linux-kernel - Re: [PATCHv3 00/19] perf tools: Factor ordered samples queue

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Date:	Mon, 21 Jul 2014 12:36:54 -0600
From:	David Ahern <dsahern@...il.com>
To:	Adrian Hunter <adrian.hunter@...el.com>,
	Andi Kleen <andi@...stfloor.org>
CC:	Jiri Olsa <jolsa@...nel.org>, linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...nel.org>,
	Jean Pihet <jean.pihet@...aro.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCHv3 00/19] perf tools: Factor ordered samples queue

On 7/21/14, 12:23 PM, Adrian Hunter wrote:
> On 21/07/2014 7:31 p.m., Andi Kleen wrote:
>> Jiri Olsa <jolsa@...hat.com> writes:
>>>
>>> [jolsa@...-x3650m4-01 perf]$ sudo ./perf report --stdio
>>> Timestamp below last timeslice flush
>>> 0x2276f58 [0x68]: failed to process type: 9
>>
>> FWIW we're seeing this frequently too.
>
> Jiri's example didn't work for me.  Do you have one?

$ perf sched record  -m 8192 -- perf bench sched all
# Running sched/messaging benchmark...
# 20 sender and receiver processes per group
# 10 groups == 400 processes run

      Total time: 0.087 [sec]

# Running sched/pipe benchmark...
# Executed 1000000 pipe operations between two processes

      Total time: 12.043 [sec]

       12.043779 usecs/op
           83030 ops/sec

[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 289.549 MB perf.data (~12650569 samples) ]
0x54b4828 [0]: failed to process type: 0

No overload condition, no dropped chunks message - yet can't process events.

David
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