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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 | 155 ++++++++++++++++++++++++ 4 files changed, 158 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 += builtin-test.o perf-test-y += tests-scripts.o perf-test-y += parse-events.o +perf-test-y += uncore-event-sorting.o perf-test-y += dso-data.o perf-test-y += vmlinux-kallsyms.o perf-test-y += openat-syscall.o diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.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[] = { &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); diff --git a/tools/perf/tests/uncore-event-sorting.c b/tools/perf/tests/uncore-event-sorting.c new file mode 100644 index 000000000000..cab5ef49e2be --- /dev/null +++ b/tools/perf/tests/uncore-event-sorting.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) +#include + +#include "debug.h" +#include "evlist.h" +#include "parse-events.h" +#include "pmu.h" +#include "pmus.h" +#include "tests.h" + +struct match_state { + char *event1; + char *event2; +}; + +static char *clean_event_name(struct pmu_event_info *info) +{ + const char *name = info->name; + const char *pmu_name = info->pmu->name; + size_t pmu_len = strlen(pmu_name); + char *res; + size_t len; + + if (!strncmp(name, pmu_name, pmu_len) && name[pmu_len] == '/') + name += pmu_len + 1; + + res = strdup(name); + if (!res) + return NULL; + + len = strlen(res); + if (len > 0 && res[len - 1] == '/') + res[len - 1] = '\0'; + + return res; +} + +static int event_cb(void *state, struct pmu_event_info *info) +{ + struct match_state *m = state; + char *clean_name; + + if (m->event1 && m->event2) + return 1; + + clean_name = clean_event_name(info); + if (!clean_name) + return 0; + + if (!m->event1) { + m->event1 = clean_name; + } else if (!m->event2) { + if (strcmp(m->event1, clean_name)) { + m->event2 = clean_name; + return 1; + } + free(clean_name); + } else { + free(clean_name); + } + return 0; +} + +static int test__uncore_event_sorting(struct test_suite *test __maybe_unused, + int subtest __maybe_unused) +{ + struct evlist *evlist; + struct parse_events_error err; + struct evsel *evsel; + struct perf_pmu *pmu = NULL; + char *pmu_prefix = NULL; + struct match_state m = { NULL, NULL }; + char buf[1024]; + int ret; + + while ((pmu = perf_pmus__scan(pmu)) != NULL) { + size_t len; + struct perf_pmu *sibling; + + if (pmu->is_core) + continue; + + len = pmu_name_len_no_suffix(pmu->name); + if (len == strlen(pmu->name)) + continue; + + sibling = pmu; + while ((sibling = perf_pmus__scan(sibling)) != NULL) { + if (sibling->is_core) + continue; + if (pmu_name_len_no_suffix(sibling->name) == len && + !strncmp(pmu->name, sibling->name, len)) + break; + } + + if (!sibling) + continue; + + m.event1 = m.event2 = NULL; + perf_pmu__for_each_event(pmu, false, &m, event_cb); + + if (m.event1 && m.event2) { + pmu_prefix = strndup(pmu->name, len); + break; + } + free(m.event1); + } + + if (!pmu_prefix) { + pr_debug("No suitable uncore PMU found\n"); + return TEST_SKIP; + } + + evlist = 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 = parse_events(evlist, buf, &err); + if (ret) { + pr_debug("parse_events failed\n"); + ret = TEST_FAIL; + 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) { + struct evsel *next; + + if (!evsel__is_group_leader(evsel)) + continue; + + next = evsel__next(evsel); + TEST_ASSERT_EQUAL("Group size is 2", evsel->core.nr_members, 2); + TEST_ASSERT_VAL("PMU match", evsel->pmu == next->pmu); + TEST_ASSERT_VAL("First event name", strstr(evsel__name(evsel), m.event1) != NULL); + TEST_ASSERT_VAL("Second event name", strstr(evsel__name(next), m.event2) != NULL); + } + ret = TEST_OK; + +out_err: + evlist__delete(evlist); + parse_events_error__exit(&err); + free(pmu_prefix); + free(m.event1); + free(m.event2); + return ret; +} + +DEFINE_SUITE("Uncore event sorting", uncore_event_sorting); -- 2.54.0.563.g4f69b47b94-goog