Messages in this thread | | | Date | Mon, 3 Oct 2011 13:27:04 -0300 | From | Arnaldo Carvalho de Melo <> | Subject | Re: [PATCH] perf tools: Exit recording if events have non matching sample type |
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Em Mon, Oct 03, 2011 at 12:22:35PM +0200, Jiri Olsa escreveu: > On Thu, Sep 29, 2011 at 07:05:48PM -0300, Arnaldo Carvalho de Melo wrote: > > Em Thu, Sep 29, 2011 at 06:01:08PM +0200, Jiri Olsa escreveu: > > > The event processing relies on all events having the same sample_type. > > > > > > This is being checked when the session is being opened read only. > > > It also needs to be checked when we do record, since events could be > > > read during processing build IDs at the end of the record command. > > > > > > If we process events with different sample_type the processing might > > > skip some events or hang. > > > > > > Following command hangs on my setup: > > > ./perf record -o perf.data -e ext4:ext4_mb_new_group_pa \ > > > -e LLC-loads -- date '+%F' > > > > > > because hardware and tracepoint events have different sample type. > > > > > > With the patch applied the record command displays > > > "Non matching sample_type" message and exits. > > > > That is way too cryptic :-\ > > > > What is that makes the sample type not match in this case? Can we make > > it match instead? > > > > This is something to be properly fixed by _allowing_ non matching sample > > types, the evsel/evlist abstractions are getting we close but not there > > yet, multiple files in a perf.data/ directory are needed. > > > > Till then can you check if we can make it match or else just say that > > the mix of events is not yet supported, please collect them in different > > sessions or something along those lines? > > > > - Arnaldo > hi, > thanks for comments.. > I just was this got in the tip tree git://tesla.tglx.de/git/linux-2.6-tip > > perf tools: Exit record if events have non matching sample type > commit 6f9a4869e15de8af2fd715af876bc3e6b00757a7 > Author: Jiri Olsa <jolsa@redhat.com> > Date: Thu Sep 29 19:49:50 2011 +0200 > > I've read the email trail.. I'll check the sources and try to come up > with something.. ;)
Couldn't understand, will check if the patch was already applied, if so, why bother commenting, right? :-)
- Arnaldo
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