cc0be207087b389979d9dd6e69bf4179792a4753
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("Turbostat plugin: 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("Turbostat plugin: MSR offset 0x%llx read failed",
317 (unsigned long long)offset);
318 return -1;
319 }
320 return 0;
321 }
323 /*
324 * Open a MSR device for reading, read the value asked for and close it.
325 * This call will not affect the scheduling affinity of this thread.
326 */
327 static int __attribute__((warn_unused_result))
328 get_msr(int cpu, off_t offset, unsigned long long *msr)
329 {
330 ssize_t retval;
331 int fd;
333 fd = open_msr(cpu, 0);
334 if (fd < 0)
335 return fd;
336 retval = read_msr(fd, offset, msr);
337 close(fd);
338 return retval;
339 }
342 /********************************
343 * Raw data acquisition (1 CPU) *
344 ********************************/
346 /*
347 * Read every data avalaible for a single CPU
348 *
349 * Core data is shared for all threads in one core: extracted only for the first thread
350 * Package data is shared for all core in one package: extracted only for the first thread of the first core
351 *
352 * Side effect: migrates to the targeted CPU
353 */
354 static int __attribute__((warn_unused_result))
355 get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
356 {
357 int cpu = t->cpu_id;
358 unsigned long long msr;
359 int msr_fd;
360 int retval = 0;
362 msr_fd = open_msr(cpu, 1);
363 if (msr_fd < 0)
364 return msr_fd;
366 #define READ_MSR(msr, dst) \
367 do { \
368 if (read_msr(msr_fd, msr, dst)) { \
369 retval = -ERR_##msr; \
370 goto out; \
371 } \
372 } while (0)
374 READ_MSR(MSR_IA32_TSC, &t->tsc);
376 READ_MSR(MSR_IA32_APERF, &t->aperf);
377 READ_MSR(MSR_IA32_MPERF, &t->mperf);
379 READ_MSR(MSR_SMI_COUNT, &msr);
380 t->smi_count = msr & 0xFFFFFFFF;
382 /* collect core counters only for 1st thread in core */
383 if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE)) {
384 retval = 0;
385 goto out;
386 }
388 if (do_core_cstate & (1 << 3))
389 READ_MSR(MSR_CORE_C3_RESIDENCY, &c->c3);
390 if (do_core_cstate & (1 << 6))
391 READ_MSR(MSR_CORE_C6_RESIDENCY, &c->c6);
392 if (do_core_cstate & (1 << 7))
393 READ_MSR(MSR_CORE_C7_RESIDENCY, &c->c7);
395 if (do_dts) {
396 READ_MSR(MSR_IA32_THERM_STATUS, &msr);
397 c->core_temp_c = p->tcc_activation_temp - ((msr >> 16) & 0x7F);
398 }
400 /* collect package counters only for 1st core in package */
401 if (!(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE)) {
402 retval = 0;
403 goto out;
404 }
406 if (do_pkg_cstate & (1 << 2))
407 READ_MSR(MSR_PKG_C2_RESIDENCY, &p->pc2);
408 if (do_pkg_cstate & (1 << 3))
409 READ_MSR(MSR_PKG_C3_RESIDENCY, &p->pc3);
410 if (do_pkg_cstate & (1 << 6))
411 READ_MSR(MSR_PKG_C6_RESIDENCY, &p->pc6);
412 if (do_pkg_cstate & (1 << 7))
413 READ_MSR(MSR_PKG_C7_RESIDENCY, &p->pc7);
414 if (do_pkg_cstate & (1 << 8))
415 READ_MSR(MSR_PKG_C8_RESIDENCY, &p->pc8);
416 if (do_pkg_cstate & (1 << 9))
417 READ_MSR(MSR_PKG_C9_RESIDENCY, &p->pc9);
418 if (do_pkg_cstate & (1 << 10))
419 READ_MSR(MSR_PKG_C10_RESIDENCY, &p->pc10);
421 if (do_rapl & RAPL_PKG) {
422 READ_MSR(MSR_PKG_ENERGY_STATUS, &msr);
423 p->energy_pkg = msr & 0xFFFFFFFF;
424 }
425 if (do_rapl & RAPL_CORES) {
426 READ_MSR(MSR_PP0_ENERGY_STATUS, &msr);
427 p->energy_cores = msr & 0xFFFFFFFF;
428 }
429 if (do_rapl & RAPL_DRAM) {
430 READ_MSR(MSR_DRAM_ENERGY_STATUS, &msr);
431 p->energy_dram = msr & 0xFFFFFFFF;
432 }
433 if (do_rapl & RAPL_GFX) {
434 READ_MSR(MSR_PP1_ENERGY_STATUS, &msr);
435 p->energy_gfx = msr & 0xFFFFFFFF;
436 }
437 if (do_rapl & RAPL_PKG_PERF_STATUS) {
438 READ_MSR(MSR_PKG_PERF_STATUS, &msr);
439 p->rapl_pkg_perf_status = msr & 0xFFFFFFFF;
440 }
441 if (do_rapl & RAPL_DRAM_PERF_STATUS) {
442 READ_MSR(MSR_DRAM_PERF_STATUS, &msr);
443 p->rapl_dram_perf_status = msr & 0xFFFFFFFF;
444 }
445 if (do_ptm) {
446 READ_MSR(MSR_IA32_PACKAGE_THERM_STATUS, &msr);
447 p->pkg_temp_c = p->tcc_activation_temp - ((msr >> 16) & 0x7F);
448 }
450 out:
451 close(msr_fd);
452 return retval;
453 }
456 /**********************************
457 * Evaluating the changes (1 CPU) *
458 **********************************/
460 /*
461 * Do delta = new - old on 32bits cyclique intergers
462 */
463 #define DELTA_WRAP32(delta, new, old) \
464 if (new > old) { \
465 delta = new - old; \
466 } else { \
467 delta = 0x100000000 + new - old; \
468 }
470 /*
471 * Extract the evolution old->new in delta at a package level
472 * (some are not new-delta, e.g. temperature)
473 */
474 static inline void
475 delta_package(struct pkg_data *delta, const struct pkg_data *new, const struct pkg_data *old)
476 {
477 delta->pc2 = new->pc2 - old->pc2;
478 delta->pc3 = new->pc3 - old->pc3;
479 delta->pc6 = new->pc6 - old->pc6;
480 delta->pc7 = new->pc7 - old->pc7;
481 delta->pc8 = new->pc8 - old->pc8;
482 delta->pc9 = new->pc9 - old->pc9;
483 delta->pc10 = new->pc10 - old->pc10;
484 delta->pkg_temp_c = new->pkg_temp_c;
486 DELTA_WRAP32(delta->energy_pkg, new->energy_pkg, old->energy_pkg);
487 DELTA_WRAP32(delta->energy_cores, new->energy_cores, old->energy_cores);
488 DELTA_WRAP32(delta->energy_gfx, new->energy_gfx, old->energy_gfx);
489 DELTA_WRAP32(delta->energy_dram, new->energy_dram, old->energy_dram);
490 DELTA_WRAP32(delta->rapl_pkg_perf_status, new->rapl_pkg_perf_status, old->rapl_pkg_perf_status);
491 DELTA_WRAP32(delta->rapl_dram_perf_status, new->rapl_dram_perf_status, old->rapl_dram_perf_status);
492 }
494 /*
495 * Extract the evolution old->new in delta at a core level
496 * (some are not new-delta, e.g. temperature)
497 */
498 static inline void
499 delta_core(struct core_data *delta, const struct core_data *new, const struct core_data *old)
500 {
501 delta->c3 = new->c3 - old->c3;
502 delta->c6 = new->c6 - old->c6;
503 delta->c7 = new->c7 - old->c7;
504 delta->core_temp_c = new->core_temp_c;
505 }
507 /*
508 * Extract the evolution old->new in delta at a package level
509 * core_delta is required for c1 estimation (tsc - c0 - all core cstates)
510 */
511 static inline int __attribute__((warn_unused_result))
512 delta_thread(struct thread_data *delta, const struct thread_data *new, const struct thread_data *old,
513 const struct core_data *core_delta)
514 {
515 delta->tsc = new->tsc - old->tsc;
517 /* check for TSC < 1 Mcycles over interval */
518 if (delta->tsc < (1000 * 1000)) {
519 WARNING("Turbostat plugin: Insanely slow TSC rate, TSC stops "
520 "in idle? You can disable all c-states by booting with"
521 " 'idle=poll' or just the deep ones with"
522 " 'processor.max_cstate=1'");
523 return -1;
524 }
526 delta->c1 = new->c1 - old->c1;
528 if ((new->aperf > old->aperf) && (new->mperf > old->mperf)) {
529 delta->aperf = new->aperf - old->aperf;
530 delta->mperf = new->mperf - old->mperf;
531 } else {
532 if (!aperf_mperf_unstable) {
533 WARNING("Turbostat plugin: APERF or MPERF went "
534 "backwards. Frequency results do not cover "
535 "the entire interval. Fix this by running "
536 "Linux-2.6.30 or later.");
538 aperf_mperf_unstable = 1;
539 }
540 }
542 /*
543 * As counter collection is not atomic,
544 * it is possible for mperf's non-halted cycles + idle states
545 * to exceed TSC's all cycles: show c1 = 0% in that case.
546 */
547 if ((delta->mperf + core_delta->c3 + core_delta->c6 + core_delta->c7) > delta->tsc)
548 delta->c1 = 0;
549 else {
550 /* normal case, derive c1 */
551 delta->c1 = delta->tsc - delta->mperf - core_delta->c3
552 - core_delta->c6 - core_delta->c7;
553 }
555 if (delta->mperf == 0) {
556 WARNING("Turbostat plugin: cpu%d MPERF 0!", old->cpu_id);
557 delta->mperf = 1; /* divide by 0 protection */
558 }
560 delta->smi_count = new->smi_count - old->smi_count;
562 return 0;
563 }
565 /**********************************
566 * Submitting the results (1 CPU) *
567 **********************************/
569 /*
570 * Submit one gauge value
571 */
572 static void
573 turbostat_submit (const char *plugin_instance,
574 const char *type, const char *type_instance,
575 gauge_t value)
576 {
577 value_list_t vl = VALUE_LIST_INIT;
578 value_t v;
580 v.gauge = value;
581 vl.values = &v;
582 vl.values_len = 1;
583 sstrncpy (vl.host, hostname_g, sizeof (vl.host));
584 sstrncpy (vl.plugin, PLUGIN_NAME, sizeof (vl.plugin));
585 if (plugin_instance != NULL)
586 sstrncpy (vl.plugin_instance, plugin_instance, sizeof (vl.plugin_instance));
587 sstrncpy (vl.type, type, sizeof (vl.type));
588 if (type_instance != NULL)
589 sstrncpy (vl.type_instance, type_instance, sizeof (vl.type_instance));
591 plugin_dispatch_values (&vl);
592 }
594 /*
595 * Submit every data for a single CPU
596 *
597 * Core data is shared for all threads in one core: submitted only for the first thread
598 * Package data is shared for all core in one package: submitted only for the first thread of the first core
599 */
600 static int
601 submit_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
602 {
603 char name[12];
604 double interval_float;
606 interval_float = tv_delta.tv_sec + tv_delta.tv_usec/1000000.0;
608 ssnprintf(name, sizeof(name), "cpu%02d", t->cpu_id);
610 if (!aperf_mperf_unstable)
611 turbostat_submit(name, "percent", "c0", 100.0 * t->mperf/t->tsc);
612 if (!aperf_mperf_unstable)
613 turbostat_submit(name, "percent", "c1", 100.0 * t->c1/t->tsc);
615 /* GHz */
616 if ((!aperf_mperf_unstable) || (!(t->aperf > t->tsc || t->mperf > t->tsc)))
617 turbostat_submit(NULL, "frequency", name, 1.0 * t->tsc / 1000000000 * t->aperf / t->mperf / interval_float);
619 /* SMI */
620 turbostat_submit(NULL, "current", name, t->smi_count);
622 /* submit per-core data only for 1st thread in core */
623 if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE))
624 goto done;
626 ssnprintf(name, sizeof(name), "core%02d", c->core_id);
628 if (do_core_cstate & (1 << 3))
629 turbostat_submit(name, "percent", "c3", 100.0 * c->c3/t->tsc);
630 if (do_core_cstate & (1 << 6))
631 turbostat_submit(name, "percent", "c6", 100.0 * c->c6/t->tsc);
632 if (do_core_cstate & (1 << 7))
633 turbostat_submit(name, "percent", "c7", 100.0 * c->c7/t->tsc);
635 if (do_dts)
636 turbostat_submit(NULL, "temperature", name, c->core_temp_c);
638 /* submit per-package data only for 1st core in package */
639 if (!(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
640 goto done;
642 ssnprintf(name, sizeof(name), "pkg%02d", p->package_id);
644 if (do_ptm)
645 turbostat_submit(NULL, "temperature", name, p->pkg_temp_c);
647 if (do_pkg_cstate & (1 << 2))
648 turbostat_submit(name, "percent", "pc2", 100.0 * p->pc2/t->tsc);
649 if (do_pkg_cstate & (1 << 3))
650 turbostat_submit(name, "percent", "pc3", 100.0 * p->pc3/t->tsc);
651 if (do_pkg_cstate & (1 << 6))
652 turbostat_submit(name, "percent", "pc6", 100.0 * p->pc6/t->tsc);
653 if (do_pkg_cstate & (1 << 7))
654 turbostat_submit(name, "percent", "pc7", 100.0 * p->pc7/t->tsc);
655 if (do_pkg_cstate & (1 << 8))
656 turbostat_submit(name, "percent", "pc8", 100.0 * p->pc8/t->tsc);
657 if (do_pkg_cstate & (1 << 9))
658 turbostat_submit(name, "percent", "pc9", 100.0 * p->pc9/t->tsc);
659 if (do_pkg_cstate & (1 << 10))
660 turbostat_submit(name, "percent", "pc10", 100.0 * p->pc10/t->tsc);
662 if (do_rapl) {
663 if (do_rapl & RAPL_PKG)
664 turbostat_submit(name, "power", "Pkg_W", p->energy_pkg * rapl_energy_units / interval_float);
665 if (do_rapl & RAPL_CORES)
666 turbostat_submit(name, "power", "Cor_W", p->energy_cores * rapl_energy_units / interval_float);
667 if (do_rapl & RAPL_GFX)
668 turbostat_submit(name, "power", "GFX_W", p->energy_gfx * rapl_energy_units / interval_float);
669 if (do_rapl & RAPL_DRAM)
670 turbostat_submit(name, "power", "RAM_W", p->energy_dram * rapl_energy_units / interval_float);
671 }
672 done:
673 return 0;
674 }
677 /**********************************
678 * Looping function over all CPUs *
679 **********************************/
681 /*
682 * Check if a given cpu id is in our compiled list of existing CPUs
683 */
684 static int
685 cpu_is_not_present(int cpu)
686 {
687 return !CPU_ISSET_S(cpu, cpu_present_setsize, cpu_present_set);
688 }
690 /*
691 * Loop on all CPUs in topological order
692 *
693 * Skip non-present cpus
694 * Return the error code at the first error or 0
695 */
696 static int __attribute__((warn_unused_result))
697 for_all_cpus(int (func)(struct thread_data *, struct core_data *, struct pkg_data *),
698 struct thread_data *thread_base, struct core_data *core_base, struct pkg_data *pkg_base)
699 {
700 int retval, pkg_no, core_no, thread_no;
702 for (pkg_no = 0; pkg_no < topology.num_packages; ++pkg_no) {
703 for (core_no = 0; core_no < topology.num_cores; ++core_no) {
704 for (thread_no = 0; thread_no < topology.num_threads; ++thread_no) {
705 struct thread_data *t;
706 struct core_data *c;
707 struct pkg_data *p;
709 t = GET_THREAD(thread_base, thread_no, core_no, pkg_no);
711 if (cpu_is_not_present(t->cpu_id))
712 continue;
714 c = GET_CORE(core_base, core_no, pkg_no);
715 p = GET_PKG(pkg_base, pkg_no);
717 retval = func(t, c, p);
718 if (retval)
719 return retval;
720 }
721 }
722 }
723 return 0;
724 }
726 /*
727 * Dedicated loop: Extract every data evolution for all CPU
728 *
729 * Skip non-present cpus
730 * Return the error code at the first error or 0
731 *
732 * Core data is shared for all threads in one core: extracted only for the first thread
733 * Package data is shared for all core in one package: extracted only for the first thread of the first core
734 */
735 static int __attribute__((warn_unused_result))
736 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,
737 const struct thread_data *thread_old_base, const struct core_data *core_old_base, const struct pkg_data *pkg_old_base)
738 {
739 int retval, pkg_no, core_no, thread_no;
741 for (pkg_no = 0; pkg_no < topology.num_packages; ++pkg_no) {
742 for (core_no = 0; core_no < topology.num_cores; ++core_no) {
743 for (thread_no = 0; thread_no < topology.num_threads; ++thread_no) {
744 struct thread_data *t_delta;
745 const struct thread_data *t_old, *t_new;
746 struct core_data *c_delta;
748 /* Get correct pointers for threads */
749 t_delta = GET_THREAD(thread_delta, thread_no, core_no, pkg_no);
750 t_new = GET_THREAD(thread_new_base, thread_no, core_no, pkg_no);
751 t_old = GET_THREAD(thread_old_base, thread_no, core_no, pkg_no);
753 /* Skip threads that disappeared */
754 if (cpu_is_not_present(t_delta->cpu_id))
755 continue;
757 /* c_delta is always required for delta_thread */
758 c_delta = GET_CORE(core_delta, core_no, pkg_no);
760 /* calculate core delta only for 1st thread in core */
761 if (t_new->flags & CPU_IS_FIRST_THREAD_IN_CORE) {
762 const struct core_data *c_old, *c_new;
764 c_new = GET_CORE(core_new_base, core_no, pkg_no);
765 c_old = GET_CORE(core_old_base, core_no, pkg_no);
767 delta_core(c_delta, c_new, c_old);
768 }
770 /* Always calculate thread delta */
771 retval = delta_thread(t_delta, t_new, t_old, c_delta);
772 if (retval)
773 return retval;
775 /* calculate package delta only for 1st core in package */
776 if (t_new->flags & CPU_IS_FIRST_CORE_IN_PACKAGE) {
777 struct pkg_data *p_delta;
778 const struct pkg_data *p_old, *p_new;
780 p_delta = GET_PKG(package_delta, pkg_no);
781 p_new = GET_PKG(pkg_new_base, pkg_no);
782 p_old = GET_PKG(pkg_old_base, pkg_no);
784 delta_package(p_delta, p_new, p_old);
785 }
786 }
787 }
788 }
789 return 0;
790 }
793 /***************
794 * CPU Probing *
795 ***************/
797 /*
798 * MSR_IA32_TEMPERATURE_TARGET indicates the temperature where
799 * the Thermal Control Circuit (TCC) activates.
800 * This is usually equal to tjMax.
801 *
802 * Older processors do not have this MSR, so there we guess,
803 * but also allow conficuration over-ride with "TCCActivationTemp".
804 *
805 * Several MSR temperature values are in units of degrees-C
806 * below this value, including the Digital Thermal Sensor (DTS),
807 * Package Thermal Management Sensor (PTM), and thermal event thresholds.
808 */
809 static int __attribute__((warn_unused_result))
810 set_temperature_target(struct thread_data *t, struct core_data *c, struct pkg_data *p)
811 {
812 unsigned long long msr;
813 unsigned int target_c_local;
815 /* tcc_activation_temp is used only for dts or ptm */
816 if (!(do_dts || do_ptm))
817 return 0;
819 /* this is a per-package concept */
820 if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE) || !(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
821 return 0;
823 if (tcc_activation_temp != 0) {
824 p->tcc_activation_temp = tcc_activation_temp;
825 return 0;
826 }
828 if (get_msr(t->cpu_id, MSR_IA32_TEMPERATURE_TARGET, &msr))
829 goto guess;
831 target_c_local = (msr >> 16) & 0xFF;
833 if (!target_c_local)
834 goto guess;
836 p->tcc_activation_temp = target_c_local;
838 return 0;
840 guess:
841 p->tcc_activation_temp = TJMAX_DEFAULT;
842 WARNING("Turbostat plugin: cpu%d: Guessing tjMax %d C,"
843 " Please use TCCActivationTemp to specify it.",
844 t->cpu_id, p->tcc_activation_temp);
846 return 0;
847 }
849 /*
850 * Identify the functionality of the CPU
851 */
852 static int __attribute__((warn_unused_result))
853 probe_cpu()
854 {
855 unsigned int eax, ebx, ecx, edx, max_level;
856 unsigned int fms, family, model;
858 /* CPUID(0):
859 * - EAX: Maximum Input Value for Basic CPUID Information
860 * - EBX: "Genu" (0x756e6547)
861 * - EDX: "ineI" (0x49656e69)
862 * - ECX: "ntel" (0x6c65746e)
863 */
864 max_level = ebx = ecx = edx = 0;
865 __get_cpuid(0, &max_level, &ebx, &ecx, &edx);
866 if (ebx != 0x756e6547 && edx != 0x49656e69 && ecx != 0x6c65746e) {
867 ERROR("Turbostat plugin: Unsupported CPU (not Intel)");
868 return -UNSUPPORTED_CPU;
869 }
871 /* CPUID(1):
872 * - EAX: Version Information: Type, Family, Model, and Stepping ID
873 * + 4-7: Model ID
874 * + 8-11: Family ID
875 * + 12-13: Processor type
876 * + 16-19: Extended Model ID
877 * + 20-27: Extended Family ID
878 * - EDX: Feature Information:
879 * + 5: Support for MSR read/write operations
880 */
881 fms = ebx = ecx = edx = 0;
882 __get_cpuid(1, &fms, &ebx, &ecx, &edx);
883 family = (fms >> 8) & 0xf;
884 model = (fms >> 4) & 0xf;
885 if (family == 0xf)
886 family += (fms >> 20) & 0xf;
887 if (family == 6 || family == 0xf)
888 model += ((fms >> 16) & 0xf) << 4;
889 if (!(edx & (1 << 5))) {
890 ERROR("Turbostat plugin: Unsupported CPU (no MSR support)");
891 return -ERR_NO_MSR;
892 }
894 /*
895 * CPUID(0x80000000):
896 * - EAX: Maximum Input Value for Extended Function CPUID Information
897 *
898 * This allows us to verify if the CPUID(0x80000007) can be called
899 *
900 * This check is valid for both Intel and AMD.
901 */
902 max_level = ebx = ecx = edx = 0;
903 __get_cpuid(0x80000000, &max_level, &ebx, &ecx, &edx);
904 if (max_level < 0x80000007) {
905 ERROR("Turbostat plugin: Unsupported CPU (no invariant TSC, "
906 " Maximum Extended Function: 0x%x)", max_level);
907 return -ERR_NO_INVARIANT_TSC;
908 }
910 /*
911 * CPUID(0x80000007):
912 * - EDX:
913 * + 8: Invariant TSC available if set
914 *
915 * This check is valid for both Intel and AMD
916 */
917 eax = ebx = ecx = edx = 0;
918 __get_cpuid(0x80000007, &eax, &ebx, &ecx, &edx);
919 if (!(edx & (1 << 8))) {
920 ERROR("Turbostat plugin: Unsupported CPU (No invariant TSC)");
921 return -ERR_NO_INVARIANT_TSC;
922 }
924 /*
925 * CPUID(6):
926 * - EAX:
927 * + 0: Digital temperature sensor is supported if set
928 * + 6: Package thermal management is supported if set
929 * - ECX:
930 * + 0: Hardware Coordination Feedback Capability (Presence of IA32_MPERF and IA32_APERF).
931 * + 3: The processor supports performance-energy bias preference if set.
932 * It also implies the presence of a new architectural MSR called IA32_ENERGY_PERF_BIAS
933 *
934 * This check is valid for both Intel and AMD
935 */
936 eax = ebx = ecx = edx = 0;
937 __get_cpuid(0x6, &eax, &ebx, &ecx, &edx);
938 do_dts = eax & (1 << 0);
939 do_ptm = eax & (1 << 6);
940 if (!(ecx & (1 << 0))) {
941 ERROR("Turbostat plugin: Unsupported CPU (No APERF)");
942 return -ERR_NO_APERF;
943 }
945 /*
946 * Enable or disable C states depending on the model and family
947 */
948 if (family == 6) {
949 switch (model) {
950 /* Atom (partial) */
951 case 0x27:
952 do_core_cstate = 0;
953 do_pkg_cstate = (1 << 2) | (1 << 4) | (1 << 6);
954 break;
955 /* Silvermont */
956 case 0x37: /* BYT */
957 case 0x4A:
958 case 0x4D: /* AVN */
959 case 0x5A:
960 case 0x5D:
961 do_core_cstate = (1 << 1) | (1 << 6);
962 do_pkg_cstate = (1 << 6);
963 break;
964 /* Nehalem */
965 case 0x1A: /* Core i7, Xeon 5500 series - Bloomfield, Gainstown NHM-EP */
966 case 0x1E: /* Core i7 and i5 Processor - Clarksfield, Lynnfield, Jasper Forest */
967 case 0x1F: /* Core i7 and i5 Processor - Nehalem */
968 case 0x2E: /* Nehalem-EX Xeon - Beckton */
969 do_core_cstate = (1 << 3) | (1 << 6);
970 do_pkg_cstate = (1 << 3) | (1 << 6) | (1 << 7);
971 break;
972 /* Westmere */
973 case 0x25: /* Westmere Client - Clarkdale, Arrandale */
974 case 0x2C: /* Westmere EP - Gulftown */
975 case 0x2F: /* Westmere-EX Xeon - Eagleton */
976 do_core_cstate = (1 << 3) | (1 << 6);
977 do_pkg_cstate = (1 << 3) | (1 << 6) | (1 << 7);
978 break;
979 /* Sandy Bridge */
980 case 0x2A: /* SNB */
981 case 0x2D: /* SNB Xeon */
982 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
983 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
984 break;
985 /* Ivy Bridge */
986 case 0x3A: /* IVB */
987 case 0x3E: /* IVB Xeon */
988 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
989 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
990 break;
991 /* Haswell Bridge */
992 case 0x3C: /* HSW */
993 case 0x3F: /* HSW */
994 case 0x46: /* HSW */
995 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
996 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
997 break;
998 case 0x45: /* HSW */
999 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
1000 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7) | (1 << 8) | (1 << 9) | (1 << 10);
1001 break;
1002 /* Broadwel */
1003 case 0x4F: /* BDW */
1004 case 0x56: /* BDX-DE */
1005 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
1006 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
1007 break;
1008 case 0x3D: /* BDW */
1009 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
1010 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7) | (1 << 8) | (1 << 9) | (1 << 10);
1011 break;
1012 default:
1013 ERROR("Turbostat plugin: Unsupported CPU (family: %#x,"
1014 " model: %#x)", family, model);
1015 }
1016 switch (model) {
1017 case 0x2A:
1018 case 0x3A:
1019 case 0x3C:
1020 case 0x45:
1021 case 0x46:
1022 do_rapl = RAPL_PKG | RAPL_CORES | RAPL_CORE_POLICY | RAPL_PKG_POWER_INFO | RAPL_GFX;
1023 break;
1024 case 0x3F:
1025 do_rapl = RAPL_PKG | RAPL_PKG_POWER_INFO | RAPL_PKG_PERF_STATUS | RAPL_DRAM | RAPL_DRAM_PERF_STATUS;
1026 break;
1027 case 0x2D:
1028 case 0x3E:
1029 do_rapl = RAPL_PKG | RAPL_CORES | RAPL_CORE_POLICY | RAPL_PKG_POWER_INFO | RAPL_PKG_PERF_STATUS | RAPL_DRAM | RAPL_DRAM_PERF_STATUS;
1030 break;
1031 case 0x37:
1032 case 0x4D:
1033 do_rapl = RAPL_PKG | RAPL_CORES;
1034 break;
1035 default:
1036 do_rapl = 0;
1037 }
1038 } else {
1039 ERROR("Turbostat plugin: Unsupported CPU (family: %#x, "
1040 "model: %#x)", family, model);
1041 return -UNSUPPORTED_CPU;
1042 }
1044 if (do_rapl) {
1045 unsigned long long msr;
1046 if (get_msr(0, MSR_RAPL_POWER_UNIT, &msr))
1047 return 0;
1049 if (model == 0x37)
1050 rapl_energy_units = 1.0 * (1 << (msr >> 8 & 0x1F)) / 1000000;
1051 else
1052 rapl_energy_units = 1.0 / (1 << (msr >> 8 & 0x1F));
1053 }
1055 return 0;
1056 }
1059 /********************
1060 * Topology Probing *
1061 ********************/
1063 /*
1064 * Read a single int from a file.
1065 */
1066 static int __attribute__ ((format(printf,1,2)))
1067 parse_int_file(const char *fmt, ...)
1068 {
1069 va_list args;
1070 char path[PATH_MAX];
1071 FILE *filep;
1072 int value;
1074 va_start(args, fmt);
1075 vsnprintf(path, sizeof(path), fmt, args);
1076 va_end(args);
1077 filep = fopen(path, "r");
1078 if (!filep) {
1079 ERROR("Turbostat plugin: Failed to open '%s'", path);
1080 return -ERR_CANT_OPEN_FILE;
1081 }
1082 if (fscanf(filep, "%d", &value) != 1) {
1083 ERROR("Turbostat plugin: Failed to parse number from '%s'", path);
1084 return -ERR_CANT_READ_NUMBER;
1085 }
1086 fclose(filep);
1087 return value;
1088 }
1090 static int
1091 get_threads_on_core(int cpu)
1092 {
1093 char path[80];
1094 FILE *filep;
1095 int sib1, sib2;
1096 int matches;
1097 char character;
1099 ssnprintf(path, sizeof(path), "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", cpu);
1100 filep = fopen(path, "r");
1101 if (!filep) {
1102 ERROR("Turbostat plugin: Failed to open '%s'", path);
1103 return -ERR_CANT_OPEN_FILE;
1104 }
1105 /*
1106 * file format:
1107 * if a pair of number with a character between: 2 siblings (eg. 1-2, or 1,4)
1108 * otherwinse 1 sibling (self).
1109 */
1110 matches = fscanf(filep, "%d%c%d\n", &sib1, &character, &sib2);
1112 fclose(filep);
1114 if (matches == 3)
1115 return 2;
1116 else
1117 return 1;
1118 }
1120 /*
1121 * run func(cpu) on every cpu in /proc/stat
1122 * return max_cpu number
1123 */
1124 static int __attribute__((warn_unused_result))
1125 for_all_proc_cpus(int (func)(int))
1126 {
1127 FILE *fp;
1128 int cpu_num;
1129 int retval;
1131 fp = fopen("/proc/stat", "r");
1132 if (!fp) {
1133 ERROR("Turbostat plugin: Failed to open /proc/stat");
1134 return -ERR_CANT_OPEN_FILE;
1135 }
1137 retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n");
1138 if (retval != 0) {
1139 ERROR("Turbostat plugin: Failed to parse /proc/stat");
1140 fclose(fp);
1141 return -ERR_CANT_READ_PROC_STAT;
1142 }
1144 while (1) {
1145 retval = fscanf(fp, "cpu%u %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n", &cpu_num);
1146 if (retval != 1)
1147 break;
1149 retval = func(cpu_num);
1150 if (retval) {
1151 fclose(fp);
1152 return(retval);
1153 }
1154 }
1155 fclose(fp);
1156 return 0;
1157 }
1159 /*
1160 * Update the stored topology.max_cpu_id
1161 */
1162 static int
1163 update_max_cpu_id(int cpu)
1164 {
1165 if (topology.max_cpu_id < cpu)
1166 topology.max_cpu_id = cpu;
1167 return 0;
1168 }
1170 static int
1171 mark_cpu_present(int cpu)
1172 {
1173 CPU_SET_S(cpu, cpu_present_setsize, cpu_present_set);
1174 return 0;
1175 }
1177 static int __attribute__((warn_unused_result))
1178 allocate_cpu_set(cpu_set_t ** set, size_t * size) {
1179 *set = CPU_ALLOC(topology.max_cpu_id + 1);
1180 if (*set == NULL) {
1181 ERROR("Turbostat plugin: Unable to allocate CPU state");
1182 return -ERR_CPU_ALLOC;
1183 }
1184 *size = CPU_ALLOC_SIZE(topology.max_cpu_id + 1);
1185 CPU_ZERO_S(*size, *set);
1186 return 0;
1187 }
1189 /*
1190 * Build a local representation of the cpu distribution
1191 */
1192 static int __attribute__((warn_unused_result))
1193 topology_probe()
1194 {
1195 int i;
1196 int ret;
1197 int max_package_id, max_core_id, max_thread_id;
1198 max_package_id = max_core_id = max_thread_id = 0;
1200 /* Clean topology */
1201 free(topology.cpus);
1202 memset(&topology, 0, sizeof(topology));
1204 ret = for_all_proc_cpus(update_max_cpu_id);
1205 if (ret != 0)
1206 goto err;
1208 topology.cpus = calloc(1, (topology.max_cpu_id + 1) * sizeof(struct cpu_topology));
1209 if (topology.cpus == NULL) {
1210 ERROR("Turbostat plugin: Unable to allocate memory for CPU topology");
1211 return -ERR_CALLOC;
1212 }
1214 ret = allocate_cpu_set(&cpu_present_set, &cpu_present_setsize);
1215 if (ret != 0)
1216 goto err;
1217 ret = allocate_cpu_set(&cpu_affinity_set, &cpu_affinity_setsize);
1218 if (ret != 0)
1219 goto err;
1220 ret = allocate_cpu_set(&cpu_saved_affinity_set, &cpu_saved_affinity_setsize);
1221 if (ret != 0)
1222 goto err;
1224 ret = for_all_proc_cpus(mark_cpu_present);
1225 if (ret != 0)
1226 goto err;
1228 /*
1229 * For online cpus
1230 * find max_core_id, max_package_id
1231 */
1232 for (i = 0; i <= topology.max_cpu_id; ++i) {
1233 int num_threads;
1234 struct cpu_topology *cpu = &topology.cpus[i];
1236 if (cpu_is_not_present(i)) {
1237 WARNING("Turbostat plugin: cpu%d NOT PRESENT", i);
1238 continue;
1239 }
1241 ret = parse_int_file("/sys/devices/system/cpu/cpu%d/topology/physical_package_id", i);
1242 if (ret < 0)
1243 goto err;
1244 else
1245 cpu->package_id = ret;
1246 if (cpu->package_id > max_package_id)
1247 max_package_id = cpu->package_id;
1249 ret = parse_int_file("/sys/devices/system/cpu/cpu%d/topology/core_id", i);
1250 if (ret < 0)
1251 goto err;
1252 else
1253 cpu->core_id = ret;
1254 if (cpu->core_id > max_core_id)
1255 max_core_id = cpu->core_id;
1256 ret = parse_int_file("/sys/devices/system/cpu/cpu%d/topology/core_siblings_list", i);
1257 if (ret < 0)
1258 goto err;
1259 else if (ret == i)
1260 cpu->first_core_in_package = 1;
1262 ret = get_threads_on_core(i);
1263 if (ret < 0)
1264 goto err;
1265 else
1266 num_threads = ret;
1267 if (num_threads > max_thread_id)
1268 max_thread_id = num_threads;
1269 ret = parse_int_file("/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", i);
1270 if (ret < 0)
1271 goto err;
1272 else if (ret == i)
1273 cpu->first_thread_in_core = 1;
1275 DEBUG("Turbostat plugin: cpu %d pkg %d core %d\n",
1276 i, cpu->package_id, cpu->core_id);
1277 }
1278 /* Num is max + 1 (need to count 0) */
1279 topology.num_packages = max_package_id + 1;
1280 topology.num_cores = max_core_id + 1;
1281 topology.num_threads = max_thread_id + 1;
1283 return 0;
1284 err:
1285 free(topology.cpus);
1286 return ret;
1287 }
1290 /************************
1291 * Main alloc/init/free *
1292 ************************/
1294 static int
1295 allocate_counters(struct thread_data **threads, struct core_data **cores, struct pkg_data **packages)
1296 {
1297 int i;
1298 int total_threads, total_cores;
1300 total_threads = topology.num_threads * topology.num_cores * topology.num_packages;
1301 *threads = calloc(total_threads, sizeof(struct thread_data));
1302 if (*threads == NULL)
1303 goto err;
1305 for (i = 0; i < total_threads; ++i)
1306 (*threads)[i].cpu_id = -1;
1308 total_cores = topology.num_cores * topology.num_packages;
1309 *cores = calloc(total_cores, sizeof(struct core_data));
1310 if (*cores == NULL)
1311 goto err_clean_threads;
1313 for (i = 0; i < total_cores; ++i)
1314 (*cores)[i].core_id = -1;
1316 *packages = calloc(topology.num_packages, sizeof(struct pkg_data));
1317 if (*packages == NULL)
1318 goto err_clean_cores;
1320 for (i = 0; i < topology.num_packages; i++)
1321 (*packages)[i].package_id = i;
1323 return 0;
1325 err_clean_cores:
1326 free(*cores);
1327 err_clean_threads:
1328 free(*threads);
1329 err:
1330 ERROR("Turbostat plugin: Failled to allocate memory for counters");
1331 return -ERR_CALLOC;
1332 }
1334 static int
1335 init_counter(struct thread_data *thread_base, struct core_data *core_base,
1336 struct pkg_data *pkg_base, int cpu_id)
1337 {
1338 struct thread_data *t;
1339 struct core_data *c;
1340 struct pkg_data *p;
1341 struct cpu_topology *cpu = &topology.cpus[cpu_id];
1343 t = GET_THREAD(thread_base, !(cpu->first_thread_in_core), cpu->core_id, cpu->package_id);
1344 c = GET_CORE(core_base, cpu->core_id, cpu->package_id);
1345 p = GET_PKG(pkg_base, cpu->package_id);
1347 t->cpu_id = cpu_id;
1348 if (cpu->first_thread_in_core)
1349 t->flags |= CPU_IS_FIRST_THREAD_IN_CORE;
1350 if (cpu->first_core_in_package)
1351 t->flags |= CPU_IS_FIRST_CORE_IN_PACKAGE;
1353 c->core_id = cpu->core_id;
1354 p->package_id = cpu->package_id;
1356 return 0;
1357 }
1359 static int
1360 initialize_counters(void)
1361 {
1362 int ret;
1363 int cpu_id;
1365 for (cpu_id = 0; cpu_id <= topology.max_cpu_id; ++cpu_id) {
1366 if (cpu_is_not_present(cpu_id)) {
1367 continue;
1368 }
1370 ret = init_counter(EVEN_COUNTERS, cpu_id);
1371 if (ret < 0)
1372 return ret;
1373 ret = init_counter(ODD_COUNTERS, cpu_id);
1374 if (ret < 0)
1375 return ret;
1376 ret = init_counter(DELTA_COUNTERS, cpu_id);
1377 if (ret < 0)
1378 return ret;
1379 }
1380 return 0;
1381 }
1385 static void
1386 free_all_buffers(void)
1387 {
1388 allocated = 0;
1389 initialized = 0;
1391 CPU_FREE(cpu_present_set);
1392 cpu_present_set = NULL;
1393 cpu_present_set = 0;
1395 CPU_FREE(cpu_affinity_set);
1396 cpu_affinity_set = NULL;
1397 cpu_affinity_setsize = 0;
1399 CPU_FREE(cpu_saved_affinity_set);
1400 cpu_saved_affinity_set = NULL;
1401 cpu_saved_affinity_setsize = 0;
1403 free(thread_even);
1404 free(core_even);
1405 free(package_even);
1407 thread_even = NULL;
1408 core_even = NULL;
1409 package_even = NULL;
1411 free(thread_odd);
1412 free(core_odd);
1413 free(package_odd);
1415 thread_odd = NULL;
1416 core_odd = NULL;
1417 package_odd = NULL;
1419 free(thread_delta);
1420 free(core_delta);
1421 free(package_delta);
1423 thread_delta = NULL;
1424 core_delta = NULL;
1425 package_delta = NULL;
1426 }
1429 /**********************
1430 * Collectd functions *
1431 **********************/
1433 #define DO_OR_GOTO_ERR(something) \
1434 do { \
1435 ret = (something); \
1436 if (ret < 0) \
1437 goto err; \
1438 } while (0)
1440 static int setup_all_buffers(void)
1441 {
1442 int ret;
1444 DO_OR_GOTO_ERR(topology_probe());
1445 DO_OR_GOTO_ERR(allocate_counters(&thread_even, &core_even, &package_even));
1446 DO_OR_GOTO_ERR(allocate_counters(&thread_odd, &core_odd, &package_odd));
1447 DO_OR_GOTO_ERR(allocate_counters(&thread_delta, &core_delta, &package_delta));
1448 DO_OR_GOTO_ERR(initialize_counters());
1449 DO_OR_GOTO_ERR(for_all_cpus(set_temperature_target, EVEN_COUNTERS));
1450 DO_OR_GOTO_ERR(for_all_cpus(set_temperature_target, ODD_COUNTERS));
1452 allocated = 1;
1453 return 0;
1454 err:
1455 free_all_buffers();
1456 return ret;
1457 }
1459 static int
1460 turbostat_read(void)
1461 {
1462 int ret;
1464 if (!allocated) {
1465 if ((ret = setup_all_buffers()) < 0)
1466 return ret;
1467 }
1469 if (for_all_proc_cpus(cpu_is_not_present)) {
1470 free_all_buffers();
1471 if ((ret = setup_all_buffers()) < 0)
1472 return ret;
1473 if (for_all_proc_cpus(cpu_is_not_present))
1474 return -ERR_CPU_NOT_PRESENT;
1475 }
1477 /* Saving the scheduling affinity, as it will be modified by get_counters */
1478 if (sched_getaffinity(0, cpu_saved_affinity_setsize, cpu_saved_affinity_set) != 0)
1479 return -ERR_CPU_SAVE_SCHED_AFFINITY;
1481 if (!initialized) {
1482 if ((ret = for_all_cpus(get_counters, EVEN_COUNTERS)) < 0)
1483 goto out;
1484 gettimeofday(&tv_even, (struct timezone *)NULL);
1485 is_even = 1;
1486 initialized = 1;
1487 ret = 0;
1488 goto out;
1489 }
1491 if (is_even) {
1492 if ((ret = for_all_cpus(get_counters, ODD_COUNTERS)) < 0)
1493 goto out;
1494 gettimeofday(&tv_odd, (struct timezone *)NULL);
1495 is_even = 0;
1496 timersub(&tv_odd, &tv_even, &tv_delta);
1497 if ((ret = for_all_cpus_delta(ODD_COUNTERS, EVEN_COUNTERS)) < 0)
1498 goto out;
1499 if ((ret = for_all_cpus(submit_counters, DELTA_COUNTERS)) < 0)
1500 goto out;
1501 } else {
1502 if ((ret = for_all_cpus(get_counters, EVEN_COUNTERS)) < 0)
1503 goto out;
1504 gettimeofday(&tv_even, (struct timezone *)NULL);
1505 is_even = 1;
1506 timersub(&tv_even, &tv_odd, &tv_delta);
1507 if ((ret = for_all_cpus_delta(EVEN_COUNTERS, ODD_COUNTERS)) < 0)
1508 goto out;
1509 if ((ret = for_all_cpus(submit_counters, DELTA_COUNTERS)) < 0)
1510 goto out;
1511 }
1512 ret = 0;
1513 out:
1514 /*
1515 * Let's restore the affinity
1516 * This might fail if the number of CPU changed, but we can't do anything in that case..
1517 */
1518 (void)sched_setaffinity(0, cpu_saved_affinity_setsize, cpu_saved_affinity_set);
1519 return ret;
1520 }
1522 static int
1523 turbostat_init(void)
1524 {
1525 struct stat sb;
1526 int ret;
1528 if (getuid() != 0) {
1529 ERROR("Turbostat plugin: Initialization failed: this plugin "
1530 "requires collectd to run as root in order to read "
1531 "special CPU registers");
1532 return -ERR_NOT_ROOT;
1533 }
1535 DO_OR_GOTO_ERR(probe_cpu());
1537 if (stat("/dev/cpu/0/msr", &sb)) {
1538 ERROR("Turbostat plugin: Initialization failed: /dev/cpu/0/msr"
1539 " does not exist while the CPU supports MSR. You may be "
1540 "missing the corresponding kernel module, please try '# "
1541 "modprobe msr'");
1542 return -ERR_NO_MSR;
1543 }
1545 DO_OR_GOTO_ERR(setup_all_buffers());
1547 plugin_register_read(PLUGIN_NAME, turbostat_read);
1549 return 0;
1550 err:
1551 free_all_buffers();
1552 return ret;
1553 }
1555 static const char *config_keys[] =
1556 {
1557 "TCCActivationTemp",
1558 };
1559 static const int config_keys_num = STATIC_ARRAY_SIZE (config_keys);
1561 static int
1562 turbostat_config(const char *key, const char *value)
1563 {
1564 long unsigned int tmp_val;
1565 char *end;
1567 if (strcasecmp("TCCActivationTemp", key) == 0) {
1568 tmp_val = strtoul(value, &end, 0);
1569 if (*end != '\0' || tmp_val > UINT_MAX)
1570 return -1;
1571 tcc_activation_temp = (unsigned int) tmp_val;
1572 } else {
1573 return -1;
1574 }
1575 return 0;
1576 }
1578 void module_register(void)
1579 {
1580 plugin_register_init(PLUGIN_NAME, turbostat_init);
1581 plugin_register_config(PLUGIN_NAME, turbostat_config, config_keys, config_keys_num);
1582 }