From: Jiri Olsa <jolsa@kernel.org>
To: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: lkml <linux-kernel@vger.kernel.org>,
Ingo Molnar <mingo@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Jonas Rabenstein <jonas.rabenstein@studium.uni-erlangen.de>,
Nageswara R Sastry <nasastry@in.ibm.com>,
Ravi Bangoria <ravi.bangoria@linux.ibm.com>,
Andi Kleen <ak@linux.intel.com>
Subject: [PATCH 4/8] perf tools: Read and store caps/max_precise in perf_pmu
Date: Tue, 5 Mar 2019 16:25:32 +0100 [thread overview]
Message-ID: <20190305152536.21035-5-jolsa@kernel.org> (raw)
In-Reply-To: <20190305152536.21035-1-jolsa@kernel.org>
Read the caps/max_precise value and store it in struct
perf_pmu to be used when setting the maximum precise_ip
field in following patch.
Link: http://lkml.kernel.org/n/tip-y47h37fzs5t8hy9t0j5g9pyj@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
tools/perf/util/pmu.c | 14 ++++++++++++++
tools/perf/util/pmu.h | 1 +
2 files changed, 15 insertions(+)
diff --git a/tools/perf/util/pmu.c b/tools/perf/util/pmu.c
index 51d437f55d18..6199a3174ab9 100644
--- a/tools/perf/util/pmu.c
+++ b/tools/perf/util/pmu.c
@@ -752,6 +752,19 @@ perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused)
return NULL;
}
+static int pmu_max_precise(const char *name)
+{
+ char path[PATH_MAX];
+ int max_precise = -1;
+
+ scnprintf(path, PATH_MAX,
+ "bus/event_source/devices/%s/caps/max_precise",
+ name);
+
+ sysfs__read_int(path, &max_precise);
+ return max_precise;
+}
+
static struct perf_pmu *pmu_lookup(const char *name)
{
struct perf_pmu *pmu;
@@ -784,6 +797,7 @@ static struct perf_pmu *pmu_lookup(const char *name)
pmu->name = strdup(name);
pmu->type = type;
pmu->is_uncore = pmu_is_uncore(name);
+ pmu->max_precise = pmu_max_precise(name);
pmu_add_cpu_aliases(&aliases, pmu);
INIT_LIST_HEAD(&pmu->format);
diff --git a/tools/perf/util/pmu.h b/tools/perf/util/pmu.h
index 47253c3daf55..bd9ec2704a57 100644
--- a/tools/perf/util/pmu.h
+++ b/tools/perf/util/pmu.h
@@ -26,6 +26,7 @@ struct perf_pmu {
__u32 type;
bool selectable;
bool is_uncore;
+ int max_precise;
struct perf_event_attr *default_config;
struct cpu_map *cpus;
struct list_head format; /* HEAD struct perf_pmu_format -> list */
--
2.17.2
next prev parent reply other threads:[~2019-03-05 15:25 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-03-05 15:25 [PATCH 0/8] perf tools: Assorted fixes Jiri Olsa
2019-03-05 15:25 ` [PATCH 1/8] perf c2c: Fix c2c report for empty numa node Jiri Olsa
2019-03-09 20:05 ` [tip:perf/urgent] " tip-bot for Jiri Olsa
2019-03-05 15:25 ` [PATCH 2/8] perf tools: Add error path into hist_entry__init Jiri Olsa
2019-03-09 20:06 ` [tip:perf/urgent] perf hist: " tip-bot for Jiri Olsa
2019-03-05 15:25 ` [PATCH 3/8] perf hist: Fix memory leak of srcline Jiri Olsa
2019-03-09 20:07 ` [tip:perf/urgent] " tip-bot for Jiri Olsa
2019-03-05 15:25 ` Jiri Olsa [this message]
2019-03-09 20:07 ` [tip:perf/urgent] perf tools: Read and store caps/max_precise in perf_pmu tip-bot for Jiri Olsa
2019-03-05 15:25 ` [PATCH 5/8] perf tools: Get precise_ip from the pmu config Jiri Olsa
2019-03-05 16:13 ` Andi Kleen
2019-03-05 16:28 ` Jiri Olsa
2019-03-05 16:40 ` Andi Kleen
2019-03-07 15:35 ` [PATCHv2 " Jiri Olsa
2019-03-07 16:51 ` Andi Kleen
2019-03-07 22:32 ` Jiri Olsa
2019-03-14 14:01 ` Jiri Olsa
2019-03-14 15:49 ` Andi Kleen
2019-03-15 12:15 ` [PATCH] perf tools: Move precise_ip detection into perf_evsel__open Jiri Olsa
2019-03-15 14:05 ` Andi Kleen
2019-03-15 14:35 ` Arnaldo Carvalho de Melo
2019-03-15 14:52 ` Jiri Olsa
2019-03-23 15:04 ` Jiri Olsa
2019-03-25 14:53 ` Arnaldo Carvalho de Melo
2019-03-05 15:25 ` [PATCH 6/8] perf tools: Probe for precise_ip with simple attr Jiri Olsa
2019-03-09 20:08 ` [tip:perf/urgent] perf evsel: " tip-bot for Jiri Olsa
2019-03-05 15:25 ` [PATCH 7/8] perf tools: Fix double free in perf_data__close Jiri Olsa
2019-03-09 20:09 ` [tip:perf/urgent] perf session: " tip-bot for Jiri Olsa
2019-03-05 15:25 ` [PATCH 8/8] perf tools: Force perf_data__open|close zero data->file.path Jiri Olsa
2019-03-09 20:09 ` [tip:perf/urgent] perf data: " tip-bot for Jiri Olsa
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