On Friday, 7 December 2018 21:41:41 UTC+1, Markus Wageringel wrote: > > Am Freitag, 7. Dezember 2018 13:07:45 UTC+1 schrieb Bill Hart: >> >> How many physical cores do you have on the machine (not logical cores), >> and how many CPU sockets and what is the cache structure? (I assume it is >> at least 16 physical cores, but I'm asking more because this sort of thing >> often happens because of shared caches.) >> > > It has 2 CPU sockets, each having 8 physical cores with 2 threads each. As > for the cache: > > L1d cache: 32K > L1i cache: 32K > L2 cache: 256K > L3 cache: 20480K > > Does this answer the question? Also, here is a specification: > https://ark.intel.com/products/64584/Intel-Xeon-Processor-E5-2660-20M-Cache-2-20-GHz-8-00-GT-s-Intel-QPI- >
I don't know for sure, but it looks like it has a shared L3 cache across many cores in each socket. I wouldn't be terribly surprised if this was relevant. Of course, only an extended effort with many timings could confirm this for sure. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at https://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
