Messages in this thread | | | Date | Thu, 22 Mar 2007 23:52:05 -0700 (PDT) | From | Christoph Lameter <> | Subject | Re: [QUICKLIST 1/5] Quicklists for page table pages V4 |
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On Thu, 22 Mar 2007, Andrew Morton wrote:
> On Thu, 22 Mar 2007 23:28:41 -0700 (PDT) Christoph Lameter <clameter@sgi.com> wrote: > > > 1. Proven code from the IA64 arch. > > > > The method used here has been fine tuned for years and > > is NUMA aware. It is based on the knowledge that accesses > > to page table pages are sparse in nature. Taking a page > > off the freelists instead of allocating a zeroed pages > > allows a reduction of number of cachelines touched > > in addition to getting rid of the slab overhead. So > > performance improves. > > By how much?
About 40% on fork+exit. See
http://marc.info/?l=linux-ia64&m=110942798406005&w=2
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