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| author | Dongsheng <yangds.fnst@cn.fujitsu.com> | 2014-05-06 14:39:01 +0900 |
|---|---|---|
| committer | Jiri Olsa <jolsa@kernel.org> | 2014-05-12 11:09:05 +0200 |
| commit | 6bcab4e1eaa1f669d003051ef3b87a963d8763bb (patch) | |
| tree | cb0aef3cb6825bbff6db31d76d86a1d36a61d285 /tools/perf/builtin-sched.c | |
| parent | e936e8e459e14af7432a775f8139a79b71e41afc (diff) | |
| download | linux-6bcab4e1eaa1f669d003051ef3b87a963d8763bb.tar.gz linux-6bcab4e1eaa1f669d003051ef3b87a963d8763bb.tar.bz2 linux-6bcab4e1eaa1f669d003051ef3b87a963d8763bb.zip | |
perf tools: Clarify the output of perf sched map.
In output of perf sched map, any shortname of thread will be explained
at the first time when it appear.
Example:
*A0 228836.978985 secs A0 => perf:23032
*. A0 228836.979016 secs B0 => swapper:0
. *C0 228836.979099 secs C0 => migration/3:22
*A0 . C0 228836.979115 secs
A0 . *. 228836.979115 secs
But B0, which is explained as swapper:0 did not appear in the
left part of output. Instead, we use '.' as the shortname of
swapper:0. So the comment of "B0 => swapper:0" is not easy to
understand.
This patch clarify the output of perf sched map with not allocating
one letter-number shortname for swapper:0 and print ". => swapper:0"
as the explanation for swapper:0.
Example:
*A0 228836.978985 secs A0 => perf:23032
* . A0 228836.979016 secs . => swapper:0
. *B0 228836.979099 secs B0 => migration/3:22
*A0 . B0 228836.979115 secs
A0 . * . 228836.979115 secs
A0 *C0 . 228836.979225 secs C0 => ksoftirqd/2:18
A0 *D0 . 228836.979236 secs D0 => rcu_sched:7
Signed-off-by: Dongsheng <yangds.fnst@cn.fujitsu.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Link: http://lkml.kernel.org/r/1399354741-19522-1-git-send-email-yangds.fnst@cn.fujitsu.com
[ small style fixes to make checkpatch happy ]
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Diffstat (limited to 'tools/perf/builtin-sched.c')
| -rw-r--r-- | tools/perf/builtin-sched.c | 35 |
1 files changed, 20 insertions, 15 deletions
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c index 4f0dd21b5923..2579215f5743 100644 --- a/tools/perf/builtin-sched.c +++ b/tools/perf/builtin-sched.c @@ -1300,17 +1300,25 @@ static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel, new_shortname = 0; if (!sched_in->shortname[0]) { - sched_in->shortname[0] = sched->next_shortname1; - sched_in->shortname[1] = sched->next_shortname2; - - if (sched->next_shortname1 < 'Z') { - sched->next_shortname1++; + if (!strcmp(thread__comm_str(sched_in), "swapper")) { + /* + * Don't allocate a letter-number for swapper:0 + * as a shortname. Instead, we use '.' for it. + */ + sched_in->shortname[0] = '.'; + sched_in->shortname[1] = ' '; } else { - sched->next_shortname1='A'; - if (sched->next_shortname2 < '9') { - sched->next_shortname2++; + sched_in->shortname[0] = sched->next_shortname1; + sched_in->shortname[1] = sched->next_shortname2; + + if (sched->next_shortname1 < 'Z') { + sched->next_shortname1++; } else { - sched->next_shortname2='0'; + sched->next_shortname1 = 'A'; + if (sched->next_shortname2 < '9') + sched->next_shortname2++; + else + sched->next_shortname2 = '0'; } } new_shortname = 1; @@ -1322,12 +1330,9 @@ static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel, else printf("*"); - if (sched->curr_thread[cpu]) { - if (sched->curr_thread[cpu]->tid) - printf("%2s ", sched->curr_thread[cpu]->shortname); - else - printf(". "); - } else + if (sched->curr_thread[cpu]) + printf("%2s ", sched->curr_thread[cpu]->shortname); + else printf(" "); } |