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perf test: Add expand cgroup event test
It'll expand given events for cgroups A, B and C. $ perf test -v expansion 69: Event expansion for cgroups : --- start --- test child forked, pid 983140 metric expr 1 / IPC for CPI metric expr instructions / cycles for IPC found event instructions found event cycles adding {instructions,cycles}:W copying metric event for cgroup 'A': instructions (idx=0) copying metric event for cgroup 'B': instructions (idx=0) copying metric event for cgroup 'C': instructions (idx=0) test child finished with 0 ---- end ---- Event expansion for cgroups: Ok Signed-off-by: Namhyung Kim <namhyung@kernel.org> Acked-by: Jiri Olsa <jolsa@redhat.com> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: John Garry <john.garry@huawei.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lore.kernel.org/lkml/20200924124455.336326-6-namhyung@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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@ -61,6 +61,7 @@ perf-y += demangle-java-test.o
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perf-y += pfm.o
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perf-y += parse-metric.o
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perf-y += pe-file-parsing.o
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perf-y += expand-cgroup.o
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$(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
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$(call rule_mkdir)
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@ -345,6 +345,10 @@ static struct test generic_tests[] = {
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.desc = "PE file support",
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.func = test__pe_file_parsing,
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},
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{
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.desc = "Event expansion for cgroups",
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.func = test__expand_cgroup_events,
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},
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{
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.func = NULL,
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},
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241
tools/perf/tests/expand-cgroup.c
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241
tools/perf/tests/expand-cgroup.c
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@ -0,0 +1,241 @@
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// SPDX-License-Identifier: GPL-2.0
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#include "tests.h"
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#include "debug.h"
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#include "evlist.h"
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#include "cgroup.h"
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#include "rblist.h"
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#include "metricgroup.h"
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#include "parse-events.h"
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#include "pmu-events/pmu-events.h"
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#include "pfm.h"
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#include <subcmd/parse-options.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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static int test_expand_events(struct evlist *evlist,
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struct rblist *metric_events)
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{
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int i, ret = TEST_FAIL;
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int nr_events;
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bool was_group_event;
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int nr_members; /* for the first evsel only */
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const char cgrp_str[] = "A,B,C";
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const char *cgrp_name[] = { "A", "B", "C" };
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int nr_cgrps = ARRAY_SIZE(cgrp_name);
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char **ev_name;
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struct evsel *evsel;
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TEST_ASSERT_VAL("evlist is empty", !perf_evlist__empty(evlist));
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nr_events = evlist->core.nr_entries;
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ev_name = calloc(nr_events, sizeof(*ev_name));
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if (ev_name == NULL) {
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pr_debug("memory allocation failure\n");
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return TEST_FAIL;
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}
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i = 0;
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evlist__for_each_entry(evlist, evsel) {
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ev_name[i] = strdup(evsel->name);
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if (ev_name[i] == NULL) {
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pr_debug("memory allocation failure\n");
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goto out;
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}
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i++;
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}
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/* remember grouping info */
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was_group_event = evsel__is_group_event(evlist__first(evlist));
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nr_members = evlist__first(evlist)->core.nr_members;
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ret = evlist__expand_cgroup(evlist, cgrp_str, metric_events, false);
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if (ret < 0) {
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pr_debug("failed to expand events for cgroups\n");
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goto out;
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}
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ret = TEST_FAIL;
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if (evlist->core.nr_entries != nr_events * nr_cgrps) {
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pr_debug("event count doesn't match\n");
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goto out;
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}
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i = 0;
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evlist__for_each_entry(evlist, evsel) {
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if (strcmp(evsel->name, ev_name[i % nr_events])) {
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pr_debug("event name doesn't match:\n");
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pr_debug(" evsel[%d]: %s\n expected: %s\n",
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i, evsel->name, ev_name[i % nr_events]);
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goto out;
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}
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if (strcmp(evsel->cgrp->name, cgrp_name[i / nr_events])) {
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pr_debug("cgroup name doesn't match:\n");
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pr_debug(" evsel[%d]: %s\n expected: %s\n",
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i, evsel->cgrp->name, cgrp_name[i / nr_events]);
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goto out;
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}
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if ((i % nr_events) == 0) {
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if (evsel__is_group_event(evsel) != was_group_event) {
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pr_debug("event group doesn't match: got %s, expect %s\n",
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evsel__is_group_event(evsel) ? "true" : "false",
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was_group_event ? "true" : "false");
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goto out;
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}
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if (evsel->core.nr_members != nr_members) {
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pr_debug("event group member doesn't match: %d vs %d\n",
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evsel->core.nr_members, nr_members);
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goto out;
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}
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}
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i++;
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}
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ret = TEST_OK;
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out: for (i = 0; i < nr_events; i++)
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free(ev_name[i]);
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free(ev_name);
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return ret;
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}
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static int expand_default_events(void)
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{
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int ret;
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struct evlist *evlist;
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struct rblist metric_events;
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evlist = perf_evlist__new_default();
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TEST_ASSERT_VAL("failed to get evlist", evlist);
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rblist__init(&metric_events);
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ret = test_expand_events(evlist, &metric_events);
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evlist__delete(evlist);
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return ret;
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}
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static int expand_group_events(void)
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{
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int ret;
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struct evlist *evlist;
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struct rblist metric_events;
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struct parse_events_error err;
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const char event_str[] = "{cycles,instructions}";
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symbol_conf.event_group = true;
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evlist = evlist__new();
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TEST_ASSERT_VAL("failed to get evlist", evlist);
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ret = parse_events(evlist, event_str, &err);
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if (ret < 0) {
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pr_debug("failed to parse event '%s', err %d, str '%s'\n",
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event_str, ret, err.str);
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parse_events_print_error(&err, event_str);
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goto out;
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}
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rblist__init(&metric_events);
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ret = test_expand_events(evlist, &metric_events);
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out:
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evlist__delete(evlist);
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return ret;
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}
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static int expand_libpfm_events(void)
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{
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int ret;
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struct evlist *evlist;
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struct rblist metric_events;
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const char event_str[] = "UNHALTED_CORE_CYCLES";
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struct option opt = {
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.value = &evlist,
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};
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symbol_conf.event_group = true;
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evlist = evlist__new();
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TEST_ASSERT_VAL("failed to get evlist", evlist);
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ret = parse_libpfm_events_option(&opt, event_str, 0);
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if (ret < 0) {
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pr_debug("failed to parse libpfm event '%s', err %d\n",
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event_str, ret);
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goto out;
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}
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if (perf_evlist__empty(evlist)) {
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pr_debug("libpfm was not enabled\n");
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goto out;
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}
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rblist__init(&metric_events);
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ret = test_expand_events(evlist, &metric_events);
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out:
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evlist__delete(evlist);
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return ret;
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}
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static int expand_metric_events(void)
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{
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int ret;
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struct evlist *evlist;
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struct rblist metric_events;
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const char metric_str[] = "CPI";
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struct pmu_event pme_test[] = {
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{
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.metric_expr = "instructions / cycles",
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.metric_name = "IPC",
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},
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{
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.metric_expr = "1 / IPC",
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.metric_name = "CPI",
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},
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{
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.metric_expr = NULL,
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.metric_name = NULL,
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},
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};
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struct pmu_events_map ev_map = {
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.cpuid = "test",
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.version = "1",
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.type = "core",
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.table = pme_test,
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};
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evlist = evlist__new();
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TEST_ASSERT_VAL("failed to get evlist", evlist);
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rblist__init(&metric_events);
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ret = metricgroup__parse_groups_test(evlist, &ev_map, metric_str,
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false, false, &metric_events);
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if (ret < 0) {
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pr_debug("failed to parse '%s' metric\n", metric_str);
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goto out;
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}
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ret = test_expand_events(evlist, &metric_events);
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out:
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metricgroup__rblist_exit(&metric_events);
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evlist__delete(evlist);
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return ret;
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}
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int test__expand_cgroup_events(struct test *test __maybe_unused,
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int subtest __maybe_unused)
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{
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int ret;
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ret = expand_default_events();
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TEST_ASSERT_EQUAL("failed to expand default events", ret, 0);
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ret = expand_group_events();
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TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
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ret = expand_libpfm_events();
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TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
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ret = expand_metric_events();
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TEST_ASSERT_EQUAL("failed to expand metric events", ret, 0);
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return ret;
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}
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@ -123,6 +123,7 @@ const char *test__pfm_subtest_get_desc(int subtest);
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int test__pfm_subtest_get_nr(void);
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int test__parse_metric(struct test *test, int subtest);
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int test__pe_file_parsing(struct test *test, int subtest);
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int test__expand_cgroup_events(struct test *test, int subtest);
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bool test__bp_signal_is_supported(void);
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bool test__bp_account_is_supported(void);
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