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Uncore PMUs may have a common prefix, like the PMUs uncore_imc_free_running_0 and uncore_imc_free_running_1 have a prefix of uncore_imc_free_running. Parsing an event group like "{data_read,data_write}" for those PMUs should result with two groups "{uncore_imc_free_running_0/data_read/,uncore_imc_free_running_0/data_write= /}, {uncore_imc_free_running_1/data_read/,uncore_imc_free_running_1/data_write/= }" which means the evsels need resorting as when initially parsed the evsels are ordered with mixed PMUs: "{uncore_imc_free_running_0/data_read/,uncore_imc_free_running_1/data_read/, uncore_imc_free_running_0/data_write/,uncore_imc_free_running_1/data_write/= }". Signed-off-by: Ian Rogers Tested-by: Zide Chen --- tools/perf/tests/Build | 1 + tools/perf/tests/builtin-test.c | 1 + tools/perf/tests/tests.h | 1 + tools/perf/tests/uncore-event-sorting.c | 125 ++++++++++++++++++++++++ 4 files changed, 128 insertions(+) create mode 100644 tools/perf/tests/uncore-event-sorting.c diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build index c2a67ce45941..66944a4f4968 100644 --- a/tools/perf/tests/Build +++ b/tools/perf/tests/Build @@ -3,6 +3,7 @@ perf-test-y +=3D builtin-test.o perf-test-y +=3D tests-scripts.o perf-test-y +=3D parse-events.o +perf-test-y +=3D uncore-event-sorting.o perf-test-y +=3D dso-data.o perf-test-y +=3D vmlinux-kallsyms.o perf-test-y +=3D openat-syscall.o diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-tes= t.c index 06507066213b..f2c135891477 100644 --- a/tools/perf/tests/builtin-test.c +++ b/tools/perf/tests/builtin-test.c @@ -71,6 +71,7 @@ static struct test_suite *generic_tests[] =3D { &suite__basic_mmap, &suite__mem, &suite__parse_events, + &suite__uncore_event_sorting, &suite__expr, &suite__PERF_RECORD, &suite__pmu, diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h index f5f1238d1f7f..ee00518bf36f 100644 --- a/tools/perf/tests/tests.h +++ b/tools/perf/tests/tests.h @@ -177,6 +177,7 @@ DECLARE_SUITE(sigtrap); DECLARE_SUITE(event_groups); DECLARE_SUITE(symbols); DECLARE_SUITE(util); +DECLARE_SUITE(uncore_event_sorting); DECLARE_SUITE(subcmd_help); DECLARE_SUITE(kallsyms_split); =20 diff --git a/tools/perf/tests/uncore-event-sorting.c b/tools/perf/tests/unc= ore-event-sorting.c new file mode 100644 index 000000000000..91e1a580709b --- /dev/null +++ b/tools/perf/tests/uncore-event-sorting.c @@ -0,0 +1,125 @@ +// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) +#include "tests.h" +#include "debug.h" +#include "parse-events.h" +#include "pmu.h" +#include "pmus.h" +#include "evlist.h" +#include + +struct match_state { + char *event1; + char *event2; +}; + +static int event_cb(void *state, struct pmu_event_info *info) +{ + struct match_state *m =3D state; + + if (!m->event1) { + m->event1 =3D strdup(info->name); + } else if (!m->event2) { + if (strcmp(m->event1, info->name)) { + m->event2 =3D strdup(info->name); + return 1; + } + } + return 0; +} + +static int test__uncore_event_sorting(struct test_suite *test __maybe_unus= ed, + int subtest __maybe_unused) +{ + struct evlist *evlist; + struct parse_events_error err; + struct evsel *evsel; + struct perf_pmu *pmu =3D NULL; + char *pmu_prefix =3D NULL; + struct match_state m =3D { NULL, NULL }; + char buf[1024]; + int ret; + + while ((pmu =3D perf_pmus__scan(pmu)) !=3D NULL) { + size_t len; + struct perf_pmu *sibling; + + if (pmu->is_core) + continue; + + len =3D pmu_name_len_no_suffix(pmu->name); + if (len =3D=3D strlen(pmu->name)) + continue; + + sibling =3D pmu; + while ((sibling =3D perf_pmus__scan(sibling)) !=3D NULL) { + if (sibling->is_core) + continue; + if (pmu_name_len_no_suffix(sibling->name) =3D=3D len && + !strncmp(pmu->name, sibling->name, len)) + break; + } + + if (!sibling) + continue; + + m.event1 =3D m.event2 =3D NULL; + perf_pmu__for_each_event(pmu, false, &m, event_cb); + + if (m.event1 && m.event2) { + pmu_prefix =3D strndup(pmu->name, len); + break; + } + free(m.event1); + } + + if (!pmu_prefix) { + pr_debug("No suitable uncore PMU found\n"); + return TEST_SKIP; + } + + evlist =3D evlist__new(); + if (!evlist) + return TEST_FAIL; + + snprintf(buf, sizeof(buf), "{%s/%s/,%s/%s/}", + pmu_prefix, m.event1, pmu_prefix, m.event2); + pr_debug("Parsing: %s\n", buf); + + parse_events_error__init(&err); + ret =3D parse_events(evlist, buf, &err); + if (ret) { + pr_debug("parse_events failed\n"); + goto out_err; + } + + TEST_ASSERT_VAL("Number of events is > 0", evlist->core.nr_entries > 0); + TEST_ASSERT_EQUAL("Number of events is a multiple of 2", evlist->core.nr_= entries % 2, 0); + + evlist__for_each_entry(evlist, evsel) { + if (evsel__is_group_leader(evsel)) { + struct evsel *next =3D evsel__next(evsel); + + TEST_ASSERT_EQUAL("Group size is 2", evsel->core.nr_members, 2); + TEST_ASSERT_VAL("PMU match", evsel->pmu =3D=3D next->pmu); + TEST_ASSERT_VAL("First event name", strstr(evsel->name, m.event1) !=3D = NULL); + TEST_ASSERT_VAL("Second event name", strstr(next->name, m.event2) !=3D = NULL); + } + } + + evlist__delete(evlist); + parse_events_error__exit(&err); + free(pmu_prefix); + free(m.event1); + free(m.event2); + return TEST_OK; + +out_err: + evlist__delete(evlist); + parse_events_error__exit(&err); + free(pmu_prefix); + free(m.event1); + free(m.event2); + return TEST_FAIL; +} + +DEFINE_SUITE("Uncore event sorting", uncore_event_sorting); --=20 2.53.0.1018.g2bb0e51243-goog