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authorShunsuke Nakamura <nakamura.shun@fujitsu.com>2021-11-09 11:58:31 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2021-12-08 04:18:23 +0300
commita7f3713f6bf207e6d8dd484704dba6089f7ad8db (patch)
tree1254b70af70b11621ec590ebcc5db915e0065e7c /tools/lib
parentf2c4dcf191904d28d710290eea4a623710eee57c (diff)
downloadlinux-a7f3713f6bf207e6d8dd484704dba6089f7ad8db.tar.xz
libperf tests: Add test_stat_multiplexing test
Adds a test for a counter obtained using read() system call during multiplexing. $ sudo make tests -C ./tools/lib/perf/ V=1 make: Entering directory '/home/nakamura/build_work/build_kernel/linux_kernel/linux/tools/lib/perf' make -f /home/nakamura/build_work/build_kernel/linux_kernel/linux/tools/build/Makefile.build dir=. obj=libperf make -C /home/nakamura/build_work/build_kernel/linux_kernel/linux/tools/lib/api/ O= libapi.a make -f /home/nakamura/build_work/build_kernel/linux_kernel/linux/tools/build/Makefile.build dir=./fd obj=libapi make -f /home/nakamura/build_work/build_kernel/linux_kernel/linux/tools/build/Makefile.build dir=./fs obj=libapi make -f /home/nakamura/build_work/build_kernel/linux_kernel/linux/tools/build/Makefile.build dir=. obj=tests make -f /home/nakamura/build_work/build_kernel/linux_kernel/linux/tools/build/Makefile.build dir=./tests obj=tests running static: - running tests/test-cpumap.c...OK - running tests/test-threadmap.c...OK - running tests/test-evlist.c... Event 0 -- Raw count = 298049842, run = 270269503, enable = 456262127 Scaled count = 503160191 (59.24%, 270269503/456262127) Event 1 -- Raw count = 299134173, run = 271075173, enable = 456257234 Scaled count = 503484435 (59.41%, 271075173/456257234) Event 2 -- Raw count = 300461996, run = 272069283, enable = 456253417 Scaled count = 503867290 (59.63%, 272069283/456253417) Event 3 -- Raw count = 301308704, run = 273063387, enable = 456249352 Scaled count = 503443183 (59.85%, 273063387/456249352) Event 4 -- Raw count = 302531164, run = 274102932, enable = 456244712 Scaled count = 503563543 (60.08%, 274102932/456244712) Event 5 -- Raw count = 303710254, run = 275406214, enable = 456228165 Scaled count = 503115633 (60.37%, 275406214/456228165) Event 6 -- Raw count = 304531302, run = 276396076, enable = 456221130 Scaled count = 502661313 (60.58%, 276396076/456221130) Event 7 -- Raw count = 304486460, run = 276601890, enable = 456213754 Scaled count = 502205212 (60.63%, 276601890/456213754) Event 8 -- Raw count = 304116681, run = 276631326, enable = 456205562 Scaled count = 501532936 (60.64%, 276631326/456205562) Event 9 -- Raw count = 303567766, run = 276188567, enable = 456196839 Scaled count = 501420666 (60.54%, 276188567/456196839) Event 10 -- Raw count = 302238014, run = 275144001, enable = 456185300 Scaled count = 501106833 (60.31%, 275144001/456185300) Event 11 -- Raw count = 300805716, run = 273824589, enable = 456175608 Scaled count = 501124573 (60.03%, 273824589/456175608) Event 12 -- Raw count = 299959051, run = 272834556, enable = 456166593 Scaled count = 501517477 (59.81%, 272834556/456166593) Event 13 -- Raw count = 299037090, run = 271820805, enable = 456157086 Scaled count = 501830195 (59.59%, 271820805/456157086) Event 14 -- Raw count = 298327042, run = 270784311, enable = 456147546 Scaled count = 502544433 (59.36%, 270784311/456147546) Expected: 501614268 High: 503867290 Low: 298049842 Average: 502438527 Average Error = 0.16% OK - running tests/test-evsel.c... loop = 65536, count = 328182 loop = 131072, count = 660214 loop = 262144, count = 1315534 loop = 524288, count = 2635364 loop = 1048576, count = 5271971 loop = 65536, count = 491952 loop = 131072, count = 850061 loop = 262144, count = 1648608 loop = 524288, count = 3162059 loop = 1048576, count = 6353393 OK running dynamic: - running tests/test-cpumap.c...OK - running tests/test-threadmap.c...OK - running tests/test-evlist.c... Event 0 -- Raw count = 300218292, run = 297528154, enable = 496789343 Scaled count = 501281125 (59.89%, 297528154/496789343) Event 1 -- Raw count = 301438606, run = 298515328, enable = 496784768 Scaled count = 501649643 (60.09%, 298515328/496784768) Event 2 -- Raw count = 302342618, run = 298798983, enable = 496782015 Scaled count = 502673648 (60.15%, 298798983/496782015) Event 3 -- Raw count = 303132319, run = 299230407, enable = 496778508 Scaled count = 503256412 (60.23%, 299230407/496778508) Event 4 -- Raw count = 302758195, run = 299218047, enable = 496774243 Scaled count = 502651743 (60.23%, 299218047/496774243) Event 5 -- Raw count = 303158458, run = 299204274, enable = 496769146 Scaled count = 503334281 (60.23%, 299204274/496769146) Event 6 -- Raw count = 303471397, run = 299197479, enable = 496763124 Scaled count = 503859189 (60.23%, 299197479/496763124) Event 7 -- Raw count = 303583387, run = 299196861, enable = 496756458 Scaled count = 504039405 (60.23%, 299196861/496756458) Event 8 -- Raw count = 303096897, run = 299186924, enable = 496748667 Scaled count = 503240507 (60.23%, 299186924/496748667) Event 9 -- Raw count = 301424173, run = 297845086, enable = 496739994 Scaled count = 502709122 (59.96%, 297845086/496739994) Event 10 -- Raw count = 300876415, run = 296851339, enable = 496729034 Scaled count = 503464297 (59.76%, 296851339/496729034) Event 11 -- Raw count = 300239338, run = 296547963, enable = 496719538 Scaled count = 502902612 (59.70%, 296547963/496719538) Event 12 -- Raw count = 299751948, run = 296547195, enable = 496710036 Scaled count = 502077926 (59.70%, 296547195/496710036) Event 13 -- Raw count = 299341883, run = 296549981, enable = 496700423 Scaled count = 501376663 (59.70%, 296549981/496700423) Event 14 -- Raw count = 299145476, run = 296561684, enable = 496690949 Scaled count = 501018366 (59.71%, 296561684/496690949) Expected: 501669431 High: 504039405 Low: 300218292 Average: 502635662 Average Error = 0.19% OK - running tests/test-evsel.c... loop = 65536, count = 329275 loop = 131072, count = 664638 loop = 262144, count = 1315367 loop = 524288, count = 2629617 loop = 1048576, count = 5273657 loop = 65536, count = 459641 loop = 131072, count = 978402 loop = 262144, count = 1581219 loop = 524288, count = 3774908 loop = 1048576, count = 7694417 OK make: Leaving directory '/home/nakamura/build_work/build_kernel/linux_kernel/linux/tools/lib/perf' Signed-off-by: Shunsuke Nakamura <nakamura.shun@fujitsu.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rob Herring <robh@kernel.org> Link: https://lore.kernel.org/r/20211109085831.3770594-4-nakamura.shun@fujitsu.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/lib')
-rw-r--r--tools/lib/perf/tests/test-evlist.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/tools/lib/perf/tests/test-evlist.c b/tools/lib/perf/tests/test-evlist.c
index ce91a582f0e4..520a78267743 100644
--- a/tools/lib/perf/tests/test-evlist.c
+++ b/tools/lib/perf/tests/test-evlist.c
@@ -21,6 +21,9 @@
#include "tests.h"
#include <internal/evsel.h>
+#define EVENT_NUM 15
+#define WAIT_COUNT 100000000UL
+
static int libperf_print(enum libperf_print_level level,
const char *fmt, va_list ap)
{
@@ -413,6 +416,159 @@ static int test_mmap_cpus(void)
return 0;
}
+static double display_error(long long average,
+ long long high,
+ long long low,
+ long long expected)
+{
+ double error;
+
+ error = (((double)average - expected) / expected) * 100.0;
+
+ __T_VERBOSE(" Expected: %lld\n", expected);
+ __T_VERBOSE(" High: %lld Low: %lld Average: %lld\n",
+ high, low, average);
+
+ __T_VERBOSE(" Average Error = %.2f%%\n", error);
+
+ return error;
+}
+
+static int test_stat_multiplexing(void)
+{
+ struct perf_counts_values expected_counts = { .val = 0 };
+ struct perf_counts_values counts[EVENT_NUM] = {{ .val = 0 },};
+ struct perf_thread_map *threads;
+ struct perf_evlist *evlist;
+ struct perf_evsel *evsel;
+ struct perf_event_attr attr = {
+ .type = PERF_TYPE_HARDWARE,
+ .config = PERF_COUNT_HW_INSTRUCTIONS,
+ .read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
+ PERF_FORMAT_TOTAL_TIME_RUNNING,
+ .disabled = 1,
+ };
+ int err, i, nonzero = 0;
+ unsigned long count;
+ long long max = 0, min = 0, avg = 0;
+ double error = 0.0;
+ s8 scaled = 0;
+
+ /* read for non-multiplexing event count */
+ threads = perf_thread_map__new_dummy();
+ __T("failed to create threads", threads);
+
+ perf_thread_map__set_pid(threads, 0, 0);
+
+ evsel = perf_evsel__new(&attr);
+ __T("failed to create evsel", evsel);
+
+ err = perf_evsel__open(evsel, NULL, threads);
+ __T("failed to open evsel", err == 0);
+
+ err = perf_evsel__enable(evsel);
+ __T("failed to enable evsel", err == 0);
+
+ /* wait loop */
+ count = WAIT_COUNT;
+ while (count--)
+ ;
+
+ perf_evsel__read(evsel, 0, 0, &expected_counts);
+ __T("failed to read value for evsel", expected_counts.val != 0);
+ __T("failed to read non-multiplexing event count",
+ expected_counts.ena == expected_counts.run);
+
+ err = perf_evsel__disable(evsel);
+ __T("failed to enable evsel", err == 0);
+
+ perf_evsel__close(evsel);
+ perf_evsel__delete(evsel);
+
+ perf_thread_map__put(threads);
+
+ /* read for multiplexing event count */
+ threads = perf_thread_map__new_dummy();
+ __T("failed to create threads", threads);
+
+ perf_thread_map__set_pid(threads, 0, 0);
+
+ evlist = perf_evlist__new();
+ __T("failed to create evlist", evlist);
+
+ for (i = 0; i < EVENT_NUM; i++) {
+ evsel = perf_evsel__new(&attr);
+ __T("failed to create evsel", evsel);
+
+ perf_evlist__add(evlist, evsel);
+ }
+ perf_evlist__set_maps(evlist, NULL, threads);
+
+ err = perf_evlist__open(evlist);
+ __T("failed to open evsel", err == 0);
+
+ perf_evlist__enable(evlist);
+
+ /* wait loop */
+ count = WAIT_COUNT;
+ while (count--)
+ ;
+
+ i = 0;
+ perf_evlist__for_each_evsel(evlist, evsel) {
+ perf_evsel__read(evsel, 0, 0, &counts[i]);
+ __T("failed to read value for evsel", counts[i].val != 0);
+ i++;
+ }
+
+ perf_evlist__disable(evlist);
+
+ min = counts[0].val;
+ for (i = 0; i < EVENT_NUM; i++) {
+ __T_VERBOSE("Event %2d -- Raw count = %lu, run = %lu, enable = %lu\n",
+ i, counts[i].val, counts[i].run, counts[i].ena);
+
+ perf_counts_values__scale(&counts[i], true, &scaled);
+ if (scaled == 1) {
+ __T_VERBOSE("\t Scaled count = %lu (%.2lf%%, %lu/%lu)\n",
+ counts[i].val,
+ (double)counts[i].run / (double)counts[i].ena * 100.0,
+ counts[i].run, counts[i].ena);
+ } else if (scaled == -1) {
+ __T_VERBOSE("\t Not Runnnig\n");
+ } else {
+ __T_VERBOSE("\t Not Scaling\n");
+ }
+
+ if (counts[i].val > max)
+ max = counts[i].val;
+
+ if (counts[i].val < min)
+ min = counts[i].val;
+
+ avg += counts[i].val;
+
+ if (counts[i].val != 0)
+ nonzero++;
+ }
+
+ if (nonzero != 0)
+ avg = avg / nonzero;
+ else
+ avg = 0;
+
+ error = display_error(avg, max, min, expected_counts.val);
+
+ __T("Error out of range!", ((error <= 1.0) && (error >= -1.0)));
+
+ perf_evlist__close(evlist);
+ perf_evlist__delete(evlist);
+
+ perf_thread_map__put(threads);
+
+ return 0;
+}
+
int test_evlist(int argc, char **argv)
{
__T_START;
@@ -424,6 +580,7 @@ int test_evlist(int argc, char **argv)
test_stat_thread_enable();
test_mmap_thread();
test_mmap_cpus();
+ test_stat_multiplexing();
__T_END;
return tests_failed == 0 ? 0 : -1;