From: Jiri Olsa <jolsa@redhat.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: acme@kernel.org, jolsa@kernel.org, linux-kernel@vger.kernel.org,
Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH] perf, tools, report: Add srcline_from/to branch sort keys
Date: Sat, 21 May 2016 14:01:51 +0200 [thread overview]
Message-ID: <20160521120151.GA18117@krava> (raw)
In-Reply-To: <1463775308-32748-1-git-send-email-andi@firstfloor.org>
On Fri, May 20, 2016 at 01:15:08PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@linux.intel.com>
>
> Add srcline_from and srcline_to branch sort keys that allow
> to show the source lines of a branch. That makes it much easier
> to track down where particular branches happen in the program,
> for example to examine branch mispredictions, or to associate
> it with cycle counts:
>
> % perf record -b -e cycles:p ./tcall
> % perf report --sort srcline_from,srcline_to,mispredict
> ...
> 15.10% tcall.c:18 tcall.c:10 N
> 14.83% tcall.c:11 tcall.c:5 N
> 14.12% tcall.c:7 tcall.c:12 N
> 14.04% tcall.c:12 tcall.c:5 N
> 12.42% tcall.c:17 tcall.c:18 N
> 12.39% tcall.c:7 tcall.c:13 N
> 12.27% tcall.c:13 tcall.c:17 N
> ...
>
> % perf report --sort srcline_from,srcline_to,cycles
> ...
> 17.12% tcall.c:18 tcall.c:11 1
> 17.01% tcall.c:12 tcall.c:6 1
> 16.98% tcall.c:11 tcall.c:6 1
> 15.91% tcall.c:17 tcall.c:18 1
> 6.38% tcall.c:7 tcall.c:17 7
> 4.80% tcall.c:7 tcall.c:12 8
> 4.21% tcall.c:7 tcall.c:17 8
> 2.67% tcall.c:7 tcall.c:12 7
> 2.62% tcall.c:7 tcall.c:12 10
> 2.10% tcall.c:7 tcall.c:17 9
> 1.58% tcall.c:7 tcall.c:12 6
> 1.44% tcall.c:7 tcall.c:12 5
> 1.38% tcall.c:7 tcall.c:12 9
> 1.06% tcall.c:7 tcall.c:17 13
> 1.05% tcall.c:7 tcall.c:12 4
> 1.01% tcall.c:7 tcall.c:17 6
>
> Open issues:
> - Some kernel symbols get misresolved.
Acked-by: Jiri Olsa <jolsa@kernel.org>
thanks,
jirka
next prev parent reply other threads:[~2016-05-21 12:01 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-20 20:15 [PATCH] perf, tools, report: Add srcline_from/to branch sort keys Andi Kleen
2016-05-21 12:01 ` Jiri Olsa [this message]
2016-05-23 14:25 ` Arnaldo Carvalho de Melo
2016-05-24 5:46 ` [tip:perf/urgent] perf " tip-bot for Andi Kleen
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=20160521120151.GA18117@krava \
--to=jolsa@redhat.com \
--cc=acme@kernel.org \
--cc=ak@linux.intel.com \
--cc=andi@firstfloor.org \
--cc=jolsa@kernel.org \
--cc=linux-kernel@vger.kernel.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.