Re: [Xen-devel] [RFC][PATCH] 2/3] [TOOLS][XENTRACE] Update tools to write data to disk in a known endian'ness.

[Tony Breeds <tony@xxxxxxxxxxxxxxxxxx>]

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

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