http://blogs.cisco.com Thu, 23 May 2013 18:02:52 +0000 en-US hourly 1 http://blogs.cisco.com/performance/latency-analogies-part-2/ http://blogs.cisco.com/performance/latency-analogies-part-2/#comments Mon, 08 Apr 2013 13:25:07 +0000 Jeff Squyres http://blogs.cisco.com/?p=108123 I talked about latency analogies .  I compared levels of latencies to your home, your neighborhood, a far-away neighborhood, and [...]]]> http://blogs.cisco.com/performance/latency-analogies-part-2/feed/ 0 http://blogs.cisco.com/performance/latency-analogies/ http://blogs.cisco.com/performance/latency-analogies/#comments Sun, 31 Mar 2013 13:00:35 +0000 Jeff Squyres http://blogs.cisco.com/?p=108092 http://blogs.cisco.com/performance/latency-analogies/feed/ 3 http://blogs.cisco.com/performance/process-and-memory-affinity-why-do-you-care/ http://blogs.cisco.com/performance/process-and-memory-affinity-why-do-you-care/#comments Thu, 31 Jan 2013 13:00:48 +0000 Jeff Squyres http://blogs.cisco.com/?p=99160 NUMA effects and process affinity on this blog lots of times in the past.  It’s a complex topic that has a [...]]]> http://blogs.cisco.com/performance/process-and-memory-affinity-why-do-you-care/feed/ 0 http://blogs.cisco.com/performance/process-affinity-in-ompi-v1-7-part-2/ http://blogs.cisco.com/performance/process-affinity-in-ompi-v1-7-part-2/#comments Tue, 11 Sep 2012 12:00:44 +0000 Jeff Squyres http://blogs.cisco.com/?p=82213 In my last post , I described the Simple mode of Open MPI v1.7′s process affinity system. The Simple mode is actually quite flexible, [...]]]> http://blogs.cisco.com/performance/process-affinity-in-ompi-v1-7-part-2/feed/ 0 http://blogs.cisco.com/performance/process-affinity-in-ompi-v1-7-part-1/ http://blogs.cisco.com/performance/process-affinity-in-ompi-v1-7-part-1/#comments Fri, 07 Sep 2012 18:32:03 +0000 Jeff Squyres http://blogs.cisco.com/?p=82191 In my last post , I mentioned that we just finished a complete revamp of the Open MPI process affinity system, and provided only [...]]]> http://blogs.cisco.com/performance/process-affinity-in-ompi-v1-7-part-1/feed/ 0 http://blogs.cisco.com/performance/taking-mpi-process-affinity-to-the-next-level/ http://blogs.cisco.com/performance/taking-mpi-process-affinity-to-the-next-level/#comments Fri, 31 Aug 2012 20:33:29 +0000 Jeff Squyres http://blogs.cisco.com/?p=81694 http://blogs.cisco.com/performance/taking-mpi-process-affinity-to-the-next-level/feed/ 4 http://blogs.cisco.com/performance/registered-memory-imbalances/ http://blogs.cisco.com/performance/registered-memory-imbalances/#comments Sat, 23 Jun 2012 11:36:41 +0000 Jeff Squyres http://blogs.cisco.com/?p=74262 prior blog posts , I’ve talked about the implications of registered memory for both MPI applications and implementations. Here’s another fun implication [...]]]> http://blogs.cisco.com/performance/registered-memory-imbalances/feed/ 2 http://blogs.cisco.com/performance/open-mpi-v1-5-processor-affinity-options/ http://blogs.cisco.com/performance/open-mpi-v1-5-processor-affinity-options/#comments Fri, 09 Mar 2012 13:00:13 +0000 Jeff Squyres http://blogs.cisco.com/?p=63117 Ralph Castain , Senior Architecture in the Advanced R&D group at Greenplum , an EMC [...]]]> http://blogs.cisco.com/performance/open-mpi-v1-5-processor-affinity-options/feed/ 0 http://blogs.cisco.com/performance/hardware-locality-1-2-1-and-1-3rc1-released/ http://blogs.cisco.com/performance/hardware-locality-1-2-1-and-1-3rc1-released/#comments Tue, 23 Aug 2011 11:27:13 +0000 Jeff Squyres http://blogs.cisco.com/?p=40515 http://blogs.cisco.com/performance/hardware-locality-1-2-1-and-1-3rc1-released/feed/ 0 http://blogs.cisco.com/performance/more-on-memory-affinity/ http://blogs.cisco.com/performance/more-on-memory-affinity/#comments Fri, 18 Mar 2011 15:35:02 +0000 Jeff Squyres http://blogs.cisco.com/?p=23945 Unexpected Linux Memory Migration “) which brought out a number of good points. [...]]]> http://blogs.cisco.com/performance/more-on-memory-affinity/feed/ 0