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From: Jiri Olsa <jolsa@redhat.com>
To: John Garry <john.garry@huawei.com>
Cc: Andi Kleen <ak@linux.intel.com>, Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Arnaldo Carvalho de Melo <acme@kernel.org>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Linuxarm <linuxarm@huawei.com>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	Will Deacon <will.deacon@arm.com>,
	Mark Rutland <mark.rutland@arm.com>
Subject: Re: [PATCH] perf tools: Store ids for events with their own cpus perf_event__synthesize_event_update_cpus
Date: Tue, 9 Oct 2018 12:00:49 +0200	[thread overview]
Message-ID: <20181009100049.GF6499@krava> (raw)
In-Reply-To: <d071bb27-5533-da2f-9f8f-808183e04794@huawei.com>

On Thu, Oct 04, 2018 at 10:20:39AM +0100, John Garry wrote:

SNIP

> > We synthesize an update event that needs to touch the evsel
> > id array, which is not defined at that time. Fixing this by
> > forcing the id allocation for events with theeir own cpus.
> > 
> > Reported-by: John Garry <john.garry@huawei.com>
> > Link: http://lkml.kernel.org/n/tip-8x4n7o34yheigoxm1jibflm6@git.kernel.org
> 
> Tested-by: John Garry <john.garry@huawei.com>
> 
> In terms of adding to stable, LT v4.14 is not affected, but 4.18.x is.
> 
> Thanks,
> John

Arnaldo, could you please pick up this one

thanks,
jirka

> 
> > Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> > ---
> >  tools/perf/builtin-report.c | 1 +
> >  tools/perf/util/evsel.c     | 3 +++
> >  2 files changed, 4 insertions(+)
> > 
> > diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> > index c0703979c51d..257c9c18cb7e 100644
> > --- a/tools/perf/builtin-report.c
> > +++ b/tools/perf/builtin-report.c
> > @@ -980,6 +980,7 @@ int cmd_report(int argc, const char **argv)
> >  			.id_index	 = perf_event__process_id_index,
> >  			.auxtrace_info	 = perf_event__process_auxtrace_info,
> >  			.auxtrace	 = perf_event__process_auxtrace,
> > +			.event_update	 = perf_event__process_event_update,
> >  			.feature	 = process_feature_event,
> >  			.ordered_events	 = true,
> >  			.ordering_requires_timestamps = true,
> > diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> > index ac6cfb8b085e..7a0d5fbaf3c1 100644
> > --- a/tools/perf/util/evsel.c
> > +++ b/tools/perf/util/evsel.c
> > @@ -1088,6 +1088,9 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
> >  		attr->exclude_user   = 1;
> >  	}
> > 
> > +	if (evsel->own_cpus)
> > +		evsel->attr.read_format |= PERF_FORMAT_ID;
> > +
> >  	/*
> >  	 * Apply event specific term settings,
> >  	 * it overloads any global configuration.
> > 
> 
> 

WARNING: multiple messages have this Message-ID
From: jolsa@redhat.com (Jiri Olsa)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] perf tools: Store ids for events with their own cpus perf_event__synthesize_event_update_cpus
Date: Tue, 9 Oct 2018 12:00:49 +0200	[thread overview]
Message-ID: <20181009100049.GF6499@krava> (raw)
In-Reply-To: <d071bb27-5533-da2f-9f8f-808183e04794@huawei.com>

On Thu, Oct 04, 2018 at 10:20:39AM +0100, John Garry wrote:

SNIP

> > We synthesize an update event that needs to touch the evsel
> > id array, which is not defined at that time. Fixing this by
> > forcing the id allocation for events with theeir own cpus.
> > 
> > Reported-by: John Garry <john.garry@huawei.com>
> > Link: http://lkml.kernel.org/n/tip-8x4n7o34yheigoxm1jibflm6 at git.kernel.org
> 
> Tested-by: John Garry <john.garry@huawei.com>
> 
> In terms of adding to stable, LT v4.14 is not affected, but 4.18.x is.
> 
> Thanks,
> John

Arnaldo, could you please pick up this one

thanks,
jirka

> 
> > Signed-off-by: Jiri Olsa <jolsa@kernel.org>
> > ---
> >  tools/perf/builtin-report.c | 1 +
> >  tools/perf/util/evsel.c     | 3 +++
> >  2 files changed, 4 insertions(+)
> > 
> > diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
> > index c0703979c51d..257c9c18cb7e 100644
> > --- a/tools/perf/builtin-report.c
> > +++ b/tools/perf/builtin-report.c
> > @@ -980,6 +980,7 @@ int cmd_report(int argc, const char **argv)
> >  			.id_index	 = perf_event__process_id_index,
> >  			.auxtrace_info	 = perf_event__process_auxtrace_info,
> >  			.auxtrace	 = perf_event__process_auxtrace,
> > +			.event_update	 = perf_event__process_event_update,
> >  			.feature	 = process_feature_event,
> >  			.ordered_events	 = true,
> >  			.ordering_requires_timestamps = true,
> > diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
> > index ac6cfb8b085e..7a0d5fbaf3c1 100644
> > --- a/tools/perf/util/evsel.c
> > +++ b/tools/perf/util/evsel.c
> > @@ -1088,6 +1088,9 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
> >  		attr->exclude_user   = 1;
> >  	}
> > 
> > +	if (evsel->own_cpus)
> > +		evsel->attr.read_format |= PERF_FORMAT_ID;
> > +
> >  	/*
> >  	 * Apply event specific term settings,
> >  	 * it overloads any global configuration.
> > 
> 
> 

  reply	other threads:[~2018-10-09 10:00 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-25 15:53 perf segmentation fault from NULL dereference John Garry
2018-09-25 15:53 ` John Garry
2018-09-27  3:00 ` Andi Kleen
2018-09-27  3:00   ` Andi Kleen
2018-10-02 10:20   ` John Garry
2018-10-02 10:20     ` John Garry
2018-09-27 16:02 ` Jiri Olsa
2018-09-27 16:02   ` Jiri Olsa
2018-10-02 10:41   ` John Garry
2018-10-02 10:41     ` John Garry
2018-10-02 11:16     ` Jiri Olsa
2018-10-02 11:16       ` Jiri Olsa
2018-10-03 11:36       ` [PATCH] perf tools: Allocate id array in perf_event__synthesize_event_update_cpus Jiri Olsa
2018-10-03 11:36         ` Jiri Olsa
2018-10-03 14:08         ` John Garry
2018-10-03 14:08           ` John Garry
2018-10-03 14:16           ` Jiri Olsa
2018-10-03 14:16             ` Jiri Olsa
2018-10-03 21:20             ` [PATCH] perf tools: Store ids for events with their own cpus perf_event__synthesize_event_update_cpus Jiri Olsa
2018-10-03 21:20               ` Jiri Olsa
2018-10-04  9:20               ` John Garry
2018-10-04  9:20                 ` John Garry
2018-10-09 10:00                 ` Jiri Olsa [this message]
2018-10-09 10:00                   ` Jiri Olsa
2018-10-12 13:25                   ` John Garry
2018-10-12 13:25                     ` John Garry
2018-10-15 19:15                     ` Arnaldo Carvalho de Melo
2018-10-15 19:15                       ` Arnaldo Carvalho de Melo
2018-10-16  9:10                       ` John Garry
2018-10-16  9:10                         ` John Garry
2018-10-16 10:47                         ` Jiri Olsa
2018-10-16 10:47                           ` Jiri Olsa
2018-10-18  6:18               ` [tip:perf/urgent] perf evsel: " tip-bot for Jiri Olsa

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