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author | Jiri Olsa <jolsa@kernel.org> | 2019-02-20 15:27:57 +0300 |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2019-02-20 22:15:35 +0300 |
commit | 6ef362fd3cf3af5d8143a07b4ea20499bf2a9eec (patch) | |
tree | 7298e3ac3146176b3a9378b4c95cd713b28393c2 /tools/perf/Documentation/perf-script.txt | |
parent | 6e7e8b9fec45f7bef11a5d9d2dd9febe439d4047 (diff) | |
download | linux-6ef362fd3cf3af5d8143a07b4ea20499bf2a9eec.tar.xz |
perf script: Allow +- operator for type specific fields option
Add support to add/remove fields for specific event types in -F option.
It's now possible to use '+-' after event type, like:
# cat > test.c
#include <stdio.h>
int main(void)
{
printf("Hello world\n");
while(1) {}
}
^D
# gcc -g -o test test.c
# perf probe -x test 'test.c:5'
# perf record -e '{cpu/cpu-cycles,period=10000/,probe_test:main}:S' ./test
...
# perf script -Ftrace:+period,-cpu
test 3859 396291.117343: 10275 cpu/cpu-cycles,period=10000/: 7f..
test 3859 396291.118234: 11041 cpu/cpu-cycles,period=10000/: ffffff..
test 3859 396291.118234: 1 probe_test:main:
test 3859 396291.118248: 8668 cpu/cpu-cycles,period=10000/: ffffff..
test 3859 396291.118263: 10139 cpu/cpu-cycles,period=10000/: ffffff..
Committer testing:
Couldn't make the test above work, but tested it with:
# perf probe -x hello main
Added new event:
probe_hello:main (on main in /home/acme/c/hello)
You can now use it in all perf tools, such as:
perf record -e probe_hello:main -aR sleep 1
# perf record -e probe_hello:main ./hello
hello, world
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.025 MB perf.data (1 samples) ]
# perf script
hello 21454 [002] 254116.874005: probe_hello:main: (401126)
#
# perf script -Ftrace:+period,-cpu
hello 21454 254116.874005: 1 probe_hello:main: (401126)
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: Andi Kleen <ak@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20190220122800.864-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/Documentation/perf-script.txt')
-rw-r--r-- | tools/perf/Documentation/perf-script.txt | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-script.txt b/tools/perf/Documentation/perf-script.txt index 9e4def08d569..2e19fd7ffe35 100644 --- a/tools/perf/Documentation/perf-script.txt +++ b/tools/perf/Documentation/perf-script.txt @@ -159,6 +159,12 @@ OPTIONS the override, and the result of the above is that only S/W and H/W events are displayed with the given fields. + It's possible tp add/remove fields only for specific event type: + + -Fsw:-cpu,-period + + removes cpu and period from software events. + For the 'wildcard' option if a user selected field is invalid for an event type, a message is displayed to the user that the option is ignored for that type. For example: |