Author: Vincent Diepeveen
Date: 08:58:53 09/18/03
Go up one level in this thread
On September 18, 2003 at 11:53:11, Robert Hyatt wrote: >On September 18, 2003 at 11:14:09, Vincent Diepeveen wrote: > >>On September 18, 2003 at 11:06:13, Robert Hyatt wrote: >> >>>On September 18, 2003 at 03:50:11, Gian-Carlo Pascutto wrote: >>> >>>>On September 17, 2003 at 16:03:09, Robert Hyatt wrote: >>>> >>>>>On September 17, 2003 at 14:54:41, Vincent Diepeveen wrote: >>>>> >>>>>>On September 17, 2003 at 14:47:49, Robert Hyatt wrote: >>>>>> >>>>>>lower clocked opterons are like $300, so i am pretty sure there is a big demand >>>>>>already. >>>>> >>>>>No there isn't, because for single and dual machines, the NUMA issue can >>>>>pretty well be ignored >>>> >>>>Ignored? You _will_ get a performance handicap if you do so. >>>> >>>>-- >>>>GCP >>> >>>Yes, but on a dual it is a _minimal_ handicap. >> >>You only going to run Crafty dual? >> >>Best regards, >>Vincent > > >Any remote chance you will ever join a conversation and make any >sense? You say you have nothing to do with NUMA, but on the other hand say also crafty will run on more than 1 node. Or do i make up from this all that you only will run dual because each node is a dual NUMA? Further i hope you realize that the speed of 100Mhz RAM at quad xeon 700Mhz box is relatively faster than memory at a 2.2Ghz opteron box, even though local memory there is 2 times faster than at a dual P4 Xeon box you got now. So not taking that NUMA issue serious is a typical Hyatt viewpoint. As you can see from specint, with just 2.6MB working set at the big processors with a lot of L2 cache, you already need > 10% system time to the slow RAM at very slow processors a few years ago. Nowadays top processors are way faster so it is trivial that NUMA issues will be at least > 10% of your worry. Best regards, Vincent
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