Commit a6c925fd authored by John Garry's avatar John Garry Committed by Arnaldo Carvalho de Melo

perf test: Add pmu-events test

The initial test will verify that the test tables in generated pmu-events.c
match against known, expected values.

For known events added in pmu-events/arch/test, we need to add an entry
in test_cpu_aliases_events[] or test_uncore_events[].

A sample run is as follows for x86:

  john@linux-3c19:~/linux> tools/perf/perf test -vv 10
  10: PMU event aliases                                     :
  --- start ---
  test child forked, pid 5316
  testing event table bp_l1_btb_correct: pass
  testing event table bp_l2_btb_correct: pass
  testing event table segment_reg_loads.any: pass
  testing event table dispatch_blocked.any: pass
  testing event table eist_trans: pass
  testing event table uncore_hisi_ddrc.flux_wcmd: pass
  testing event table unc_cbo_xsnp_response.miss_eviction: pass
  test child finished with 0
  ---- end ----
  PMU event aliases: Ok
Signed-off-by: default avatarJohn Garry <john.garry@huawei.com>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: default avatarJiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: James Clark <james.clark@arm.com>
Cc: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will@kernel.org>
Cc: linuxarm@huawei.com
[ Fixup test_cpu_events[] and test_uncore_events[] sentinels to initialize one of its members to NULL, fixing the build in older compilers ]
Link: http://lore.kernel.org/lkml/1584442939-8911-5-git-send-email-john.garry@huawei.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent e45ad701
......@@ -14,6 +14,7 @@ perf-y += evsel-roundtrip-name.o
perf-y += evsel-tp-sched.o
perf-y += fdarray.o
perf-y += pmu.o
perf-y += pmu-events.o
perf-y += hists_common.o
perf-y += hists_link.o
perf-y += hists_filter.o
......
......@@ -72,6 +72,10 @@ static struct test generic_tests[] = {
.desc = "Parse perf pmu format",
.func = test__pmu,
},
{
.desc = "PMU events",
.func = test__pmu_events,
},
{
.desc = "DSO data read",
.func = test__dso_data,
......
// SPDX-License-Identifier: GPL-2.0
#include "parse-events.h"
#include "pmu.h"
#include "tests.h"
#include <errno.h>
#include <stdio.h>
#include <linux/kernel.h>
#include "debug.h"
#include "../pmu-events/pmu-events.h"
struct perf_pmu_test_event {
struct pmu_event event;
};
static struct perf_pmu_test_event test_cpu_events[] = {
{
.event = {
.name = "bp_l1_btb_correct",
.event = "event=0x8a",
.desc = "L1 BTB Correction",
.topic = "branch",
},
},
{
.event = {
.name = "bp_l2_btb_correct",
.event = "event=0x8b",
.desc = "L2 BTB Correction",
.topic = "branch",
},
},
{
.event = {
.name = "segment_reg_loads.any",
.event = "umask=0x80,period=200000,event=0x6",
.desc = "Number of segment register loads",
.topic = "other",
},
},
{
.event = {
.name = "dispatch_blocked.any",
.event = "umask=0x20,period=200000,event=0x9",
.desc = "Memory cluster signals to block micro-op dispatch for any reason",
.topic = "other",
},
},
{
.event = {
.name = "eist_trans",
.event = "umask=0x0,period=200000,event=0x3a",
.desc = "Number of Enhanced Intel SpeedStep(R) Technology (EIST) transitions",
.topic = "other",
},
},
{ /* sentinel */
.event = {
.name = NULL,
},
},
};
static struct perf_pmu_test_event test_uncore_events[] = {
{
.event = {
.name = "uncore_hisi_ddrc.flux_wcmd",
.event = "event=0x2",
.desc = "DDRC write commands. Unit: hisi_sccl,ddrc ",
.topic = "uncore",
.long_desc = "DDRC write commands",
.pmu = "hisi_sccl,ddrc",
},
},
{
.event = {
.name = "unc_cbo_xsnp_response.miss_eviction",
.event = "umask=0x81,event=0x22",
.desc = "Unit: uncore_cbox A cross-core snoop resulted from L3 Eviction which misses in some processor core",
.topic = "uncore",
.long_desc = "A cross-core snoop resulted from L3 Eviction which misses in some processor core",
.pmu = "uncore_cbox",
},
},
{ /* sentinel */
.event = {
.name = NULL,
},
}
};
const int total_test_events_size = ARRAY_SIZE(test_uncore_events);
static bool is_same(const char *reference, const char *test)
{
if (!reference && !test)
return true;
if (reference && !test)
return false;
if (!reference && test)
return false;
return !strcmp(reference, test);
}
static struct pmu_events_map *__test_pmu_get_events_map(void)
{
struct pmu_events_map *map;
for (map = &pmu_events_map[0]; map->cpuid; map++) {
if (!strcmp(map->cpuid, "testcpu"))
return map;
}
pr_err("could not find test events map\n");
return NULL;
}
/* Verify generated events from pmu-events.c is as expected */
static int __test_pmu_event_table(void)
{
struct pmu_events_map *map = __test_pmu_get_events_map();
struct pmu_event *table;
int map_events = 0, expected_events;
/* ignore 2x sentinels */
expected_events = ARRAY_SIZE(test_cpu_events) +
ARRAY_SIZE(test_uncore_events) - 2;
if (!map)
return -1;
for (table = map->table; table->name; table++) {
struct perf_pmu_test_event *test;
struct pmu_event *te;
bool found = false;
if (table->pmu)
test = &test_uncore_events[0];
else
test = &test_cpu_events[0];
te = &test->event;
for (; te->name; test++, te = &test->event) {
if (strcmp(table->name, te->name))
continue;
found = true;
map_events++;
if (!is_same(table->desc, te->desc)) {
pr_debug2("testing event table %s: mismatched desc, %s vs %s\n",
table->name, table->desc, te->desc);
return -1;
}
if (!is_same(table->topic, te->topic)) {
pr_debug2("testing event table %s: mismatched topic, %s vs %s\n",
table->name, table->topic,
te->topic);
return -1;
}
if (!is_same(table->long_desc, te->long_desc)) {
pr_debug2("testing event table %s: mismatched long_desc, %s vs %s\n",
table->name, table->long_desc,
te->long_desc);
return -1;
}
if (!is_same(table->unit, te->unit)) {
pr_debug2("testing event table %s: mismatched unit, %s vs %s\n",
table->name, table->unit,
te->unit);
return -1;
}
if (!is_same(table->perpkg, te->perpkg)) {
pr_debug2("testing event table %s: mismatched perpkg, %s vs %s\n",
table->name, table->perpkg,
te->perpkg);
return -1;
}
if (!is_same(table->metric_expr, te->metric_expr)) {
pr_debug2("testing event table %s: mismatched metric_expr, %s vs %s\n",
table->name, table->metric_expr,
te->metric_expr);
return -1;
}
if (!is_same(table->metric_name, te->metric_name)) {
pr_debug2("testing event table %s: mismatched metric_name, %s vs %s\n",
table->name, table->metric_name,
te->metric_name);
return -1;
}
if (!is_same(table->deprecated, te->deprecated)) {
pr_debug2("testing event table %s: mismatched deprecated, %s vs %s\n",
table->name, table->deprecated,
te->deprecated);
return -1;
}
pr_debug("testing event table %s: pass\n", table->name);
}
if (!found) {
pr_err("testing event table: could not find event %s\n",
table->name);
return -1;
}
}
if (map_events != expected_events) {
pr_err("testing event table: found %d, but expected %d\n",
map_events, expected_events);
return -1;
}
return 0;
}
int test__pmu_events(struct test *test __maybe_unused,
int subtest __maybe_unused)
{
if (__test_pmu_event_table())
return -1;
return 0;
}
......@@ -49,6 +49,7 @@ int test__perf_evsel__roundtrip_name_test(struct test *test, int subtest);
int test__perf_evsel__tp_sched_test(struct test *test, int subtest);
int test__syscall_openat_tp_fields(struct test *test, int subtest);
int test__pmu(struct test *test, int subtest);
int test__pmu_events(struct test *test, int subtest);
int test__attr(struct test *test, int subtest);
int test__dso_data(struct test *test, int subtest);
int test__dso_data_cache(struct test *test, int subtest);
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment