Author: Vasik Rajlich
Date: 08:18:47 02/06/06
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On February 05, 2006 at 23:49:39, Jay Urbanski wrote: >On February 05, 2006 at 06:10:55, Vasik Rajlich wrote: > >>On February 04, 2006 at 12:19:33, dhanial wrote: >> >>>What is the best hash table settings for rybka for 10 to 15 min games and for 1 >>>to 3 min games. >> >>For all time controls, as high as possible, provided that there is no swapping >>to disk. >> >>Vas > >This is not actually true on all systems. For instance, if you have dual >processor Opteron it would behoove you to keep the hash size to under half your >physical memory at least, because Opteron systems are NUMA and access to memory >attached to the non-local CPU is higher than latency to memory attached to the >CPU your process is running on. It's about 60-80ns latency for local memory and >about 100-120ns for 1-hop away. Aha, thanks, it's good to know. Vas
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