I wrote a simple test program to actual time it takes for RDMA read over IB. I find a huge difference in the numbers returned by timing. I was wondering if someone could help me in finding what I might be doing wrong in the way I am measuring the time.
Steps I do for timing is as follows. 1) Create the send WR for RDMA Read. 2) call gettimeofday () 3) ibv_post_send () the WR 4) Loop around ibv_poll_cq () till I get the completion event. 5) call gettimeofday (); The difference in time would give me the time it takes to perform RDMA read over IB. I constantly get around 35 microsecs as the timing which seems to be really large considering the latency of IB. I am measuring the time for transferring 4K bytes of data. If anyone wants I can send the code that I have written. I am not subscribed to the list, if you could please cc me in the reply. Thanks, Bharath --- Bharath Ramesh <[EMAIL PROTECTED]> http://people.cs.vt.edu/~bramesh _______________________________________________ general mailing list [email protected] http://lists.openfabrics.org/cgi-bin/mailman/listinfo/general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
