Re: Locking comment on shrink_caches()

Alan Cox (alan@lxorguk.ukuu.org.uk)
Wed, 26 Sep 2001 18:40:15 +0100 (BST)

> PIII:
> nothing: 32 cycles
> locked add: 50 cycles
> cpuid: 170 cycles
>
> P4:
> nothing: 80 cycles
> locked add: 184 cycles
> cpuid: 652 cycles

Original core Athlon (step 2 and earlier)

nothing: 11 cycles
locked add: 22 cycles
cpuid: 67 cycles

generic Athlon is

nothing: 11 cycles
locked add: 11 cycles
cpuid: 64 cycles

I don't currently have a palomino core to test

Wait for AMD to publish graphs of CPUid performance for PIV versus Athlon 8)

Alan
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