From: Jiri Olsa <jolsa@redhat.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Andi Kleen <ak@linux.intel.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Jiri Olsa <jolsa@kernel.org>,
Stephane Eranian <eranian@google.com>,
Thomas Gleixner <tglx@linutronix.de>,
Vince Weaver <vince@deater.net>, Ingo Molnar <mingo@kernel.org>
Subject: Re: pmu::read() called erroneously in v4.13-rc{3,4}
Date: Mon, 21 Aug 2017 16:46:14 +0200 [thread overview]
Message-ID: <20170821144614.GA15568@krava> (raw)
In-Reply-To: <20170811111807.GD12985@leverpostej>
On Fri, Aug 11, 2017 at 12:18:07PM +0100, Mark Rutland wrote:
SNIP
>
> I'm also confused by perf_output_read_group() when event == leader.
> AFAICT, in that case we won't read() the event at all, and we'll only
> read() the siblings. Is that right?
I think we assume perf_output_read_group is only called from event's
PMI which means it's already been called for event
jirka
prev parent reply other threads:[~2017-08-21 14:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-10 17:35 pmu::read() called erroneously in v4.13-rc{3,4} Mark Rutland
2017-08-10 19:03 ` Andi Kleen
2017-08-11 9:32 ` Mark Rutland
2017-08-11 11:18 ` Mark Rutland
2017-08-21 14:46 ` Jiri Olsa [this message]
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