linux-kernel - Re: [BUG] perf tests: Test converting perf time to TSC

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Message-ID: <20131003085807.GO26785@twins.programming.kicks-ass.net>
Date:	Thu, 3 Oct 2013 10:58:07 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	Jiri Olsa <jolsa@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [BUG] perf tests: Test converting perf time to TSC

On Thu, Oct 03, 2013 at 10:56:25AM +0200, Peter Zijlstra wrote:
> > No the ABI is broken in that case - better to crash.
> 
> No; neither case should crash.

OK; previously we would report cap_usr_time = 1 even though we might not
have written stuff into the fields; which would indeed explain the
crash.

However; Jiri actually has the patch; as the code he posted had 'user' not
'usr'
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