Hello, Peter. You wrote 19 ???????? 2008 ?., 18:49:33: >> Is anyone looking at trying to add specific support for the >> hyper-transport based numa AMD systems? > You don't have to do anything. The penalty for remote access is hidden > with caching. It's only hugely large working sets that would show the > difference, and for those, the memory is probably set up interleaved to > average out the worst-case behaviour. It is not perfectly true. New Java versions have NUMA-aware memory allocator, which interacts with OS (Solaris is best an linux is much worse in providin adequate NUMA configuration information to userland) and this gives about +15% on 4-socket Opteron system and +200% on SunFire 15K with 72 sockets (of UltraSPARC, so SunFire expirience is not too releveant for FreeBSD) on typical benchmarks. -- // Black Lion AKA Lev Serebryakov <lev_at_FreeBSD.org>Received on Fri Sep 19 2008 - 14:09:22 UTC
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