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From: Vince Weaver <vincent.weaver@maine.edu>
To: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Cc: Will Deacon <will.deacon@arm.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Paul Mackerras <paulus@samba.org>, Ingo Molnar <mingo@redhat.com>,
	vincent.weaver@maine.edu
Subject: [PATCH 0/3] perf: disable sampled events if no PMU interrupt
Date: Fri, 16 May 2014 17:07:54 -0400 (EDT)	[thread overview]
Message-ID: <alpine.DEB.2.10.1405161701160.11099@vincent-weaver-1.umelst.maine.edu> (raw)

Hello

This patch series adds a common shared interface for returning ENOTSUPP
if a user tries to create a sampled event (one with sample_period set)
on a machine that has no usable PMU interrupt.

Currently only x86 and ARM are implemented but if the patch is accepted
then we can move other architectures over to use the interface.

This patch also has the side effect of enabling perf to work on 
raspberry-pi machines.

Consideration should also be given to disabling sampling support on 
machines with buggy PMU interrupts (such as Cortex-A8 and Cortex-A9
ARM platforms).

Vince

             reply	other threads:[~2014-05-16 21:04 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-16 21:07 Vince Weaver [this message]
2014-05-16 21:12 ` [PATCH 1/3] perf: disable sampled events if no PMU interrupt Vince Weaver
2014-05-19 16:01   ` Will Deacon
2014-05-20  9:12   ` Peter Zijlstra
2014-05-20 13:19     ` Vince Weaver
2014-05-20 13:27       ` Peter Zijlstra
2014-06-05 14:38   ` [tip:perf/core] perf: Disable " tip-bot for Vince Weaver
2014-05-16 21:15 ` [PATCH 2/3] perf, ARM: use common PMU interrupt disabled code Vince Weaver
2014-05-19 15:57   ` Will Deacon
2014-05-20  9:12     ` Peter Zijlstra
2014-06-05 14:38   ` [tip:perf/core] perf/ARM: Use " tip-bot for Vince Weaver
2014-05-16 21:18 ` [PATCH 3/3] perf,x86: use " Vince Weaver
2014-06-05 14:38   ` [tip:perf/core] perf/x86: Use " tip-bot for Vince Weaver

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