linux-kernel - Re: [PATCH 4/4] perf script: Add script to collect and display IBS samples

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Date:	Fri, 23 Dec 2011 17:50:30 +0100
From:	Robert Richter <robert.richter@....com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Peter Zijlstra <peterz@...radead.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Stephane Eranian <eranian@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/4] perf script: Add script to collect and display IBS
 samples

On 23.12.11 17:39:30, Ingo Molnar wrote:
> No, i think you misunderstood me, i definitely think getting all 
> the data out is perfectly fine and useful, if the hardware 
> provides it. No need to make 'every' conceivable piece of IBS 
> data useful straight away.
> 
> All i want is at least *one* common usecase to work fine. This 
> allows us to see things in practice and it also provides the 
> seed for further improvements.
> 
> Right now this does not seem to be the case: the 'report' 
> portion only reports a raw hexa dump, not very useful to users.
> 
> Once something like 'perf report' works for some useful looking 
> sub-case you can also tack on all the extra IBS goodies that 
> specialized tools might need as well, i have no problem with 
> providing that.

Isn't that outlook I gave about pebs like implementation of the
precise bit with IBS "useful enough"? This would be on top patches
anyway, so no need to hold back current patches.

-Robert

-- 
Advanced Micro Devices, Inc.
Operating System Research Center

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