linux-kernel - Re: [patch/rfc] perf on raspberry-pi without overflow interrupt

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Message-ID: <20140507212354.GC5311@arm.com>
Date:	Wed, 7 May 2014 22:23:54 +0100
From:	Will Deacon <will.deacon@....com>
To:	Vince Weaver <vincent.weaver@...ne.edu>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Chad Paradis <chad.paradis@...t.maine.edu>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Stephane Eranian <eranian@...il.com>
Subject: Re: [patch/rfc] perf on raspberry-pi without overflow interrupt

On Wed, May 07, 2014 at 10:21:52PM +0100, Vince Weaver wrote:
> On Wed, 7 May 2014, Will Deacon wrote:
> 
> > > OK, let me revisit the patches.  The last set of generic ones I sent out 
> > > actually was broken on ARM and I've been meaning to straighten things out 
> > > and send a proper follow up patch set but got distracted by other perf 
> > > related issues.
> > 
> > Any luck with this? I just got (another) report of a PMU with borked
> > interrupts, so a fix would be great if you've got one.
> 
> Let me see if I can get a final patch out for that.
> 
> I've been working on it off and on, the problem is that the patch that 
> enables things on the Raspberry Pi somehow breaks sampled events on my 
> pandaboard.
> 
> Let me compile up some new kernels and do some more testing and hopefully 
> get this sorted out this week.

Cheers Vince, much appreciated. I can help test if you need it (my broken
boards will come in useful at last!)

Will
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