From: tip-bot for Jin Yao <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: jolsa@kernel.org, linux-kernel@vger.kernel.org, acme@redhat.com,
hpa@zytor.com, kan.liang@linux.intel.com, ak@linux.intel.com,
peterz@infradead.org, alexander.shishkin@linux.intel.com,
yao.jin@linux.intel.com, mingo@kernel.org, tglx@linutronix.de
Subject: [tip:perf/urgent] perf top: Display the LBR stats in callchain entry
Date: Tue, 6 Nov 2018 11:14:37 -0800 [thread overview]
Message-ID: <tip-590ac60d8aa929bd21e35cd95a7d8720d00eb4f3@git.kernel.org> (raw)
In-Reply-To: <1540983995-20462-1-git-send-email-yao.jin@linux.intel.com>
Commit-ID: 590ac60d8aa929bd21e35cd95a7d8720d00eb4f3
Gitweb: https://git.kernel.org/tip/590ac60d8aa929bd21e35cd95a7d8720d00eb4f3
Author: Jin Yao <yao.jin@linux.intel.com>
AuthorDate: Wed, 31 Oct 2018 19:06:35 +0800
Committer: Arnaldo Carvalho de Melo <acme@redhat.com>
CommitDate: Mon, 5 Nov 2018 14:37:11 -0300
perf top: Display the LBR stats in callchain entry
'perf report' has supported the displaying of LBR stats (such as cycles,
predicted%) in callchain entry.
For example:
$ perf report --branch-history --stdio
--1.01%--intel_idle mwait.h:29
intel_idle cpufeature.h:164 (cycles:5)
intel_idle cpufeature.h:164 (predicted:76.4%)
intel_idle mwait.h:102 (cycles:41)
intel_idle current.h:15
While 'perf top' doesn't support that.
For example:
$ perf top -a -b --call-graph branch
- 13.86% 0.23% [kernel] [k] __x86_indirect_thunk_rax
- 13.65% __x86_indirect_thunk_rax
+ 1.69% do_syscall_64
+ 1.68% do_select
+ 1.41% ktime_get
+ 0.70% __schedule
+ 0.62% do_sys_poll
0.58% __x86_indirect_thunk_rax
Actually it's very easy to enable this feature in 'perf top'.
With this patch, the result is:
$ perf top -a -b --call-graph branch
$ - 13.58% 0.00% [kernel] [k] __x86_indirect_thunk_rax
$ - 13.57% __x86_indirect_thunk_rax (predicted:93.9%)
$ + 1.78% do_select (cycles:2)
$ + 1.68% perf_pmu_disable.part.99 (cycles:1)
$ + 1.45% ___sys_recvmsg (cycles:25)
$ + 0.81% unix_stream_sendmsg (cycles:18)
$ + 0.80% ktime_get (cycles:400)
$ 0.58% pick_next_task_fair (cycles:47)
$ + 0.56% i915_request_retire (cycles:2)
$ + 0.52% do_sys_poll (cycles:4)
Signed-off-by: Jin Yao <yao.jin@linux.intel.com>
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: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1540983995-20462-1-git-send-email-yao.jin@linux.intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-top.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index b2838de13de0..aa0c73e57924 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1429,6 +1429,9 @@ int cmd_top(int argc, const char **argv)
}
}
+ if (opts->branch_stack && callchain_param.enabled)
+ symbol_conf.show_branchflag_count = true;
+
sort__mode = SORT_MODE__TOP;
/* display thread wants entries to be collapsed in a different tree */
perf_hpp_list.need_collapse = 1;
prev parent reply other threads:[~2018-11-06 19:14 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-31 11:06 [PATCH] perf top: Display the LBR stats in callchain entry Jin Yao
2018-11-05 0:31 ` Jin, Yao
2018-11-05 13:10 ` Arnaldo Carvalho de Melo
2018-11-05 17:23 ` Arnaldo Carvalho de Melo
2018-11-06 19:14 ` tip-bot for Jin Yao [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=tip-590ac60d8aa929bd21e35cd95a7d8720d00eb4f3@git.kernel.org \
--to=tipbot@zytor.com \
--cc=acme@redhat.com \
--cc=ak@linux.intel.com \
--cc=alexander.shishkin@linux.intel.com \
--cc=hpa@zytor.com \
--cc=jolsa@kernel.org \
--cc=kan.liang@linux.intel.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-tip-commits@vger.kernel.org \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=yao.jin@linux.intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).