From: tip-bot for Arnaldo Carvalho de Melo <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: alexey.budankov@linux.intel.com, mingo@kernel.org, hpa@zytor.com,
jolsa@kernel.org, ak@linux.intel.com,
linux-kernel@vger.kernel.org, sque@chromium.org,
alexander.shishkin@linux.intel.com, chongjiang@chromium.org,
adrian.hunter@intel.com, acme@redhat.com, peterz@infradead.org,
namhyung@kernel.org, tglx@linutronix.de
Subject: [tip:perf/core] perf data: Document clockid header: HEADER_CLOCKID
Date: Mon, 17 Jun 2019 11:56:24 -0700 [thread overview]
Message-ID: <tip-slhnjp06027j3ae17qqetzxj@git.kernel.org> (raw)
Commit-ID: a9de7cfc7663882e98ec3b2ecf35c546a013b956
Gitweb: https://git.kernel.org/tip/a9de7cfc7663882e98ec3b2ecf35c546a013b956
Author: Arnaldo Carvalho de Melo <acme@redhat.com>
AuthorDate: Wed, 29 May 2019 15:43:51 -0300
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Wed, 5 Jun 2019 09:47:53 -0300
perf data: Document clockid header: HEADER_CLOCKID
We forgot to update the perf.data file format document for the
HEADER_CLOCKID header, do it now from comments in the patch introducing
it.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Budankov <alexey.budankov@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Chong Jiang <chongjiang@chromium.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Simon Que <sque@chromium.org>
Fixes: cf7905165fee ("perf record: Encode -k clockid frequency into Perf trace")
Link: https://lkml.kernel.org/n/tip-slhnjp06027j3ae17qqetzxj@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/Documentation/perf.data-file-format.txt | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/tools/perf/Documentation/perf.data-file-format.txt b/tools/perf/Documentation/perf.data-file-format.txt
index 99733751695b..600999f89c6d 100644
--- a/tools/perf/Documentation/perf.data-file-format.txt
+++ b/tools/perf/Documentation/perf.data-file-format.txt
@@ -296,6 +296,12 @@ $ perf report --header-only -I
# memory nodes (nr 1, block size 0x8000000):
# 0 [7G]: 0-23,32-69
+ HEADER_CLOCKID = 23,
+
+One uint64_t for the clockid frequency, specified, for instance, via 'perf
+record -k' (see clock_gettime()), to enable timestamps derived metrics
+conversion into wall clock time on the reporting stage.
+
HEADER_BPF_PROG_INFO = 25,
struct bpf_prog_info_linear, which contains detailed information about
reply other threads:[~2019-06-17 18:56 UTC|newest]
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