lkml.org 
[lkml]   [2018]   [Mar]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 41/54] perf report: Display perf.data header info
Date
From: Jiri Olsa <jolsa@kernel.org>

Display more header info from perf.data file, following values:

$ perf report -i perf.data --header-only
...
# header version : 1
# data offset : 424
# data size : 3364280
# feat offset : 3364704

It's handy for debuging.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20180307155020.32613-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/header.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index a326e0d8b5b6..e0c3cad0fd8d 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -2318,7 +2318,12 @@ int perf_header__fprintf_info(struct perf_session *session, FILE *fp, bool full)
if (ret == -1)
return -1;

- fprintf(fp, "# captured on: %s", ctime(&st.st_ctime));
+ fprintf(fp, "# captured on : %s", ctime(&st.st_ctime));
+
+ fprintf(fp, "# header version : %u\n", header->version);
+ fprintf(fp, "# data offset : %" PRIu64 "\n", header->data_offset);
+ fprintf(fp, "# data size : %" PRIu64 "\n", header->data_size);
+ fprintf(fp, "# feat offset : %" PRIu64 "\n", header->feat_offset);

perf_header__process_sections(header, fd, &hd,
perf_file_section__fprintf_info);
--
2.14.3
\
 
 \ /
  Last update: 2018-03-08 20:57    [W:0.151 / U:4.788 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site