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Federation

Federation. LAPI and FFTs. New LAPI. Packet size has doubled (from 936 bytes to 1960) Can use UDP as well as US protocols Inline completion handlers New polling functions DGSP and associated LAPI Utils New data structures Statistics. Phase 1. Peak on Node: 2800 MB/s

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Federation

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  1. Federation LAPI and FFTs

  2. New LAPI • Packet size has doubled (from 936 bytes to 1960) • Can use UDP as well as US protocols • Inline completion handlers • New polling functions • DGSP and associated LAPI Utils • New data structures • Statistics

  3. Phase 1 Peak on Node: 2800 MB/s Peak off Node: 230 MB/s Get Bandwidth Latency on Node: 2.2e-05 Latency off Node: 9.8e-05 Get Latency

  4. Phase 1 Peak on Node: 2100 MB/s Peak off Node: 230 MB/s Put Bandwidth Latency on Node: 1.4e-05 Latency off Node: 5.5e-05 Put Latency

  5. Peak on Node: 3100 MB/s Peak off Node: 1250 MB/s Latency on Node: 3.1e-06 Latency off Node: 2.3e-05

  6. Latency on Node: 2.1e-06 Latency off Node: 1.3e-05

  7. Latency on Node: 3.9e-06 Latency off Node: 1.0e-05

  8. Peak on Node: 2800 MB/s Peak off Node: 1250 MB/s

  9. Peak on Node: 2900 MB/s Peak off Node: 1230 MB/s

  10. 1.7e-05 1.3e-05

  11. Latency on Node: 9.1e-06 Latency off Node: 3.1e-05

  12. FFTs • Comparing ESSL/PESSL and FFTW

  13. Phase2 Starting ~15usecs Phase1

  14. Phase2 Phase1

  15. Phase2

  16. Phase1

  17. Phase2

  18. Phase1

  19. Phase2

  20. Phase1

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