linux-kernel - Re: [PATCH/RFC v1 0/2] Human readable performance event description in sysfs

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Date:	Wed, 20 Jan 2010 13:55:53 +0000
From:	Russell King - ARM Linux <linux@....linux.org.uk>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Jamie Iles <jamie.iles@...ochip.com>, jpihet@...sta.com,
	p.osciak@...sung.com, will.deacon@....com,
	Michał Nazarewicz <m.nazarewicz@...sung.com>,
	linux-kernel@...r.kernel.org, kyungmin.park@...sung.com,
	mingo@...e.hu, m.szyprowski@...sung.com,
	linux-arm-kernel@...ts.infradead.org,
	Tomasz Fujak <t.fujak@...sung.com>
Subject: Re: [PATCH/RFC v1 0/2] Human readable performance event
	description in sysfs

On Wed, Jan 20, 2010 at 02:39:39PM +0100, Peter Zijlstra wrote:
> Furthermore, /proc/cpuinfo should be enough information to come up with
> an arch specific set of events to be translated into raw.

Unfortunately, it isn't.  CPU identification has become a fairly murky
business on ARM that the information exported from /proc/cpuinfo can
no longer precisely identify the CPU itself.

For example, we just treat Cortex A8 and A9 as "ARMv7" because from the
kernel's point of view, they're the same.
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