From: James Clark <james.clark@arm.com>
To: linux-perf-users@vger.kernel.org, tanmay@marvell.com,
leo.yan@linaro.org, mike.leach@linaro.org
Cc: sgoutham@marvell.com, gcherian@marvell.com, lcherian@marvell.com,
bbhushan2@marvell.com, German Gomez <german.gomez@arm.com>,
James Clark <james.clark@arm.com>,
Mathieu Poirier <mathieu.poirier@linaro.org>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
John Garry <john.g.garry@oracle.com>,
Will Deacon <will@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v5 4/8] perf pmu: Add function to check if a pmu file exists
Date: Fri, 20 Jan 2023 14:36:57 +0000 [thread overview]
Message-ID: <20230120143702.4035046-5-james.clark@arm.com> (raw)
In-Reply-To: <20230120143702.4035046-1-james.clark@arm.com>
From: German Gomez <german.gomez@arm.com>
Add a utility function perf_pmu__file_exists() to check if a given pmu
file exists in the sysfs filesystem.
Signed-off-by: German Gomez <german.gomez@arm.com>
Signed-off-by: James Clark <james.clark@arm.com>
---
tools/perf/util/pmu.c | 10 ++++++++++
tools/perf/util/pmu.h | 2 ++
2 files changed, 12 insertions(+)
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 23e1d70fa343..8abf5b8439a7 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -1742,6 +1742,16 @@ int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt,
return ret;
}
+bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name)
+{
+ char path[PATH_MAX];
+
+ if (!perf_pmu__pathname_scnprintf(path, sizeof(path), pmu->name, name))
+ return false;
+
+ return file_available(path);
+}
+
static int perf_pmu__new_caps(struct list_head *list, char *name, char *value)
{
struct perf_pmu_caps *caps = zalloc(sizeof(*caps));
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 742d4db319a0..2bdc560f19c7 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -230,6 +230,8 @@ bool pmu_have_event(const char *pname, const char *name);
int perf_pmu__scan_file(struct perf_pmu *pmu, const char *name, const char *fmt, ...) __scanf(3, 4);
+bool perf_pmu__file_exists(struct perf_pmu *pmu, const char *name);
+
int perf_pmu__test(void);
struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu);
--
2.25.1
next prev parent reply other threads:[~2023-01-20 14:40 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-20 14:36 [PATCH v5 0/8] perf cs_etm: Basic support for virtual/kernel timestamps James Clark
2023-01-20 14:36 ` [PATCH v5 1/8] perf: Remove duplication around EVENT_SOURCE_DEVICE_PATH James Clark
2023-01-20 14:36 ` [PATCH v5 2/8] perf: Use perf_pmu__open_file() and perf_pmu__scan_file() James Clark
2023-01-20 17:21 ` Arnaldo Carvalho de Melo
2023-01-20 17:32 ` Arnaldo Carvalho de Melo
2023-01-20 17:43 ` Arnaldo Carvalho de Melo
2023-01-23 10:36 ` James Clark
2023-01-20 14:36 ` [PATCH v5 3/8] perf: Remove remaining duplication of bus/event_source/devices/ James Clark
2023-01-20 14:36 ` James Clark [this message]
2023-01-20 14:36 ` [PATCH v5 5/8] perf cs_etm: Keep separate symbols for ETMv4 and ETE parameters James Clark
2023-01-20 14:36 ` [PATCH v5 6/8] perf cs_etm: Record ts_source in AUXTRACE_INFO for ETMv4 and ETE James Clark
2023-01-20 14:37 ` [PATCH v5 7/8] perf cs_etm: Set the time field in the synthetic samples James Clark
2023-01-20 14:37 ` [PATCH v5 8/8] perf: cs-etm: Ensure that Coresight timestamps don't go backwards James Clark
2023-01-20 17:12 ` Arnaldo Carvalho de Melo
2023-01-23 10:37 ` James Clark
2023-01-20 14:42 ` [PATCH v5 0/8] perf cs_etm: Basic support for virtual/kernel timestamps Suzuki K Poulose
2023-01-20 17:44 ` Tanmay Jagdale
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