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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

Federation

LAPI and FFTs


New lapi
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

Peak off Node: 230 MB/s

Get Bandwidth

Latency on Node: 2.2e-05

Latency off Node: 9.8e-05

Get Latency


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


Peak on Node: 3100 MB/s

Peak off Node: 1250 MB/s

Latency on Node: 3.1e-06

Latency off Node: 2.3e-05


Latency on Node: 2.1e-06

Latency off Node: 1.3e-05


Latency on Node: 3.9e-06

Latency off Node: 1.0e-05


Peak on Node: 2800 MB/s

Peak off Node: 1250 MB/s


Peak on Node: 2900 MB/s

Peak off Node: 1230 MB/s


1.7e-05

1.3e-05


Latency on Node: 9.1e-06

Latency off Node: 3.1e-05


FFTs

  • Comparing ESSL/PESSL and FFTW


Phase2

Starting ~15usecs

Phase1


Phase2

Phase1








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