[libfabric-users] Verbs send message slow down

Ilango, Arun arun.ilango at intel.com
Tue Mar 21 11:07:24 PDT 2017

This might need some debugging. In the verbs provider, we call ibv_poll_cq with num_entries set to 1 and repeatedly call it when the app has requested multiple completions. I'm not sure if this is the issue but let me check.


-----Original Message-----
From: Libfabric-users [mailto:libfabric-users-bounces at lists.openfabrics.org] On Behalf Of Hefty, Sean
Sent: Tuesday, March 21, 2017 10:53 AM
To: Supun Kamburugamuve <skamburugamuve at gmail.com>
Cc: libfabric-users at lists.openfabrics.org
Subject: Re: [libfabric-users] Verbs send message slow down

> I found a workaround to the problem. Previously I was doing cq_read 
> for multiple completions. If I do cq_read for a single completion the 
> problem goes away. Is this the expected behavior or something wrong 
> with my program or a bug in libfabric?

This is not expected behavior.  Something else is going goofy here.
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