Quoting r. Sayantan Sur <[EMAIL PROTECTED]>: > Subject: Re: [openib-general] performance tests uploaded to contrib > > Michael S. Tsirkin wrote: > >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?
RDMA write test is out there, I hope to upload the read test RSN. > Will > there be any Atomic latency tests also? Sure, why not. Is it a priority for you? > > > >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. > I agree. -- MST - Michael S. Tsirkin _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
