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Diffstat (limited to 'tools/perf/util/pmu.c')
-rw-r--r--tools/perf/util/pmu.c34
1 files changed, 11 insertions, 23 deletions
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index e8d348988026..8b99fd312aae 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -24,6 +24,7 @@
#include "pmu-events/pmu-events.h"
#include "string2.h"
#include "strbuf.h"
+#include "fncache.h"
struct perf_pmu_format {
char *name;
@@ -82,7 +83,6 @@ int perf_pmu__format_parse(char *dir, struct list_head *head)
*/
static int pmu_format(const char *name, struct list_head *format)
{
- struct stat st;
char path[PATH_MAX];
const char *sysfs = sysfs__mountpoint();
@@ -92,8 +92,8 @@ static int pmu_format(const char *name, struct list_head *format)
snprintf(path, PATH_MAX,
"%s" EVENT_SOURCE_DEVICE_PATH "%s/format", sysfs, name);
- if (stat(path, &st) < 0)
- return 0; /* no error if format does not exist */
+ if (!file_available(path))
+ return 0;
if (perf_pmu__format_parse(path, format))
return -1;
@@ -475,7 +475,6 @@ static int pmu_aliases_parse(char *dir, struct list_head *head)
*/
static int pmu_aliases(const char *name, struct list_head *head)
{
- struct stat st;
char path[PATH_MAX];
const char *sysfs = sysfs__mountpoint();
@@ -485,8 +484,8 @@ static int pmu_aliases(const char *name, struct list_head *head)
snprintf(path, PATH_MAX,
"%s/bus/event_source/devices/%s/events", sysfs, name);
- if (stat(path, &st) < 0)
- return 0; /* no error if 'events' does not exist */
+ if (!file_available(path))
+ return 0;
if (pmu_aliases_parse(path, head))
return -1;
@@ -525,7 +524,6 @@ static int pmu_alias_terms(struct perf_pmu_alias *alias,
*/
static int pmu_type(const char *name, __u32 *type)
{
- struct stat st;
char path[PATH_MAX];
FILE *file;
int ret = 0;
@@ -537,7 +535,7 @@ static int pmu_type(const char *name, __u32 *type)
snprintf(path, PATH_MAX,
"%s" EVENT_SOURCE_DEVICE_PATH "%s/type", sysfs, name);
- if (stat(path, &st) < 0)
+ if (access(path, R_OK) < 0)
return -1;
file = fopen(path, "r");
@@ -628,14 +626,11 @@ static struct perf_cpu_map *pmu_cpumask(const char *name)
static bool pmu_is_uncore(const char *name)
{
char path[PATH_MAX];
- struct perf_cpu_map *cpus;
- const char *sysfs = sysfs__mountpoint();
+ const char *sysfs;
+ sysfs = sysfs__mountpoint();
snprintf(path, PATH_MAX, CPUS_TEMPLATE_UNCORE, sysfs, name);
- cpus = __pmu_cpumask(path);
- perf_cpu_map__put(cpus);
-
- return !!cpus;
+ return file_available(path);
}
/*
@@ -645,7 +640,6 @@ static bool pmu_is_uncore(const char *name)
*/
static int is_arm_pmu_core(const char *name)
{
- struct stat st;
char path[PATH_MAX];
const char *sysfs = sysfs__mountpoint();
@@ -655,10 +649,7 @@ static int is_arm_pmu_core(const char *name)
/* Look for cpu sysfs (specific to arm) */
scnprintf(path, PATH_MAX, "%s/bus/event_source/devices/%s/cpus",
sysfs, name);
- if (stat(path, &st) == 0)
- return 1;
-
- return 0;
+ return file_available(path);
}
static char *perf_pmu__getcpuid(struct perf_pmu *pmu)
@@ -1544,7 +1535,6 @@ bool pmu_have_event(const char *pname, const char *name)
static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
{
- struct stat st;
char path[PATH_MAX];
const char *sysfs;
@@ -1554,10 +1544,8 @@ static FILE *perf_pmu__open_file(struct perf_pmu *pmu, const char *name)
snprintf(path, PATH_MAX,
"%s" EVENT_SOURCE_DEVICE_PATH "%s/%s", sysfs, pmu->name, name);
-
- if (stat(path, &st) < 0)
+ if (!file_available(path))
return NULL;
-
return fopen(path, "r");
}