From: Jiri Olsa <jolsa@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org,
Dongsheng <yangds.fnst@cn.fujitsu.com>,
Jiri Olsa <jolsa@kernel.org>
Subject: [PATCH 3/6] perf tools: Clarify the output of perf sched map.
Date: Mon, 12 May 2014 11:27:10 +0200 [thread overview]
Message-ID: <1399886833-15472-4-git-send-email-jolsa@kernel.org> (raw)
In-Reply-To: <1399886833-15472-1-git-send-email-jolsa@kernel.org>
From: Dongsheng <yangds.fnst@cn.fujitsu.com>
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>
---
tools/perf/builtin-sched.c | 35 ++++++++++++++++++++---------------
1 file changed, 20 insertions(+), 15 deletions(-)
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 4f0dd21..2579215 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(" ");
}
--
1.8.3.1
next prev parent reply other threads:[~2014-05-12 9:27 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-12 9:27 [GIT PULL 0/6] perf/core improvements and fixes Jiri Olsa
2014-05-12 9:27 ` [PATCH 1/6] perf tools: Add missing event for perf sched record Jiri Olsa
2014-05-12 9:27 ` [PATCH 2/6] perf tools: Adapt the TASK_STATE_TO_CHAR_STR to new value in kernel space Jiri Olsa
2014-05-12 9:27 ` Jiri Olsa [this message]
2014-05-12 9:27 ` [PATCH 4/6] perf record: Propagate exit status of a command line workload Jiri Olsa
2014-05-12 9:27 ` [PATCH 5/6] perf tools: Get rid of on_exit() feature test Jiri Olsa
2014-05-12 9:27 ` [PATCH 6/6] perf tools: Use tid for finding thread Jiri Olsa
2014-05-12 15:59 ` [GIT PULL 0/6] perf/core improvements and fixes Ingo Molnar
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