From: Peter Zijlstra <peterz@infradead.org>
To: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org, vince@deater.net,
eranian@google.com, Arnaldo Carvalho de Melo <acme@infradead.org>,
tglx@linutronix.de, ak@linux.intel.com
Subject: Re: [RFC PATCH 1/6] perf: Move mlock accounting to ring buffer allocation
Date: Fri, 23 Sep 2016 17:27:37 +0200 [thread overview]
Message-ID: <20160923152737.GN5008@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <8737kqu1x1.fsf@ashishki-desk.ger.corp.intel.com>
On Fri, Sep 23, 2016 at 05:27:22PM +0300, Alexander Shishkin wrote:
> > Afaict there's no actual need to hide the AUX buffer for this sampling
> > stuff; the user knows about all this and can simply mmap() the AUX part.
>
> Yes, you're right here. We could also re-use the AUX record, adding a
> new flag for this. It may be even better if I can work out the
> inheritance (the current code doesn't handle inheritance at the moment
> in case we decide to scrap it).
What is the exact problem with inheritance? You can inherit PT (and
other) events just fine, and their output redirects to the original
(AUX) buffer too.
Is the problem untangling which part of the AUX buffer belongs to which
task upon sample?
next prev parent reply other threads:[~2016-09-23 15:27 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-23 11:27 [RFC PATCH 0/6] perf: Add AUX data sampling Alexander Shishkin
2016-09-23 11:27 ` [RFC PATCH 1/6] perf: Move mlock accounting to ring buffer allocation Alexander Shishkin
2016-09-23 12:14 ` Peter Zijlstra
2016-09-23 14:27 ` Alexander Shishkin
2016-09-23 15:27 ` Peter Zijlstra [this message]
2016-09-23 15:58 ` Alexander Shishkin
2016-09-23 17:26 ` Andi Kleen
2016-09-23 20:28 ` Peter Zijlstra
2016-09-26 8:27 ` Alexander Shishkin
2016-09-26 9:03 ` Peter Zijlstra
2016-09-26 12:39 ` Alexander Shishkin
2016-09-26 16:13 ` Alexander Shishkin
2016-09-23 11:27 ` [RFC PATCH 2/6] perf: Add api to (de-)allocate AUX buffers for kernel counters Alexander Shishkin
2016-09-23 11:27 ` [RFC PATCH 3/6] perf: Add a helper for looking up pmus by type Alexander Shishkin
2016-09-23 11:27 ` [RFC PATCH 4/6] perf: Add infrastructure for using AUX data in perf samples Alexander Shishkin
2016-09-23 11:27 ` [RFC PATCH 5/6] perf: Disable PMU around address filter adjustment Alexander Shishkin
2016-09-23 11:27 ` [RFC PATCH 6/6] perf: Disable IRQs in address filter sync path Alexander Shishkin
2016-09-26 16:18 ` Alexander Shishkin
2016-10-04 16:49 ` Mathieu Poirier
2016-09-23 11:49 ` [RFC PATCH 0/6] perf: Add AUX data sampling Peter Zijlstra
2016-09-23 17:19 ` Andi Kleen
2016-09-23 20:35 ` Peter Zijlstra
2016-09-23 22:34 ` Andi Kleen
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