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perf test: Add expand cgroup event test

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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>
This commit is contained in:
Namhyung Kim 2020-09-24 21:44:55 +09:00 committed by Arnaldo Carvalho de Melo
parent 89fb1ca2ab
commit 40b74c30ff
4 changed files with 247 additions and 0 deletions
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1
tools/perf/tests/Build
View File

@ -61,6 +61,7 @@ perf-y += demangle-java-test.o
perf-y += pfm.o
perf-y += parse-metric.o
perf-y += pe-file-parsing.o
perf-y += expand-cgroup.o
$(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build
$(call rule_mkdir)

4
tools/perf/tests/builtin-test.c
View File

@ -345,6 +345,10 @@ static struct test generic_tests[] = {
.desc = "PE file support",
.func = test__pe_file_parsing,
},
{
.desc = "Event expansion for cgroups",
.func = test__expand_cgroup_events,
},
{
.func = NULL,
},

241
tools/perf/tests/expand-cgroup.c Normal file
View File

@ -0,0 +1,241 @@
// SPDX-License-Identifier: GPL-2.0
#include "tests.h"
#include "debug.h"
#include "evlist.h"
#include "cgroup.h"
#include "rblist.h"
#include "metricgroup.h"
#include "parse-events.h"
#include "pmu-events/pmu-events.h"
#include "pfm.h"
#include <subcmd/parse-options.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static int test_expand_events(struct evlist *evlist,
struct rblist *metric_events)
{
int i, ret = TEST_FAIL;
int nr_events;
bool was_group_event;
int nr_members; /* for the first evsel only */
const char cgrp_str[] = "A,B,C";
const char *cgrp_name[] = { "A", "B", "C" };
int nr_cgrps = ARRAY_SIZE(cgrp_name);
char **ev_name;
struct evsel *evsel;
TEST_ASSERT_VAL("evlist is empty", !perf_evlist__empty(evlist));
nr_events = evlist->core.nr_entries;
ev_name = calloc(nr_events, sizeof(*ev_name));
if (ev_name == NULL) {
pr_debug("memory allocation failure\n");
return TEST_FAIL;
}
i = 0;
evlist__for_each_entry(evlist, evsel) {
ev_name[i] = strdup(evsel->name);
if (ev_name[i] == NULL) {
pr_debug("memory allocation failure\n");
goto out;
}
i++;
}
/* remember grouping info */
was_group_event = evsel__is_group_event(evlist__first(evlist));
nr_members = evlist__first(evlist)->core.nr_members;
ret = evlist__expand_cgroup(evlist, cgrp_str, metric_events, false);
if (ret < 0) {
pr_debug("failed to expand events for cgroups\n");
goto out;
}
ret = TEST_FAIL;
if (evlist->core.nr_entries != nr_events * nr_cgrps) {
pr_debug("event count doesn't match\n");
goto out;
}
i = 0;
evlist__for_each_entry(evlist, evsel) {
if (strcmp(evsel->name, ev_name[i % nr_events])) {
pr_debug("event name doesn't match:\n");
pr_debug(" evsel[%d]: %s\n expected: %s\n",
i, evsel->name, ev_name[i % nr_events]);
goto out;
}
if (strcmp(evsel->cgrp->name, cgrp_name[i / nr_events])) {
pr_debug("cgroup name doesn't match:\n");
pr_debug(" evsel[%d]: %s\n expected: %s\n",
i, evsel->cgrp->name, cgrp_name[i / nr_events]);
goto out;
}
if ((i % nr_events) == 0) {
if (evsel__is_group_event(evsel) != was_group_event) {
pr_debug("event group doesn't match: got %s, expect %s\n",
evsel__is_group_event(evsel) ? "true" : "false",
was_group_event ? "true" : "false");
goto out;
}
if (evsel->core.nr_members != nr_members) {
pr_debug("event group member doesn't match: %d vs %d\n",
evsel->core.nr_members, nr_members);
goto out;
}
}
i++;
}
ret = TEST_OK;
out: for (i = 0; i < nr_events; i++)
free(ev_name[i]);
free(ev_name);
return ret;
}
static int expand_default_events(void)
{
int ret;
struct evlist *evlist;
struct rblist metric_events;
evlist = perf_evlist__new_default();
TEST_ASSERT_VAL("failed to get evlist", evlist);
rblist__init(&metric_events);
ret = test_expand_events(evlist, &metric_events);
evlist__delete(evlist);
return ret;
}
static int expand_group_events(void)
{
int ret;
struct evlist *evlist;
struct rblist metric_events;
struct parse_events_error err;
const char event_str[] = "{cycles,instructions}";
symbol_conf.event_group = true;
evlist = evlist__new();
TEST_ASSERT_VAL("failed to get evlist", evlist);
ret = parse_events(evlist, event_str, &err);
if (ret < 0) {
pr_debug("failed to parse event '%s', err %d, str '%s'\n",
event_str, ret, err.str);
parse_events_print_error(&err, event_str);
goto out;
}
rblist__init(&metric_events);
ret = test_expand_events(evlist, &metric_events);
out:
evlist__delete(evlist);
return ret;
}
static int expand_libpfm_events(void)
{
int ret;
struct evlist *evlist;
struct rblist metric_events;
const char event_str[] = "UNHALTED_CORE_CYCLES";
struct option opt = {
.value = &evlist,
};
symbol_conf.event_group = true;
evlist = evlist__new();
TEST_ASSERT_VAL("failed to get evlist", evlist);
ret = parse_libpfm_events_option(&opt, event_str, 0);
if (ret < 0) {
pr_debug("failed to parse libpfm event '%s', err %d\n",
event_str, ret);
goto out;
}
if (perf_evlist__empty(evlist)) {
pr_debug("libpfm was not enabled\n");
goto out;
}
rblist__init(&metric_events);
ret = test_expand_events(evlist, &metric_events);
out:
evlist__delete(evlist);
return ret;
}
static int expand_metric_events(void)
{
int ret;
struct evlist *evlist;
struct rblist metric_events;
const char metric_str[] = "CPI";
struct pmu_event pme_test[] = {
{
.metric_expr = "instructions / cycles",
.metric_name = "IPC",
},
{
.metric_expr = "1 / IPC",
.metric_name = "CPI",
},
{
.metric_expr = NULL,
.metric_name = NULL,
},
};
struct pmu_events_map ev_map = {
.cpuid = "test",
.version = "1",
.type = "core",
.table = pme_test,
};
evlist = evlist__new();
TEST_ASSERT_VAL("failed to get evlist", evlist);
rblist__init(&metric_events);
ret = metricgroup__parse_groups_test(evlist, &ev_map, metric_str,
false, false, &metric_events);
if (ret < 0) {
pr_debug("failed to parse '%s' metric\n", metric_str);
goto out;
}
ret = test_expand_events(evlist, &metric_events);
out:
metricgroup__rblist_exit(&metric_events);
evlist__delete(evlist);
return ret;
}
int test__expand_cgroup_events(struct test *test __maybe_unused,
int subtest __maybe_unused)
{
int ret;
ret = expand_default_events();
TEST_ASSERT_EQUAL("failed to expand default events", ret, 0);
ret = expand_group_events();
TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
ret = expand_libpfm_events();
TEST_ASSERT_EQUAL("failed to expand event group", ret, 0);
ret = expand_metric_events();
TEST_ASSERT_EQUAL("failed to expand metric events", ret, 0);
return ret;
}

1
tools/perf/tests/tests.h
View File

@ -123,6 +123,7 @@ const char *test__pfm_subtest_get_desc(int subtest);
int test__pfm_subtest_get_nr(void);
int test__parse_metric(struct test *test, int subtest);
int test__pe_file_parsing(struct test *test, int subtest);
int test__expand_cgroup_events(struct test *test, int subtest);
bool test__bp_signal_is_supported(void);
bool test__bp_account_is_supported(void);