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

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Message-ID: <20140108225315.GG31570@twins.programming.kicks-ass.net>
Date:	Wed, 8 Jan 2014 23:53:15 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Vince Weaver <vincent.weaver@...ne.edu>
Cc:	linux-kernel@...r.kernel.org, Will Deacon <will.deacon@....com>,
	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, Jan 08, 2014 at 04:28:20PM -0500, Vince Weaver wrote:
> Should the perf_event interface handle setups like this better and work 
> fine in aggregate mode but return ENOTSUP if a sampled or overflow event 
> is attempted?

Yeah that would be better, we do something similar for P6 class machines
without lapic IIRC.
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