Re: Locking comment on shrink_caches()

From: Dave Jones (
Date: Wed Sep 26 2001 - 13:40:32 EST

On Wed, 26 Sep 2001, Linus Torvalds wrote:

> > > cpuid: 72 cycles
> > cpuid: 79 cycles
> > Only slightly worse, but I'd not expected this.
> That difference can easily be explained by the compiler and options.

Actually repeated runs of the test on that box show it deviating by up
to 10 cycles, making it match the results that Alan posted.
-O2 made no difference, these deviations still occur. They seem more
prominent on the C3 than other boxes I've tried, even with the same
compiler toolchain.



| Dave Jones.
| SuSE Labs

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