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perf tests: Add a test case for hists filtering

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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>
This commit is contained in:
Namhyung Kim 2014-04-25 12:28:14 +09:00 committed by Jiri Olsa
parent 6e344a952d
commit 3c3cfd99c8
4 changed files with 321 additions and 0 deletions
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1
tools/perf/Makefile.perf
View file

@ -399,6 +399,7 @@ LIB_OBJS += $(OUTPUT)tests/evsel-tp-sched.o
LIB_OBJS += $(OUTPUT)tests/pmu.o
LIB_OBJS += $(OUTPUT)tests/hists_common.o
LIB_OBJS += $(OUTPUT)tests/hists_link.o
LIB_OBJS += $(OUTPUT)tests/hists_filter.o
LIB_OBJS += $(OUTPUT)tests/python-use.o
LIB_OBJS += $(OUTPUT)tests/bp_signal.o
LIB_OBJS += $(OUTPUT)tests/bp_signal_overflow.o

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

@ -123,6 +123,10 @@ static struct test {
},
#endif
#endif
{
.desc = "Test filtering hist entries",
.func = test__hists_filter,
},
{
.func = NULL,
},

315
tools/perf/tests/hists_filter.c Normal file
View file

@ -0,0 +1,315 @@
#include "perf.h"
#include "util/debug.h"
#include "util/symbol.h"
#include "util/sort.h"
#include "util/evsel.h"
#include "util/evlist.h"
#include "util/machine.h"
#include "util/thread.h"
#include "util/parse-events.h"
#include "tests/tests.h"
#include "tests/hists_common.h"
struct sample {
u32 pid;
u64 ip;
struct thread *thread;
struct map *map;
struct symbol *sym;
};
/* For the numbers, see hists_common.c */
static struct sample fake_samples[] = {
/* perf [kernel] schedule() */
{ .pid = 100, .ip = 0xf0000 + 700, },
/* perf [perf] main() */
{ .pid = 100, .ip = 0x40000 + 700, },
/* perf [libc] malloc() */
{ .pid = 100, .ip = 0x50000 + 700, },
/* perf [perf] main() */
{ .pid = 200, .ip = 0x40000 + 700, }, /* will be merged */
/* perf [perf] cmd_record() */
{ .pid = 200, .ip = 0x40000 + 900, },
/* perf [kernel] page_fault() */
{ .pid = 200, .ip = 0xf0000 + 800, },
/* bash [bash] main() */
{ .pid = 300, .ip = 0x40000 + 700, },
/* bash [bash] xmalloc() */
{ .pid = 300, .ip = 0x40000 + 800, },
/* bash [libc] malloc() */
{ .pid = 300, .ip = 0x50000 + 700, },
/* bash [kernel] page_fault() */
{ .pid = 300, .ip = 0xf0000 + 800, },
};
static int add_hist_entries(struct perf_evlist *evlist, struct machine *machine)
{
struct perf_evsel *evsel;
struct addr_location al;
struct hist_entry *he;
struct perf_sample sample = { .cpu = 0, };
size_t i;
/*
* each evsel will have 10 samples but the 4th sample
* (perf [perf] main) will be collapsed to an existing entry
* so total 9 entries will be in the tree.
*/
evlist__for_each(evlist, evsel) {
for (i = 0; i < ARRAY_SIZE(fake_samples); i++) {
const union perf_event event = {
.header = {
.misc = PERF_RECORD_MISC_USER,
},
};
/* make sure it has no filter at first */
evsel->hists.thread_filter = NULL;
evsel->hists.dso_filter = NULL;
evsel->hists.symbol_filter_str = NULL;
sample.pid = fake_samples[i].pid;
sample.ip = fake_samples[i].ip;
if (perf_event__preprocess_sample(&event, machine, &al,
&sample) < 0)
goto out;
he = __hists__add_entry(&evsel->hists, &al, NULL,
NULL, NULL, 100, 1, 0);
if (he == NULL)
goto out;
fake_samples[i].thread = al.thread;
fake_samples[i].map = al.map;
fake_samples[i].sym = al.sym;
hists__inc_nr_events(he->hists, PERF_RECORD_SAMPLE);
if (!he->filtered)
he->hists->stats.nr_non_filtered_samples++;
}
}
return 0;
out:
pr_debug("Not enough memory for adding a hist entry\n");
return TEST_FAIL;
}
static void print_hists(struct hists *hists)
{
int i = 0;
struct rb_root *root;
struct rb_node *node;
root = &hists->entries;
pr_info("----- %s --------\n", __func__);
node = rb_first(root);
while (node) {
struct hist_entry *he;
he = rb_entry(node, struct hist_entry, rb_node);
if (!he->filtered) {
pr_info("%2d: entry: %-8s [%-8s] %20s: period = %"PRIu64"\n",
i, thread__comm_str(he->thread),
he->ms.map->dso->short_name,
he->ms.sym->name, he->stat.period);
}
i++;
node = rb_next(node);
}
}
int test__hists_filter(void)
{
int err = TEST_FAIL;
struct machines machines;
struct machine *machine;
struct perf_evsel *evsel;
struct perf_evlist *evlist = perf_evlist__new();
TEST_ASSERT_VAL("No memory", evlist);
err = parse_events(evlist, "cpu-clock");
if (err)
goto out;
err = parse_events(evlist, "task-clock");
if (err)
goto out;
/* default sort order (comm,dso,sym) will be used */
if (setup_sorting() < 0)
goto out;
machines__init(&machines);
/* setup threads/dso/map/symbols also */
machine = setup_fake_machine(&machines);
if (!machine)
goto out;
if (verbose > 1)
machine__fprintf(machine, stderr);
/* process sample events */
err = add_hist_entries(evlist, machine);
if (err < 0)
goto out;
evlist__for_each(evlist, evsel) {
struct hists *hists = &evsel->hists;
hists__collapse_resort(hists, NULL);
hists__output_resort(hists);
if (verbose > 2) {
pr_info("Normal histogram\n");
print_hists(hists);
}
TEST_ASSERT_VAL("Invalid nr samples",
hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
TEST_ASSERT_VAL("Invalid nr hist entries",
hists->nr_entries == 9);
TEST_ASSERT_VAL("Invalid total period",
hists->stats.total_period == 1000);
TEST_ASSERT_VAL("Unmatched nr samples",
hists->stats.nr_events[PERF_RECORD_SAMPLE] ==
hists->stats.nr_non_filtered_samples);
TEST_ASSERT_VAL("Unmatched nr hist entries",
hists->nr_entries == hists->nr_non_filtered_entries);
TEST_ASSERT_VAL("Unmatched total period",
hists->stats.total_period ==
hists->stats.total_non_filtered_period);
/* now applying thread filter for 'bash' */
evsel->hists.thread_filter = fake_samples[9].thread;
hists__filter_by_thread(hists);
if (verbose > 2) {
pr_info("Histogram for thread filter\n");
print_hists(hists);
}
/* normal stats should be invariant */
TEST_ASSERT_VAL("Invalid nr samples",
hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
TEST_ASSERT_VAL("Invalid nr hist entries",
hists->nr_entries == 9);
TEST_ASSERT_VAL("Invalid total period",
hists->stats.total_period == 1000);
/* but filter stats are changed */
TEST_ASSERT_VAL("Unmatched nr samples for thread filter",
hists->stats.nr_non_filtered_samples == 4);
TEST_ASSERT_VAL("Unmatched nr hist entries for thread filter",
hists->nr_non_filtered_entries == 4);
TEST_ASSERT_VAL("Unmatched total period for thread filter",
hists->stats.total_non_filtered_period == 400);
/* remove thread filter first */
evsel->hists.thread_filter = NULL;
hists__filter_by_thread(hists);
/* now applying dso filter for 'kernel' */
evsel->hists.dso_filter = fake_samples[0].map->dso;
hists__filter_by_dso(hists);
if (verbose > 2) {
pr_info("Histogram for dso filter\n");
print_hists(hists);
}
/* normal stats should be invariant */
TEST_ASSERT_VAL("Invalid nr samples",
hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
TEST_ASSERT_VAL("Invalid nr hist entries",
hists->nr_entries == 9);
TEST_ASSERT_VAL("Invalid total period",
hists->stats.total_period == 1000);
/* but filter stats are changed */
TEST_ASSERT_VAL("Unmatched nr samples for dso filter",
hists->stats.nr_non_filtered_samples == 3);
TEST_ASSERT_VAL("Unmatched nr hist entries for dso filter",
hists->nr_non_filtered_entries == 3);
TEST_ASSERT_VAL("Unmatched total period for dso filter",
hists->stats.total_non_filtered_period == 300);
/* remove dso filter first */
evsel->hists.dso_filter = NULL;
hists__filter_by_dso(hists);
/*
* now applying symbol filter for 'main'. Also note that
* there's 3 samples that have 'main' symbol but the 4th
* entry of fake_samples was collapsed already so it won't
* be counted as a separate entry but the sample count and
* total period will be remained.
*/
evsel->hists.symbol_filter_str = "main";
hists__filter_by_symbol(hists);
if (verbose > 2) {
pr_info("Histogram for symbol filter\n");
print_hists(hists);
}
/* normal stats should be invariant */
TEST_ASSERT_VAL("Invalid nr samples",
hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
TEST_ASSERT_VAL("Invalid nr hist entries",
hists->nr_entries == 9);
TEST_ASSERT_VAL("Invalid total period",
hists->stats.total_period == 1000);
/* but filter stats are changed */
TEST_ASSERT_VAL("Unmatched nr samples for symbol filter",
hists->stats.nr_non_filtered_samples == 3);
TEST_ASSERT_VAL("Unmatched nr hist entries for symbol filter",
hists->nr_non_filtered_entries == 2);
TEST_ASSERT_VAL("Unmatched total period for symbol filter",
hists->stats.total_non_filtered_period == 300);
/* now applying all filters at once. */
evsel->hists.thread_filter = fake_samples[1].thread;
evsel->hists.dso_filter = fake_samples[1].map->dso;
hists__filter_by_thread(hists);
hists__filter_by_dso(hists);
if (verbose > 2) {
pr_info("Histogram for all filters\n");
print_hists(hists);
}
/* normal stats should be invariant */
TEST_ASSERT_VAL("Invalid nr samples",
hists->stats.nr_events[PERF_RECORD_SAMPLE] == 10);
TEST_ASSERT_VAL("Invalid nr hist entries",
hists->nr_entries == 9);
TEST_ASSERT_VAL("Invalid total period",
hists->stats.total_period == 1000);
/* but filter stats are changed */
TEST_ASSERT_VAL("Unmatched nr samples for all filter",
hists->stats.nr_non_filtered_samples == 2);
TEST_ASSERT_VAL("Unmatched nr hist entries for all filter",
hists->nr_non_filtered_entries == 1);
TEST_ASSERT_VAL("Unmatched total period for all filter",
hists->stats.total_non_filtered_period == 200);
}
err = TEST_OK;
out:
/* tear down everything */
perf_evlist__delete(evlist);
machines__exit(&machines);
return err;
}

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

@ -41,6 +41,7 @@ int test__sample_parsing(void);
int test__keep_tracking(void);
int test__parse_no_sample_id_all(void);
int test__dwarf_unwind(void);
int test__hists_filter(void);
#if defined(__x86_64__) || defined(__i386__)
#ifdef HAVE_DWARF_UNWIND_SUPPORT