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charmplusplus / charm

The Charm++ parallel programming system. Visit https://charmplusplus.org/ for more information.
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ibverbs immediatering test much slower than verbs #928

Closed jcphill closed 8 years ago

jcphill commented 8 years ago

Original issue: https://charm.cs.illinois.edu/redmine/issues/928

net-linux-x86_64-ibverbs-iccstaticon 64 cores of Stampede: test 3: initiated [immediatering (gengbin)] test 3: completed (33.43 sec) test 31: initiated [multi immediatering (gengbin)] test 31: completed (32.37 sec)

verbs-linux-x86_64-iccstatic on 64 cores of Stampede: test 3: initiated [immediatering (gengbin)] test 3: completed (0.16 sec) test 31: initiated [multi immediatering (gengbin)] test 31: completed (0.18 sec)

At least verbs is OK, but clearly some kind of resource contention blocking progress on ibverbs.

PhilMiller commented 5 years ago

Original date: 2016-01-01 17:15:25

Is this necessarily something we should plan to fix? Is there currently a good reason to run with net-ibverbs instead of verbs? We are trying to deprecate the non-LRTS implementations, but haven't set a firm target for when.

ericjbohm commented 5 years ago

Original date: 2016-01-12 17:26:29

With verbs already highlighted as the go to target, effort spent optimizing net..ibverbs would need a real use case justification.

rbuch commented 5 years ago

Original date: 2016-03-08 20:20:36

I'm closing this since net-ibverbs is essentially deprecated.