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 "collectd.h"
40 #include "common.h"
41 #include "plugin.h"
42 #include "utils_time.h"
44 #include "msr-index.h"
45 #include <cpuid.h>
46 #ifdef HAVE_SYS_CAPABILITY_H
47 #include <sys/capability.h>
48 #endif /* HAVE_SYS_CAPABILITY_H */
50 #define PLUGIN_NAME "turbostat"
52 /*
53 * This tool uses the Model-Specific Registers (MSRs) present on Intel
54 * processors.
55 * The general description each of these registers, depending on the
56 * architecture,
57 * can be found in the IntelĀ® 64 and IA-32 Architectures Software Developer
58 * Manual,
59 * Volume 3 Chapter 35.
60 */
62 /*
63 * If set, aperf_mperf_unstable disables a/mperf based stats.
64 * This includes: C0 & C1 states, frequency
65 *
66 * This value is automatically set if mperf or aperf go backward
67 */
68 static _Bool aperf_mperf_unstable;
70 /*
71 * If set, use kernel logical core numbering for all "per core" metrics.
72 */
73 static _Bool config_lcn;
75 /*
76 * Bitmask of the list of core C states supported by the processor.
77 * Currently supported C-states (by this plugin): 3, 6, 7
78 */
79 static unsigned int do_core_cstate;
80 static unsigned int config_core_cstate;
81 static _Bool apply_config_core_cstate;
83 /*
84 * Bitmask of the list of pacages C states supported by the processor.
85 * Currently supported C-states (by this plugin): 2, 3, 6, 7, 8, 9, 10
86 */
87 static unsigned int do_pkg_cstate;
88 static unsigned int config_pkg_cstate;
89 static _Bool apply_config_pkg_cstate;
91 /*
92 * Boolean indicating if the processor supports 'I/O System-Management Interrupt
93 * counter'
94 */
95 static _Bool do_smi;
96 static _Bool config_smi;
97 static _Bool apply_config_smi;
99 /*
100 * Boolean indicating if the processor supports 'Digital temperature sensor'
101 * This feature enables the monitoring of the temperature of each core
102 *
103 * This feature has two limitations:
104 * - if MSR_IA32_TEMPERATURE_TARGET is not supported, the absolute temperature
105 * might be wrong
106 * - Temperatures above the tcc_activation_temp are not recorded
107 */
108 static _Bool do_dts;
109 static _Bool config_dts;
110 static _Bool apply_config_dts;
112 /*
113 * Boolean indicating if the processor supports 'Package thermal management'
114 * This feature allows the monitoring of the temperature of each package
115 *
116 * This feature has two limitations:
117 * - if MSR_IA32_TEMPERATURE_TARGET is not supported, the absolute temperature
118 * might be wrong
119 * - Temperatures above the tcc_activation_temp are not recorded
120 */
121 static _Bool do_ptm;
122 static _Bool config_ptm;
123 static _Bool apply_config_ptm;
125 /*
126 * Thermal Control Circuit Activation Temperature as configured by the user.
127 * This override the automated detection via MSR_IA32_TEMPERATURE_TARGET
128 * and should only be used if the automated detection fails.
129 */
130 static unsigned int tcc_activation_temp;
132 static unsigned int do_rapl;
133 static unsigned int config_rapl;
134 static _Bool apply_config_rapl;
135 static double rapl_energy_units;
137 #define RAPL_PKG (1 << 0)
138 /* 0x610 MSR_PKG_POWER_LIMIT */
139 /* 0x611 MSR_PKG_ENERGY_STATUS */
140 #define RAPL_DRAM (1 << 1)
141 /* 0x618 MSR_DRAM_POWER_LIMIT */
142 /* 0x619 MSR_DRAM_ENERGY_STATUS */
143 /* 0x61c MSR_DRAM_POWER_INFO */
144 #define RAPL_CORES (1 << 2)
145 /* 0x638 MSR_PP0_POWER_LIMIT */
146 /* 0x639 MSR_PP0_ENERGY_STATUS */
148 #define RAPL_GFX (1 << 3)
149 /* 0x640 MSR_PP1_POWER_LIMIT */
150 /* 0x641 MSR_PP1_ENERGY_STATUS */
151 /* 0x642 MSR_PP1_POLICY */
152 #define TJMAX_DEFAULT 100
154 static cpu_set_t *cpu_present_set, *cpu_affinity_set, *cpu_saved_affinity_set;
155 static size_t cpu_present_setsize, cpu_affinity_setsize,
156 cpu_saved_affinity_setsize;
158 static struct thread_data {
159 unsigned long long tsc;
160 unsigned long long aperf;
161 unsigned long long mperf;
162 unsigned long long c1;
163 unsigned int smi_count;
164 unsigned int cpu_id;
165 unsigned int flags;
166 #define CPU_IS_FIRST_THREAD_IN_CORE 0x2
167 #define CPU_IS_FIRST_CORE_IN_PACKAGE 0x4
168 } * thread_delta, *thread_even, *thread_odd;
170 static struct core_data {
171 unsigned long long c3;
172 unsigned long long c6;
173 unsigned long long c7;
174 unsigned int core_temp_c;
175 unsigned int core_id;
176 } * core_delta, *core_even, *core_odd;
178 static struct pkg_data {
179 unsigned long long pc2;
180 unsigned long long pc3;
181 unsigned long long pc6;
182 unsigned long long pc7;
183 unsigned long long pc8;
184 unsigned long long pc9;
185 unsigned long long pc10;
186 unsigned int package_id;
187 uint32_t energy_pkg; /* MSR_PKG_ENERGY_STATUS */
188 uint32_t energy_dram; /* MSR_DRAM_ENERGY_STATUS */
189 uint32_t energy_cores; /* MSR_PP0_ENERGY_STATUS */
190 uint32_t energy_gfx; /* MSR_PP1_ENERGY_STATUS */
191 unsigned int tcc_activation_temp;
192 unsigned int pkg_temp_c;
193 } * package_delta, *package_even, *package_odd;
195 #define DELTA_COUNTERS thread_delta, core_delta, package_delta
196 #define ODD_COUNTERS thread_odd, core_odd, package_odd
197 #define EVEN_COUNTERS thread_even, core_even, package_even
198 static _Bool is_even = 1;
200 static _Bool allocated = 0;
201 static _Bool initialized = 0;
203 #define GET_THREAD(thread_base, thread_no, core_no, pkg_no) \
204 (thread_base + (pkg_no)*topology.num_cores * topology.num_threads + \
205 (core_no)*topology.num_threads + (thread_no))
206 #define GET_CORE(core_base, core_no, pkg_no) \
207 (core_base + (pkg_no)*topology.num_cores + (core_no))
208 #define GET_PKG(pkg_base, pkg_no) (pkg_base + pkg_no)
210 struct cpu_topology {
211 unsigned int package_id;
212 unsigned int core_id;
213 _Bool first_core_in_package;
214 _Bool first_thread_in_core;
215 };
217 static struct topology {
218 unsigned int max_cpu_id;
219 unsigned int num_packages;
220 unsigned int num_cores;
221 unsigned int num_threads;
222 struct cpu_topology *cpus;
223 } topology;
225 static cdtime_t time_even, time_odd, time_delta;
227 static const char *config_keys[] = {
228 "CoreCstates",
229 "PackageCstates",
230 "SystemManagementInterrupt",
231 "DigitalTemperatureSensor",
232 "PackageThermalManagement",
233 "TCCActivationTemp",
234 "RunningAveragePowerLimit",
235 "LogicalCoreNames",
236 };
237 static const int config_keys_num = STATIC_ARRAY_SIZE(config_keys);
239 /*****************************
240 * MSR Manipulation helpers *
241 *****************************/
243 /*
244 * Open a MSR device for reading
245 * Can change the scheduling affinity of the current process if multiple_read is
246 * 1
247 */
248 static int __attribute__((warn_unused_result))
249 open_msr(unsigned int cpu, _Bool multiple_read) {
250 char pathname[32];
251 int fd;
253 /*
254 * If we need to do multiple read, let's migrate to the CPU
255 * Otherwise, we would lose time calling functions on another CPU
256 *
257 * If we are not yet initialized (cpu_affinity_setsize = 0),
258 * we need to skip this optimisation.
259 */
260 if (multiple_read && cpu_affinity_setsize) {
261 CPU_ZERO_S(cpu_affinity_setsize, cpu_affinity_set);
262 CPU_SET_S(cpu, cpu_affinity_setsize, cpu_affinity_set);
263 if (sched_setaffinity(0, cpu_affinity_setsize, cpu_affinity_set) == -1) {
264 ERROR("turbostat plugin: Could not migrate to CPU %d", cpu);
265 return -1;
266 }
267 }
269 snprintf(pathname, sizeof(pathname), "/dev/cpu/%d/msr", cpu);
270 fd = open(pathname, O_RDONLY);
271 if (fd < 0) {
272 ERROR("turbostat plugin: failed to open %s", pathname);
273 return -1;
274 }
275 return fd;
276 }
278 /*
279 * Read a single MSR from an open file descriptor
280 */
281 static int __attribute__((warn_unused_result))
282 read_msr(int fd, off_t offset, unsigned long long *msr) {
283 ssize_t retval;
285 retval = pread(fd, msr, sizeof *msr, offset);
287 if (retval != sizeof *msr) {
288 ERROR("turbostat plugin: MSR offset 0x%llx read failed",
289 (unsigned long long)offset);
290 return -1;
291 }
292 return 0;
293 }
295 /*
296 * Open a MSR device for reading, read the value asked for and close it.
297 * This call will not affect the scheduling affinity of this thread.
298 */
299 static ssize_t __attribute__((warn_unused_result))
300 get_msr(unsigned int cpu, off_t offset, unsigned long long *msr) {
301 ssize_t retval;
302 int fd;
304 fd = open_msr(cpu, 0);
305 if (fd < 0)
306 return fd;
307 retval = read_msr(fd, offset, msr);
308 close(fd);
309 return retval;
310 }
312 /********************************
313 * Raw data acquisition (1 CPU) *
314 ********************************/
316 /*
317 * Read every data avalaible for a single CPU
318 *
319 * Core data is shared for all threads in one core: extracted only for the first
320 * thread
321 * Package data is shared for all core in one package: extracted only for the
322 * first thread of the first core
323 *
324 * Side effect: migrates to the targeted CPU
325 */
326 static int __attribute__((warn_unused_result))
327 get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p) {
328 unsigned int cpu = t->cpu_id;
329 unsigned long long msr;
330 int msr_fd;
331 int retval = 0;
333 msr_fd = open_msr(cpu, 1);
334 if (msr_fd < 0)
335 return msr_fd;
337 #define READ_MSR(msr, dst) \
338 do { \
339 if (read_msr(msr_fd, msr, dst)) { \
340 ERROR("turbostat plugin: Unable to read " #msr); \
341 retval = -1; \
342 goto out; \
343 } \
344 } while (0)
346 READ_MSR(MSR_IA32_TSC, &t->tsc);
348 READ_MSR(MSR_IA32_APERF, &t->aperf);
349 READ_MSR(MSR_IA32_MPERF, &t->mperf);
351 if (do_smi) {
352 READ_MSR(MSR_SMI_COUNT, &msr);
353 t->smi_count = msr & 0xFFFFFFFF;
354 }
356 /* collect core counters only for 1st thread in core */
357 if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE)) {
358 retval = 0;
359 goto out;
360 }
362 if (do_core_cstate & (1 << 3))
363 READ_MSR(MSR_CORE_C3_RESIDENCY, &c->c3);
364 if (do_core_cstate & (1 << 6))
365 READ_MSR(MSR_CORE_C6_RESIDENCY, &c->c6);
366 if (do_core_cstate & (1 << 7))
367 READ_MSR(MSR_CORE_C7_RESIDENCY, &c->c7);
369 if (do_dts) {
370 READ_MSR(MSR_IA32_THERM_STATUS, &msr);
371 c->core_temp_c = p->tcc_activation_temp - ((msr >> 16) & 0x7F);
372 }
374 /* collect package counters only for 1st core in package */
375 if (!(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE)) {
376 retval = 0;
377 goto out;
378 }
380 if (do_pkg_cstate & (1 << 2))
381 READ_MSR(MSR_PKG_C2_RESIDENCY, &p->pc2);
382 if (do_pkg_cstate & (1 << 3))
383 READ_MSR(MSR_PKG_C3_RESIDENCY, &p->pc3);
384 if (do_pkg_cstate & (1 << 6))
385 READ_MSR(MSR_PKG_C6_RESIDENCY, &p->pc6);
386 if (do_pkg_cstate & (1 << 7))
387 READ_MSR(MSR_PKG_C7_RESIDENCY, &p->pc7);
388 if (do_pkg_cstate & (1 << 8))
389 READ_MSR(MSR_PKG_C8_RESIDENCY, &p->pc8);
390 if (do_pkg_cstate & (1 << 9))
391 READ_MSR(MSR_PKG_C9_RESIDENCY, &p->pc9);
392 if (do_pkg_cstate & (1 << 10))
393 READ_MSR(MSR_PKG_C10_RESIDENCY, &p->pc10);
395 if (do_rapl & RAPL_PKG) {
396 READ_MSR(MSR_PKG_ENERGY_STATUS, &msr);
397 p->energy_pkg = msr & 0xFFFFFFFF;
398 }
399 if (do_rapl & RAPL_CORES) {
400 READ_MSR(MSR_PP0_ENERGY_STATUS, &msr);
401 p->energy_cores = msr & 0xFFFFFFFF;
402 }
403 if (do_rapl & RAPL_DRAM) {
404 READ_MSR(MSR_DRAM_ENERGY_STATUS, &msr);
405 p->energy_dram = msr & 0xFFFFFFFF;
406 }
407 if (do_rapl & RAPL_GFX) {
408 READ_MSR(MSR_PP1_ENERGY_STATUS, &msr);
409 p->energy_gfx = msr & 0xFFFFFFFF;
410 }
411 if (do_ptm) {
412 READ_MSR(MSR_IA32_PACKAGE_THERM_STATUS, &msr);
413 p->pkg_temp_c = p->tcc_activation_temp - ((msr >> 16) & 0x7F);
414 }
416 out:
417 close(msr_fd);
418 return retval;
419 }
421 /**********************************
422 * Evaluating the changes (1 CPU) *
423 **********************************/
425 /*
426 * Extract the evolution old->new in delta at a package level
427 * (some are not new-delta, e.g. temperature)
428 */
429 static inline void delta_package(struct pkg_data *delta,
430 const struct pkg_data *new,
431 const struct pkg_data *old) {
432 delta->pc2 = new->pc2 - old->pc2;
433 delta->pc3 = new->pc3 - old->pc3;
434 delta->pc6 = new->pc6 - old->pc6;
435 delta->pc7 = new->pc7 - old->pc7;
436 delta->pc8 = new->pc8 - old->pc8;
437 delta->pc9 = new->pc9 - old->pc9;
438 delta->pc10 = new->pc10 - old->pc10;
439 delta->pkg_temp_c = new->pkg_temp_c;
441 delta->energy_pkg = new->energy_pkg - old->energy_pkg;
442 delta->energy_cores = new->energy_cores - old->energy_cores;
443 delta->energy_gfx = new->energy_gfx - old->energy_gfx;
444 delta->energy_dram = new->energy_dram - old->energy_dram;
445 }
447 /*
448 * Extract the evolution old->new in delta at a core level
449 * (some are not new-delta, e.g. temperature)
450 */
451 static inline void delta_core(struct core_data *delta,
452 const struct core_data *new,
453 const struct core_data *old) {
454 delta->c3 = new->c3 - old->c3;
455 delta->c6 = new->c6 - old->c6;
456 delta->c7 = new->c7 - old->c7;
457 delta->core_temp_c = new->core_temp_c;
458 }
460 /*
461 * Extract the evolution old->new in delta at a package level
462 * core_delta is required for c1 estimation (tsc - c0 - all core cstates)
463 */
464 static inline int __attribute__((warn_unused_result))
465 delta_thread(struct thread_data *delta, const struct thread_data *new,
466 const struct thread_data *old, const struct core_data *cdelta) {
467 delta->tsc = new->tsc - old->tsc;
469 /* check for TSC < 1 Mcycles over interval */
470 if (delta->tsc < (1000 * 1000)) {
471 WARNING("turbostat plugin: Insanely slow TSC rate, TSC stops "
472 "in idle? You can disable all c-states by booting with"
473 " 'idle=poll' or just the deep ones with"
474 " 'processor.max_cstate=1'");
475 return -1;
476 }
478 delta->c1 = new->c1 - old->c1;
480 if ((new->aperf > old->aperf) && (new->mperf > old->mperf)) {
481 delta->aperf = new->aperf - old->aperf;
482 delta->mperf = new->mperf - old->mperf;
483 } else {
484 if (!aperf_mperf_unstable) {
485 WARNING("turbostat plugin: APERF or MPERF went "
486 "backwards. Frequency results do not cover "
487 "the entire interval. Fix this by running "
488 "Linux-2.6.30 or later.");
490 aperf_mperf_unstable = 1;
491 }
492 }
494 /*
495 * As counter collection is not atomic,
496 * it is possible for mperf's non-halted cycles + idle states
497 * to exceed TSC's all cycles: show c1 = 0% in that case.
498 */
499 if ((delta->mperf + cdelta->c3 + cdelta->c6 + cdelta->c7) > delta->tsc)
500 delta->c1 = 0;
501 else {
502 /* normal case, derive c1 */
503 delta->c1 =
504 delta->tsc - delta->mperf - cdelta->c3 - cdelta->c6 - cdelta->c7;
505 }
507 if (delta->mperf == 0) {
508 WARNING("turbostat plugin: cpu%d MPERF 0!", old->cpu_id);
509 delta->mperf = 1; /* divide by 0 protection */
510 }
512 if (do_smi)
513 delta->smi_count = new->smi_count - old->smi_count;
515 return 0;
516 }
518 /**********************************
519 * Submitting the results (1 CPU) *
520 **********************************/
522 /*
523 * Submit one gauge value
524 */
525 static void turbostat_submit(const char *plugin_instance, const char *type,
526 const char *type_instance, gauge_t value) {
527 value_list_t vl = VALUE_LIST_INIT;
529 vl.values = &(value_t){.gauge = value};
530 vl.values_len = 1;
531 sstrncpy(vl.plugin, PLUGIN_NAME, sizeof(vl.plugin));
532 if (plugin_instance != NULL)
533 sstrncpy(vl.plugin_instance, plugin_instance, sizeof(vl.plugin_instance));
534 sstrncpy(vl.type, type, sizeof(vl.type));
535 if (type_instance != NULL)
536 sstrncpy(vl.type_instance, type_instance, sizeof(vl.type_instance));
538 plugin_dispatch_values(&vl);
539 }
541 /*
542 * Submit every data for a single CPU
543 *
544 * Core data is shared for all threads in one core: submitted only for the first
545 * thread
546 * Package data is shared for all core in one package: submitted only for the
547 * first thread of the first core
548 */
549 static int submit_counters(struct thread_data *t, struct core_data *c,
550 struct pkg_data *p) {
551 char name[DATA_MAX_NAME_LEN];
552 double interval_float;
554 interval_float = CDTIME_T_TO_DOUBLE(time_delta);
556 DEBUG("turbostat plugin: submit stats for cpu: %d, core: %d, pkg: %d",
557 t->cpu_id, c->core_id, p->package_id);
559 snprintf(name, sizeof(name), "cpu%02d", t->cpu_id);
561 if (!aperf_mperf_unstable)
562 turbostat_submit(name, "percent", "c0", 100.0 * t->mperf / t->tsc);
563 if (!aperf_mperf_unstable)
564 turbostat_submit(name, "percent", "c1", 100.0 * t->c1 / t->tsc);
566 turbostat_submit(name, "frequency", "average",
567 1.0 / 1000000 * t->aperf / interval_float);
569 if ((!aperf_mperf_unstable) || (!(t->aperf > t->tsc || t->mperf > t->tsc)))
570 turbostat_submit(name, "frequency", "busy",
571 1.0 * t->tsc / 1000000 * t->aperf / t->mperf /
572 interval_float);
574 /* Sanity check (should stay stable) */
575 turbostat_submit(name, "gauge", "TSC",
576 1.0 * t->tsc / 1000000 / interval_float);
578 /* SMI */
579 if (do_smi)
580 turbostat_submit(name, "count", NULL, t->smi_count);
582 /* submit per-core data only for 1st thread in core */
583 if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE))
584 goto done;
586 /* If not using logical core numbering, set core id */
587 if (!config_lcn) {
588 if (topology.num_packages > 1)
589 snprintf(name, sizeof(name), "pkg%02d-core%02d", p->package_id, c->core_id);
590 else
591 snprintf(name, sizeof(name), "core%02d", c->core_id);
592 }
594 if (do_core_cstate & (1 << 3))
595 turbostat_submit(name, "percent", "c3", 100.0 * c->c3 / t->tsc);
596 if (do_core_cstate & (1 << 6))
597 turbostat_submit(name, "percent", "c6", 100.0 * c->c6 / t->tsc);
598 if (do_core_cstate & (1 << 7))
599 turbostat_submit(name, "percent", "c7", 100.0 * c->c7 / t->tsc);
601 if (do_dts)
602 turbostat_submit(name, "temperature", NULL, c->core_temp_c);
604 /* submit per-package data only for 1st core in package */
605 if (!(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
606 goto done;
608 snprintf(name, sizeof(name), "pkg%02d", p->package_id);
610 if (do_ptm)
611 turbostat_submit(name, "temperature", NULL, p->pkg_temp_c);
613 if (do_pkg_cstate & (1 << 2))
614 turbostat_submit(name, "percent", "pc2", 100.0 * p->pc2 / t->tsc);
615 if (do_pkg_cstate & (1 << 3))
616 turbostat_submit(name, "percent", "pc3", 100.0 * p->pc3 / t->tsc);
617 if (do_pkg_cstate & (1 << 6))
618 turbostat_submit(name, "percent", "pc6", 100.0 * p->pc6 / t->tsc);
619 if (do_pkg_cstate & (1 << 7))
620 turbostat_submit(name, "percent", "pc7", 100.0 * p->pc7 / t->tsc);
621 if (do_pkg_cstate & (1 << 8))
622 turbostat_submit(name, "percent", "pc8", 100.0 * p->pc8 / t->tsc);
623 if (do_pkg_cstate & (1 << 9))
624 turbostat_submit(name, "percent", "pc9", 100.0 * p->pc9 / t->tsc);
625 if (do_pkg_cstate & (1 << 10))
626 turbostat_submit(name, "percent", "pc10", 100.0 * p->pc10 / t->tsc);
628 if (do_rapl) {
629 if (do_rapl & RAPL_PKG)
630 turbostat_submit(name, "power", "pkg",
631 p->energy_pkg * rapl_energy_units / interval_float);
632 if (do_rapl & RAPL_CORES)
633 turbostat_submit(name, "power", "cores",
634 p->energy_cores * rapl_energy_units / interval_float);
635 if (do_rapl & RAPL_GFX)
636 turbostat_submit(name, "power", "GFX",
637 p->energy_gfx * rapl_energy_units / interval_float);
638 if (do_rapl & RAPL_DRAM)
639 turbostat_submit(name, "power", "DRAM",
640 p->energy_dram * rapl_energy_units / interval_float);
641 }
642 done:
643 return 0;
644 }
646 /**********************************
647 * Looping function over all CPUs *
648 **********************************/
650 /*
651 * Check if a given cpu id is in our compiled list of existing CPUs
652 */
653 static int cpu_is_not_present(unsigned int cpu) {
654 return !CPU_ISSET_S(cpu, cpu_present_setsize, cpu_present_set);
655 }
657 /*
658 * Loop on all CPUs in topological order
659 *
660 * Skip non-present cpus
661 * Return the error code at the first error or 0
662 */
663 static int __attribute__((warn_unused_result))
664 for_all_cpus(int(func)(struct thread_data *, struct core_data *,
665 struct pkg_data *),
666 struct thread_data *thread_base, struct core_data *core_base,
667 struct pkg_data *pkg_base) {
668 int retval;
670 for (unsigned int pkg_no = 0; pkg_no < topology.num_packages; ++pkg_no) {
671 for (unsigned int core_no = 0; core_no < topology.num_cores; ++core_no) {
672 for (unsigned int thread_no = 0; thread_no < topology.num_threads;
673 ++thread_no) {
674 struct thread_data *t;
675 struct core_data *c;
676 struct pkg_data *p;
678 t = GET_THREAD(thread_base, thread_no, core_no, pkg_no);
680 if (cpu_is_not_present(t->cpu_id))
681 continue;
683 c = GET_CORE(core_base, core_no, pkg_no);
684 p = GET_PKG(pkg_base, pkg_no);
686 retval = func(t, c, p);
687 if (retval)
688 return retval;
689 }
690 }
691 }
692 return 0;
693 }
695 /*
696 * Dedicated loop: Extract every data evolution for all CPU
697 *
698 * Skip non-present cpus
699 * Return the error code at the first error or 0
700 *
701 * Core data is shared for all threads in one core: extracted only for the first
702 * thread
703 * Package data is shared for all core in one package: extracted only for the
704 * first thread of the first core
705 */
706 static int __attribute__((warn_unused_result))
707 for_all_cpus_delta(const struct thread_data *thread_new_base,
708 const struct core_data *core_new_base,
709 const struct pkg_data *pkg_new_base,
710 const struct thread_data *thread_old_base,
711 const struct core_data *core_old_base,
712 const struct pkg_data *pkg_old_base) {
713 int retval;
715 for (unsigned int pkg_no = 0; pkg_no < topology.num_packages; ++pkg_no) {
716 for (unsigned int core_no = 0; core_no < topology.num_cores; ++core_no) {
717 for (unsigned int thread_no = 0; thread_no < topology.num_threads;
718 ++thread_no) {
719 struct thread_data *t_delta;
720 const struct thread_data *t_old, *t_new;
721 struct core_data *c_delta;
723 /* Get correct pointers for threads */
724 t_delta = GET_THREAD(thread_delta, thread_no, core_no, pkg_no);
725 t_new = GET_THREAD(thread_new_base, thread_no, core_no, pkg_no);
726 t_old = GET_THREAD(thread_old_base, thread_no, core_no, pkg_no);
728 /* Skip threads that disappeared */
729 if (cpu_is_not_present(t_delta->cpu_id))
730 continue;
732 /* c_delta is always required for delta_thread */
733 c_delta = GET_CORE(core_delta, core_no, pkg_no);
735 /* calculate core delta only for 1st thread in core */
736 if (t_new->flags & CPU_IS_FIRST_THREAD_IN_CORE) {
737 const struct core_data *c_old, *c_new;
739 c_new = GET_CORE(core_new_base, core_no, pkg_no);
740 c_old = GET_CORE(core_old_base, core_no, pkg_no);
742 delta_core(c_delta, c_new, c_old);
743 }
745 /* Always calculate thread delta */
746 retval = delta_thread(t_delta, t_new, t_old, c_delta);
747 if (retval)
748 return retval;
750 /* calculate package delta only for 1st core in package */
751 if (t_new->flags & CPU_IS_FIRST_CORE_IN_PACKAGE) {
752 struct pkg_data *p_delta;
753 const struct pkg_data *p_old, *p_new;
755 p_delta = GET_PKG(package_delta, pkg_no);
756 p_new = GET_PKG(pkg_new_base, pkg_no);
757 p_old = GET_PKG(pkg_old_base, pkg_no);
759 delta_package(p_delta, p_new, p_old);
760 }
761 }
762 }
763 }
764 return 0;
765 }
767 /***************
768 * CPU Probing *
769 ***************/
771 /*
772 * MSR_IA32_TEMPERATURE_TARGET indicates the temperature where
773 * the Thermal Control Circuit (TCC) activates.
774 * This is usually equal to tjMax.
775 *
776 * Older processors do not have this MSR, so there we guess,
777 * but also allow conficuration over-ride with "TCCActivationTemp".
778 *
779 * Several MSR temperature values are in units of degrees-C
780 * below this value, including the Digital Thermal Sensor (DTS),
781 * Package Thermal Management Sensor (PTM), and thermal event thresholds.
782 */
783 static int __attribute__((warn_unused_result))
784 set_temperature_target(struct thread_data *t, struct core_data *c,
785 struct pkg_data *p) {
786 unsigned long long msr;
787 unsigned int target_c_local;
789 /* tcc_activation_temp is used only for dts or ptm */
790 if (!(do_dts || do_ptm))
791 return 0;
793 /* this is a per-package concept */
794 if (!(t->flags & CPU_IS_FIRST_THREAD_IN_CORE) ||
795 !(t->flags & CPU_IS_FIRST_CORE_IN_PACKAGE))
796 return 0;
798 if (tcc_activation_temp != 0) {
799 p->tcc_activation_temp = tcc_activation_temp;
800 return 0;
801 }
803 if (get_msr(t->cpu_id, MSR_IA32_TEMPERATURE_TARGET, &msr))
804 goto guess;
806 target_c_local = (msr >> 16) & 0xFF;
808 if (!target_c_local)
809 goto guess;
811 p->tcc_activation_temp = target_c_local;
813 return 0;
815 guess:
816 p->tcc_activation_temp = TJMAX_DEFAULT;
817 WARNING("turbostat plugin: cpu%d: Guessing tjMax %d C,"
818 " Please use TCCActivationTemp to specify it.",
819 t->cpu_id, p->tcc_activation_temp);
821 return 0;
822 }
824 /*
825 * Identify the functionality of the CPU
826 */
827 static int __attribute__((warn_unused_result)) probe_cpu(void) {
828 unsigned int eax, ebx, ecx, edx, max_level;
829 unsigned int fms, family, model;
831 /* CPUID(0):
832 * - EAX: Maximum Input Value for Basic CPUID Information
833 * - EBX: "Genu" (0x756e6547)
834 * - EDX: "ineI" (0x49656e69)
835 * - ECX: "ntel" (0x6c65746e)
836 */
837 max_level = ebx = ecx = edx = 0;
838 __get_cpuid(0, &max_level, &ebx, &ecx, &edx);
839 if (ebx != 0x756e6547 && edx != 0x49656e69 && ecx != 0x6c65746e) {
840 ERROR("turbostat plugin: Unsupported CPU (not Intel)");
841 return -1;
842 }
844 /* CPUID(1):
845 * - EAX: Version Information: Type, Family, Model, and Stepping ID
846 * + 4-7: Model ID
847 * + 8-11: Family ID
848 * + 12-13: Processor type
849 * + 16-19: Extended Model ID
850 * + 20-27: Extended Family ID
851 * - EDX: Feature Information:
852 * + 5: Support for MSR read/write operations
853 */
854 fms = ebx = ecx = edx = 0;
855 __get_cpuid(1, &fms, &ebx, &ecx, &edx);
856 family = (fms >> 8) & 0xf;
857 model = (fms >> 4) & 0xf;
858 if (family == 0xf)
859 family += (fms >> 20) & 0xf;
860 if (family == 6 || family == 0xf)
861 model += ((fms >> 16) & 0xf) << 4;
862 if (!(edx & (1 << 5))) {
863 ERROR("turbostat plugin: Unsupported CPU (no MSR support)");
864 return -1;
865 }
867 /*
868 * CPUID(6):
869 * - EAX:
870 * + 0: Digital temperature sensor is supported if set
871 * + 6: Package thermal management is supported if set
872 * - ECX:
873 * + 0: Hardware Coordination Feedback Capability (Presence of IA32_MPERF and
874 * IA32_APERF).
875 * + 3: The processor supports performance-energy bias preference if set.
876 * It also implies the presence of a new architectural MSR called
877 * IA32_ENERGY_PERF_BIAS
878 *
879 * This check is valid for both Intel and AMD
880 */
881 eax = ebx = ecx = edx = 0;
882 __get_cpuid(0x6, &eax, &ebx, &ecx, &edx);
883 do_dts = eax & (1 << 0);
884 do_ptm = eax & (1 << 6);
885 if (!(ecx & (1 << 0))) {
886 ERROR("turbostat plugin: Unsupported CPU (No APERF)");
887 return -1;
888 }
890 /*
891 * Enable or disable C states depending on the model and family
892 */
893 if (family == 6) {
894 switch (model) {
895 /* Atom (partial) */
896 case 0x27:
897 do_smi = 0;
898 do_core_cstate = 0;
899 do_pkg_cstate = (1 << 2) | (1 << 4) | (1 << 6);
900 break;
901 /* Silvermont */
902 case 0x37: /* BYT */
903 case 0x4D: /* AVN */
904 do_smi = 1;
905 do_core_cstate = (1 << 1) | (1 << 6);
906 do_pkg_cstate = (1 << 6);
907 break;
908 /* Nehalem */
909 case 0x1A: /* Core i7, Xeon 5500 series - Bloomfield, Gainstown NHM-EP */
910 case 0x1E: /* Core i7 and i5 Processor - Clarksfield, Lynnfield, Jasper
911 Forest */
912 case 0x1F: /* Core i7 and i5 Processor - Nehalem */
913 case 0x2E: /* Nehalem-EX Xeon - Beckton */
914 do_smi = 1;
915 do_core_cstate = (1 << 3) | (1 << 6);
916 do_pkg_cstate = (1 << 3) | (1 << 6) | (1 << 7);
917 break;
918 /* Westmere */
919 case 0x25: /* Westmere Client - Clarkdale, Arrandale */
920 case 0x2C: /* Westmere EP - Gulftown */
921 case 0x2F: /* Westmere-EX Xeon - Eagleton */
922 do_smi = 1;
923 do_core_cstate = (1 << 3) | (1 << 6);
924 do_pkg_cstate = (1 << 3) | (1 << 6) | (1 << 7);
925 break;
926 /* Sandy Bridge */
927 case 0x2A: /* SNB */
928 case 0x2D: /* SNB Xeon */
929 do_smi = 1;
930 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
931 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
932 break;
933 /* Ivy Bridge */
934 case 0x3A: /* IVB */
935 case 0x3E: /* IVB Xeon */
936 do_smi = 1;
937 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
938 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
939 break;
940 /* Haswell Bridge */
941 case 0x3C: /* HSW */
942 case 0x3F: /* HSW */
943 case 0x46: /* HSW */
944 do_smi = 1;
945 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
946 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
947 break;
948 case 0x45: /* HSW */
949 do_smi = 1;
950 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
951 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7) | (1 << 8) |
952 (1 << 9) | (1 << 10);
953 break;
954 /* Broadwel */
955 case 0x4F: /* BDW */
956 case 0x56: /* BDX-DE */
957 do_smi = 1;
958 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
959 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7);
960 break;
961 case 0x3D: /* BDW */
962 do_smi = 1;
963 do_core_cstate = (1 << 3) | (1 << 6) | (1 << 7);
964 do_pkg_cstate = (1 << 2) | (1 << 3) | (1 << 6) | (1 << 7) | (1 << 8) |
965 (1 << 9) | (1 << 10);
966 break;
967 default:
968 do_smi = 0;
969 do_core_cstate = 0;
970 do_pkg_cstate = 0;
971 break;
972 }
973 switch (model) {
974 case 0x2A: /* SNB */
975 case 0x3A: /* IVB */
976 case 0x3C: /* HSW */
977 case 0x45: /* HSW */
978 case 0x46: /* HSW */
979 case 0x3D: /* BDW */
980 do_rapl = RAPL_PKG | RAPL_CORES | RAPL_GFX;
981 break;
982 case 0x3F: /* HSX */
983 case 0x4F: /* BDX */
984 case 0x56: /* BDX-DE */
985 do_rapl = RAPL_PKG | RAPL_DRAM;
986 break;
987 case 0x2D: /* SNB Xeon */
988 case 0x3E: /* IVB Xeon */
989 do_rapl = RAPL_PKG | RAPL_CORES | RAPL_DRAM;
990 break;
991 case 0x37: /* BYT */
992 case 0x4D: /* AVN */
993 do_rapl = RAPL_PKG | RAPL_CORES;
994 break;
995 default:
996 do_rapl = 0;
997 }
998 } else {
999 ERROR("turbostat plugin: Unsupported CPU (family: %#x, "
1000 "model: %#x)",
1001 family, model);
1002 return -1;
1003 }
1005 /* Override detected values with configuration */
1006 if (apply_config_core_cstate)
1007 do_core_cstate = config_core_cstate;
1008 if (apply_config_pkg_cstate)
1009 do_pkg_cstate = config_pkg_cstate;
1010 if (apply_config_smi)
1011 do_smi = config_smi;
1012 if (apply_config_dts)
1013 do_dts = config_dts;
1014 if (apply_config_ptm)
1015 do_ptm = config_ptm;
1016 if (apply_config_rapl)
1017 do_rapl = config_rapl;
1019 if (do_rapl) {
1020 unsigned long long msr;
1021 if (get_msr(0, MSR_RAPL_POWER_UNIT, &msr))
1022 return 0;
1024 if (model == 0x37)
1025 rapl_energy_units = 1.0 * (1 << (msr >> 8 & 0x1F)) / 1000000;
1026 else
1027 rapl_energy_units = 1.0 / (1 << (msr >> 8 & 0x1F));
1028 }
1030 return 0;
1031 }
1033 /********************
1034 * Topology Probing *
1035 ********************/
1037 /*
1038 * Read a single int from a file.
1039 */
1040 static int __attribute__((format(printf, 1, 2)))
1041 parse_int_file(const char *fmt, ...) {
1042 va_list args;
1043 char path[PATH_MAX];
1044 int len;
1046 va_start(args, fmt);
1047 len = vsnprintf(path, sizeof(path), fmt, args);
1048 va_end(args);
1049 if (len < 0 || len >= PATH_MAX) {
1050 ERROR("turbostat plugin: path truncated: '%s'", path);
1051 return -1;
1052 }
1054 value_t v;
1055 if (parse_value_file(path, &v, DS_TYPE_DERIVE) != 0) {
1056 ERROR("turbostat plugin: Parsing \"%s\" failed.", path);
1057 return -1;
1058 }
1060 return (int)v.derive;
1061 }
1063 static int get_threads_on_core(unsigned int cpu) {
1064 char path[80];
1065 FILE *filep;
1066 int sib1, sib2;
1067 int matches;
1068 char character;
1070 snprintf(path, sizeof(path),
1071 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", cpu);
1072 filep = fopen(path, "r");
1073 if (!filep) {
1074 ERROR("turbostat plugin: Failed to open '%s'", path);
1075 return -1;
1076 }
1077 /*
1078 * file format:
1079 * if a pair of number with a character between: 2 siblings (eg. 1-2, or 1,4)
1080 * otherwinse 1 sibling (self).
1081 */
1082 matches = fscanf(filep, "%d%c%d\n", &sib1, &character, &sib2);
1084 fclose(filep);
1086 if (matches == 3)
1087 return 2;
1088 else
1089 return 1;
1090 }
1092 /*
1093 * run func(cpu) on every cpu in /proc/stat
1094 * return max_cpu number
1095 */
1096 static int __attribute__((warn_unused_result))
1097 for_all_proc_cpus(int(func)(unsigned int)) {
1098 FILE *fp;
1099 unsigned int cpu_num;
1100 int retval;
1102 fp = fopen("/proc/stat", "r");
1103 if (!fp) {
1104 ERROR("turbostat plugin: Failed to open /proc/stat");
1105 return -1;
1106 }
1108 retval = fscanf(fp, "cpu %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n");
1109 if (retval != 0) {
1110 ERROR("turbostat plugin: Failed to parse /proc/stat");
1111 fclose(fp);
1112 return -1;
1113 }
1115 while (1) {
1116 retval =
1117 fscanf(fp, "cpu%u %*d %*d %*d %*d %*d %*d %*d %*d %*d %*d\n", &cpu_num);
1118 if (retval != 1)
1119 break;
1121 retval = func(cpu_num);
1122 if (retval) {
1123 fclose(fp);
1124 return retval;
1125 }
1126 }
1127 fclose(fp);
1128 return 0;
1129 }
1131 /*
1132 * Update the stored topology.max_cpu_id
1133 */
1134 static int update_max_cpu_id(unsigned int cpu) {
1135 if (topology.max_cpu_id < cpu)
1136 topology.max_cpu_id = cpu;
1137 return 0;
1138 }
1140 static int mark_cpu_present(unsigned int cpu) {
1141 CPU_SET_S(cpu, cpu_present_setsize, cpu_present_set);
1142 return 0;
1143 }
1145 static int __attribute__((warn_unused_result))
1146 allocate_cpu_set(cpu_set_t **set, size_t *size) {
1147 *set = CPU_ALLOC(topology.max_cpu_id + 1);
1148 if (*set == NULL) {
1149 ERROR("turbostat plugin: Unable to allocate CPU state");
1150 return -1;
1151 }
1152 *size = CPU_ALLOC_SIZE(topology.max_cpu_id + 1);
1153 CPU_ZERO_S(*size, *set);
1154 return 0;
1155 }
1157 /*
1158 * Build a local representation of the cpu distribution
1159 */
1160 static int __attribute__((warn_unused_result)) topology_probe(void) {
1161 int ret;
1162 unsigned int max_package_id, max_core_id, max_threads;
1163 max_package_id = max_core_id = max_threads = 0;
1165 /* Clean topology */
1166 free(topology.cpus);
1167 memset(&topology, 0, sizeof(topology));
1169 ret = for_all_proc_cpus(update_max_cpu_id);
1170 if (ret != 0)
1171 goto err;
1173 topology.cpus =
1174 calloc(1, (topology.max_cpu_id + 1) * sizeof(struct cpu_topology));
1175 if (topology.cpus == NULL) {
1176 ERROR("turbostat plugin: Unable to allocate memory for CPU topology");
1177 return -1;
1178 }
1180 ret = allocate_cpu_set(&cpu_present_set, &cpu_present_setsize);
1181 if (ret != 0)
1182 goto err;
1183 ret = allocate_cpu_set(&cpu_affinity_set, &cpu_affinity_setsize);
1184 if (ret != 0)
1185 goto err;
1186 ret = allocate_cpu_set(&cpu_saved_affinity_set, &cpu_saved_affinity_setsize);
1187 if (ret != 0)
1188 goto err;
1190 ret = for_all_proc_cpus(mark_cpu_present);
1191 if (ret != 0)
1192 goto err;
1194 /*
1195 * For online cpus
1196 * find max_core_id, max_package_id
1197 */
1198 for (unsigned int i = 0; i <= topology.max_cpu_id; ++i) {
1199 unsigned int num_threads;
1200 struct cpu_topology *cpu = &topology.cpus[i];
1202 if (cpu_is_not_present(i)) {
1203 WARNING("turbostat plugin: cpu%d NOT PRESENT", i);
1204 continue;
1205 }
1207 ret = parse_int_file(
1208 "/sys/devices/system/cpu/cpu%d/topology/physical_package_id", i);
1209 if (ret < 0)
1210 goto err;
1211 else
1212 cpu->package_id = (unsigned int)ret;
1213 if (cpu->package_id > max_package_id)
1214 max_package_id = cpu->package_id;
1216 ret = parse_int_file("/sys/devices/system/cpu/cpu%d/topology/core_id", i);
1217 if (ret < 0)
1218 goto err;
1219 else
1220 cpu->core_id = (unsigned int)ret;
1221 if (cpu->core_id > max_core_id)
1222 max_core_id = cpu->core_id;
1223 ret = parse_int_file(
1224 "/sys/devices/system/cpu/cpu%d/topology/core_siblings_list", i);
1225 if (ret < 0)
1226 goto err;
1227 else if ((unsigned int)ret == i)
1228 cpu->first_core_in_package = 1;
1230 ret = get_threads_on_core(i);
1231 if (ret < 0)
1232 goto err;
1233 else
1234 num_threads = (unsigned int)ret;
1235 if (num_threads > max_threads)
1236 max_threads = num_threads;
1237 ret = parse_int_file(
1238 "/sys/devices/system/cpu/cpu%d/topology/thread_siblings_list", i);
1239 if (ret < 0)
1240 goto err;
1241 else if ((unsigned int)ret == i)
1242 cpu->first_thread_in_core = 1;
1244 DEBUG("turbostat plugin: cpu %d pkg %d core %d\n", i, cpu->package_id,
1245 cpu->core_id);
1246 }
1247 /* Num is max + 1 (need to count 0) */
1248 topology.num_packages = max_package_id + 1;
1249 topology.num_cores = max_core_id + 1;
1250 topology.num_threads = max_threads;
1252 return 0;
1253 err:
1254 free(topology.cpus);
1255 return ret;
1256 }
1258 /************************
1259 * Main alloc/init/free *
1260 ************************/
1262 static int allocate_counters(struct thread_data **threads,
1263 struct core_data **cores,
1264 struct pkg_data **packages) {
1265 unsigned int total_threads, total_cores;
1267 if ((topology.num_threads == 0) || (topology.num_cores == 0) ||
1268 (topology.num_packages == 0)) {
1269 ERROR(
1270 "turbostat plugin: Invalid topology: %u threads, %u cores, %u packages",
1271 topology.num_threads, topology.num_cores, topology.num_packages);
1272 return -1;
1273 }
1275 total_threads =
1276 topology.num_threads * topology.num_cores * topology.num_packages;
1277 *threads = calloc(total_threads, sizeof(struct thread_data));
1278 if (*threads == NULL) {
1279 ERROR("turbostat plugin: calloc failed");
1280 return -1;
1281 }
1283 for (unsigned int i = 0; i < total_threads; ++i)
1284 (*threads)[i].cpu_id = topology.max_cpu_id + 1;
1286 total_cores = topology.num_cores * topology.num_packages;
1287 *cores = calloc(total_cores, sizeof(struct core_data));
1288 if (*cores == NULL) {
1289 ERROR("turbostat plugin: calloc failed");
1290 sfree(threads);
1291 return -1;
1292 }
1294 *packages = calloc(topology.num_packages, sizeof(struct pkg_data));
1295 if (*packages == NULL) {
1296 ERROR("turbostat plugin: calloc failed");
1297 sfree(cores);
1298 sfree(threads);
1299 return -1;
1300 }
1302 return 0;
1303 }
1305 static void init_counter(struct thread_data *thread_base,
1306 struct core_data *core_base, struct pkg_data *pkg_base,
1307 unsigned int cpu_id) {
1308 struct thread_data *t;
1309 struct core_data *c;
1310 struct pkg_data *p;
1311 struct cpu_topology *cpu = &topology.cpus[cpu_id];
1313 t = GET_THREAD(thread_base, !(cpu->first_thread_in_core), cpu->core_id,
1314 cpu->package_id);
1315 c = GET_CORE(core_base, cpu->core_id, cpu->package_id);
1316 p = GET_PKG(pkg_base, cpu->package_id);
1318 t->cpu_id = cpu_id;
1319 if (cpu->first_thread_in_core)
1320 t->flags |= CPU_IS_FIRST_THREAD_IN_CORE;
1321 if (cpu->first_core_in_package)
1322 t->flags |= CPU_IS_FIRST_CORE_IN_PACKAGE;
1324 c->core_id = cpu->core_id;
1325 p->package_id = cpu->package_id;
1326 }
1328 static void initialize_counters(void) {
1329 for (unsigned int cpu_id = 0; cpu_id <= topology.max_cpu_id; ++cpu_id) {
1330 if (cpu_is_not_present(cpu_id))
1331 continue;
1332 init_counter(EVEN_COUNTERS, cpu_id);
1333 init_counter(ODD_COUNTERS, cpu_id);
1334 init_counter(DELTA_COUNTERS, cpu_id);
1335 }
1336 }
1338 static void free_all_buffers(void) {
1339 allocated = 0;
1340 initialized = 0;
1342 CPU_FREE(cpu_present_set);
1343 cpu_present_set = NULL;
1344 cpu_present_setsize = 0;
1346 CPU_FREE(cpu_affinity_set);
1347 cpu_affinity_set = NULL;
1348 cpu_affinity_setsize = 0;
1350 CPU_FREE(cpu_saved_affinity_set);
1351 cpu_saved_affinity_set = NULL;
1352 cpu_saved_affinity_setsize = 0;
1354 free(thread_even);
1355 free(core_even);
1356 free(package_even);
1358 thread_even = NULL;
1359 core_even = NULL;
1360 package_even = NULL;
1362 free(thread_odd);
1363 free(core_odd);
1364 free(package_odd);
1366 thread_odd = NULL;
1367 core_odd = NULL;
1368 package_odd = NULL;
1370 free(thread_delta);
1371 free(core_delta);
1372 free(package_delta);
1374 thread_delta = NULL;
1375 core_delta = NULL;
1376 package_delta = NULL;
1377 }
1379 /**********************
1380 * Collectd functions *
1381 **********************/
1383 #define DO_OR_GOTO_ERR(something) \
1384 do { \
1385 ret = (something); \
1386 if (ret < 0) \
1387 goto err; \
1388 } while (0)
1390 static int setup_all_buffers(void) {
1391 int ret;
1393 DO_OR_GOTO_ERR(topology_probe());
1394 DO_OR_GOTO_ERR(allocate_counters(&thread_even, &core_even, &package_even));
1395 DO_OR_GOTO_ERR(allocate_counters(&thread_odd, &core_odd, &package_odd));
1396 DO_OR_GOTO_ERR(allocate_counters(&thread_delta, &core_delta, &package_delta));
1397 initialize_counters();
1398 DO_OR_GOTO_ERR(for_all_cpus(set_temperature_target, EVEN_COUNTERS));
1399 DO_OR_GOTO_ERR(for_all_cpus(set_temperature_target, ODD_COUNTERS));
1401 allocated = 1;
1402 return 0;
1403 err:
1404 free_all_buffers();
1405 return ret;
1406 }
1408 static int turbostat_read(void) {
1409 int ret;
1411 if (!allocated) {
1412 if ((ret = setup_all_buffers()) < 0)
1413 return ret;
1414 }
1416 if (for_all_proc_cpus(cpu_is_not_present)) {
1417 free_all_buffers();
1418 if ((ret = setup_all_buffers()) < 0)
1419 return ret;
1420 if (for_all_proc_cpus(cpu_is_not_present)) {
1421 ERROR("turbostat plugin: CPU appeared just after "
1422 "initialization");
1423 return -1;
1424 }
1425 }
1427 /* Saving the scheduling affinity, as it will be modified by get_counters */
1428 if (sched_getaffinity(0, cpu_saved_affinity_setsize,
1429 cpu_saved_affinity_set) != 0) {
1430 ERROR("turbostat plugin: Unable to save the CPU affinity");
1431 return -1;
1432 }
1434 if (!initialized) {
1435 if ((ret = for_all_cpus(get_counters, EVEN_COUNTERS)) < 0)
1436 goto out;
1437 time_even = cdtime();
1438 is_even = 1;
1439 initialized = 1;
1440 ret = 0;
1441 goto out;
1442 }
1444 if (is_even) {
1445 if ((ret = for_all_cpus(get_counters, ODD_COUNTERS)) < 0)
1446 goto out;
1447 time_odd = cdtime();
1448 is_even = 0;
1449 time_delta = time_odd - time_even;
1450 if ((ret = for_all_cpus_delta(ODD_COUNTERS, EVEN_COUNTERS)) < 0)
1451 goto out;
1452 if ((ret = for_all_cpus(submit_counters, DELTA_COUNTERS)) < 0)
1453 goto out;
1454 } else {
1455 if ((ret = for_all_cpus(get_counters, EVEN_COUNTERS)) < 0)
1456 goto out;
1457 time_even = cdtime();
1458 is_even = 1;
1459 time_delta = time_even - time_odd;
1460 if ((ret = for_all_cpus_delta(EVEN_COUNTERS, ODD_COUNTERS)) < 0)
1461 goto out;
1462 if ((ret = for_all_cpus(submit_counters, DELTA_COUNTERS)) < 0)
1463 goto out;
1464 }
1465 ret = 0;
1466 out:
1467 /*
1468 * Let's restore the affinity
1469 * This might fail if the number of CPU changed, but we can't do anything in
1470 * that case..
1471 */
1472 (void)sched_setaffinity(0, cpu_saved_affinity_setsize,
1473 cpu_saved_affinity_set);
1474 return ret;
1475 }
1477 static int check_permissions(void) {
1479 if (getuid() == 0) {
1480 /* We have everything we need */
1481 return 0;
1482 #if !defined(HAVE_SYS_CAPABILITY_H) && !defined(CAP_SYS_RAWIO)
1483 } else {
1484 ERROR("turbostat plugin: Initialization failed: this plugin "
1485 "requires collectd to run as root");
1486 return -1;
1487 }
1488 #else /* HAVE_SYS_CAPABILITY_H && CAP_SYS_RAWIO */
1489 }
1491 int ret = 0;
1493 if (check_capability(CAP_SYS_RAWIO) != 0) {
1494 WARNING("turbostat plugin: Collectd doesn't have the "
1495 "CAP_SYS_RAWIO capability. If you don't want to run "
1496 "collectd as root, try running \"setcap "
1497 "cap_sys_rawio=ep\" on collectd binary");
1498 ret = -1;
1499 }
1501 if (euidaccess("/dev/cpu/0/msr", R_OK)) {
1502 WARNING("turbostat plugin: Collectd cannot open "
1503 "/dev/cpu/0/msr. If you don't want to run collectd as "
1504 "root, you need to change the ownership (chown) and "
1505 "permissions on /dev/cpu/*/msr to allow such access");
1506 ret = -1;
1507 }
1509 if (ret != 0)
1510 ERROR("turbostat plugin: Initialization failed: this plugin "
1511 "requires collectd to either to run as root or give "
1512 "collectd a special capability (CAP_SYS_RAWIO) and read "
1513 "access to /dev/cpu/*/msr (see previous warnings)");
1514 return ret;
1515 #endif /* HAVE_SYS_CAPABILITY_H && CAP_SYS_RAWIO */
1516 }
1518 static int turbostat_init(void) {
1519 struct stat sb;
1520 int ret;
1522 if (stat("/dev/cpu/0/msr", &sb)) {
1523 ERROR("turbostat plugin: Initialization failed: /dev/cpu/0/msr "
1524 "does not exist while the CPU supports MSR. You may be "
1525 "missing the corresponding kernel module, please try '# "
1526 "modprobe msr'");
1527 return -1;
1528 }
1530 DO_OR_GOTO_ERR(check_permissions());
1532 DO_OR_GOTO_ERR(probe_cpu());
1534 DO_OR_GOTO_ERR(setup_all_buffers());
1536 plugin_register_read(PLUGIN_NAME, turbostat_read);
1538 return 0;
1539 err:
1540 free_all_buffers();
1541 return ret;
1542 }
1544 static int turbostat_config(const char *key, const char *value) {
1545 long unsigned int tmp_val;
1546 char *end;
1548 if (strcasecmp("CoreCstates", key) == 0) {
1549 tmp_val = strtoul(value, &end, 0);
1550 if (*end != '\0' || tmp_val > UINT_MAX) {
1551 ERROR("turbostat plugin: Invalid CoreCstates '%s'", value);
1552 return -1;
1553 }
1554 config_core_cstate = (unsigned int)tmp_val;
1555 apply_config_core_cstate = 1;
1556 } else if (strcasecmp("PackageCstates", key) == 0) {
1557 tmp_val = strtoul(value, &end, 0);
1558 if (*end != '\0' || tmp_val > UINT_MAX) {
1559 ERROR("turbostat plugin: Invalid PackageCstates '%s'", value);
1560 return -1;
1561 }
1562 config_pkg_cstate = (unsigned int)tmp_val;
1563 apply_config_pkg_cstate = 1;
1564 } else if (strcasecmp("SystemManagementInterrupt", key) == 0) {
1565 config_smi = IS_TRUE(value);
1566 apply_config_smi = 1;
1567 } else if (strcasecmp("DigitalTemperatureSensor", key) == 0) {
1568 config_dts = IS_TRUE(value);
1569 apply_config_dts = 1;
1570 } else if (strcasecmp("PackageThermalManagement", key) == 0) {
1571 config_ptm = IS_TRUE(value);
1572 apply_config_ptm = 1;
1573 } else if (strcasecmp("LogicalCoreNames", key) == 0) {
1574 config_lcn = IS_TRUE(value);
1575 } else if (strcasecmp("RunningAveragePowerLimit", key) == 0) {
1576 tmp_val = strtoul(value, &end, 0);
1577 if (*end != '\0' || tmp_val > UINT_MAX) {
1578 ERROR("turbostat plugin: Invalid RunningAveragePowerLimit '%s'", value);
1579 return -1;
1580 }
1581 config_rapl = (unsigned int)tmp_val;
1582 apply_config_rapl = 1;
1583 } else if (strcasecmp("TCCActivationTemp", key) == 0) {
1584 tmp_val = strtoul(value, &end, 0);
1585 if (*end != '\0' || tmp_val > UINT_MAX) {
1586 ERROR("turbostat plugin: Invalid TCCActivationTemp '%s'", value);
1587 return -1;
1588 }
1589 tcc_activation_temp = (unsigned int)tmp_val;
1590 } else {
1591 ERROR("turbostat plugin: Invalid configuration option '%s'", key);
1592 return -1;
1593 }
1594 return 0;
1595 }
1597 void module_register(void) {
1598 plugin_register_init(PLUGIN_NAME, turbostat_init);
1599 plugin_register_config(PLUGIN_NAME, turbostat_config, config_keys,
1600 config_keys_num);
1601 }