Quoting r. Sayantan Sur <[EMAIL PROTECTED]>:
Subject: Re: [openib-general] performance tests uploaded to contrib
Michael,
Current results:
I currently observe latency below 3.5 usec.
Drop me a note if you find this useful.
Thanks for putting this up on the contrib tree. I have run this rdma_latency, and am getting around 3.35 us (without switch).
Our platform is Dual Xeon EM64T with RH AS 4. Kernel version 2.6.11.7
Do you have any idea when a port of the popular `perf_main' will be available? As more people try to use the Gen2 verbs, `perf_main' (or something similar) can help people evaluate different IB operations and also to have example code to use different features of IB.
Thanks, Sayantan.
I dont plan to port the monolithic perf_main to gen2.
Instead, I plan to upload a set of microbenchmarks each testing a specific feature: rdma latency/rc send latency/rdma bandwidth/rc send bandwidth etc.
I hope that this will help achieve better code clarity than what we have in perf_main.
That is fine. As long as there is some ibverbs level benchmark suite, it will ease the transition.
What are the features you are most interested in?
By RDMA latency/bandwidth, do you mean both RDMA write & read? Will there be any Atomic latency tests also?
By the way, you can already see some example code in libibverbs/examples, although that is not necessarily benchmark-oriented. I used the code in pingpong.c as a starting point for rdma latency test, and it can be used with very little changes as rc send latency test.
Yes, this was helpful for me too. Apart from providing code examples, I was suggesting that a much more comprehensive benchmark suite will help people moving from other vendor stacks to Gen2 to have a quick comparison of performance offered by both stacks.
Thanks, Sayantan.
-- --------------------------------------------------------- Sayantan Sur Graduate Research Assistant
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