I am using our own software which uses send receive in both cases. As
I said the code paths are exactly the same except for posting of
receive descriptors as well as initialization.
- Galen
On Jul 26, 2005, at 8:49 AM, Or Gerlitz wrote:
We have software which uses the mellanox shared receive queue and we
are seeing a substantial performance penalty (on the order of 4-5
usec on 0 byte messages).
Are you comparing code that sends short messages either by rdma write
where the
reciever does polling on memory (as done in some IB MPIs "short
message
protocols")
to code that uses send/recv with SRQ --or-- code that does send/recv
where in one run
the recv is to "non shared" queue (that is regular QP) and in the
other
run to SRQ (QP attached to SRQ)?
Or.
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