linux-kernel - Re: [PATCH 8/8] perf, tools, test: Add test case for alias and JSON parsing

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Message-ID: <20140314211230.GA22728@two.firstfloor.org>
Date:	Fri, 14 Mar 2014 22:12:30 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>, acme@...radead.org,
	mingo@...nel.org, linux-kernel@...r.kernel.org,
	peterz@...radead.org, eranian@...gle.com, namhyung@...nel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 8/8] perf, tools, test: Add test case for alias and
 JSON parsing

> I think the problem is in parse_events_fixup, which assumes
> the 'cpu' pmu globaly for all events

I investigated this now. The problem is that the event is listed,
but cannot be set up. I saw it also with 'data_writes' on another
system. 

That's a generic problem, the test just exposes it. It's a side effect
of the fragile kernel->user interface in perf and likely hard to fix.

The only thing I can do is to ignore failures here and only
print messages.

-Andi
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