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Date: Thu, 2 Apr 2015 21:47:17 +0800
From: Yunlong Song <yunlong.song@...wei.com>
To: <a.p.zijlstra@...llo.nl>, <paulus@...ba.org>, <mingo@...hat.com>,
<acme@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <wangnan0@...wei.com>
Subject: [PATCH 08/10] perf tools: Support using -f to override perf.data file ownership for timechart
Enable perf timechart to use perf.data when it is not owned by current
user or root.
Example:
# perf timechart record ls
# chown Yunlong.Song:Yunlong.Song perf.data
# ls -al perf.data
-rw------- 1 Yunlong.Song Yunlong.Song 5471744 Apr 2 15:15 perf.data
# id
uid=0(root) gid=0(root) groups=0(root),64(pkcs11)
Before this patch:
# perf timechart
File perf.data not owned by current user or root (use -f to override)
# perf timechart -f
Error: unknown switch `f'
usage: perf timechart [<options>] {record}
-i, --input <file> input file name
-o, --output <file> output file name
-w, --width <n> page width
--highlight <duration or task name>
highlight tasks. Pass duration in ns or process name.
-P, --power-only output power data only
-T, --tasks-only output processes data only
-p, --process <process>
process selector. Pass a pid or process name.
--symfs <directory>
Look for files with symbols relative to this directory
-n, --proc-num <n> min. number of tasks to print
-t, --topology sort CPUs according to topology
--io-skip-eagain skip EAGAIN errors
--io-min-time <time>
all IO faster than min-time will visually appear longer
--io-merge-dist <time>
merge events that are merge-dist us apart
As shown above, the -f option does not work at all.
After this patch:
# perf timechart
File perf.data not owned by current user or root (use -f to override)
# perf timechart -f
Written 0.0 seconds of trace to output.svg.
# cat output.svg
<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg SYSTEM "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="1000" height="10110" version="1.1" xmlns="http://www.w3.org/2000/svg">
<defs>
<style type="text/css">
<![CDATA[
rect { stroke-width: 1; }
...
...
As shown above, the -f option really works now.
Signed-off-by: Yunlong Song <yunlong.song@...wei.com>
---
tools/perf/builtin-timechart.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/builtin-timechart.c b/tools/perf/builtin-timechart.c
index 494b3bb..e50fe11 100644
--- a/tools/perf/builtin-timechart.c
+++ b/tools/perf/builtin-timechart.c
@@ -67,6 +67,7 @@ struct timechart {
skip_eagain;
u64 min_time,
merge_dist;
+ bool force;
};
struct per_pidcomm;
@@ -1598,6 +1599,7 @@ static int __cmd_timechart(struct timechart *tchart, const char *output_name)
struct perf_data_file file = {
.path = input_name,
.mode = PERF_DATA_MODE_READ,
+ .force = tchart->force,
};
struct perf_session *session = perf_session__new(&file, false,
@@ -1956,6 +1958,7 @@ int cmd_timechart(int argc, const char **argv,
OPT_CALLBACK(0, "io-merge-dist", &tchart.merge_dist, "time",
"merge events that are merge-dist us apart",
parse_time),
+ OPT_BOOLEAN('f', "force", &tchart.force, "don't complain, do it"),
OPT_END()
};
const char * const timechart_subcommands[] = { "record", NULL };
--
1.8.5.2
--
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