Messages in this thread | | | Date | Mon, 12 Sep 2005 16:09:14 -0400 | From | Sonny Rao <> | Subject | Re: 2.6.13-mm3 |
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On Mon, Sep 12, 2005 at 12:56:41PM -0700, Andrew Morton wrote: > Sonny Rao <sonny@burdell.org> wrote: > > > > On Mon, Sep 12, 2005 at 02:43:50AM -0700, Andrew Morton wrote: > > <snip> > > > - There are several performance tuning patches here which need careful > > > attention and testing. (Does anyone do performance testing any more?) > > <snip> > > > > > > - The size of the page allocator per-cpu magazines has been increased > > > > > > - The page allocator has been changed to use higher-order allocations > > > when batch-loading the per-cpu magazines. This is intended to give > > > improved cache colouring effects however it might have the downside of > > > causing extra page allocator fragmentation. > > > > > > - The page allocator's per-cpu magazines have had their lower threshold > > > set to zero. And we can't remember why it ever had a lower threshold. > > > > > > > What would you like? The usual suspects: SDET, dbench, kernbench ? > > > > That would be a good start, thanks. The higher-order-allocations thing is > mainly targeted at big-iron numerical computing I believe.
I assume you're referring to allocating huge pages? I'm not sure how one would test this other than allocating N huge pages, releasing, runing something intensive (like SDET), and then trying to allocate N huge pages again? Or am I off base here?
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