diff options
author | Namhyung Kim <namhyung.kim@lge.com> | 2013-03-17 22:41:47 -0400 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2013-03-18 10:43:16 -0400 |
commit | bc96b361cbf90e61d2665b1305cd2c4ac1fd9cfc (patch) | |
tree | 3f9afd9dcd204629151f5707875f42e39ba5e59b /tools/perf | |
parent | d134ffb919ab142b2359ae45a0cf4a5bfa1ff283 (diff) |
perf tests: Add a test case for checking sw clock event frequency
This test case checks frequency conversion of hrtimer-based software
clock events (cpu-clock, task-clock) have valid (non-1) periods.
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1363574507-18808-2-git-send-email-namhyung@kernel.org
[ committer note: Moved .sample_freq to outside named init block to cope with some gcc versions ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
-rw-r--r-- | tools/perf/Makefile | 1 | ||||
-rw-r--r-- | tools/perf/tests/builtin-test.c | 4 | ||||
-rw-r--r-- | tools/perf/tests/sw-clock.c | 119 | ||||
-rw-r--r-- | tools/perf/tests/tests.h | 1 |
4 files changed, 125 insertions, 0 deletions
diff --git a/tools/perf/Makefile b/tools/perf/Makefile index 8e1bba35a1ee..0230b75ed7f9 100644 --- a/tools/perf/Makefile +++ b/tools/perf/Makefile | |||
@@ -514,6 +514,7 @@ LIB_OBJS += $(OUTPUT)tests/python-use.o | |||
514 | LIB_OBJS += $(OUTPUT)tests/bp_signal.o | 514 | LIB_OBJS += $(OUTPUT)tests/bp_signal.o |
515 | LIB_OBJS += $(OUTPUT)tests/bp_signal_overflow.o | 515 | LIB_OBJS += $(OUTPUT)tests/bp_signal_overflow.o |
516 | LIB_OBJS += $(OUTPUT)tests/task-exit.o | 516 | LIB_OBJS += $(OUTPUT)tests/task-exit.o |
517 | LIB_OBJS += $(OUTPUT)tests/sw-clock.o | ||
517 | 518 | ||
518 | BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o | 519 | BUILTIN_OBJS += $(OUTPUT)builtin-annotate.o |
519 | BUILTIN_OBJS += $(OUTPUT)builtin-bench.o | 520 | BUILTIN_OBJS += $(OUTPUT)builtin-bench.o |
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c index 9b5c70a180d2..0918ada4cc41 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c | |||
@@ -90,6 +90,10 @@ static struct test { | |||
90 | .func = test__task_exit, | 90 | .func = test__task_exit, |
91 | }, | 91 | }, |
92 | { | 92 | { |
93 | .desc = "Test software clock events have valid period values", | ||
94 | .func = test__sw_clock_freq, | ||
95 | }, | ||
96 | { | ||
93 | .func = NULL, | 97 | .func = NULL, |
94 | }, | 98 | }, |
95 | }; | 99 | }; |
diff --git a/tools/perf/tests/sw-clock.c b/tools/perf/tests/sw-clock.c new file mode 100644 index 000000000000..2e41e2d32ccc --- /dev/null +++ b/tools/perf/tests/sw-clock.c | |||
@@ -0,0 +1,119 @@ | |||
1 | #include <unistd.h> | ||
2 | #include <stdlib.h> | ||
3 | #include <signal.h> | ||
4 | #include <sys/mman.h> | ||
5 | |||
6 | #include "tests.h" | ||
7 | #include "util/evsel.h" | ||
8 | #include "util/evlist.h" | ||
9 | #include "util/cpumap.h" | ||
10 | #include "util/thread_map.h" | ||
11 | |||
12 | #define NR_LOOPS 1000000 | ||
13 | |||
14 | /* | ||
15 | * This test will open software clock events (cpu-clock, task-clock) | ||
16 | * then check their frequency -> period conversion has no artifact of | ||
17 | * setting period to 1 forcefully. | ||
18 | */ | ||
19 | static int __test__sw_clock_freq(enum perf_sw_ids clock_id) | ||
20 | { | ||
21 | int i, err = -1; | ||
22 | volatile int tmp = 0; | ||
23 | u64 total_periods = 0; | ||
24 | int nr_samples = 0; | ||
25 | union perf_event *event; | ||
26 | struct perf_evsel *evsel; | ||
27 | struct perf_evlist *evlist; | ||
28 | struct perf_event_attr attr = { | ||
29 | .type = PERF_TYPE_SOFTWARE, | ||
30 | .config = clock_id, | ||
31 | .sample_type = PERF_SAMPLE_PERIOD, | ||
32 | .exclude_kernel = 1, | ||
33 | .disabled = 1, | ||
34 | .freq = 1, | ||
35 | }; | ||
36 | |||
37 | attr.sample_freq = 10000; | ||
38 | |||
39 | evlist = perf_evlist__new(); | ||
40 | if (evlist == NULL) { | ||
41 | pr_debug("perf_evlist__new\n"); | ||
42 | return -1; | ||
43 | } | ||
44 | |||
45 | evsel = perf_evsel__new(&attr, 0); | ||
46 | if (evsel == NULL) { | ||
47 | pr_debug("perf_evsel__new\n"); | ||
48 | goto out_free_evlist; | ||
49 | } | ||
50 | perf_evlist__add(evlist, evsel); | ||
51 | |||
52 | evlist->cpus = cpu_map__dummy_new(); | ||
53 | evlist->threads = thread_map__new_by_tid(getpid()); | ||
54 | if (!evlist->cpus || !evlist->threads) { | ||
55 | err = -ENOMEM; | ||
56 | pr_debug("Not enough memory to create thread/cpu maps\n"); | ||
57 | goto out_delete_maps; | ||
58 | } | ||
59 | |||
60 | perf_evlist__open(evlist); | ||
61 | |||
62 | err = perf_evlist__mmap(evlist, 128, true); | ||
63 | if (err < 0) { | ||
64 | pr_debug("failed to mmap event: %d (%s)\n", errno, | ||
65 | strerror(errno)); | ||
66 | goto out_close_evlist; | ||
67 | } | ||
68 | |||
69 | perf_evlist__enable(evlist); | ||
70 | |||
71 | /* collect samples */ | ||
72 | for (i = 0; i < NR_LOOPS; i++) | ||
73 | tmp++; | ||
74 | |||
75 | perf_evlist__disable(evlist); | ||
76 | |||
77 | while ((event = perf_evlist__mmap_read(evlist, 0)) != NULL) { | ||
78 | struct perf_sample sample; | ||
79 | |||
80 | if (event->header.type != PERF_RECORD_SAMPLE) | ||
81 | continue; | ||
82 | |||
83 | err = perf_evlist__parse_sample(evlist, event, &sample); | ||
84 | if (err < 0) { | ||
85 | pr_debug("Error during parse sample\n"); | ||
86 | goto out_unmap_evlist; | ||
87 | } | ||
88 | |||
89 | total_periods += sample.period; | ||
90 | nr_samples++; | ||
91 | } | ||
92 | |||
93 | if ((u64) nr_samples == total_periods) { | ||
94 | pr_debug("All (%d) samples have period value of 1!\n", | ||
95 | nr_samples); | ||
96 | err = -1; | ||
97 | } | ||
98 | |||
99 | out_unmap_evlist: | ||
100 | perf_evlist__munmap(evlist); | ||
101 | out_close_evlist: | ||
102 | perf_evlist__close(evlist); | ||
103 | out_delete_maps: | ||
104 | perf_evlist__delete_maps(evlist); | ||
105 | out_free_evlist: | ||
106 | perf_evlist__delete(evlist); | ||
107 | return err; | ||
108 | } | ||
109 | |||
110 | int test__sw_clock_freq(void) | ||
111 | { | ||
112 | int ret; | ||
113 | |||
114 | ret = __test__sw_clock_freq(PERF_COUNT_SW_CPU_CLOCK); | ||
115 | if (!ret) | ||
116 | ret = __test__sw_clock_freq(PERF_COUNT_SW_TASK_CLOCK); | ||
117 | |||
118 | return ret; | ||
119 | } | ||
diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index b33b3286ad6e..dd7feae2d37b 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h | |||
@@ -26,5 +26,6 @@ int test__python_use(void); | |||
26 | int test__bp_signal(void); | 26 | int test__bp_signal(void); |
27 | int test__bp_signal_overflow(void); | 27 | int test__bp_signal_overflow(void); |
28 | int test__task_exit(void); | 28 | int test__task_exit(void); |
29 | int test__sw_clock_freq(void); | ||
29 | 30 | ||
30 | #endif /* TESTS_H */ | 31 | #endif /* TESTS_H */ |