* perf report does not get along with perf record -A [not found] <1974638847.4574239.1340667841898.JavaMail.root@mozilla.com> @ 2012-06-26 0:10 ` Martin Rosenberg 2012-06-26 4:40 ` David Ahern 2012-06-26 14:24 ` David Ahern 0 siblings, 2 replies; 4+ messages in thread From: Martin Rosenberg @ 2012-06-26 0:10 UTC (permalink / raw) To: linux-kernel I'm working under the assumption that if I want to collect statistics from multiple runs of a program, I can do this by running perf record prog; perf record -A prog; perf record -A prog I've found that running perf record twice results in perf report hanging, and running it more than twice results in perf report first spewing a message about invalid formats, then crashing. A log of the session, as well as the binary, its input and perf.data can be found at: http://www.club.cc.cmu.edu/~mjrosenb/ion/perf_crash.tar.gz Thanks --Marty ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: perf report does not get along with perf record -A 2012-06-26 0:10 ` perf report does not get along with perf record -A Martin Rosenberg @ 2012-06-26 4:40 ` David Ahern 2012-06-26 5:04 ` Martin Rosenberg 2012-06-26 14:24 ` David Ahern 1 sibling, 1 reply; 4+ messages in thread From: David Ahern @ 2012-06-26 4:40 UTC (permalink / raw) To: Martin Rosenberg; +Cc: linux-kernel On 6/25/12 6:10 PM, Martin Rosenberg wrote: > I'm working under the assumption that if I want to collect statistics from multiple runs of a program, I can do this by running > perf record prog; perf record -A prog; perf record -A prog > > I've found that running perf record twice results in perf report hanging, and running it more than twice results in perf report first spewing a message about invalid formats, then crashing. > A log of the session, as well as the binary, its input and perf.data can be found at: What does 'perf --version' show? David ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: perf report does not get along with perf record -A 2012-06-26 4:40 ` David Ahern @ 2012-06-26 5:04 ` Martin Rosenberg 0 siblings, 0 replies; 4+ messages in thread From: Martin Rosenberg @ 2012-06-26 5:04 UTC (permalink / raw) To: David Ahern; +Cc: linux-kernel Derp. I went through all of that effort to make sure I had recorded everything about my setup, and I forgot the versiou perf version 3.2.17 built unpatched from a 3.4.4 tarball ----- Original Message ----- From: "David Ahern" <dsahern@gmail.com> To: "Martin Rosenberg" <mrosenberg@mozilla.com> Cc: linux-kernel@vger.kernel.org Sent: Monday, June 25, 2012 9:40:49 PM Subject: Re: perf report does not get along with perf record -A On 6/25/12 6:10 PM, Martin Rosenberg wrote: > I'm working under the assumption that if I want to collect statistics from multiple runs of a program, I can do this by running > perf record prog; perf record -A prog; perf record -A prog > > I've found that running perf record twice results in perf report hanging, and running it more than twice results in perf report first spewing a message about invalid formats, then crashing. > A log of the session, as well as the binary, its input and perf.data can be found at: What does 'perf --version' show? David ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: perf report does not get along with perf record -A 2012-06-26 0:10 ` perf report does not get along with perf record -A Martin Rosenberg 2012-06-26 4:40 ` David Ahern @ 2012-06-26 14:24 ` David Ahern 1 sibling, 0 replies; 4+ messages in thread From: David Ahern @ 2012-06-26 14:24 UTC (permalink / raw) To: Martin Rosenberg; +Cc: linux-kernel, Arnaldo Carvalho de Melo, Thomas Gleixner On 6/25/12 6:10 PM, Martin Rosenberg wrote: > I'm working under the assumption that if I want to collect statistics from multiple runs of a program, I can do this by running > perf record prog; perf record -A prog; perf record -A prog > > I've found that running perf record twice results in perf report hanging, and running it more than twice results in perf report first spewing a message about invalid formats, then crashing. > A log of the session, as well as the binary, its input and perf.data can be found at: > > http://www.club.cc.cmu.edu/~mjrosenb/ion/perf_crash.tar.gz Append has been broken for a long time (v2.6.36 last working version). git bisect points to: commit 55b44629f599a2305265ae9c77f9d9bcfd6ddc17 Author: Thomas Gleixner <tglx@linutronix.de> Date: Tue Nov 30 17:49:46 2010 +0000 perf session: Use sensible mmap size On 64bit we can map the whole file in one go, on 32bit we can at least map 32MB and not map/unmap tiny chunks of the file. Base the progress bar on 1/16 of the data size. Preparatory patch to get rid of the malloc/memcpy/free of trace data. Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20101130163820.213687773@linutronix.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> :040000 040000 a0d7ddfb30b562a548052b12b142b579aa888886 dd4e368cbdf0ba24126afcc0fe42feea3b68f4a7 M tools The commit right before that one (d65132) dumps some errors, but at least does not hang -- spinning in the event processing. David ^ permalink raw reply [flat|nested] 4+ messages in thread
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2012-06-26 0:10 ` perf report does not get along with perf record -A Martin Rosenberg
2012-06-26 4:40 ` David Ahern
2012-06-26 5:04 ` Martin Rosenberg
2012-06-26 14:24 ` David Ahern
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