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xen-devel
Re: [Xen-devel] [RFC][PATCH] 2/3] [TOOLS][XENTRACE] Update tools to writ
On Thu, Nov 30, 2006 at 11:27:27AM -0500, George Dunlap wrote:
> Do you have an idea how much extra cpu this takes for high-bandwidth
> tracing?
I don't imagine that hton*() are that expensive, and fwrite already
buffers intreranll for 128k writes so with these patches you won't be
touching the disk anymore often.
> I'm using xentrace for performance analysis, and it's already got a
> measurable impact due to the disk bandwidth and copying. I'd like to
> keep that as minimal as possible.
To be honnest I'm not doing any tracing, this patchset is the start
required to use xentrace on PPC.
Yours Tony
linux.conf.au http://linux.conf.au/ || http://lca2007.linux.org.au/
Jan 15-20 2007 The Australian Linux Technical Conference!
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