From 0a507af9c681ac2adedc5fe1b2d534e27be85446 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Tue, 2 Jun 2020 23:47:40 +0200 Subject: perf tests: Add parse metric test for ipc metric Adding new test that process metrics code and checks the expected results. Starting with easy ipc metric. Committer testing: # perf test "Parse and process metrics" 67: Parse and process metrics : Ok # # perf test -v "Parse and process metrics" 67: Parse and process metrics : --- start --- test child forked, pid 103402 metric expr inst_retired.any / cpu_clk_unhalted.thread for IPC found event inst_retired.any found event cpu_clk_unhalted.thread adding {inst_retired.any,cpu_clk_unhalted.thread}:W test child finished with 0 ---- end ---- Parse and process metrics: Ok # Had to fix it to initialize that 'struct value' array sentinel with a named initializer to fix the build with some versions of clang: tests/parse-metric.c:135:7: error: missing field 'val' initializer [-Werror,-Wmissing-field-initializers] { 0 }, Signed-off-by: Jiri Olsa Acked-by: Ian Rogers Tested-by: Arnaldo Carvalho de Melo Cc: Alexander Shishkin Cc: Andi Kleen Cc: Michael Petlan Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lore.kernel.org/lkml/20200602214741.1218986-13-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/tests/parse-metric.c | 145 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 145 insertions(+) create mode 100644 tools/perf/tests/parse-metric.c (limited to 'tools/perf/tests/parse-metric.c') diff --git a/tools/perf/tests/parse-metric.c b/tools/perf/tests/parse-metric.c new file mode 100644 index 000000000000..79d956dc6a74 --- /dev/null +++ b/tools/perf/tests/parse-metric.c @@ -0,0 +1,145 @@ +// SPDX-License-Identifier: GPL-2.0 +#include +#include +#include +#include +#include "metricgroup.h" +#include "tests.h" +#include "pmu-events/pmu-events.h" +#include "evlist.h" +#include "rblist.h" +#include "debug.h" +#include "expr.h" +#include "stat.h" + +static struct pmu_event pme_test[] = { +{ + .metric_expr = "inst_retired.any / cpu_clk_unhalted.thread", + .metric_name = "IPC", +}, +}; + +static struct pmu_events_map map = { + .cpuid = "test", + .version = "1", + .type = "core", + .table = pme_test, +}; + +struct value { + const char *event; + u64 val; +}; + +static u64 find_value(const char *name, struct value *values) +{ + struct value *v = values; + + while (v->event) { + if (!strcmp(name, v->event)) + return v->val; + v++; + }; + return 0; +} + +static void load_runtime_stat(struct runtime_stat *st, struct evlist *evlist, + struct value *vals) +{ + struct evsel *evsel; + u64 count; + + evlist__for_each_entry(evlist, evsel) { + count = find_value(evsel->name, vals); + perf_stat__update_shadow_stats(evsel, count, 0, st); + } +} + +static double compute_single(struct rblist *metric_events, struct evlist *evlist, + struct runtime_stat *st) +{ + struct evsel *evsel = evlist__first(evlist); + struct metric_event *me; + + me = metricgroup__lookup(metric_events, evsel, false); + if (me != NULL) { + struct metric_expr *mexp; + + mexp = list_first_entry(&me->head, struct metric_expr, nd); + return test_generic_metric(mexp, 0, st); + } + return 0.; +} + +static int compute_metric(const char *name, struct value *vals, double *ratio) +{ + struct rblist metric_events = { + .nr_entries = 0, + }; + struct perf_cpu_map *cpus; + struct runtime_stat st; + struct evlist *evlist; + int err; + + /* + * We need to prepare evlist for stat mode running on CPU 0 + * because that's where all the stats are going to be created. + */ + evlist = evlist__new(); + if (!evlist) + return -ENOMEM; + + cpus = perf_cpu_map__new("0"); + if (!cpus) + return -ENOMEM; + + perf_evlist__set_maps(&evlist->core, cpus, NULL); + + /* Parse the metric into metric_events list. */ + err = metricgroup__parse_groups_test(evlist, &map, name, + false, false, + &metric_events); + + TEST_ASSERT_VAL("failed to parse metric", err == 0); + + if (perf_evlist__alloc_stats(evlist, false)) + return -1; + + /* Load the runtime stats with given numbers for events. */ + runtime_stat__init(&st); + load_runtime_stat(&st, evlist, vals); + + /* And execute the metric */ + *ratio = compute_single(&metric_events, evlist, &st); + + /* ... clenup. */ + metricgroup__rblist_exit(&metric_events); + runtime_stat__exit(&st); + perf_evlist__free_stats(evlist); + perf_cpu_map__put(cpus); + evlist__delete(evlist); + return 0; +} + +static int test_ipc(void) +{ + double ratio; + struct value vals[] = { + { .event = "inst_retired.any", .val = 300 }, + { .event = "cpu_clk_unhalted.thread", .val = 200 }, + { .event = NULL, }, + }; + + TEST_ASSERT_VAL("failed to compute metric", + compute_metric("IPC", vals, &ratio) == 0); + + TEST_ASSERT_VAL("IPC failed, wrong ratio", + ratio == 1.5); + return 0; +} + +int test__parse_metric(struct test *test __maybe_unused, int subtest __maybe_unused) +{ + TEST_ASSERT_VAL("IPC failed", test_ipc() == 0); + return 0; +} -- cgit v1.2.3