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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
slide3

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

slide4

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

slide5

Peak on Node: 3100 MB/s

Peak off Node: 1250 MB/s

Latency on Node: 3.1e-06

Latency off Node: 2.3e-05

slide6

Latency on Node: 2.1e-06

Latency off Node: 1.3e-05

slide7

Latency on Node: 3.9e-06

Latency off Node: 1.0e-05

slide8

Peak on Node: 2800 MB/s

Peak off Node: 1250 MB/s

slide9

Peak on Node: 2900 MB/s

Peak off Node: 1230 MB/s

slide16

1.7e-05

1.3e-05

slide20

Latency on Node: 9.1e-06

Latency off Node: 3.1e-05

slide22
FFTs
  • Comparing ESSL/PESSL and FFTW
slide23

Phase2

Starting ~15usecs

Phase1

slide25

Phase2

Phase1

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