Subject: Re: [Cbe-oss-dev] [RFC, PATCH 4/4] Add support to OProfile for profiling Cell BE SPUs -- update

From: Arnd Bergmann <[email-masked]>
Date: Sat, 3 Feb 2007 08:40:05 +0100

On Friday 02 February 2007 17:47, Maynard Johnson wrote:
> 
> > We also want to be able to profile the context switch code itself, which
> > means that we also need one event buffer associated with the kernel to
> > collect events that for a zero context_id.
> The hardware design precludes tracing both SPU and PPU simultaneously.
> 
I mean the SPU-side part of the context switch code, which you can find
in arch/powerpc/platforms/cell/spufs/spu_{save,restore}*.

This code is the one that runs when context_id == 0 is passed to the
callback.

	Arnd <><