Re: 2.6.0 Huge pages not working as expected

[William Lee Irwin III]

On Fri, Dec 26, 2003 at 10:54:33AM +0000, Nick Craig-Wood wrote:
> I wrote a little test program to show the benefits of huge pages by
> reducing TLB thrashing - it fills up 16 MB with sequential numbers
> then adds them with different strides - very much the sort of thing
> FFTs do.  However huge pages show a performance decrease not increase
> for large strides!  For smaller ones there is a small speedup.
> I've been testing on
> processor       : 0
> vendor_id       : GenuineIntel
> cpu family      : 6
> model           : 8
> model name      : Pentium III (Coppermine)

P-III has something like 2 TLB entries usable for large pages.
I recommend trying this again on a P-IV.


-- wli
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