Messages in this thread | | | Date | Sat, 16 Jan 2010 12:33:13 +0000 | From | Sitsofe Wheeler <> | Subject | Re: Ubuntu 32-bit, 32-bit PAE, 64-bit Kernel Benchmarks |
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On Fri, Jan 15, 2010 at 05:49:06PM -0800, H. Peter Anvin wrote: > On 12/30/2009 05:29 PM, Yuhong Bao wrote: > > > > Given that Linus was once talking about the performance penalties of > > PAE and HIGHMEM64G, perhaps you'd find these benchmarks done by > > Phoronix of interest: > > http://www.phoronix.com/scan.php?page=article&item=ubuntu_32_pae > > > > The big difference isn't between HIGHMEM4G (no PAE) and HIGHMEM64G > (PAE), it's between HIGHMEM and !HIGHMEM. That cutoff is ~892 MB for a > stock 32-bit kernel.
Thanks for the clarification - I had been wondering about why those settings had been benchmarked against each other...
I took a mild interest because I have an EeePC 900 with 1G of RAM. The machine can do PAE but my understanding is that this would lead to a performance drop (I currently have VMSPLIT_3G so I can use all 1G of memory) so I run it without HIGHMEM.
-- Sitsofe | http://sucs.org/~sits/
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