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Message-ID: <87a5b0800812090846h396523a0kdb2d1ca4b4781851@mail.gmail.com>
Date: Tue, 9 Dec 2008 16:46:27 +0000
From: "Will Newton" <will.newton@gmail.com>
To: "Ingo Molnar" <mingo@elte.hu>
Subject: Re: [patch] Performance Counters for Linux, v2
Cc: eranian@gmail.com, linux-kernel@vger.kernel.org,
       "Thomas Gleixner" <tglx@linutronix.de>, linux-arch@vger.kernel.org,
       "Andrew Morton" <akpm@linux-foundation.org>,
       "Eric Dumazet" <dada1@cosmosbay.com>,
       "Robert Richter" <robert.richter@amd.com>,
       "Arjan van de Veen" <arjan@infradead.org>,
       "Peter Anvin" <hpa@zytor.com>,
       "Peter Zijlstra" <a.p.zijlstra@chello.nl>,
       "Steven Rostedt" <rostedt@goodmis.org>,
       "David Miller" <davem@davemloft.net>,
       "Paul Mackerras" <paulus@samba.org>,
       "Paolo Ciarrocchi" <paolo.ciarrocchi@gmail.com>
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On Tue, Dec 9, 2008 at 1:46 PM, Ingo Molnar <mingo@elte.hu> wrote:

> Firstly, sampling "at 1msec intervals" or any fixed period is a _very_
> wrong mindset - and cross-sampling counters is a similarly wrong mindset.

If your hardware does not interrupt on overflow I don't think you have
any choice in the matter. I know such hardware is less than ideal but
it exists so it should be supported.
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