2 * Copyright 2008-2011 Novell Inc
3 * Copyright 2011 Xamarin Inc
4 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
8 #include "utils/mono-proclib.h"
9 #include "utils/mono-time.h"
18 #ifdef HAVE_SCHED_GETAFFINITY
27 #if defined(_POSIX_VERSION)
28 #include <sys/errno.h>
29 #include <sys/param.h>
31 #ifdef HAVE_SYS_TYPES_H
32 #include <sys/types.h>
34 #ifdef HAVE_SYS_SYSCTL_H
35 #include <sys/sysctl.h>
37 #include <sys/resource.h>
39 #if defined(__APPLE__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__)
41 #if defined(__APPLE__)
42 #include <mach/mach.h>
44 #ifdef HAVE_SYS_USER_H
47 #ifdef HAVE_STRUCT_KINFO_PROC_KP_PROC
48 # define kinfo_starttime_member kp_proc.p_starttime
49 # define kinfo_pid_member kp_proc.p_pid
50 # define kinfo_name_member kp_proc.p_comm
51 #elif defined(__NetBSD__)
52 # define kinfo_starttime_member p_ustart_sec
53 # define kinfo_pid_member p_pid
54 # define kinfo_name_member p_comm
55 #elif defined(__OpenBSD__)
56 // Can not figure out how to get the proc's start time on OpenBSD
57 # undef kinfo_starttime_member
58 # define kinfo_pid_member p_pid
59 # define kinfo_name_member p_comm
61 #define kinfo_starttime_member ki_start
62 #define kinfo_pid_member ki_pid
63 #define kinfo_name_member ki_comm
70 * @size: a pointer to a location where the size of the returned array is stored
72 * Return an array of pid values for the processes currently running on the system.
73 * The size of the array is stored in @size.
76 mono_process_list (int *size)
82 size_t data_len = sizeof (struct kinfo_proc2) * 400;
83 struct kinfo_proc2 *processes = g_malloc (data_len);
86 size_t data_len = sizeof (struct kinfo_proc) * 16;
87 struct kinfo_proc *processes;
89 #endif /* KERN_PROC2 */
100 mib [1] = KERN_PROC2;
101 mib [2] = KERN_PROC_ALL;
103 mib [4] = sizeof(struct kinfo_proc2);
104 mib [5] = 400; /* XXX */
106 res = sysctl (mib, 6, processes, &data_len, NULL, 0);
116 mib [2] = KERN_PROC_ALL;
119 res = sysctl (mib, 4, NULL, &data_len, NULL, 0);
122 processes = (struct kinfo_proc *) g_malloc (data_len);
123 res = sysctl (mib, 4, processes, &data_len, NULL, 0);
133 #endif /* KERN_PROC2 */
136 res = data_len/sizeof (struct kinfo_proc2);
138 res = data_len/sizeof (struct kinfo_proc);
139 #endif /* KERN_PROC2 */
140 buf = (void **) g_realloc (buf, res * sizeof (void*));
141 for (i = 0; i < res; ++i)
142 buf [i] = GINT_TO_POINTER (processes [i].kinfo_pid_member);
147 #elif defined(__HAIKU__)
148 /* FIXME: Add back the code from 9185fcc305e43428d0f40f3ee37c8a405d41c9ae */
149 g_assert_not_reached ();
156 GDir *dir = g_dir_open ("/proc/", 0, NULL);
162 while ((name = g_dir_read_name (dir))) {
165 pid = strtol (name, &nend, 10);
166 if (pid <= 0 || nend == name || *nend)
173 buf = (void **)g_realloc (buf, count * sizeof (void*));
175 buf [i++] = GINT_TO_POINTER (pid);
184 static G_GNUC_UNUSED char*
185 get_pid_status_item_buf (int pid, const char *item, char *rbuf, int blen, MonoProcessError *error)
190 int len = strlen (item);
192 g_snprintf (buf, sizeof (buf), "/proc/%d/status", pid);
193 f = fopen (buf, "r");
196 *error = MONO_PROCESS_ERROR_NOT_FOUND;
199 while ((s = fgets (buf, sizeof (buf), f))) {
202 if (strncmp (buf, item, len))
205 while (g_ascii_isspace (*s)) s++;
208 while (g_ascii_isspace (*s)) s++;
211 strncpy (rbuf, s, MIN (len, blen));
212 rbuf [MIN (len, blen) - 1] = 0;
214 *error = MONO_PROCESS_ERROR_NONE;
219 *error = MONO_PROCESS_ERROR_OTHER;
226 #define KINFO_PROC struct kinfo_proc2
228 #define KINFO_PROC struct kinfo_proc
232 sysctl_kinfo_proc (gpointer pid, KINFO_PROC* processi)
235 size_t data_len = sizeof (KINFO_PROC);
240 mib [1] = KERN_PROC2;
241 mib [2] = KERN_PROC_PID;
242 mib [3] = GPOINTER_TO_UINT (pid);
243 mib [4] = sizeof(KINFO_PROC);
244 mib [5] = 400; /* XXX */
246 res = sysctl (mib, 6, processi, &data_len, NULL, 0);
251 mib [2] = KERN_PROC_PID;
252 mib [3] = GPOINTER_TO_UINT (pid);
254 res = sysctl (mib, 4, processi, &data_len, NULL, 0);
255 #endif /* KERN_PROC2 */
257 if (res < 0 || data_len != sizeof (KINFO_PROC))
262 #endif /* USE_SYSCTL */
265 * mono_process_get_name:
266 * @pid: pid of the process
267 * @buf: byte buffer where to store the name of the prcoess
268 * @len: size of the buffer @buf
270 * Return the name of the process identified by @pid, storing it
271 * inside @buf for a maximum of len bytes (including the terminating 0).
274 mono_process_get_name (gpointer pid, char *buf, int len)
279 memset (buf, 0, len);
281 if (sysctl_kinfo_proc (pid, &processi))
282 strncpy (buf, processi.kinfo_name_member, len - 1);
290 sprintf (fname, "/proc/%d/cmdline", GPOINTER_TO_INT (pid));
292 file = fopen (fname, "r");
295 r = fread (buf, 1, len - 1, file);
298 p = strrchr (buf, '/');
302 return get_pid_status_item_buf (GPOINTER_TO_INT (pid), "Name", buf, len, NULL);
309 mono_process_get_times (gpointer pid, gint64 *start_time, gint64 *user_time, gint64 *kernel_time)
312 *user_time = mono_process_get_data (pid, MONO_PROCESS_USER_TIME);
315 *kernel_time = mono_process_get_data (pid, MONO_PROCESS_SYSTEM_TIME);
320 #if USE_SYSCTL && defined(kinfo_starttime_member)
324 if (sysctl_kinfo_proc (pid, &processi)) {
325 #if defined(__NetBSD__)
327 tv.tv_sec = processi.kinfo_starttime_member;
328 tv.tv_usec = processi.p_ustart_usec;
329 *start_time = mono_100ns_datetime_from_timeval(tv);
331 *start_time = mono_100ns_datetime_from_timeval (processi.kinfo_starttime_member);
337 if (*start_time == 0) {
338 static guint64 boot_time = 0;
340 boot_time = mono_100ns_datetime () - mono_msec_boottime () * 10000;
342 *start_time = boot_time + mono_process_get_data (pid, MONO_PROCESS_ELAPSED);
348 * /proc/pid/stat format:
350 * [0] ppid pgid sid tty_nr tty_pgrp flags min_flt cmin_flt maj_flt cmaj_flt
351 * [10] utime stime cutime cstime prio nice threads 0 start_time vsize
352 * [20] rss rsslim start_code end_code start_stack esp eip pending blocked sigign
353 * [30] sigcatch wchan 0 0 exit_signal cpu rt_prio policy
356 #define RET_ERROR(err) do { \
357 if (error) *error = (err); \
362 get_process_stat_item (int pid, int pos, int sum, MonoProcessError *error)
364 #if defined(__APPLE__)
365 double process_user_time = 0, process_system_time = 0;//, process_percent = 0;
367 struct task_basic_info t_info;
368 mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT, th_count;
369 thread_array_t th_array;
373 if (pid == getpid ()) {
374 /* task_for_pid () doesn't work on ios, even for the current process */
375 task = mach_task_self ();
378 ret = task_for_pid (mach_task_self (), pid, &task);
379 } while (ret == KERN_ABORTED);
381 if (ret != KERN_SUCCESS)
382 RET_ERROR (MONO_PROCESS_ERROR_NOT_FOUND);
386 ret = task_info (task, TASK_BASIC_INFO, (task_info_t)&t_info, &t_info_count);
387 } while (ret == KERN_ABORTED);
389 if (ret != KERN_SUCCESS) {
390 if (pid != getpid ())
391 mach_port_deallocate (mach_task_self (), task);
392 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
396 ret = task_threads (task, &th_array, &th_count);
397 } while (ret == KERN_ABORTED);
399 if (ret != KERN_SUCCESS) {
400 if (pid != getpid ())
401 mach_port_deallocate (mach_task_self (), task);
402 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
405 for (i = 0; i < th_count; i++) {
406 double thread_user_time, thread_system_time;//, thread_percent;
408 struct thread_basic_info th_info;
409 mach_msg_type_number_t th_info_count = THREAD_BASIC_INFO_COUNT;
411 ret = thread_info(th_array[i], THREAD_BASIC_INFO, (thread_info_t)&th_info, &th_info_count);
412 } while (ret == KERN_ABORTED);
414 if (ret == KERN_SUCCESS) {
415 thread_user_time = th_info.user_time.seconds + th_info.user_time.microseconds / 1e6;
416 thread_system_time = th_info.system_time.seconds + th_info.system_time.microseconds / 1e6;
417 //thread_percent = (double)th_info.cpu_usage / TH_USAGE_SCALE;
419 process_user_time += thread_user_time;
420 process_system_time += thread_system_time;
421 //process_percent += th_percent;
425 for (i = 0; i < th_count; i++)
426 mach_port_deallocate(task, th_array[i]);
428 if (pid != getpid ())
429 mach_port_deallocate (mach_task_self (), task);
431 process_user_time += t_info.user_time.seconds + t_info.user_time.microseconds / 1e6;
432 process_system_time += t_info.system_time.seconds + t_info.system_time.microseconds / 1e6;
434 if (pos == 10 && sum == TRUE)
435 return (gint64)((process_user_time + process_system_time) * 10000000);
437 return (gint64)(process_user_time * 10000000);
439 return (gint64)(process_system_time * 10000000);
449 g_snprintf (buf, sizeof (buf), "/proc/%d/stat", pid);
450 f = fopen (buf, "r");
452 RET_ERROR (MONO_PROCESS_ERROR_NOT_FOUND);
453 len = fread (buf, 1, sizeof (buf), f);
456 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
457 s = strchr (buf, ')');
459 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
461 while (g_ascii_isspace (*s)) s++;
463 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
464 /* skip the status char */
465 while (*s && !g_ascii_isspace (*s)) s++;
467 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
468 for (i = 0; i < pos; ++i) {
469 while (g_ascii_isspace (*s)) s++;
471 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
472 while (*s && !g_ascii_isspace (*s)) s++;
474 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
476 /* we are finally at the needed item */
477 value = strtoul (s, &end, 0);
478 /* add also the following value */
480 while (g_ascii_isspace (*s)) s++;
482 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
483 value += strtoul (s, &end, 0);
486 *error = MONO_PROCESS_ERROR_NONE;
494 static int user_hz = 0;
497 user_hz = sysconf (_SC_CLK_TCK);
506 get_process_stat_time (int pid, int pos, int sum, MonoProcessError *error)
508 gint64 val = get_process_stat_item (pid, pos, sum, error);
509 #if defined(__APPLE__)
512 /* return 100ns ticks */
513 return (val * 10000000) / get_user_hz ();
518 get_pid_status_item (int pid, const char *item, MonoProcessError *error, int multiplier)
520 #if defined(__APPLE__)
521 // ignore the multiplier
525 struct task_basic_info t_info;
526 mach_msg_type_number_t th_count = TASK_BASIC_INFO_COUNT;
527 kern_return_t mach_ret;
529 if (pid == getpid ()) {
530 /* task_for_pid () doesn't work on ios, even for the current process */
531 task = mach_task_self ();
534 mach_ret = task_for_pid (mach_task_self (), pid, &task);
535 } while (mach_ret == KERN_ABORTED);
537 if (mach_ret != KERN_SUCCESS)
538 RET_ERROR (MONO_PROCESS_ERROR_NOT_FOUND);
542 mach_ret = task_info (task, TASK_BASIC_INFO, (task_info_t)&t_info, &th_count);
543 } while (mach_ret == KERN_ABORTED);
545 if (mach_ret != KERN_SUCCESS) {
546 if (pid != getpid ())
547 mach_port_deallocate (mach_task_self (), task);
548 RET_ERROR (MONO_PROCESS_ERROR_OTHER);
551 if (strcmp (item, "VmRSS") == 0 || strcmp (item, "VmHWM") == 0 || strcmp (item, "VmData") == 0)
552 ret = t_info.resident_size;
553 else if (strcmp (item, "VmSize") == 0 || strcmp (item, "VmPeak") == 0)
554 ret = t_info.virtual_size;
555 else if (strcmp (item, "Threads") == 0)
560 if (pid != getpid ())
561 mach_port_deallocate (mach_task_self (), task);
568 s = get_pid_status_item_buf (pid, item, buf, sizeof (buf), error);
570 return ((gint64) atol (s)) * multiplier;
576 * mono_process_get_data:
577 * @pid: pid of the process
578 * @data: description of data to return
580 * Return a data item of a process like user time, memory use etc,
581 * according to the @data argumet.
584 mono_process_get_data_with_error (gpointer pid, MonoProcessData data, MonoProcessError *error)
587 int rpid = GPOINTER_TO_INT (pid);
590 *error = MONO_PROCESS_ERROR_OTHER;
593 case MONO_PROCESS_NUM_THREADS:
594 return get_pid_status_item (rpid, "Threads", error, 1);
595 case MONO_PROCESS_USER_TIME:
596 return get_process_stat_time (rpid, 10, FALSE, error);
597 case MONO_PROCESS_SYSTEM_TIME:
598 return get_process_stat_time (rpid, 11, FALSE, error);
599 case MONO_PROCESS_TOTAL_TIME:
600 return get_process_stat_time (rpid, 10, TRUE, error);
601 case MONO_PROCESS_WORKING_SET:
602 return get_pid_status_item (rpid, "VmRSS", error, 1024);
603 case MONO_PROCESS_WORKING_SET_PEAK:
604 val = get_pid_status_item (rpid, "VmHWM", error, 1024);
606 val = get_pid_status_item (rpid, "VmRSS", error, 1024);
608 case MONO_PROCESS_PRIVATE_BYTES:
609 return get_pid_status_item (rpid, "VmData", error, 1024);
610 case MONO_PROCESS_VIRTUAL_BYTES:
611 return get_pid_status_item (rpid, "VmSize", error, 1024);
612 case MONO_PROCESS_VIRTUAL_BYTES_PEAK:
613 val = get_pid_status_item (rpid, "VmPeak", error, 1024);
615 val = get_pid_status_item (rpid, "VmSize", error, 1024);
617 case MONO_PROCESS_FAULTS:
618 return get_process_stat_item (rpid, 6, TRUE, error);
619 case MONO_PROCESS_ELAPSED:
620 return get_process_stat_time (rpid, 18, FALSE, error);
621 case MONO_PROCESS_PPID:
622 return get_process_stat_time (rpid, 0, FALSE, error);
623 case MONO_PROCESS_PAGED_BYTES:
624 return get_pid_status_item (rpid, "VmSwap", error, 1024);
627 case MONO_PROCESS_END:
634 mono_process_get_data (gpointer pid, MonoProcessData data)
636 MonoProcessError error;
637 return mono_process_get_data_with_error (pid, data, &error);
641 mono_process_current_pid ()
643 #if defined(HAVE_UNISTD_H)
644 return (int) getpid ();
645 #elif defined(HOST_WIN32)
646 return (int) GetCurrentProcessId ();
655 * Return the number of processors on the system.
658 mono_cpu_count (void)
662 GetSystemInfo (&info);
663 return info.dwNumberOfProcessors;
665 #ifdef PLATFORM_ANDROID
666 /* Android tries really hard to save power by powering off CPUs on SMP phones which
667 * means the normal way to query cpu count returns a wrong value with userspace API.
668 * Instead we use /sys entries to query the actual hardware CPU count.
671 char buffer[8] = {'\0'};
672 int present = open ("/sys/devices/system/cpu/present", O_RDONLY);
673 /* Format of the /sys entry is a cpulist of indexes which in the case
674 * of present is always of the form "0-(n-1)" when there is more than
675 * 1 core, n being the number of CPU cores in the system. Otherwise
676 * the value is simply 0
678 if (present != -1 && read (present, (char*)buffer, sizeof (buffer)) > 3)
679 count = strtol (((char*)buffer) + 2, NULL, 10);
686 #if defined(HOST_ARM) || defined (HOST_ARM64)
689 * Recap from Alexander Köplinger <alex.koeplinger@outlook.com>:
691 * When we merged the change from PR #2722, we started seeing random failures on ARM in
692 * the MonoTests.System.Threading.ThreadPoolTests.SetAndGetMaxThreads and
693 * MonoTests.System.Threading.ManualResetEventSlimTests.Constructor_Defaults tests. Both
694 * of those tests are dealing with Environment.ProcessorCount to verify some implementation
697 * It turns out that on the Jetson TK1 board we use on public Jenkins and on ARM kernels
698 * in general, the value returned by sched_getaffinity (or _SC_NPROCESSORS_ONLN) doesn't
699 * contain CPUs/cores that are powered off for power saving reasons. This is contrary to
700 * what happens on x86, where even cores in deep-sleep state are returned [1], [2]. This
701 * means that we would get a processor count of 1 at one point in time and a higher value
702 * when load increases later on as the system wakes CPUs.
704 * Various runtime pieces like the threadpool and also user code however relies on the
705 * value returned by Environment.ProcessorCount e.g. for deciding how many parallel tasks
706 * to start, thereby limiting the performance when that code thinks we only have one CPU.
708 * Talking to a few people, this was the reason why we changed to _SC_NPROCESSORS_CONF in
709 * mono#1688 and why we added a special case for Android in mono@de3addc to get the "real"
710 * number of processors in the system.
712 * Because of those issues Android/Dalvik also switched from _ONLN to _SC_NPROCESSORS_CONF
713 * for the Java API Runtime.availableProcessors() too [3], citing:
714 * > Traditionally this returned the number currently online, but many mobile devices are
715 * able to take unused cores offline to save power, so releases newer than Android 4.2 (Jelly
716 * Bean) return the maximum number of cores that could be made available if there were no
717 * power or heat constraints.
719 * The problem with sticking to _SC_NPROCESSORS_CONF however is that it breaks down in
720 * constrained environments like Docker or with an explicit CPU affinity set by the Linux
721 * `taskset` command, They'd get a higher CPU count than can be used, start more threads etc.
722 * which results in unnecessary context switches and overloaded systems. That's why we need
723 * to respect sched_getaffinity.
725 * So while in an ideal world we would be able to rely on sched_getaffinity/_SC_NPROCESSORS_ONLN
726 * to return the number of theoretically available CPUs regardless of power saving measures
727 * everywhere, we can't do this on ARM.
729 * I think the pragmatic solution is the following:
730 * * use sched_getaffinity (+ fallback to _SC_NPROCESSORS_ONLN in case of error) on x86. This
731 * ensures we're inline with what OpenJDK [4] and CoreCLR [5] do
732 * * use _SC_NPROCESSORS_CONF exclusively on ARM (I think we could eventually even get rid of
733 * the PLATFORM_ANDROID special case)
737 * [1] https://sourceware.org/ml/libc-alpha/2013-07/msg00383.html
738 * [2] https://lists.01.org/pipermail/powertop/2012-September/000433.html
739 * [3] https://android.googlesource.com/platform/libcore/+/750dc634e56c58d1d04f6a138734ac2b772900b5%5E1..750dc634e56c58d1d04f6a138734ac2b772900b5/
740 * [4] https://bugs.openjdk.java.net/browse/JDK-6515172
741 * [5] https://github.com/dotnet/coreclr/blob/7058273693db2555f127ce16e6b0c5b40fb04867/src/pal/src/misc/sysinfo.cpp#L148
744 #ifdef _SC_NPROCESSORS_CONF
746 int count = sysconf (_SC_NPROCESSORS_CONF);
754 #ifdef HAVE_SCHED_GETAFFINITY
757 if (sched_getaffinity (mono_process_current_pid (), sizeof (set), &set) == 0)
758 return CPU_COUNT (&set);
761 #ifdef _SC_NPROCESSORS_ONLN
763 int count = sysconf (_SC_NPROCESSORS_ONLN);
769 #endif /* defined(HOST_ARM) || defined (HOST_ARM64) */
775 size_t len = sizeof (int);
778 if (sysctl (mib, 2, &count, &len, NULL, 0) == 0)
782 #endif /* HOST_WIN32 */
788 get_cpu_times (int cpu_id, gint64 *user, gint64 *systemt, gint64 *irq, gint64 *sirq, gint64 *idle)
792 int hz = get_user_hz ();
793 guint64 user_ticks = 0, nice_ticks = 0, system_ticks = 0, idle_ticks = 0, irq_ticks = 0, sirq_ticks = 0;
794 FILE *f = fopen ("/proc/stat", "r");
798 hz *= mono_cpu_count ();
799 while ((s = fgets (buf, sizeof (buf), f))) {
801 if (cpu_id < 0 && strncmp (s, "cpu", 3) == 0 && g_ascii_isspace (s [3])) {
803 } else if (cpu_id >= 0 && strncmp (s, "cpu", 3) == 0 && strtol (s + 3, &data, 10) == cpu_id) {
811 user_ticks = strtoull (data, &data, 10);
812 nice_ticks = strtoull (data, &data, 10);
813 system_ticks = strtoull (data, &data, 10);
814 idle_ticks = strtoull (data, &data, 10);
815 /* iowait_ticks = strtoull (data, &data, 10); */
816 irq_ticks = strtoull (data, &data, 10);
817 sirq_ticks = strtoull (data, &data, 10);
823 *user = (user_ticks + nice_ticks) * 10000000 / hz;
825 *systemt = (system_ticks) * 10000000 / hz;
827 *irq = (irq_ticks) * 10000000 / hz;
829 *sirq = (sirq_ticks) * 10000000 / hz;
831 *idle = (idle_ticks) * 10000000 / hz;
836 * @cpu_id: processor number or -1 to get a summary of all the processors
837 * @data: type of data to retrieve
839 * Get data about a processor on the system, like time spent in user space or idle time.
842 mono_cpu_get_data (int cpu_id, MonoCpuData data, MonoProcessError *error)
847 *error = MONO_PROCESS_ERROR_NONE;
849 case MONO_CPU_USER_TIME:
850 get_cpu_times (cpu_id, &value, NULL, NULL, NULL, NULL);
852 case MONO_CPU_PRIV_TIME:
853 get_cpu_times (cpu_id, NULL, &value, NULL, NULL, NULL);
855 case MONO_CPU_INTR_TIME:
856 get_cpu_times (cpu_id, NULL, NULL, &value, NULL, NULL);
858 case MONO_CPU_DCP_TIME:
859 get_cpu_times (cpu_id, NULL, NULL, NULL, &value, NULL);
861 case MONO_CPU_IDLE_TIME:
862 get_cpu_times (cpu_id, NULL, NULL, NULL, NULL, &value);
873 mono_atexit (void (*func)(void))
875 #ifdef PLATFORM_ANDROID
876 /* Some versions of android libc doesn't define atexit () */
879 return atexit (func);
884 * This function returns the cpu usage in percentage,
885 * normalized on the number of cores.
887 * Warning : the percentage returned can be > 100%. This
888 * might happens on systems like Android which, for
889 * battery and performance reasons, shut down cores and
890 * lie about the number of active cores.
893 mono_cpu_usage (MonoCpuUsageState *prev)
895 gint32 cpu_usage = 0;
896 gint64 cpu_total_time;
897 gint64 cpu_busy_time;
900 struct rusage resource_usage;
905 if (getrusage (RUSAGE_SELF, &resource_usage) == -1) {
906 g_error ("getrusage() failed, errno is %d (%s)\n", errno, strerror (errno));
910 current_time = mono_100ns_ticks ();
911 kernel_time = resource_usage.ru_stime.tv_sec * 1000 * 1000 * 10 + resource_usage.ru_stime.tv_usec * 10;
912 user_time = resource_usage.ru_utime.tv_sec * 1000 * 1000 * 10 + resource_usage.ru_utime.tv_usec * 10;
914 cpu_busy_time = (user_time - (prev ? prev->user_time : 0)) + (kernel_time - (prev ? prev->kernel_time : 0));
915 cpu_total_time = (current_time - (prev ? prev->current_time : 0)) * mono_cpu_count ();
918 prev->kernel_time = kernel_time;
919 prev->user_time = user_time;
920 prev->current_time = current_time;
927 if (!GetSystemTimes ((FILETIME*) &idle_time, (FILETIME*) &kernel_time, (FILETIME*) &user_time)) {
928 g_error ("GetSystemTimes() failed, error code is %d\n", GetLastError ());
932 cpu_total_time = (gint64)((user_time - (prev ? prev->user_time : 0)) + (kernel_time - (prev ? prev->kernel_time : 0)));
933 cpu_busy_time = (gint64)(cpu_total_time - (idle_time - (prev ? prev->idle_time : 0)));
936 prev->idle_time = idle_time;
937 prev->kernel_time = kernel_time;
938 prev->user_time = user_time;
942 if (cpu_total_time > 0 && cpu_busy_time > 0)
943 cpu_usage = (gint32)(cpu_busy_time * 100 / cpu_total_time);