Re: 2.4 PATCH: gcc 3.3 support

From: Bjorn Helgaas <bjorn.helgaas_at_hp.com>
Date: 2003-08-07 01:59:34
On Wednesday 06 August 2003 9:44 am, H. J. Lu wrote:
> This is the patch backed ported from 2.6 kernel. However, I got
> 
> # modprobe xor
> raid5: measuring checksumming speed
>    ia64      :    81.920 MB/sec
> 
> The old one I got
> 
> # modprobe xor
> raid5: measuring checksumming speed
>    8regs     :  1769.472 MB/sec
>    8regs_prefetch:  1753.088 MB/sec
>    32regs    :  2064.384 MB/sec
>    32regs_prefetch:  2064.384 MB/sec
>    ia64      :  2441.216 MB/sec
> raid5: using function: ia64 (2441.216 MB/sec)
> 
> It is very strange.

That *is* very strange.  I'll wait to apply the patch until we understand
what's happening.  Have you tried the 2.6 kernel to see what speeds it
measures?

Bjorn

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Received on Wed Aug 6 12:19:39 2003

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