linux-kernel - Re: Performance Events hangs with Intel P4 system

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Message-ID: <20100514162813.GB13509@lenovo>
Date:	Fri, 14 May 2010 20:28:13 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Jaswinder Singh Rajput <jaswinderlinux@...il.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Lin Ming <ming.m.lin@...el.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Frederic Weisbecker <fweisbec@...il.com>
Subject: Re: Performance Events hangs with Intel P4 system

On Fri, May 14, 2010 at 09:52:28PM +0530, Jaswinder Singh Rajput wrote:
... 
> Yes, this works for me. Now I am not getting general protection fault.
> 
> It seems hardware events are not supported for P4 yet.
> 
> $ ./perf stat -e
> cycles,instructions,cache-references,cache-misses,branches,branch-misses,bus-cycles
> ls > /dev/null
> 
>  Performance counter stats for 'ls':
> 
>   <not counted>  cycles
>          601636  instructions             #      0.000 IPC    (scaled
> from 91.80%)
>   <not counted>  cache-references
>   <not counted>  cache-misses
>   <not counted>  branches
>   <not counted>  branch-misses
>   <not counted>  bus-cycles
> 
>     0.003364910  seconds time elapsed

Thanks Jaswinder,

it means counters management somehow screwed at moment (it was working before).
I'm working on it.

	-- Cyrill
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