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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>
This commit is contained in:
Shunsuke Nakamura
Arnaldo Carvalho de Melo
parent
f2c4dcf191
commit
a7f3713f6b
@ -21,6 +21,9 @@
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#include "tests.h"
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#include <internal/evsel.h>
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#define EVENT_NUM 15
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#define WAIT_COUNT 100000000UL
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static int libperf_print(enum libperf_print_level level,
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const char *fmt, va_list ap)
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{
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@ -413,6 +416,159 @@ static int test_mmap_cpus(void)
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return 0;
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}
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static double display_error(long long average,
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long long high,
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long long low,
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long long expected)
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{
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double error;
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error = (((double)average - expected) / expected) * 100.0;
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__T_VERBOSE(" Expected: %lld\n", expected);
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__T_VERBOSE(" High: %lld Low: %lld Average: %lld\n",
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high, low, average);
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__T_VERBOSE(" Average Error = %.2f%%\n", error);
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return error;
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}
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static int test_stat_multiplexing(void)
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{
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struct perf_counts_values expected_counts = { .val = 0 };
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struct perf_counts_values counts[EVENT_NUM] = {{ .val = 0 },};
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struct perf_thread_map *threads;
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struct perf_evlist *evlist;
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struct perf_evsel *evsel;
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struct perf_event_attr attr = {
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.type = PERF_TYPE_HARDWARE,
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.config = PERF_COUNT_HW_INSTRUCTIONS,
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.read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
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PERF_FORMAT_TOTAL_TIME_RUNNING,
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.disabled = 1,
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};
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int err, i, nonzero = 0;
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unsigned long count;
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long long max = 0, min = 0, avg = 0;
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double error = 0.0;
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s8 scaled = 0;
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/* read for non-multiplexing event count */
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threads = perf_thread_map__new_dummy();
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__T("failed to create threads", threads);
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perf_thread_map__set_pid(threads, 0, 0);
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evsel = perf_evsel__new(&attr);
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__T("failed to create evsel", evsel);
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err = perf_evsel__open(evsel, NULL, threads);
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__T("failed to open evsel", err == 0);
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err = perf_evsel__enable(evsel);
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__T("failed to enable evsel", err == 0);
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/* wait loop */
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count = WAIT_COUNT;
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while (count--)
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;
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perf_evsel__read(evsel, 0, 0, &expected_counts);
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__T("failed to read value for evsel", expected_counts.val != 0);
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__T("failed to read non-multiplexing event count",
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expected_counts.ena == expected_counts.run);
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err = perf_evsel__disable(evsel);
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__T("failed to enable evsel", err == 0);
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perf_evsel__close(evsel);
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perf_evsel__delete(evsel);
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perf_thread_map__put(threads);
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/* read for multiplexing event count */
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threads = perf_thread_map__new_dummy();
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__T("failed to create threads", threads);
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perf_thread_map__set_pid(threads, 0, 0);
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evlist = perf_evlist__new();
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__T("failed to create evlist", evlist);
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for (i = 0; i < EVENT_NUM; i++) {
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evsel = perf_evsel__new(&attr);
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__T("failed to create evsel", evsel);
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perf_evlist__add(evlist, evsel);
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}
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perf_evlist__set_maps(evlist, NULL, threads);
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err = perf_evlist__open(evlist);
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__T("failed to open evsel", err == 0);
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perf_evlist__enable(evlist);
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/* wait loop */
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count = WAIT_COUNT;
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while (count--)
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;
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i = 0;
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perf_evlist__for_each_evsel(evlist, evsel) {
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perf_evsel__read(evsel, 0, 0, &counts[i]);
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__T("failed to read value for evsel", counts[i].val != 0);
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i++;
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}
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perf_evlist__disable(evlist);
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min = counts[0].val;
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for (i = 0; i < EVENT_NUM; i++) {
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__T_VERBOSE("Event %2d -- Raw count = %lu, run = %lu, enable = %lu\n",
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i, counts[i].val, counts[i].run, counts[i].ena);
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perf_counts_values__scale(&counts[i], true, &scaled);
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if (scaled == 1) {
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__T_VERBOSE("\t Scaled count = %lu (%.2lf%%, %lu/%lu)\n",
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counts[i].val,
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(double)counts[i].run / (double)counts[i].ena * 100.0,
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counts[i].run, counts[i].ena);
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} else if (scaled == -1) {
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__T_VERBOSE("\t Not Runnnig\n");
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} else {
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__T_VERBOSE("\t Not Scaling\n");
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}
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if (counts[i].val > max)
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max = counts[i].val;
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if (counts[i].val < min)
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min = counts[i].val;
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avg += counts[i].val;
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if (counts[i].val != 0)
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nonzero++;
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}
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if (nonzero != 0)
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avg = avg / nonzero;
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else
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avg = 0;
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error = display_error(avg, max, min, expected_counts.val);
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__T("Error out of range!", ((error <= 1.0) && (error >= -1.0)));
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perf_evlist__close(evlist);
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perf_evlist__delete(evlist);
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perf_thread_map__put(threads);
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return 0;
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}
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int test_evlist(int argc, char **argv)
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{
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__T_START;
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@ -424,6 +580,7 @@ int test_evlist(int argc, char **argv)
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test_stat_thread_enable();
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test_mmap_thread();
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test_mmap_cpus();
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test_stat_multiplexing();
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__T_END;
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return tests_failed == 0 ? 0 : -1;
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