Re: Optimized copy&move (was: Re: [PATCH] Mantaining turnstile aligned to 128 bytes in i386 CPUs)

From: David Malone <dwmalone_at_maths.tcd.ie>
Date: Sat, 20 Jan 2007 21:51:03 +0000
On Thu, Jan 18, 2007 at 11:16:19AM +1100, Bruce Evans wrote:
> - the FPU routines are faster on Athlons (XP and 64 at least), but these
>   didn't exist until 2001.  The introduction of these CPUs may have
>   been the trigger for turning off the FPU routines in -current in 2001.
>   Until then problems were limited to Pentium-1's since the dynamic
>   configuration prevented the routines being used on all other machines.

I think a very quirky K6-2 machine that I had let us reproduce the
problem fairly dependably and may have been part of the reason it
was finally turned off.

	David.
Received on Sun Jan 21 2007 - 02:13:31 UTC

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