* On Apr,5 Michael S. Tsirkin<[EMAIL PROTECTED]> wrote : > 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?
Nope. Not a priority RDMA Write/Read will do for some time to come. Thanks, Sayantan. > > > > > > >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 -- --------------------------------------------------------- Sayantan Sur Graduate Research Assistant 395 Dreese Labs, Computer Science and Engineering Ohio State University, Office : 774, Dreese Labs Columbus, email : [EMAIL PROTECTED] Ohio - 43210. phone(res) : 614.688.9792 USA. phone(off) : 614.292.8501 --------------------------------------------------------- _______________________________________________ openib-general mailing list [email protected] http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
