Physics – High Energy Physics – High Energy Physics - Lattice
Scientific paper
2009-10-01
PoS LATTICE2008:026,2008
Physics
High Energy Physics
High Energy Physics - Lattice
7 pages, 1 figure, presented at Lattice 2008 (Algorithms and Machines), College of William and Mary, Williamsburg, VA
Scientific paper
We present results of the implementation of one MILC lattice QCD application-simulation with dynamical clover fermions using the hybrid-molecular dynamics R algorithm-on the Cell Broadband Engine processor. Fifty-four individual computational kernels responsible for 98.8% of the overall execution time were ported to the Cell's Synergistic Processing Elements (SPEs). The remaining application framework, including MPI-based distributed code execution, was left to the Cell's PowerPC processor. We observe that we only infrequently achieve more than 10 GFLOPS with any of the kernels, which is just over 4% of the Cell's peak performance. At the same time, many of the kernels are sustaining a bandwidth close to 20 GB/s, which is 78% of the Cell's peak. This indicates that the application performance is limited by the bandwidth between the main memory and the SPEs. In spite of this limitation, speedups of 8.7x (for 8x8x16x16 lattice) and 9.6x (for 16x16x16x16 lattice) were achieved when comparing a 3.2 GHz Cell processor to a single core of a 2.33 GHz Intel Xeon processor. When comparing the code scaled up to execute on a dual-Cell blade and a quad-core dual-chip Intel Xeon blade, the speedups are 1.5x (8x8x16x16 lattice) and 4.1x (16x16x16x16 lattice).
Gottlieb Steven
Kindratenko Volodymyr
Shi Guochun
No associations
LandOfFree
Cell processor implementation of a MILC lattice QCD application does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cell processor implementation of a MILC lattice QCD application, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cell processor implementation of a MILC lattice QCD application will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-25478