Optimized copy&move (was: Re: [PATCH] Mantaining turnstile
aligned to 128 bytes in i386 CPUs)
dwmalone at maths.tcd.ie
Sun Jan 21 03:13:31 UTC 2007
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.
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