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perf tests attr: Add test_attr__ready function 

We create many test events before the real ones just to test specific
features. But there's no way for attr tests to separate those test
events from those it needs to check.

Adding 'ready' call from the events open interface to trigger/start
events collection for attr test.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Thomas Richter <tmricht@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20170703145030.12903-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Jiri Olsa 2017-07-03 16:50:18 +02:00 committed by Arnaldo Carvalho de Melo
parent d78ada4a76
commit 10213e2ff2
3 changed files with 15 additions and 0 deletions
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1
tools/perf/perf.h
View File

@ -7,6 +7,7 @@
#include <linux/perf_event.h>
extern bool test_attr__enabled;
void test_attr__ready(void);
void test_attr__init(void);
void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu,
int fd, int group_fd, unsigned long flags);

10
tools/perf/tests/attr.c
View File

@ -36,6 +36,7 @@
#define ENV "PERF_TEST_ATTR"
static char *dir;
static bool ready;
void test_attr__init(void)
{
@ -67,6 +68,9 @@ static int store_event(struct perf_event_attr *attr, pid_t pid, int cpu,
FILE *file;
char path[PATH_MAX];
if (!ready)
return 0;
snprintf(path, PATH_MAX, "%s/event-%d-%llu-%d", dir,
attr->type, attr->config, fd);
@ -144,6 +148,12 @@ void test_attr__open(struct perf_event_attr *attr, pid_t pid, int cpu,
errno = errno_saved;
}
void test_attr__ready(void)
{
if (unlikely(test_attr__enabled) && !ready)
ready = true;
}
static int run_dir(const char *d, const char *perf)
{
char v[] = "-vvvvv";

4
tools/perf/util/evsel.c
View File

@ -58,6 +58,8 @@ static int perf_evsel__no_extra_init(struct perf_evsel *evsel __maybe_unused)
return 0;
}
void __weak test_attr__ready(void) { }
static void perf_evsel__no_extra_fini(struct perf_evsel *evsel __maybe_unused)
{
}
@ -1572,6 +1574,8 @@ retry_open:
pr_debug2("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx",
pid, cpus->map[cpu], group_fd, flags);
test_attr__ready();
fd = sys_perf_event_open(&evsel->attr, pid, cpus->map[cpu],
group_fd, flags);