Hello all, I just wanted to comment that these runs are extremely valuable and I am glad to see us getting this much information about the performance and overheads. This is one of the main values of DC1, I think. Great work to all involved!
Jeff > From: Jonathan Myers <[EMAIL PROTECTED]> > Reply-To: LSST Data Management <[email protected]> > Date: Tue, 03 Oct 2006 16:59:29 -0700 > To: LSST Data Management <[email protected]> > Subject: [LSST-data] Using both cores of our nodes > > All, > > I've committed r.557 into subversion, which is a simple modification to > SetupHarnessPipeline.py. It lists every element of PBS_NODEFILE twice > in our nodelist, which actually doubles our MPI universe size and > doubles the number of stageslices on each node. > > This seems to work without breaking anything and yields about a speedup > of about 1.5. > > I managed to run 5 of our 6 stages with 6 CCDs/node (our original number > from the design) and get each image through the pipeline in about 93 > seconds (latency of 93 sec). > > It's worth noting that this speedup of 1.5 for using both cores is > different from the speedup of 2 for halving the number of CCDs/node, and > probably more realistic. > > Cheers, > -Jon > _______________________________________________ > LSST-data mailing list > [email protected] > http://www.lsstmail.org/mailman/listinfo/lsst-data > _______________________________________________ LSST-data mailing list [email protected] http://www.lsstmail.org/mailman/listinfo/lsst-data
