Messages in this thread |  | | Date | Thu, 27 Sep 2001 03:34:22 +0200 | From | Vojtech Pavlik <> | Subject | Re: Locking comment on shrink_caches() |
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On Thu, Sep 27, 2001 at 03:29:27AM +0200, Trond Eivind Glomsr?d wrote:
> Vojtech Pavlik <vojtech@suse.cz> writes: > > > On Wed, Sep 26, 2001 at 10:20:21PM +0200, Vojtech Pavlik wrote: > > > > > > generic Athlon is > > > > > > > > nothing: 11 cycles > > > > locked add: 11 cycles > > > > cpuid: 64 cycles > > > > > > Interestingly enough, my TBird 1.1G insist on cpuid being somewhat > > > slower: > > > > > > nothing: 11 cycles > > > locked add: 11 cycles > > > cpuid: 87 cycles > > > > Oops, this is indeed just a difference in compiler options. > > No, it's not: > > [teg@xyzzy teg]$ ./t > nothing: 11 cycles > locked add: 11 cycles > cpuid: 64 cycles > [teg@xyzzy teg]$ ./t > nothing: 11 cycles > locked add: 11 cycles > cpuid: 64 cycles > [teg@xyzzy teg]$ > [teg@xyzzy teg]$ ./t > nothing: 11 cycles > locked add: 11 cycles > cpuid: 87 cycles > [teg@xyzzy teg]$ ./t > nothing: 11 cycles > locked add: 11 cycles > cpuid: 87 cycles > [teg@xyzzy teg]$ ./t > nothing: 11 cycles > locked add: 11 cycles > cpuid: 64 cycles
Interesting: Try while true; do t; done and watch it change between 64 and 87 every 2.5 seconds ... :)
-- Vojtech Pavlik SuSE Labs - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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