On 11/12/2012 09:23 PM, David Knezevic wrote: > On 11/06/2012 05:24 PM, Kirk, Benjamin (JSC-EG311) wrote: >> Dave, my ultimate fix for you will be extending this to write >> >> for node… >> for vec… >> for var… >> for comp… >> >> or some permutation thereof, which will necessitate writing all the reduced >> basis vectors to a single file, in order to get maximum performance. I >> assume that's OK with you? >> > Hi Ben, > > I've tried out the new RB IO on a problem with a "merged" .xdr file that > is 301MB --- previously I read this data in as many separate .xdr files > each of size 130kB. > > In serial, it took about 22 seconds to do the read in the merged case > (i.e. RBEvaluation::read_in_vectors() took 22 seconds) vs. about 42 > seconds in the "separated" case. > > So it gives a 2x speedup, which is very helpful indeed. Though I recall > that a 30x speedup didn't seem out of the question --- are there > possibly some parameters (block sizes, etc, like before?) that I can try > tweaking to see if we can speed up the merged case further?
P.S. It occurred to me that it's worth benchmarking RBEvaluation::read_in_vectors in a bit more detail, and 19 of the 22 seconds is spent in System::read_serialized_vectors(). (The last 3 seconds in mostly due to the vector allocation.) David ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Libmesh-devel mailing list Libmesh-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmesh-devel
