linux-kernel - Re: [PATCH 1/2] tools, perf: Add a precise event qualifier v2

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Date:	Fri, 13 Sep 2013 10:48:02 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Andi Kleen <andi@...stfloor.org>, Ingo Molnar <mingo@...nel.org>,
	Vince Weaver <vince@...ter.net>, acme@...radead.org,
	linux-kernel@...r.kernel.org,
	Stephane Eranian <eranian@...gle.com>,
	torvalds@...ux-foundation.org, trinity@...r.kernel.org,
	Thomas Gleixner <tglx@...utronix.de>,
	Frédéric Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...il.com>
Subject: Re: [PATCH 1/2] tools, perf: Add a precise event qualifier v2

> Typically PMU drivers are per arch and all the format stuff is per pmu
> driver so I'd not worry about that just yet.

That's a good point. So hard coded numbers would be fine for now.

> Yes, that is an unfortunate situation. I (and either Acme or Jolsa)
> tried wrapping the bitfield in an anonymous union to create a named
> variable for the entire u64 but older GCC completely fails with that.

In theory it's possible by parsing readelf output.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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