PKG_PERF_STATUS (1 << 1)
124 /* 0x613 MSR_PKG_PERF_STATUS */
125 #define RAPL_PKG_POWER_INFO (1 << 2)
126 /* 0x614 MSR_PKG_POWER_INFO */
128 #define RAPL_DRAM (1 << 3)
129 /* 0x618 MSR_DRAM_POWER_LIMIT */
130 /* 0x619 MSR_DRAM_ENERGY_STATUS */
131 /* 0x61c MSR_DRAM_POWER_INFO */
132 #define RAPL_DRAM_PERF_STATUS (1 << 4)
133 /* 0x61b MSR_DRAM_PERF_STATUS */
135 #define RAPL_CORES (1 << 5)
136 /* 0x638 MSR_PP0_POWER_LIMIT */
137 /* 0x639 MSR_PP0_ENERGY_STATUS */
138 #define RAPL_CORE_POLICY (1 << 6)
139 /* 0x63a MSR_PP0_POLICY */
142 #define RAPL_GFX (1 << 7)
143 /* 0x640 MSR_PP1_POWER_LIMIT */
144 /* 0x641 MSR_PP1_ENERGY_STATUS */
145 /* 0x642 MSR_PP1_POLICY */
146 #define TJMAX_DEFAULT 100
148 cpu_set_t *cpu_present_set, *cpu_affinity_set, *cpu_saved_affinity_set;
149 size_t cpu_present_setsize, cpu_affinity_setsize, cpu_saved_affinity_setsize;
151 struct thread_data {
152 unsigned long long tsc;
153 unsigned long long aperf;
154 unsigned long long mperf;
155 unsigned long long c1;
156 unsigned int smi_count;
157 unsigned int cpu_id;
158 unsigned int flags;
159 #define CPU_IS_FIRST_THREAD_IN_CORE 0x2
160 #define CPU_IS_FIRST_CORE_IN_PACKAGE 0x4
161 } *thread_delta, *thread_even, *thread_odd;
163 struct core_data {
164 unsigned long long c3;
165 unsigned long long c6;
166 unsigned long long c7;
167 unsigned int core_temp_c;
168 unsigned int core_id;
169 } *core_delta, *core_even, *core_odd;
171 struct pkg_data {
172 unsigned long long pc2;
173 unsigned long long pc3;
174 unsigned long long pc6;
175 unsigned long long pc7;
176 unsigned long long pc8;
177 unsigned long long pc9;
178 unsigned long long pc10;
179 unsigned int package_id;
180 unsigned int energy_pkg; /* MSR_PKG_ENERGY_STATUS */
181 unsigned int energy_dram; /* MSR_DRAM_ENERGY_STATUS */
182 unsigned int energy_cores; /* MSR_PP0_ENERGY_STATUS */
183 unsigned int energy_gfx; /* MSR_PP1_ENERGY_STATUS */
184 unsigned int rapl_pkg_perf_status; /* MSR_PKG_PERF_STATUS */
185 unsigned int rapl_dram_perf_status; /* MSR_DRAM_PERF_STATUS */
186 unsigned int tcc_activation_temp;
187 unsigned int pkg_temp_c;
188 } *package_delta, *package_even, *package_odd;
190 #define DELTA_COUNTERS thread_delta, core_delta, package_delta
191 #define ODD_COUNTERS thread_odd, core_odd, package_odd
192 #define EVEN_COUNTERS thread_even, core_even, package_even
193 static _Bool is_even = 1;
195 static _Bool allocated = 0;
196 static _Bool initialized = 0;
198 #define GET_THREAD(thread_base, thread_no, core_no, pkg_no) \
199 (thread_base + \
200 (pkg_no) * topology.num_cores * topology.num_threads + \
201 (core_no) * topology.num_threads + \
202 (thread_no))
203 #define GET_CORE(core_base, core_no, pkg_no) \
204 (core_base + \
205 (pkg_no) * topology.num_cores + \
206 (core_no))
207 #define GET_PKG(pkg_base, pkg_no) (pkg_base + pkg_no)
209 struct cpu_topology {
210 int package_id;
211 int core_id;
212 _Bool first_core_in_package;
213 _Bool first_thread_in_core;
214 };
216 struct topology {
217 int max_cpu_id;
218 int num_packages;
219 int num_cores;
220 int num_threads;
221 struct cpu_topology *cpus;
222 } topology;
224 struct timeval tv_even, tv_odd, tv_delta;
226 enum return_values {
227 OK = 0,
228 ERR_CPU_MIGRATE,
229 ERR_CPU_SAVE_SCHED_AFFINITY,
230 ERR_MSR_IA32_APERF,
231 ERR_MSR_IA32_MPERF,
232 ERR_MSR_SMI_COUNT,
233 ERR_MSR_CORE_C3_RESIDENCY,
234 ERR_MSR_CORE_C6_RESIDENCY,
235 ERR_MSR_CORE_C7_RESIDENCY,
236 ERR_MSR_IA32_THERM_STATUS,
237 ERR_MSR_PKG_C3_RESIDENCY,
238 ERR_MSR_PKG_C6_RESIDENCY,
239 ERR_MSR_PKG_C2_RESIDENCY,
240 ERR_MSR_PKG_C7_RESIDENCY,
241 ERR_MSR_PKG_C8_RESIDENCY,
242 ERR_MSR_PKG_C9_RESIDENCY,
243 ERR_MSR_PKG_C10_RESIDENCY,
244 ERR_MSR_PKG_ENERGY_STATUS,
245 ERR_MSR_PKG_POWER_INFO,
246 ERR_MSR_PP0_ENERGY_STATUS,
247 ERR_MSR_DRAM_ENERGY_STATUS,
248 ERR_MSR_PP1_ENERGY_STATUS,
249 ERR_MSR_PKG_PERF_STATUS,
250 ERR_MSR_DRAM_PERF_STATUS,
251 ERR_MSR_IA32_PACKAGE_THERM_STATUS,
252 ERR_MSR_IA32_TSC,
253 ERR_CPU_NOT_PRESENT,
254 ERR_NO_MSR,
255 ERR_CANT_OPEN_MSR,
256 ERR_CANT_OPEN_FILE,
257 ERR_CANT_READ_NUMBER,
258 ERR_CANT_READ_PROC_STAT,
259 ERR_NO_INVARIANT_TSC,
260 ERR_NO_APERF,
261 ERR_CALLOC,
262 ERR_CPU_ALLOC,
263 ERR_NOT_ROOT,
264 UNSUPPORTED_CPU,
265 };
268 /*****************************
269 * MSR Manipulation helpers *
270 *****************************/
272 /*
273 * Open a MSR device for reading
274 * Can change the scheduling affinity of the current process if multiple_read is 1
275 */
276 static int __attribute__((warn_unused_result))
277 open_msr(int cpu, _Bool multiple_read)
278 {
279 char pathname[32];
280 int fd;
282 /*
283 * If we need to do multiple read, let's migrate to the CPU
284 * Otherwise, we would lose time calling functions on another CPU
285 *
286 * If we are not yet initialized (cpu_affinity_setsize = 0),
287 * we need to skip this optimisation.
288 */
289 if (multiple_read && cpu_affinity_setsize) {
290 CPU_ZERO_S(cpu_affinity_setsize, cpu_affinity_set);
291 CPU_SET_S(cpu, cpu_affinity_setsize, cpu_affinity_set);
292 if (sched_setaffinity(0, cpu_affinity_setsize, cpu_affinity_set) == -1) {
293 ERROR("Could not migrate to CPU %d", cpu);
294 return -ERR_CPU_MIGRATE;
295 }
296 }
298 ssnprintf(pathname, sizeof(pathname), "/dev/cpu/%d/msr", cpu);
299 fd = open(pathname, O_RDONLY);
300 if (fd < 0)
301 return -ERR_CANT_OPEN_MSR;
302 return fd;
303 }
305 /*
306 * Read a single MSR from an open file descriptor
307 */
308 static int __attribute__((warn_unused_result))
309 read_msr(int fd, off_t offset, unsigned long long *msr)
310 {
311 ssize_t retval;
313 retval = pread(fd, msr, sizeof *msr, offset);
315 if (retval != sizeof *msr) {
316 ERROR("MSR offset 0x%llx read failed", (unsigned long long)offset);
317 return -1;
318 }
319 return 0;
320 }
322 /*
323 * Open a MSR device for reading, read the value asked for and close it.
324 * This call will not affect the scheduling affinity of this thread.
325 */
326 static int __attribute__((warn_unused_result))
327 get_msr(int cpu, off_t offset, unsigned long long *msr)
328 {
329 ssize_t retval;
330 int fd;
332 fd = open_msr(cpu, 0);
333 if (fd < 0)
334 return fd;
335 retval = read_msr(fd, offset, msr);
336 close(fd);
337 return retval;
338 }
341 /********************************
342 * Raw data acquisition (1 CPU) *
343 ********************************/
345 /*
346 * Read every data avalaible for a single CPU
347 *
348 * Core data is shared for all threads in one core: extracted only for the first thread
349 * Package data is shared for all core in one package: extracted only for the first thread of the first core
350 *
351 * Side effect: migrates to the targeted CPU
352 */
353 static int __attribute__((warn_unused_result))
354 get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
355 {
356 int cpu = t->cpu_id;
357 unsigned long long msr;
358 int msr_fd;
359 int retval = 0;
361 msr_fd = open_msr(cpu, 1);
362 if (msr_fd < 0)
363 return msr_fd;
365 #define READ_MSR(msr, dst) \
366 do { \
367 if (read_msr(msr_fd, msr, dst)) { \
368 retval = -ERR_##msr; \
369 goto out; \
370 } \
371 } while (0)
373 READ_MSR(MSR_IA32_TSC, &t->tsc);
375 READ_MSR(MSR_IA32_APERF, &t->aperf);
376 READ_MSR(MSR_IA32_MPERF, &t->mperf);
378 READ_MSR(MSR_SMI_COUNT, &msr);
379 t->smi_count = msr & 0xFFFFFFFF;
381 /* collect core counters only for 1st thread in core */
382 if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE)) {
383 retval = 0;
384 goto out;
385 }
387 if (do_core_cstate & (1 << 3))
388 READ_MSR(MSR_CORE_C3_RESIDENCY, &c->c3);
389 if (do_core_cstate & (1 << 6))
390 READ_MSR(MSR_CORE_C6_RESIDENCY, &c->c6);
391 if (do_core_cstate & (1 << 7))
392 READ_MSR(MSR_CORE_C7_RESIDENCY, &c->c7);
394 if (do_dts) {
395 READ_MSR(MSR_IA32_THERM_STATUS, &msr);
396 c->core_temp_c = p->tcc_activation_temp - ((msr >> 16) & 0x7F);
397 }
399 /* collect package counters only for 1st core in package */
400 if (!(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE)) {
401 retval = 0;
402 goto out;
403 }
405 if (do_pkg_cstate & (1 << 2))
406 READ_MSR(MSR_PKG_C2_RESIDENCY, &p->pc2);
407 if (do_pkg_cstate & (1 << 3))
408 READ_MSR(MSR_PKG_C3_RESIDENCY, &p->pc3);
409 if (do_pkg_cstate & (1 << 6))
410 READ_MSR(MSR_PKG_C6_RESIDENCY, &p->pc6);
411 if (do_pkg_cstate & (1 << 7))
412 READ_MSR(MSR_PKG_C7_RESIDENCY, &p->pc7);
413 if (do_pkg_cstate & (1 << 8))
414 READ_MSR(MSR_PKG_C8_RESIDENCY, &p->pc8);
415 if (do_pkg_cstate & (1 << 9))
416 READ_MSR(MSR_PKG_C9_RESIDENCY, &p->pc9);
417 if (do_pkg_cstate & (1 << 10))
418 READ_MSR(MSR_PKG_C10_RESIDENCY, &p->pc10);
420 if (do_rapl & RAPL_PKG) {
421 READ_MSR(MSR_PKG_ENERGY_STATUS, &msr);
422 p->energy_pkg = msr & 0xFFFFFFFF;
423 }
424 if (do_rapl & RAPL_CORES) {
425 READ_MSR(MSR_PP0_ENERGY_STATUS, &msr);
426 p->energy_cores = msr & 0xFFFFFFFF;
427 }
428 if (do_rapl & RAPL_DRAM) {
429 READ_MSR(MSR_DRAM_ENERGY_STATUS, &msr);
430 p->energy_dram = msr & 0xFFFFFFFF;
431 }
432 if (do_rapl & RAPL_GFX) {
433 READ_MSR(MSR_PP1_ENERGY_STATUS, &msr);
434 p->energy_gfx = msr & 0xFFFFFFFF;
435 }
436 if (do_rapl & RAPL_PKG_PERF_STATUS) {
437 READ_MSR(MSR_PKG_PERF_STATUS, &msr);
438 p->rapl_pkg_perf_status = msr & 0xFFFFFFFF;
439 }
440 if (do_rapl & RAPL_DRAM_PERF_STATUS) {
441 READ_MSR(MSR_DRAM_PERF_STATUS, &msr);
442 p->rapl_dram_perf_status = msr & 0xFFFFFFFF;
443 }
444 if (do_ptm) {
445 READ_MSR(MSR_IA32_PACKAGE_THERM_STATUS, &msr);
446 p->pkg_temp_c = p->tcc_activation_temp - ((msr >> 16) & 0x7F);
447 }
449 out:
450 close(msr_fd);
451 return retval;
452 }
455 /**********************************
456 * Evaluating the changes (1 CPU) *
457 **********************************/
459 /*
460 * Do delta = new - old on 32bits cyclique intergers
461 */
462 #define DELTA_WRAP32(delta, new, old) \
463 if (new > old) { \
464 delta = new - old; \
465 } else { \
466 delta = 0x100000000 + new - old; \
467 }
469 /*
470 * Extract the evolution old->new in delta at a package level
471 * (some are not new-delta, e.g. temperature)
472 */
473 static inline void
474 delta_package(struct pkg_data *delta, const struct pkg_data *new, const struct pkg_data *old)
475 {
476 delta->pc2 = new->pc2 - old->pc2;
477 delta->pc3 = new->pc3 - old->pc3;
478 delta->pc6 = new->pc6 - old->pc6;
479 delta->pc7 = new->pc7 - old->pc7;
480 delta->pc8 = new->pc8 - old->pc8;
481 delta->pc9 = new->pc9 - old->pc9;
482 delta->pc10 = new->pc10 - old->pc10;
483 delta->pkg_temp_c = new->pkg_temp_c;
485 DELTA_WRAP32(delta->energy_pkg, new->energy_pkg, old->energy_pkg);
486 DELTA_WRAP32(delta->energy_cores, new->energy_cores, old->energy_cores);
487 DELTA_WRAP32(delta->energy_gfx, new->energy_gfx, old->energy_gfx);
488 DELTA_WRAP32(delta->energy_dram, new->energy_dram, old->energy_dram);
489 DELTA_WRAP32(delta->rapl_pkg_perf_status, new->rapl_pkg_perf_status, old->rapl_pkg_perf_status);
490 DELTA_WRAP32(delta->rapl_dram_perf_status, new->rapl_dram_perf_status, old->rapl_dram_perf_status);
491 }
493 /*
494 * Extract the evolution old->new in delta at a core level
495 * (some are not new-delta, e.g. temperature)
496 */
497 static inline void
498 delta_core(struct core_data *delta, const struct core_data *new, const struct core_data *old)
499 {
500 delta->c3 = new->c3 - old->c3;
501 delta->c6 = new->c6 - old->c6;
502 delta->c7 = new->c7 - old->c7;
503 delta->core_temp_c = new->core_temp_c;
504 }
506 /*
507 * Extract the evolution old->new in delta at a package level
508 * core_delta is required for c1 estimation (tsc - c0 - all core cstates)
509 */
510 static inline int __attribute__((warn_unused_result))
511 delta_thread(struct thread_data *delta, const struct thread_data *new, const struct thread_data *old,
512 const struct core_data *core_delta)
513 {
514 delta->tsc = new->tsc - old->tsc;
516 /* check for TSC < 1 Mcycles over interval */
517 if (delta->tsc < (1000 * 1000)) {
518 WARNING("Insanely slow TSC rate, TSC stops in idle? ");
519 WARNING("You can disable all c-states by booting with \"idle=poll\" ");
520 WARNING("or just the deep ones with \"processor.max_cstate=1\"");
521 return -1;
522 }
524 delta->c1 = new->c1 - old->c1;
526 if ((new->aperf > old->aperf) && (new->mperf > old->mperf)) {
527 delta->aperf = new->aperf - old->aperf;
528 delta->mperf = new->mperf - old->mperf;
529 } else {
530 if (!aperf_mperf_unstable) {
531 WARNING(" APERF or MPERF went backwards * ");
532 WARNING("* Frequency results do not cover entire interval *");
533 WARNING("* fix this by running Linux-2.6.30 or later *");
535 aperf_mperf_unstable = 1;
536 }
537 }
539 /*
540 * As counter collection is not atomic,
541 * it is possible for mperf's non-halted cycles + idle states
542 * to exceed TSC's all cycles: show c1 = 0% in that case.
543 */
544 if ((delta->mperf + core_delta->c3 + core_delta->c6 + core_delta->c7) > delta->tsc)
545 delta->c1 = 0;
546 else {
547 /* normal case, derive c1 */
548 delta->c1 = delta->tsc - delta->mperf - core_delta->c3
549 - core_delta->c6 - core_delta->c7;
550 }
552 if (delta->mperf == 0) {
553 WARNING("cpu%d MPERF 0!", old->cpu_id);
554 delta->mperf = 1; /* divide by 0 protection */
555 }
557 delta->smi_count = new->smi_count - old->smi_count;
559 return 0;
560 }
562 /**********************************
563 * Submitting the results (1 CPU) *
564 **********************************/
566 /*
567 * Submit one gauge value
568 */
569 static void
570 turbostat_submit (const char *plugin_instance,
571 const char *type, const char *type_instance,
572 gauge_t value)
573 {
574 value_list_t vl = VALUE_LIST_INIT;
575 value_t v;
577 v.gauge = value;
578 vl.values = &v;
579 vl.values_len = 1;
580 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
581 sstrncpy (vl.plugin, PLUGIN_NAME, sizeof (vl.plugin));
582 if (plugin_instance != NULL)
583 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
584 sstrncpy (vl.type, type, sizeof (vl.type));
585 if (type_instance != NULL)
586 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
588 plugin_dispatch_values (&vl);
589 }
591 /*
592 * Submit every data for a single CPU
593 *
594 * Core data is shared for all threads in one core: submitted only for the first thread
595 * Package data is shared for all core in one package: submitted only for the first thread of the first core
596 */
597 static int
598 submit_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
599 {
600 char name[12];
601 double interval_float;
603 interval_float = tv_delta.tv_sec + tv_delta.tv_usec/1000000.0;
605 ssnprintf(name, sizeof(name), "cpu%02d", t->cpu_id);
607 if (!aperf_mperf_unstable)
608 turbostat_submit(name, "percent", "c0", 100.0 * t->mperf/t->tsc);
609 if (!aperf_mperf_unstable)
610 turbostat_submit(name, "percent", "c1", 100.0 * t->c1/t->tsc);
612 /* GHz */
613 if ((!aperf_mperf_unstable) || (!(t->aperf > t->tsc || t->mperf > t->tsc)))
614 turbostat_submit(NULL, "frequency", name, 1.0 * t->tsc / 1000000000 * t->aperf / t->mperf / interval_float);
616 /* SMI */
617 turbostat_submit(NULL, "current", name, t->smi_count);
619 /* submit per-core data only for 1st thread in core */
620 if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE))
621 goto done;
623 ssnprintf(name, sizeof(name), "core%02d", c->core_id);
625 if (do_core_cstate & (1 << 3))
626 turbostat_submit(name, "percent", "c3", 100.0 * c->c3/t->tsc);
627 if (do_core_cstate & (1 << 6))
628 turbostat_submit(name, "percent", "c6", 100.0 * c->c6/t->tsc);
629 if (do_core_cstate & (1 << 7))
630 turbostat_submit(name, "percent", "c7", 100.0 * c->c7/t->tsc);
632 if (do_dts)
633 turbostat_submit(NULL, "temperature", name, c->core_temp_c);
635 /* submit per-package data only for 1st core in package */
636 if (!(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
637 goto done;
639 ssnprintf(name, sizeof(name), "pkg%02d", p->package_id);
641 if (do_ptm)
642 turbostat_submit(NULL, "temperature", name, p->pkg_temp_c);
644 if (do_pkg_cstate & (1 << 2))
645 turbostat_submit(name, "percent", "pc2", 100.0 * p->pc2/t->tsc);
646 if (do_pkg_cstate & (1 << 3))
647 turbostat_submit(name, "percent", "pc3", 100.0 * p->pc3/t->tsc);
648 if (do_pkg_cstate & (1 << 6))
649 turbostat_submit(name, "percent", "pc6", 100.0 * p->pc6/t->tsc);
650 if (do_pkg_cstate & (1 << 7))
651 turbostat_submit(name, "percent", "pc7", 100.0 * p->pc7/t->tsc);
652 if (do_pkg_cstate & (1 << 8))
653 turbostat_submit(name, "percent", "pc8", 100.0 * p->pc8/t->tsc);
654 if (do_pkg_cstate & (1 << 9))
655 turbostat_submit(name, "percent", "pc9", 100.0 * p->pc9/t->tsc);
656 if (do_pkg_cstate & (1 << 10))
657 turbostat_submit(name, "percent", "pc10", 100.0 * p->pc10/t->tsc);
659 if (do_rapl) {
660 if (do_rapl & RAPL_PKG)
661 turbostat_submit(name, "power", "Pkg_W", p->energy_pkg * rapl_energy_units / interval_float);
662 if (do_rapl & RAPL_CORES)
663 turbostat_submit(name, "power", "Cor_W", p->energy_cores * rapl_energy_units / interval_float);
664 if (do_rapl & RAPL_GFX)
665 turbostat_submit(name, "power", "GFX_W", p->energy_gfx * rapl_energy_units / interval_float);
666 if (do_rapl & RAPL_DRAM)
667 turbostat_submit(name, "power", "RAM_W", p->energy_dram * rapl_energy_units / interval_float);
668 }
669 done:
670 return 0;
671 }
674 /**********************************
675 * Looping function over all CPUs *
676 **********************************/
678 /*
679 * Check if a given cpu id is in our compiled list of existing CPUs
680 */
681 static int
682 cpu_is_not_present(int cpu)
683 {
684 return !CPU_ISSET_S(cpu, cpu_present_setsize, cpu_present_set);
685 }
687 /*
688 * Loop on all CPUs in topological order
689 *
690 * Skip non-present cpus
691 * Return the error code at the first error or 0
692 */
693 static int __attribute__((warn_unused_result))
694 for_all_cpus(int (func)(struct thread_data *, struct core_data *, struct pkg_data *),
695 struct thread_data *thread_base, struct core_data *core_base, struct pkg_data *pkg_base)
696 {
697 int retval, pkg_no, core_no, thread_no;
699 for (pkg_no = 0; pkg_no < topology.num_packages; ++pkg_no) {
700 for (core_no = 0; core_no < topology.num_cores; ++core_no) {
701 for (thread_no = 0; thread_no < topology.num_threads; ++thread_no) {
702 struct thread_data *t;
703 struct core_data *c;
704 struct pkg_data *p;
706 t = GET_THREAD(thread_base, thread_no, core_no, pkg_no);
708 if (cpu_is_not_present(t->cpu_id))
709 continue;
711 c = GET_CORE(core_base, core_no, pkg_no);
712 p = GET_PKG(pkg_base, pkg_no);
714 retval = func(t, c, p);
715 if (retval)
716 return retval;
717 }
718 }
719 }
720 return 0;
721 }
723 /*
724 * Dedicated loop: Extract every data evolution for all CPU
725 *
726 * Skip non-present cpus
727 * Return the error code at the first error or 0
728 *
729 * Core data is shared for all threads in one core: extracted only for the first thread
730 * Package data is shared for all core in one package: extracted only for the first thread of the first core
731 */
732 static int __attribute__((warn_unused_result))
733 for_all_cpus_delta(const struct thread_data *thread_new_base, const struct core_data *core_new_base, const struct pkg_data *pkg_new_base,
734 const struct thread_data *thread_old_base, const struct core_data *core_old_base, const struct pkg_data *pkg_old_base)
735 {
736 int retval, pkg_no, core_no, thread_no;
738 for (pkg_no = 0; pkg_no < topology.num_packages; ++pkg_no) {
739 for (core_no = 0; core_no < topology.num_cores; ++core_no) {
740 for (thread_no = 0; thread_no < topology.num_threads; ++thread_no) {
741 struct thread_data *t_delta;
742 const struct thread_data *t_old, *t_new;
743 struct core_data *c_delta;
745 /* Get correct pointers for threads */
746 t_delta = GET_THREAD(thread_delta, thread_no, core_no, pkg_no);
747 t_new = GET_THREAD(thread_new_base, thread_no, core_no, pkg_no);
748 t_old = GET_THREAD(thread_old_base, thread_no, core_no, pkg_no);
750 /* Skip threads that disappeared */
751 if (cpu_is_not_present(t_delta->cpu_id))
752 continue;
754 /* c_delta is always required for delta_thread */
755 c_delta = GET_CORE(core_delta, core_no, pkg_no);
757 /* calculate core delta only for 1st thread in core */
758 if (t_new->flags & CPU_IS_FIRST_THREAD_IN_CORE) {
759 const struct core_data *c_old, *c_new;
761 c_new = GET_CORE(core_new_base, core_no, pkg_no);
762 c_old = GET_CORE(core_old_base, core_no, pkg_no);
764 delta_core(c_delta, c_new, c_old);
765 }
767 /* Always calculate thread delta */
768 retval = delta_thread(t_delta, t_new, t_old, c_delta);
769 if (retval)
770 return retval;
772 /* calculate package delta only for 1st core in package */
773 if (t_new->flags & CPU_IS_FIRST_CORE_IN_PACKAGE) {
774 struct pkg_data *p_delta;
775 const struct pkg_data *p_old, *p_new;
777 p_delta = GET_PKG(package_delta, pkg_no);
778 p_new = GET_PKG(pkg_new_base, pkg_no);
779 p_old = GET_PKG(pkg_old_base, pkg_no);
781 delta_package(p_delta, p_new, p_old);
782 }
783 }
784 }
785 }
786 return 0;
787 }
790 /***************
791 * CPU Probing *
792 ***************/
794 /*
795 * MSR_IA32_TEMPERATURE_TARGET indicates the temperature where
796 * the Thermal Control Circuit (TCC) activates.
797 * This is usually equal to tjMax.
798 *
799 * Older processors do not have this MSR, so there we guess,
800 * but also allow conficuration over-ride with "TCCActivationTemp".
801 *
802 * Several MSR temperature values are in units of degrees-C
803 * below this value, including the Digital Thermal Sensor (DTS),
804 * Package Thermal Management Sensor (PTM), and thermal event thresholds.
805 */
806 static int __attribute__((warn_unused_result))
807 set_temperature_target(struct thread_data *t, struct core_data *c, struct pkg_data *p)
808 {
809 unsigned long long msr;
810 unsigned int target_c_local;
812 /* tcc_activation_temp is used only for dts or ptm */
813 if (!(do_dts || do_ptm))
814 return 0;
816 /* this is a per-package concept */
817 if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE) || !(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
818 return 0;
820 if (tcc_activation_temp != 0) {
821 p->tcc_activation_temp = tcc_activation_temp;
822 return 0;
823 }
825 if (get_msr(t->cpu_id, MSR_IA32_TEMPERATURE_TARGET, &msr))
826 goto guess;
828 target_c_local = (msr >> 16) & 0xFF;
830 if (!target_c_local)
831 goto guess;
833 p->tcc_activation_temp = target_c_local;
835 return 0;
837 guess:
838 p->tcc_activation_temp = TJMAX_DEFAULT;
839 WARNING("cpu%d: Guessing tjMax %d C, Please use TCCActivationTemp to specify",
840 t->cpu_id, p->tcc_activation_temp);
842 return 0;
843 }
845 /*
846 * Identify the functionality of the CPU
847 */
848 static int __attribute__((warn_unused_result))
849 probe_cpu()
850 {
851 unsigned int eax, ebx, ecx, edx, max_level;
852 unsigned int fms, family, model;
854 /* CPUID(0):
855 * - EAX: Maximum Input Value for Basic CPUID Information
856 * - EBX: "Genu" (0x756e6547)
857 * - EDX: "ineI" (0x49656e69)
858 * - ECX: "ntel" (0x6c65746e)
859 */
860 max_level = ebx = ecx = edx = 0;
861 __get_cpuid(0, &max_level, &ebx, &ecx, &edx);
862 if (ebx != 0x756e6547 && edx != 0x49656e69 && ecx != 0x6c65746e) {
863 ERROR("Unsupported CPU");
864 return -UNSUPPORTED_CPU;
865 }
867 /* CPUID(1):
868 * - EAX: Version Information: Type, Family, Model, and Stepping ID
869 * + 4-7: Model ID
870 * + 8-11: Family ID
871 * + 12-13: Processor type
872 * + 16-19: Extended Model ID
873 * + 20-27: Extended Family ID
874 * - EDX: Feature Information:
875 * + 5: Support for MSR read/write operations
876 */
877 fms = ebx = ecx = edx = 0;
878 __get_cpuid(1, &fms, &ebx, &ecx, &edx);
879 family = (fms >> 8) & 0xf;
880 model = (fms >> 4) & 0xf;
881 if (family == 0xf)
882 family += (fms >> 20) & 0xf;
883 if (family == 6 || family == 0xf)
884 model += ((fms >> 16) & 0xf) << 4;
885 if (!(edx & (1 << 5))) {
886 ERROR("CPUID: no MSR");
887 return -ERR_NO_MSR;
888 }
890 /*
891 * CPUID(0x80000000):
892 * - EAX: Maximum Input Value for Extended Function CPUID Information
893 *
894 * This allows us to verify if the CPUID(0x80000007) can be called
895 *
896 * This check is valid for both Intel and AMD.
897 */
898 max_level = ebx = ecx = edx = 0;
899 __get_cpuid(0x80000000, &max_level, &ebx, &ecx, &edx);
900 if (max_level < 0x80000007) {
901 ERROR("CPUID: no invariant TSC (max_level 0x%x)", max_level);
902 return -ERR_NO_INVARIANT_TSC;
903 }
905 /*
906 * CPUID(0x80000007):
907 * - EDX:
908 * + 8: Invariant TSC available if set
909 *
910 * This check is valid for both Intel and AMD
911 */
912 eax = ebx = ecx = edx = 0;
913 __get_cpuid(0x80000007, &eax, &ebx, &ecx, &edx);
914 if (!(edx & (1 << 8))) {
915 ERROR("No invariant TSC");
916 return -ERR_NO_INVARIANT_TSC;
917 }
919 /*
920 * CPUID(6):
921 * - EAX:
922 * + 0: Digital temperature sensor is supported if set
923 * + 6: Package thermal management is supported if set
924 * - ECX:
925 * + 0: Hardware Coordination Feedback Capability (Presence of IA32_MPERF and IA32_APERF).
926 * + 3: The processor supports performance-energy bias preference if set.
927 * It also implies the presence of a new architectural MSR called IA32_ENERGY_PERF_BIAS
928 *
929 * This check is valid for both Intel and AMD
930 */
931 eax = ebx = ecx = edx = 0;
932 __get_cpuid(0x6, &eax, &ebx, &ecx, &edx);
933 do_dts = eax & (1 << 0);
934 do_ptm = eax & (1 << 6);
935 if (!(ecx & (1 << 0))) {
936 ERROR("No APERF");
937 return -ERR_NO_APERF;
938 }
940 /*
941 * Enable or disable C states depending on the model and family
942 */
943 if (family == 6) {
944 switch (model) {
945 /* Atom (partial) */
946 case 0x27:
947 do_core_cstate = 0;
948 do_pkg_cstate = (1 << 2) | (1 << 4) | (1 << 6);
949 break;
950 /* Silvermont */
951 case 0x37: /* BYT */
952 case 0x4A:
953 case 0x4D: /* AVN */
954 case 0x5A:
955 case 0x5D:
956 do_core_cstate = (1 << 1) | (1 << 6);
957 do_pkg_cstate = (1 << 6);
958 break;
959 /* Nehalem */
960 case 0x1A: /* Core i7, Xeon 5500 series - Bloomfield, Gainstown NHM-EP */
961 case 0x1E: /* Core i7 and i5 Processor - Clarksfield, Lynnfield, Jasper Forest */
962 case 0x1F: /* Core i7 and i5 Processor - Nehalem */
963 case 0x2E: /* Nehalem-EX Xeon - Beckton */
964 do_core_cstate = (1 << 3) | (1 << 6);
965 do_pkg_cstate = (1 << 3) | (1 << 6) | (1 << 7);
966 break;
967 /* Westmere */
968 case 0x25: /* Westmere Client - Clarkdale, Arrandale */
969 case 0x2C: /* Westmere EP - Gulftown */
970 case 0x2F: /* Westmere-EX Xeon - Eagleton */
971 do_core_cstate = (1 << 3) | (1 << 6);
972 do_pkg_cstate = (1 << 3) | (1 << 6) | (1 << 7);
973 break;
974 /* Sandy Bridge */
975 case 0x2A: /* SNB */
976 case 0x2D: /* SNB Xeon */
977 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
978 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
979 break;
980 /* Ivy Bridge */
981 case 0x3A: /* IVB */
982 case 0x3E: /* IVB Xeon */
983 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
984 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
985 break;
986 /* Haswell Bridge */
987 case 0x3C: /* HSW */
988 case 0x3F: /* HSW */
989 case 0x46: /* HSW */
990 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
991 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
992 break;
993 case 0x45: /* HSW */
994 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
995 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7) | (1 << 8) | (1 << 9) | (1 << 10);
996 break;
997 /* Broadwel */
998 case 0x4F: /* BDW */
999 case 0x56: /* BDX-DE */
1000 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
1001 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
1002 break;
1003 case 0x3D: /* BDW */
1004 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
1005 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7) | (1 << 8) | (1 << 9) | (1 << 10);
1006 break;
1007 default:
1008 ERROR("Unsupported CPU");
1009 }
1010 switch (model) {
1011 case 0x2A:
1012 case 0x3A:
1013 case 0x3C:
1014 case 0x45:
1015 case 0x46:
1016 do_rapl = RAPL_PKG | RAPL_CORES | RAPL_CORE_POLICY | RAPL_PKG_POWER_INFO | RAPL_GFX;
1017 break;
1018 case 0x3F:
1019 do_rapl = RAPL_PKG | RAPL_PKG_POWER_INFO | RAPL_PKG_PERF_STATUS | RAPL_DRAM | RAPL_DRAM_PERF_STATUS;
1020 break;
1021 case 0x2D:
1022 case 0x3E:
1023 do_rapl = RAPL_PKG | RAPL_CORES | RAPL_CORE_POLICY | RAPL_PKG_POWER_INFO | RAPL_PKG_PERF_STATUS | RAPL_DRAM | RAPL_DRAM_PERF_STATUS;
1024 break;
1025 case 0x37:
1026 case 0x4D:
1027 do_rapl = RAPL_PKG | RAPL_CORES;
1028 break;
1029 default:
1030 do_rapl = 0;
1031 }
1032 } else {
1033 ERROR("Unsupported CPU");
1034 return -UNSUPPORTED_CPU;
1035 }
1037 if (do_rapl) {
1038 unsigned long long msr;
1039 if (get_msr(0, MSR_RAPL_POWER_UNIT, &msr))
1040 return 0;
1042 if (model == 0x37)
1043 rapl_energy_units = 1.0 * (1 << (msr >> 8 & 0x1F)) / 1000000;
1044 else
1045 rapl_energy_units = 1.0 / (1 << (msr >> 8 & 0x1F));
1046 }
1048 return 0;
1049 }
1052 /********************
1053 * Topology Probing *
1054 ********************/
1056 /*
1057 * Read a single int from a file.
1058 */
1059 static int __attribute__ ((format(printf,1,2)))
1060 parse_int_file(const char *fmt, ...)
1061 {
1062 va_list args;
1063 char path[PATH_MAX];
1064 FILE *filep;
1065 int value;
1067 va_start(args, fmt);
1068 vsnprintf(path, sizeof(path), fmt, args);
1069 va_end(args);
1070 filep = fopen(path, "r");
1071 if (!filep) {
1072 ERROR("%s: open failed", path);
1073 return -ERR_CANT_OPEN_FILE;
1074 }
1075 if (fscanf(filep, "%d", &value) != 1) {
1076 ERROR("%s: failed to parse number from file", path);
1077 return -ERR_CANT_READ_NUMBER;
1078 }
1079 fclose(filep);
1080 return value;
1081 }
1083 static int
1084 get_threads_on_core(int cpu)
1085 {
1086 char path[80];
1087 FILE *filep;
1088 int sib1, sib2;
1089 int matches;
1090 char character;
1092 ssnprintf(path, sizeof(path), "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", cpu);
1093 filep = fopen(path, "r");
1094 if (!filep) {
1095 ERROR("%s: open failed", path);
1096 return -ERR_CANT_OPEN_FILE;
1097 }
1098 /*
1099 * file format:
1100 * if a pair of number with a character between: 2 siblings (eg. 1-2, or 1,4)
1101 * otherwinse 1 sibling (self).
1102 */
1103 matches = fscanf(filep, "%d%c%d\n", &sib1, &character, &sib2);
1105 fclose(filep);
1107 if (matches == 3)
1108 return 2;
1109 else
1110 return 1;
1111 }
1113 /*
1114 * run func(cpu) on every cpu in /proc/stat
1115 * return max_cpu number
1116 */
1117 static int __attribute__((warn_unused_result))
1118 for_all_proc_cpus(int (func)(int))
1119 {
1120 FILE *fp;
1121 int cpu_num;
1122 int retval;
1124 fp = fopen("/proc/stat", "r");
1125 if (!fp) {
1126 ERROR("Failed to open /proc/stat");
1127 return -ERR_CANT_OPEN_FILE;
1128 }
1130 retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n");
1131 if (retval != 0) {
1132 ERROR("Failed to parse /proc/stat");
1133 fclose(fp);
1134 return -ERR_CANT_READ_PROC_STAT;
1135 }
1137 while (1) {
1138 retval = fscanf(fp, "cpu%u %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n", &cpu_num);
1139 if (retval != 1)
1140 break;
1142 retval = func(cpu_num);
1143 if (retval) {
1144 fclose(fp);
1145 return(retval);
1146 }
1147 }
1148 fclose(fp);
1149 return 0;
1150 }
1152 /*
1153 * Update the stored topology.max_cpu_id
1154 */
1155 static int
1156 update_max_cpu_id(int cpu)
1157 {
1158 if (topology.max_cpu_id < cpu)
1159 topology.max_cpu_id = cpu;
1160 return 0;
1161 }
1163 static int
1164 mark_cpu_present(int cpu)
1165 {
1166 CPU_SET_S(cpu, cpu_present_setsize, cpu_present_set);
1167 return 0;
1168 }
1170 static int __attribute__((warn_unused_result))
1171 allocate_cpu_set(cpu_set_t * set, size_t * size) {
1172 set = CPU_ALLOC(topology.max_cpu_id + 1);
1173 if (set == NULL) {
1174 ERROR("Unable to allocate CPU state");
1175 return -ERR_CPU_ALLOC;
1176 }
1177 *size = CPU_ALLOC_SIZE(topology.max_cpu_id + 1);
1178 CPU_ZERO_S(*size, set);
1179 return 0;
1180 }
1182 /*
1183 * Build a local representation of the cpu distribution
1184 */
1185 static int __attribute__((warn_unused_result))
1186 topology_probe()
1187 {
1188 int i;
1189 int ret;
1190 int max_package_id, max_core_id, max_thread_id;
1191 max_package_id = max_core_id = max_thread_id = 0;
1193 /* Clean topology */
1194 free(topology.cpus);
1195 memset(&topology, 0, sizeof(topology));
1197 /* Can't fail (update_max_cpu_id always returns 0) */
1198 assert(for_all_proc_cpus(update_max_cpu_id));
1200 topology.cpus = calloc(1, (topology.max_cpu_id + 1) * sizeof(struct cpu_topology));
1201 if (topology.cpus == NULL) {
1202 ERROR("Unable to allocate memory for cpu topology");
1203 return -ERR_CALLOC;
1204 }
1206 ret = allocate_cpu_set(cpu_present_set, &cpu_present_setsize);
1207 if (ret != 0)
1208 goto err;
1209 ret = allocate_cpu_set(cpu_affinity_set, &cpu_affinity_setsize);
1210 if (ret != 0)
1211 goto err;
1212 ret = allocate_cpu_set(cpu_saved_affinity_set, &cpu_saved_affinity_setsize);
1213 if (ret != 0)
1214 goto err;
1216 /* Can't fail (mark_cpu_present always returns 0) */
1217 assert(for_all_proc_cpus(mark_cpu_present));
1219 /*
1220 * For online cpus
1221 * find max_core_id, max_package_id
1222 */
1223 for (i = 0; i <= topology.max_cpu_id; ++i) {
1224 int num_threads;
1225 struct cpu_topology *cpu = &topology.cpus[i];
1227 if (cpu_is_not_present(i)) {
1228 WARNING("cpu%d NOT PRESENT", i);
1229 continue;
1230 }
1232 ret = parse_int_file("/sys/devices/system/cpu/cpu%d/topology/physical_package_id", i);
1233 if (ret < 0)
1234 goto err;
1235 else
1236 cpu->package_id = ret;
1237 if (cpu->package_id > max_package_id)
1238 max_package_id = cpu->package_id;
1240 ret = parse_int_file("/sys/devices/system/cpu/cpu%d/topology/core_id", i);
1241 if (ret < 0)
1242 goto err;
1243 else
1244 cpu->core_id = ret;
1245 if (cpu->core_id > max_core_id)
1246 max_core_id = cpu->core_id;
1247 ret = parse_int_file("/sys/devices/system/cpu/cpu%d/topology/core_siblings_list", i);
1248 if (ret < 0)
1249 goto err;
1250 else if (ret == cpu->core_id)
1251 cpu->first_core_in_package = 1;
1253 ret = get_threads_on_core(i);
1254 if (ret < 0)
1255 goto err;
1256 else
1257 num_threads = ret;
1258 if (num_threads > max_thread_id)
1259 max_thread_id = num_threads;
1260 if (num_threads > 1) {
1261 ret = parse_int_file("/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", i);
1262 if (ret < 0)
1263 goto err;
1264 else if (ret == num_threads)
1265 cpu->first_thread_in_core = 1;
1266 }
1267 DEBUG("cpu %d pkg %d core %d\n",
1268 i, cpu->package_id, cpu->core_id);
1269 }
1270 /* Num is max + 1 (need to count 0) */
1271 topology.num_packages = max_package_id + 1;
1272 topology.num_cores = max_core_id + 1;
1273 topology.num_threads = max_thread_id + 1;
1275 return 0;
1276 err:
1277 free(topology.cpus);
1278 return ret;
1279 }
1282 /************************
1283 * Main alloc/init/free *
1284 ************************/
1286 static int
1287 allocate_counters(struct thread_data **threads, struct core_data **cores, struct pkg_data **packages)
1288 {
1289 int i;
1290 int total_threads, total_cores;
1292 total_threads = topology.num_threads * topology.num_cores * topology.num_packages;
1293 *threads = calloc(total_threads, sizeof(struct thread_data));
1294 if (*threads == NULL)
1295 goto err;
1297 for (i = 0; i < total_threads; ++i)
1298 (*threads)[i].cpu_id = -1;
1300 total_cores = topology.num_cores * topology.num_packages;
1301 *cores = calloc(total_cores, sizeof(struct core_data));
1302 if (*cores == NULL)
1303 goto err_clean_threads;
1305 for (i = 0; i < total_cores; ++i)
1306 (*cores)[i].core_id = -1;
1308 *packages = calloc(topology.num_packages, sizeof(struct pkg_data));
1309 if (*packages == NULL)
1310 goto err_clean_cores;
1312 for (i = 0; i < topology.num_packages; i++)
1313 (*packages)[i].package_id = i;
1315 return 0;
1317 err_clean_cores:
1318 free(*cores);
1319 err_clean_threads:
1320 free(*threads);
1321 err:
1322 ERROR("calloc counters");
1323 return -ERR_CALLOC;
1324 }
1326 static int
1327 init_counter(struct thread_data *thread_base, struct core_data *core_base,
1328 struct pkg_data *pkg_base, int cpu_id)
1329 {
1330 struct thread_data *t;
1331 struct core_data *c;
1332 struct pkg_data *p;
1333 struct cpu_topology *cpu = &topology.cpus[cpu_id];
1335 t = GET_THREAD(thread_base, !(cpu->first_thread_in_core), cpu->core_id, cpu->package_id);
1336 c = GET_CORE(core_base, cpu->core_id, cpu->package_id);
1337 p = GET_PKG(pkg_base, cpu->package_id);
1339 t->cpu_id = cpu_id;
1340 if (cpu->first_thread_in_core)
1341 t->flags |= CPU_IS_FIRST_THREAD_IN_CORE;
1342 if (cpu->first_core_in_package)
1343 t->flags |= CPU_IS_FIRST_CORE_IN_PACKAGE;
1345 c->core_id = cpu->core_id;
1346 p->package_id = cpu->package_id;
1348 return 0;
1349 }
1351 static int
1352 initialize_counters(void)
1353 {
1354 int ret;
1355 int cpu_id;
1357 for (cpu_id = 0; cpu_id <= topology.max_cpu_id; ++cpu_id) {
1358 if (cpu_is_not_present(cpu_id)) {
1359 continue;
1360 }
1362 ret = init_counter(EVEN_COUNTERS, cpu_id);
1363 if (ret < 0)
1364 return ret;
1365 ret = init_counter(ODD_COUNTERS, cpu_id);
1366 if (ret < 0)
1367 return ret;
1368 ret = init_counter(DELTA_COUNTERS, cpu_id);
1369 if (ret < 0)
1370 return ret;
1371 }
1372 return 0;
1373 }
1377 static void
1378 free_all_buffers(void)
1379 {
1380 allocated = 0;
1381 initialized = 0;
1383 CPU_FREE(cpu_present_set);
1384 cpu_present_set = NULL;
1385 cpu_present_set = 0;
1387 CPU_FREE(cpu_affinity_set);
1388 cpu_affinity_set = NULL;
1389 cpu_affinity_setsize = 0;
1391 CPU_FREE(cpu_saved_affinity_set);
1392 cpu_saved_affinity_set = NULL;
1393 cpu_saved_affinity_setsize = 0;
1395 free(thread_even);
1396 free(core_even);
1397 free(package_even);
1399 thread_even = NULL;
1400 core_even = NULL;
1401 package_even = NULL;
1403 free(thread_odd);
1404 free(core_odd);
1405 free(package_odd);
1407 thread_odd = NULL;
1408 core_odd = NULL;
1409 package_odd = NULL;
1411 free(thread_delta);
1412 free(core_delta);
1413 free(package_delta);
1415 thread_delta = NULL;
1416 core_delta = NULL;
1417 package_delta = NULL;
1418 }
1421 /**********************
1422 * Collectd functions *
1423 **********************/
1425 #define DO_OR_GOTO_ERR(something) \
1426 do { \
1427 ret = (something); \
1428 if (ret < 0) \
1429 goto err; \
1430 } while (0)
1432 static int setup_all_buffers(void)
1433 {
1434 int ret;
1436 DO_OR_GOTO_ERR(topology_probe());
1437 DO_OR_GOTO_ERR(allocate_counters(&thread_even, &core_even, &package_even));
1438 DO_OR_GOTO_ERR(allocate_counters(&thread_odd, &core_odd, &package_odd));
1439 DO_OR_GOTO_ERR(allocate_counters(&thread_delta, &core_delta, &package_delta));
1440 DO_OR_GOTO_ERR(initialize_counters());
1441 DO_OR_GOTO_ERR(for_all_cpus(set_temperature_target, EVEN_COUNTERS));
1442 DO_OR_GOTO_ERR(for_all_cpus(set_temperature_target, ODD_COUNTERS));
1444 allocated = 1;
1445 return 0;
1446 err:
1447 free_all_buffers();
1448 return ret;
1449 }
1451 static int
1452 turbostat_read(user_data_t * not_used)
1453 {
1454 int ret;
1456 if (!allocated) {
1457 if ((ret = setup_all_buffers()) < 0)
1458 return ret;
1459 }
1461 if (for_all_proc_cpus(cpu_is_not_present)) {
1462 free_all_buffers();
1463 if ((ret = setup_all_buffers()) < 0)
1464 return ret;
1465 if (for_all_proc_cpus(cpu_is_not_present))
1466 return -ERR_CPU_NOT_PRESENT;
1467 }
1469 /* Saving the scheduling affinity, as it will be modified by get_counters */
1470 if (sched_getaffinity(0, cpu_saved_affinity_setsize, cpu_saved_affinity_set) != 0)
1471 return -ERR_CPU_SAVE_SCHED_AFFINITY;
1473 if (!initialized) {
1474 if ((ret = for_all_cpus(get_counters, EVEN_COUNTERS)) < 0)
1475 goto out;
1476 gettimeofday(&tv_even, (struct timezone *)NULL);
1477 is_even = 1;
1478 initialized = 1;
1479 ret = 0;
1480 goto out;
1481 }
1483 if (is_even) {
1484 if ((ret = for_all_cpus(get_counters, ODD_COUNTERS)) < 0)
1485 goto out;
1486 gettimeofday(&tv_odd, (struct timezone *)NULL);
1487 is_even = 0;
1488 timersub(&tv_odd, &tv_even, &tv_delta);
1489 if ((ret = for_all_cpus_delta(ODD_COUNTERS, EVEN_COUNTERS)) < 0)
1490 goto out;
1491 if ((ret = for_all_cpus(submit_counters, DELTA_COUNTERS)) < 0)
1492 goto out;
1493 } else {
1494 if ((ret = for_all_cpus(get_counters, EVEN_COUNTERS)) < 0)
1495 goto out;
1496 gettimeofday(&tv_even, (struct timezone *)NULL);
1497 is_even = 1;
1498 timersub(&tv_even, &tv_odd, &tv_delta);
1499 if ((ret = for_all_cpus_delta(EVEN_COUNTERS, ODD_COUNTERS)) < 0)
1500 goto out;
1501 if ((ret = for_all_cpus(submit_counters, DELTA_COUNTERS)) < 0)
1502 goto out;
1503 }
1504 ret = 0;
1505 out:
1506 /*
1507 * Let's restore the affinity
1508 * This might fail if the number of CPU changed, but we can't do anything in that case..
1509 */
1510 (void)sched_setaffinity(0, cpu_saved_affinity_setsize, cpu_saved_affinity_set);
1511 return ret;
1512 }
1514 static int
1515 turbostat_init(void)
1516 {
1517 struct stat sb;
1518 int ret;
1520 if (getuid() != 0) {
1521 ERROR("must be root");
1522 return -ERR_NOT_ROOT;
1523 }
1525 DO_OR_GOTO_ERR(probe_cpu());
1527 if (stat("/dev/cpu/0/msr", &sb)) {
1528 ERROR("no /dev/cpu/0/msr, try \"# modprobe msr\"");
1529 return -ERR_NO_MSR;
1530 }
1532 DO_OR_GOTO_ERR(setup_all_buffers());
1534 plugin_register_complex_read(NULL, PLUGIN_NAME, turbostat_read, NULL, NULL);
1536 return 0;
1537 err:
1538 free_all_buffers();
1539 return ret;
1540 }
1542 static const char *config_keys[] =
1543 {
1544 "TCCActivationTemp",
1545 };
1546 static const int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
1548 static int
1549 turbostat_config(const char *key, const char *value)
1550 {
1551 long unsigned int tmp_val;
1552 char *end;
1554 if (strcasecmp("TCCActivationTemp", key) == 0) {
1555 tmp_val = strtoul(value, &end, 0);
1556 if (*end != '\0' || tmp_val > UINT_MAX)
1557 return -1;
1558 tcc_activation_temp = (unsigned int) tmp_val;
1559 } else {
1560 return -1;
1561 }
1562 return 0;
1563 }
1565 void module_register(void);
1566 void module_register(void)
1567 {
1568 plugin_register_init(PLUGIN_NAME, turbostat_init);
1569 plugin_register_config(PLUGIN_NAME, turbostat_config, config_keys, config_keys_num);
1570 }