linux-kernel - Re: [PATCH 3/3] perf tool: Add non arch events for SandyBridge microarchitecture

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Message-ID: <alpine.DEB.2.02.1212211305300.13284@pianoman.cluster.toy>
Date:	Fri, 21 Dec 2012 13:07:38 -0500 (EST)
From:	Vince Weaver <vince@...ter.net>
To:	Jiri Olsa <jolsa@...hat.com>
cc:	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>, Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>
Subject: Re: [PATCH 3/3] perf tool: Add non arch events for SandyBridge
 microarchitecture

On Thu, 20 Dec 2012, Jiri Olsa wrote:

> BR_MISP_EXEC.ALL_BRANCHES,event=0x89,umask=0xff
> BR_MISP_EXEC.COND,event=0x89,umask=0x1
> BR_MISP_EXEC.DIRECT_NEAR_CALL,event=0x89,umask=0x10
> BR_MISP_EXEC.INDIRECT_JMP_NON_CALL_RET,event=0x89,umask=0x4
> BR_MISP_EXEC.INDIRECT_NEAR_CALL,event=0x89,umask=0x20
> BR_MISP_EXEC.NONTAKEN,event=0x89,umask=0x40
> BR_MISP_EXEC.RETURN_NEAR,event=0x89,umask=0x8
> BR_MISP_EXEC.TAKEN,event=0x89,umask=0x80
> 

I hate to sound like a broken record here, but, again, what's the 
rationalization for not using libpfm4 here?

Is it simply NIH or is there some sort of technical reason?  It seems a 
lot of wasted effort to create all these tables one chip at a time when 
libpfm4 already has well-tested and debugged event tables for most CPUs 
with perf_event support.

Vince
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