From: Andi Kleen <andi@firstfloor.org>
To: Stephane Eranian <eranian@google.com>
Cc: linux-kernel@vger.kernel.org, acme@redhat.com,
peterz@infradead.org, mingo@elte.hu, jolsa@redhat.com,
namhyung@kernel.org, kan.liang@intel.com, dsahern@gmail.com,
adrian.hunter@intel.com
Subject: Re: [PATCH v2 4/4] perf script: enable printing of branch stack
Date: Mon, 31 Aug 2015 10:08:01 -0700 [thread overview]
Message-ID: <874mjfxu6m.fsf@tassilo.jf.intel.com> (raw)
In-Reply-To: <20150831170535.GY4524@tassilo.jf.intel.com> (Andi Kleen's message of "Mon, 31 Aug 2015 10:05:35 -0700")
Andi Kleen <ak@linux.intel.com> writes:
>> $ perf script -F ip,brstack
>> 5d3000 0x401aa0/0x5d2000/M/-/-/-/0 ...
>>
>> $ perf script -F ip,brstacksym
>> 4011e0 noploop+0x0/noploop+0x0/P/-/-/0
>
> That's a weird format that's hard to parse with standard tools like
> awk, and also for humans. How about separating with spaces?
Also can you include the number of the LBR in the branch record?
That can be useful sometimes.
BTW I haven't checked, but it would be also good to make sure
the print order is the same as program order (perf stores
the LBRs reversed)
-Andi
--
ak@linux.intel.com -- Speaking for myself only
next prev parent reply other threads:[~2015-08-31 17:08 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-31 16:41 [PATCH v2 0/4] perf: improve script and record for iregs and brstack Stephane Eranian
2015-08-31 16:41 ` [PATCH v2 1/4] perf script: enable printing of interrupted machine state Stephane Eranian
2015-08-31 20:51 ` Arnaldo Carvalho de Melo
2015-09-01 8:31 ` [tip:perf/urgent] perf script: Enable " tip-bot for Stephane Eranian
2015-08-31 16:41 ` [PATCH v2 2/4] perf/x86: add list of register names Stephane Eranian
2015-09-01 8:31 ` [tip:perf/urgent] perf/x86: Add " tip-bot for Stephane Eranian
2015-08-31 16:41 ` [PATCH v2 3/4] perf record: add ability to name registers to record Stephane Eranian
2015-08-31 21:02 ` Arnaldo Carvalho de Melo
2015-09-01 8:32 ` [tip:perf/urgent] perf record: Add " tip-bot for Stephane Eranian
2015-08-31 16:41 ` [PATCH v2 4/4] perf script: enable printing of branch stack Stephane Eranian
2015-08-31 17:05 ` Andi Kleen
2015-08-31 17:08 ` Andi Kleen [this message]
2015-10-30 9:13 ` [tip:perf/core] perf script: Enable " tip-bot for Stephane Eranian
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