perf tests: Add a test case for hists filtering
Now we have changed how hists stats are accounted especially when filter(s) applied. So add a test case to verify it. Signed-off-by: Namhyung Kim <namhyung@kernel.org> Link: http://lkml.kernel.org/r/1398396494-12811-2-git-send-email-namhyung@kernel.org Signed-off-by: Jiri Olsa <jolsa@kernel.org>hifive-unleashed-5.1
Namhyung Kim
Jiri Olsa
parent
6e344a952d
commit
3c3cfd99c8
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@ -399,6 +399,7 @@ LIB_OBJS += $(OUTPUT)tests/evsel-tp-sched.o
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LIB_OBJS += $(OUTPUT)tests/pmu.o
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LIB_OBJS += $(OUTPUT)tests/hists_common.o
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LIB_OBJS += $(OUTPUT)tests/hists_link.o
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LIB_OBJS += $(OUTPUT)tests/hists_filter.o
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LIB_OBJS += $(OUTPUT)tests/python-use.o
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LIB_OBJS += $(OUTPUT)tests/bp_signal.o
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LIB_OBJS += $(OUTPUT)tests/bp_signal_overflow.o
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@ -123,6 +123,10 @@ static struct test {
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},
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#endif
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#endif
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{
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.desc = "Test filtering hist entries",
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.func = test__hists_filter,
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},
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{
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.func = NULL,
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},
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@ -0,0 +1,315 @@
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#include "perf.h"
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#include "util/debug.h"
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#include "util/symbol.h"
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#include "util/sort.h"
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#include "util/evsel.h"
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#include "util/evlist.h"
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#include "util/machine.h"
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#include "util/thread.h"
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#include "util/parse-events.h"
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#include "tests/tests.h"
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#include "tests/hists_common.h"
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struct sample {
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u32 pid;
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u64 ip;
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struct thread *thread;
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struct map *map;
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struct symbol *sym;
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};
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/* For the numbers, see hists_common.c */
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static struct sample fake_samples[] = {
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/* perf [kernel] schedule() */
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{ .pid = 100, .ip = 0xf0000 + 700, },
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/* perf [perf] main() */
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{ .pid = 100, .ip = 0x40000 + 700, },
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/* perf [libc] malloc() */
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{ .pid = 100, .ip = 0x50000 + 700, },
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/* perf [perf] main() */
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{ .pid = 200, .ip = 0x40000 + 700, }, /* will be merged */
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/* perf [perf] cmd_record() */
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{ .pid = 200, .ip = 0x40000 + 900, },
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/* perf [kernel] page_fault() */
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{ .pid = 200, .ip = 0xf0000 + 800, },
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/* bash [bash] main() */
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{ .pid = 300, .ip = 0x40000 + 700, },
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/* bash [bash] xmalloc() */
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{ .pid = 300, .ip = 0x40000 + 800, },
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/* bash [libc] malloc() */
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{ .pid = 300, .ip = 0x50000 + 700, },
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/* bash [kernel] page_fault() */
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{ .pid = 300, .ip = 0xf0000 + 800, },
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};
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static int add_hist_entries(struct perf_evlist *evlist, struct machine *machine)
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{
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struct perf_evsel *evsel;
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struct addr_location al;
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struct hist_entry *he;
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struct perf_sample sample = { .cpu = 0, };
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size_t i;
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/*
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* each evsel will have 10 samples but the 4th sample
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* (perf [perf] main) will be collapsed to an existing entry
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* so total 9 entries will be in the tree.
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*/
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evlist__for_each(evlist, evsel) {
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for (i = 0; i < ARRAY_SIZE(fake_samples); i++) {
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const union perf_event event = {
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.header = {
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.misc = PERF_RECORD_MISC_USER,
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},
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};
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/* make sure it has no filter at first */
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evsel->hists.thread_filter = NULL;
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evsel->hists.dso_filter = NULL;
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evsel->hists.symbol_filter_str = NULL;
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sample.pid = fake_samples[i].pid;
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sample.ip = fake_samples[i].ip;
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if (perf_event__preprocess_sample(&event, machine, &al,
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&sample) < 0)
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goto out;
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he = __hists__add_entry(&evsel->hists, &al, NULL,
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NULL, NULL, 100, 1, 0);
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if (he == NULL)
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goto out;
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fake_samples[i].thread = al.thread;
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fake_samples[i].map = al.map;
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fake_samples[i].sym = al.sym;
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hists__inc_nr_events(he->hists, PERF_RECORD_SAMPLE);
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if (!he->filtered)
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he->hists->stats.nr_non_filtered_samples++;
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}
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}
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return 0;
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out:
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pr_debug("Not enough memory for adding a hist entry\n");
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return TEST_FAIL;
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}
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static void print_hists(struct hists *hists)
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{
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int i = 0;
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struct rb_root *root;
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struct rb_node *node;
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root = &hists->entries;
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pr_info("----- %s --------\n", __func__);
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node = rb_first(root);
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while (node) {
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struct hist_entry *he;
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he = rb_entry(node, struct hist_entry, rb_node);
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if (!he->filtered) {
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pr_info("%2d: entry: %-8s [%-8s] %20s: period = %"PRIu64"\n",
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i, thread__comm_str(he->thread),
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he->ms.map->dso->short_name,
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he->ms.sym->name, he->stat.period);
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}
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i++;
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node = rb_next(node);
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}
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}
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int test__hists_filter(void)
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{
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int err = TEST_FAIL;
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struct machines machines;
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struct machine *machine;
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struct perf_evsel *evsel;
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struct perf_evlist *evlist = perf_evlist__new();
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TEST_ASSERT_VAL("No memory", evlist);
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err = parse_events(evlist, "cpu-clock");
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if (err)
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goto out;
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err = parse_events(evlist, "task-clock");
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if (err)
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goto out;
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/* default sort order (comm,dso,sym) will be used */
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if (setup_sorting() < 0)
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goto out;
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machines__init(&machines);
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/* setup threads/dso/map/symbols also */
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machine = setup_fake_machine(&machines);
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if (!machine)
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goto out;
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if (verbose > 1)
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machine__fprintf(machine, stderr);
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/* process sample events */
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err = add_hist_entries(evlist, machine);
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if (err < 0)
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goto out;
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evlist__for_each(evlist, evsel) {
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struct hists *hists = &evsel->hists;
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hists__collapse_resort(hists, NULL);
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hists__output_resort(hists);
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if (verbose > 2) {
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pr_info("Normal histogram\n");
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print_hists(hists);
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}
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TEST_ASSERT_VAL("Invalid nr samples",
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hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
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TEST_ASSERT_VAL("Invalid nr hist entries",
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hists->nr_entries == 9);
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TEST_ASSERT_VAL("Invalid total period",
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hists->stats.total_period == 1000);
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TEST_ASSERT_VAL("Unmatched nr samples",
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hists->stats.nr_events[PERF_RECORD_SAMPLE] ==
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hists->stats.nr_non_filtered_samples);
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TEST_ASSERT_VAL("Unmatched nr hist entries",
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hists->nr_entries == hists->nr_non_filtered_entries);
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TEST_ASSERT_VAL("Unmatched total period",
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hists->stats.total_period ==
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hists->stats.total_non_filtered_period);
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/* now applying thread filter for 'bash' */
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evsel->hists.thread_filter = fake_samples[9].thread;
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hists__filter_by_thread(hists);
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if (verbose > 2) {
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pr_info("Histogram for thread filter\n");
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print_hists(hists);
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}
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/* normal stats should be invariant */
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TEST_ASSERT_VAL("Invalid nr samples",
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hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
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TEST_ASSERT_VAL("Invalid nr hist entries",
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hists->nr_entries == 9);
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TEST_ASSERT_VAL("Invalid total period",
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hists->stats.total_period == 1000);
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/* but filter stats are changed */
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TEST_ASSERT_VAL("Unmatched nr samples for thread filter",
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hists->stats.nr_non_filtered_samples == 4);
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TEST_ASSERT_VAL("Unmatched nr hist entries for thread filter",
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hists->nr_non_filtered_entries == 4);
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TEST_ASSERT_VAL("Unmatched total period for thread filter",
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hists->stats.total_non_filtered_period == 400);
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/* remove thread filter first */
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evsel->hists.thread_filter = NULL;
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hists__filter_by_thread(hists);
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/* now applying dso filter for 'kernel' */
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evsel->hists.dso_filter = fake_samples[0].map->dso;
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hists__filter_by_dso(hists);
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if (verbose > 2) {
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pr_info("Histogram for dso filter\n");
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print_hists(hists);
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}
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/* normal stats should be invariant */
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TEST_ASSERT_VAL("Invalid nr samples",
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hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
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TEST_ASSERT_VAL("Invalid nr hist entries",
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hists->nr_entries == 9);
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TEST_ASSERT_VAL("Invalid total period",
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hists->stats.total_period == 1000);
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/* but filter stats are changed */
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TEST_ASSERT_VAL("Unmatched nr samples for dso filter",
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hists->stats.nr_non_filtered_samples == 3);
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TEST_ASSERT_VAL("Unmatched nr hist entries for dso filter",
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hists->nr_non_filtered_entries == 3);
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TEST_ASSERT_VAL("Unmatched total period for dso filter",
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hists->stats.total_non_filtered_period == 300);
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/* remove dso filter first */
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evsel->hists.dso_filter = NULL;
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hists__filter_by_dso(hists);
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/*
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* now applying symbol filter for 'main'. Also note that
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* there's 3 samples that have 'main' symbol but the 4th
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* entry of fake_samples was collapsed already so it won't
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* be counted as a separate entry but the sample count and
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* total period will be remained.
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*/
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evsel->hists.symbol_filter_str = "main";
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hists__filter_by_symbol(hists);
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if (verbose > 2) {
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pr_info("Histogram for symbol filter\n");
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print_hists(hists);
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}
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/* normal stats should be invariant */
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TEST_ASSERT_VAL("Invalid nr samples",
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hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
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TEST_ASSERT_VAL("Invalid nr hist entries",
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hists->nr_entries == 9);
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TEST_ASSERT_VAL("Invalid total period",
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hists->stats.total_period == 1000);
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/* but filter stats are changed */
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TEST_ASSERT_VAL("Unmatched nr samples for symbol filter",
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hists->stats.nr_non_filtered_samples == 3);
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TEST_ASSERT_VAL("Unmatched nr hist entries for symbol filter",
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hists->nr_non_filtered_entries == 2);
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TEST_ASSERT_VAL("Unmatched total period for symbol filter",
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hists->stats.total_non_filtered_period == 300);
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/* now applying all filters at once. */
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evsel->hists.thread_filter = fake_samples[1].thread;
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evsel->hists.dso_filter = fake_samples[1].map->dso;
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hists__filter_by_thread(hists);
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hists__filter_by_dso(hists);
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if (verbose > 2) {
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pr_info("Histogram for all filters\n");
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print_hists(hists);
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}
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/* normal stats should be invariant */
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TEST_ASSERT_VAL("Invalid nr samples",
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hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
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TEST_ASSERT_VAL("Invalid nr hist entries",
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hists->nr_entries == 9);
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TEST_ASSERT_VAL("Invalid total period",
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hists->stats.total_period == 1000);
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/* but filter stats are changed */
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TEST_ASSERT_VAL("Unmatched nr samples for all filter",
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hists->stats.nr_non_filtered_samples == 2);
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TEST_ASSERT_VAL("Unmatched nr hist entries for all filter",
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hists->nr_non_filtered_entries == 1);
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TEST_ASSERT_VAL("Unmatched total period for all filter",
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hists->stats.total_non_filtered_period == 200);
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}
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err = TEST_OK;
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out:
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/* tear down everything */
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perf_evlist__delete(evlist);
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machines__exit(&machines);
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return err;
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}
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@ -41,6 +41,7 @@ int test__sample_parsing(void);
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int test__keep_tracking(void);
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int test__parse_no_sample_id_all(void);
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int test__dwarf_unwind(void);
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int test__hists_filter(void);
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#if defined(__x86_64__) || defined(__i386__)
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#ifdef HAVE_DWARF_UNWIND_SUPPORT
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