From mboxrd@z Thu Jan  1 00:00:00 1970
From: Arnd Bergmann <arnd@arndb.de>
Subject: Re: powerpc/cell/cpufreq: add spu aware cpufreq governor
Date: Tue, 8 Jul 2008 08:43:43 +0200
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To: Dave Jones <davej@codemonkey.org.uk>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>, cpufreq@lists.linux.org.uk, linuxppc-dev@ozlabs.org, Jeremy Kerr <jk@ozlabs.org>, Benjamin Herrenschmidt <benh@kernel.crashing.org>, cbe-oss-dev@ozlabs.org

On Monday 07 July 2008, Dave Jones wrote:
> One question I do have though, is how userspace scripts are supposed
> to know they're to echo cbe_spu_governor into the relevant parts of
> sysfs. =A0I've not used anything with a cell. Do they expose the SPUs
> as regular CPUs, or do they show up in a different part of the tree?

An SPU is very different from a CPU from the user perspective.
SPUs show up in /sys/devices/system/spus, and if a user wants to access
them, the "spufs" file system needs to be mounted in the system, by
convention on /spu. =


	Arnd <><

From mboxrd@z Thu Jan  1 00:00:00 1970
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From: Arnd Bergmann <arnd@arndb.de>
To: Dave Jones <davej@codemonkey.org.uk>
Subject: Re: powerpc/cell/cpufreq: add spu aware cpufreq governor
Date: Tue, 8 Jul 2008 08:43:43 +0200
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	<20080707213105.GD4997@codemonkey.org.uk>
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On Monday 07 July 2008, Dave Jones wrote:
> One question I do have though, is how userspace scripts are supposed
> to know they're to echo cbe_spu_governor into the relevant parts of
> sysfs. =A0I've not used anything with a cell. Do they expose the SPUs
> as regular CPUs, or do they show up in a different part of the tree?

An SPU is very different from a CPU from the user perspective.
SPUs show up in /sys/devices/system/spus, and if a user wants to access
them, the "spufs" file system needs to be mounted in the system, by
convention on /spu.=20

	Arnd <><