On 2/16/2010 12:12, Don Guinn wrote: > On Mon, Feb 15, 2010 at 7:42 PM, bill lam<[email protected]> wrote: > >> . . . Given the large memory cache available in modern >> computer, it is better to just keep memory reference locality. The >> speed of transfer of data using socket would be slower than that >> within cache by at least 2 order of magnitude, just wild guess. . . . >> >> This touches on a question I have been wondering about. Is the cache shared > among multiple cores or does each one have its own cache? I would be > surprised if it is shared as that could result in a big performance hit if > there are lots of cores. If the cache is private to each core then somehow > the data has to be moved from one cache to another. Main memory? > ---------------------------------------------------------------------- > For information about J forums see http://www.jsoftware.com/forums.htm >
http://en.wikipedia.org/wiki/L2_cache -- David Mitchell ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm
