linux-kernel - Re: [PATCH] RFC: perf, tools: Move gtk browser into separate perfgtk executable

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Date:	Wed, 14 Aug 2013 11:13:01 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Vince Weaver <vince@...ter.net>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Christoph Hellwig <hch@...radead.org>,
	Andi Kleen <andi@...stfloor.org>, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>,
	Namhyung Kim <namhyung.kim@....com>, peterz@...radead.org
Subject: Re: [PATCH] RFC: perf, tools: Move gtk browser into separate perfgtk
 executable

Em Tue, Aug 13, 2013 at 05:57:16PM -0400, Vince Weaver escreveu:
> On Tue, 13 Aug 2013, Ingo Molnar wrote:
> > that can only be addressed by either extending 'perf test' or by testing 
> > libpfm et al sooner. The upstream kernel can only address regressions that 
> > get reported.
 
> Most of the tests in my test-suite are reactive.  Meaning, I wrote them 
> after an ABI-breaking change was reported elsewhere, and I needed a small 
> test case for bisection purposes.  Thus they are good for finding if a 
> corner of the perf ABI re-breaks but they're not great at spotting new 
> breakages.
 
> Writing a complete test suite for something as complicated as the 
> perf-event ABI is impractical.  One thing you can do is require anyone 
> submitting new functionality also provide a regression test, but

Agreed.

> I don't see that happening.

See some of Namhyung, Adrian and Jiri recent patchsets, they came with
'perf test' regression tests.
 
- ARnaldo
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