Features, optimizations, and tricks for the Blue Gene platform
The IBM and Argonne teams have been digging into ROMIO’s collective I/O performance on the Mira supercomputer. These optimizations made it into the MPICH-3.1.1 release, so it seemed like a good time to write up a bit about these optimizations. no more “bglockless“: for Blue Gene /L and Blue Gene /P we wrote a ROMIO …
The Blue Gene /L machine came out of IBM’s research division, and then became a product. This unusual lineage resulted in its software stack using a bit more open source technology than usual. For example, ROMIO provides the underlying MPI-IO implementation instead of IBM’s PE product. Hao Yu published a paper at HPCA 2006 describing …