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www.openfabrics.org Intel MPI OFA Experience Alexander.Supalov@intel.com German.Voronov@intel.com Sean Hefty (don’t shoot the messenger)
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2 www.openfabrics.org Performance OFA uDAPL is the best fit for Intel MPI uDAPL within 10% of native verbs Mellanox: 2.8 vs. 2.6 usecs Qlogic: 4.5 vs 4.1 usecs The results are NetPipe uDAPL vs. verbs
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3 www.openfabrics.org Usability uDAPL compatibility required between Linux and Windows Calling conventions must match Interoperability testing needed Need to know Endianess and size of keys uDAPL requires IPoIB Can we do without?
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4 www.openfabrics.org Usability Improve connection scaling Longer timeouts Faster connection setup Want fewer user controls settable only by root Is there a way to speed up distros adoption rate?
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5 www.openfabrics.org uDAPL uDAPL provider behavior differs from vendor to vendor Intel MPI needs special treatment for each provider Different interpretations of the DAT standard iWarp: active side of connection must send the data first Want support for uDAPL 2.0 spec with 1.x compatible library
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