Author: Bo Persson
Date: 23:34:42 09/01/03
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On September 02, 2003 at 00:14:02, Jeremiah Penery wrote: >On September 01, 2003 at 23:23:18, Robert Hyatt wrote: > >>On September 01, 2003 at 09:39:55, Jeremiah Penery wrote: >> >>>Any large (multi-node) SMP machine will have the same problem as NUMA with >>>respect to inter-node latency. SMP doesn't magically make node-to-node >>>communication any faster. >> >>Actually it does. SMP means symmetric. >> >>NUMA is _not_ symmetric. > >Of course. The acronym means "non uniform memory access". > >But if you think "symmetric" necessarily means "faster", maybe you'd better look >in a dictionary. No, but it means "equally fast". :-) The problem with NUMA is that, to the processor, memory speed depends on the memory address, which most programs don't take into account. Bo Persson
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