Message-ID: <4B38AE1D.8060703@klingt.org>
Date: Mon, 28 Dec 2009 14:09:49 +0100
From: Tim Blechmann <tim@klingt.org>
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To: Peter Zijlstra <peterz@infradead.org>
CC: linux-kernel@vger.kernel.org
Subject: Re: perf: counter and event question
References: <4B389391.8050303@klingt.org> <1261999573.7135.83.camel@laptop>	 <4B38A707.4060904@klingt.org> <1262005413.7135.98.camel@laptop>
In-Reply-To: <1262005413.7135.98.camel@laptop>
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>>>> like it is impossible to sample instructions with a period of 1?=20
>>>
>>> Pretty much, imagine the cpu getting a trap every cycle.
>>
>> is this a hardware restriction? a slowdown is acceptable for me, as lo=
ng
>> as i am able to collect a huge number of samples accurately ...
>=20
> Large number of samples and sample interval are only related through th=
e
> runtime of your application.
>=20
> Use a sensible period (~10k ins) and run a 'little' longer.

well, for my application, i am not interested in statistical data, but
in the order of the events ...
(i am not doing profiling, but trying to gather a sequence of
machine-structured data for an artistic project)

tim

--=20
tim@klingt.org
http://tim.klingt.org

It is better to make a piece of music than to perform one, better to
perform one than to listen to one, better to listen to one than to
misuse it as a means of distraction, entertainment, or acquisition of
'culture'.
  John Cage


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