~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

TOMOYO Linux Cross Reference
Linux/tools/perf/tests/sw-clock.c

Version: ~ [ linux-6.12-rc7 ] ~ [ linux-6.11.7 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.60 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.116 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.171 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.229 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.285 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.323 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.12 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

Diff markup

Differences between /tools/perf/tests/sw-clock.c (Version linux-6.12-rc7) and /tools/perf/tests/sw-clock.c (Version linux-5.13.19)


  1 // SPDX-License-Identifier: GPL-2.0                 1 // SPDX-License-Identifier: GPL-2.0
  2 #include <errno.h>                                  2 #include <errno.h>
  3 #include <inttypes.h>                               3 #include <inttypes.h>
  4 #include <unistd.h>                                 4 #include <unistd.h>
  5 #include <stdlib.h>                                 5 #include <stdlib.h>
  6 #include <signal.h>                                 6 #include <signal.h>
  7 #include <sys/mman.h>                               7 #include <sys/mman.h>
  8 #include <linux/string.h>                           8 #include <linux/string.h>
  9                                                     9 
 10 #include "tests.h"                                 10 #include "tests.h"
 11 #include "util/debug.h"                            11 #include "util/debug.h"
 12 #include "util/evsel.h"                            12 #include "util/evsel.h"
 13 #include "util/evlist.h"                           13 #include "util/evlist.h"
 14 #include "util/cpumap.h"                           14 #include "util/cpumap.h"
 15 #include "util/mmap.h"                             15 #include "util/mmap.h"
 16 #include "util/sample.h"                       << 
 17 #include "util/thread_map.h"                       16 #include "util/thread_map.h"
 18 #include <perf/evlist.h>                           17 #include <perf/evlist.h>
 19 #include <perf/mmap.h>                             18 #include <perf/mmap.h>
 20                                                    19 
 21 #define NR_LOOPS  10000000                         20 #define NR_LOOPS  10000000
 22                                                    21 
 23 /*                                                 22 /*
 24  * This test will open software clock events (     23  * This test will open software clock events (cpu-clock, task-clock)
 25  * then check their frequency -> period conver     24  * then check their frequency -> period conversion has no artifact of
 26  * setting period to 1 forcefully.                 25  * setting period to 1 forcefully.
 27  */                                                26  */
 28 static int __test__sw_clock_freq(enum perf_sw_     27 static int __test__sw_clock_freq(enum perf_sw_ids clock_id)
 29 {                                                  28 {
 30         int i, err = -1;                           29         int i, err = -1;
 31         volatile int tmp = 0;                      30         volatile int tmp = 0;
 32         u64 total_periods = 0;                     31         u64 total_periods = 0;
 33         int nr_samples = 0;                        32         int nr_samples = 0;
 34         char sbuf[STRERR_BUFSIZE];                 33         char sbuf[STRERR_BUFSIZE];
 35         union perf_event *event;                   34         union perf_event *event;
 36         struct evsel *evsel;                       35         struct evsel *evsel;
 37         struct evlist *evlist;                     36         struct evlist *evlist;
 38         struct perf_event_attr attr = {            37         struct perf_event_attr attr = {
 39                 .type = PERF_TYPE_SOFTWARE,        38                 .type = PERF_TYPE_SOFTWARE,
 40                 .config = clock_id,                39                 .config = clock_id,
 41                 .sample_type = PERF_SAMPLE_PER     40                 .sample_type = PERF_SAMPLE_PERIOD,
 42                 .exclude_kernel = 1,               41                 .exclude_kernel = 1,
 43                 .disabled = 1,                     42                 .disabled = 1,
 44                 .freq = 1,                         43                 .freq = 1,
 45         };                                         44         };
 46         struct perf_cpu_map *cpus = NULL;          45         struct perf_cpu_map *cpus = NULL;
 47         struct perf_thread_map *threads = NULL     46         struct perf_thread_map *threads = NULL;
 48         struct mmap *md;                           47         struct mmap *md;
 49                                                    48 
 50         attr.sample_freq = 500;                    49         attr.sample_freq = 500;
 51                                                    50 
 52         evlist = evlist__new();                    51         evlist = evlist__new();
 53         if (evlist == NULL) {                      52         if (evlist == NULL) {
 54                 pr_debug("evlist__new\n");         53                 pr_debug("evlist__new\n");
 55                 return -1;                         54                 return -1;
 56         }                                          55         }
 57                                                    56 
 58         evsel = evsel__new(&attr);                 57         evsel = evsel__new(&attr);
 59         if (evsel == NULL) {                       58         if (evsel == NULL) {
 60                 pr_debug("evsel__new\n");          59                 pr_debug("evsel__new\n");
 61                 goto out_delete_evlist;            60                 goto out_delete_evlist;
 62         }                                          61         }
 63         evlist__add(evlist, evsel);                62         evlist__add(evlist, evsel);
 64                                                    63 
 65         cpus = perf_cpu_map__new_any_cpu();    !!  64         cpus = perf_cpu_map__dummy_new();
 66         threads = thread_map__new_by_tid(getpi     65         threads = thread_map__new_by_tid(getpid());
 67         if (!cpus || !threads) {                   66         if (!cpus || !threads) {
 68                 err = -ENOMEM;                     67                 err = -ENOMEM;
 69                 pr_debug("Not enough memory to     68                 pr_debug("Not enough memory to create thread/cpu maps\n");
 70                 goto out_delete_evlist;            69                 goto out_delete_evlist;
 71         }                                          70         }
 72                                                    71 
 73         perf_evlist__set_maps(&evlist->core, c     72         perf_evlist__set_maps(&evlist->core, cpus, threads);
 74                                                    73 
 75         if (evlist__open(evlist)) {                74         if (evlist__open(evlist)) {
 76                 const char *knob = "/proc/sys/     75                 const char *knob = "/proc/sys/kernel/perf_event_max_sample_rate";
 77                                                    76 
 78                 err = -errno;                      77                 err = -errno;
 79                 pr_debug("Couldn't open evlist     78                 pr_debug("Couldn't open evlist: %s\nHint: check %s, using %" PRIu64 " in this test.\n",
 80                          str_error_r(errno, sb     79                          str_error_r(errno, sbuf, sizeof(sbuf)),
 81                          knob, (u64)attr.sampl     80                          knob, (u64)attr.sample_freq);
 82                 goto out_delete_evlist;            81                 goto out_delete_evlist;
 83         }                                          82         }
 84                                                    83 
 85         err = evlist__mmap(evlist, 128);           84         err = evlist__mmap(evlist, 128);
 86         if (err < 0) {                             85         if (err < 0) {
 87                 pr_debug("failed to mmap event     86                 pr_debug("failed to mmap event: %d (%s)\n", errno,
 88                          str_error_r(errno, sb     87                          str_error_r(errno, sbuf, sizeof(sbuf)));
 89                 goto out_delete_evlist;            88                 goto out_delete_evlist;
 90         }                                          89         }
 91                                                    90 
 92         evlist__enable(evlist);                    91         evlist__enable(evlist);
 93                                                    92 
 94         /* collect samples */                      93         /* collect samples */
 95         for (i = 0; i < NR_LOOPS; i++)             94         for (i = 0; i < NR_LOOPS; i++)
 96                 tmp++;                             95                 tmp++;
 97                                                    96 
 98         evlist__disable(evlist);                   97         evlist__disable(evlist);
 99                                                    98 
100         md = &evlist->mmap[0];                     99         md = &evlist->mmap[0];
101         if (perf_mmap__read_init(&md->core) <     100         if (perf_mmap__read_init(&md->core) < 0)
102                 goto out_init;                    101                 goto out_init;
103                                                   102 
104         while ((event = perf_mmap__read_event(    103         while ((event = perf_mmap__read_event(&md->core)) != NULL) {
105                 struct perf_sample sample;        104                 struct perf_sample sample;
106                                                   105 
107                 if (event->header.type != PERF    106                 if (event->header.type != PERF_RECORD_SAMPLE)
108                         goto next_event;          107                         goto next_event;
109                                                   108 
110                 err = evlist__parse_sample(evl    109                 err = evlist__parse_sample(evlist, event, &sample);
111                 if (err < 0) {                    110                 if (err < 0) {
112                         pr_debug("Error during    111                         pr_debug("Error during parse sample\n");
113                         goto out_delete_evlist    112                         goto out_delete_evlist;
114                 }                                 113                 }
115                                                   114 
116                 total_periods += sample.period    115                 total_periods += sample.period;
117                 nr_samples++;                     116                 nr_samples++;
118 next_event:                                       117 next_event:
119                 perf_mmap__consume(&md->core);    118                 perf_mmap__consume(&md->core);
120         }                                         119         }
121         perf_mmap__read_done(&md->core);          120         perf_mmap__read_done(&md->core);
122                                                   121 
123 out_init:                                         122 out_init:
124         if ((u64) nr_samples == total_periods)    123         if ((u64) nr_samples == total_periods) {
125                 pr_debug("All (%d) samples hav    124                 pr_debug("All (%d) samples have period value of 1!\n",
126                          nr_samples);             125                          nr_samples);
127                 err = -1;                         126                 err = -1;
128         }                                         127         }
129                                                   128 
130 out_delete_evlist:                                129 out_delete_evlist:
131         perf_cpu_map__put(cpus);                  130         perf_cpu_map__put(cpus);
132         perf_thread_map__put(threads);            131         perf_thread_map__put(threads);
133         evlist__delete(evlist);                   132         evlist__delete(evlist);
134         return err;                               133         return err;
135 }                                                 134 }
136                                                   135 
137 static int test__sw_clock_freq(struct test_sui !! 136 int test__sw_clock_freq(struct test *test __maybe_unused, int subtest __maybe_unused)
138 {                                                 137 {
139         int ret;                                  138         int ret;
140                                                   139 
141         ret = __test__sw_clock_freq(PERF_COUNT    140         ret = __test__sw_clock_freq(PERF_COUNT_SW_CPU_CLOCK);
142         if (!ret)                                 141         if (!ret)
143                 ret = __test__sw_clock_freq(PE    142                 ret = __test__sw_clock_freq(PERF_COUNT_SW_TASK_CLOCK);
144                                                   143 
145         return ret;                               144         return ret;
146 }                                                 145 }
147                                                << 
148 DEFINE_SUITE("Software clock events period val << 
149                                                   146 

~ [ source navigation ] ~ [ diff markup ] ~ [ identifier search ] ~

kernel.org | git.kernel.org | LWN.net | Project Home | SVN repository | Mail admin

Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.

sflogo.php