Lessons Learned

• MSP performance is often as good as or better than the T90

• MSP execution can approach factor-of-four speedup over SSP

  • Even more in some cases, due to larger effective cache

• Can be 30% - 200% better than “naïve” autotasking over four SSPs

  • Tighter hardware integration
  • Less contention for memory bandwidth

• Single-SSP loop nest optimizations generally seem to be best

• Must think about the cache!

• Eliminate conditions that (currently) inhibit streaming, e.g.

  • Data dependencies
  • I/O
  • Reduction operations

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