On Nov 10, 2010 05:05 PM, Jonathan Rosser <[email protected]> wrote:
> On 11/10/10 10:30, Andrea Gozzelino wrote: > > Hi Jonathan, > > > > I wrote down a test (latency and transfer speed) with RDMA. > > Server and client work with the same code and they change defined > > size > > buffers for n times (loop). In the makefile.txt, you can find an > > help to > > use the code. > > > > I tested Intel NetEffect NE020 E10G81GP cards with this code and I > > found > > minimum latency about 11 us,maximum transfer speed about 9,6 GBytes, > > CPU > > usage up to 90% on client side. > > The last value is not good for us. > > Hi Andrea, > > Thanks for the code. With the advice from Jason I have changed my test > program to get reliable communication using 1Mbyte buffers. The CPU > usage is less than 2% on both client and server for 10Gb throughput. I > have Chelsio S310CR. > > I find using the poll() approach more natural as I have experience > with > conventional sockets based programming before. > > The rdma_client/rdma_server example programs from librdmacm were the > easiest to start from and I have incrementally changed them from > synchronous to asynchronous operation, and moved the internals of the > high level functions in <rdma/rdma_verbs.h> into my own code piece by > piece. The learning curve is very steep :) > > I found this paper quite interesting > www.systems.ethz.ch/research/awards/minimizingthehidden.pdf > > Cheers, > Jonathan. > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-rdma" > in > the body of a message to [email protected] > More majordomo info at http://vger.kernel.org/majordomo-info.html > Hi Jonathan, I would like testing my Intel NetEffect cards with your code, if it is possible. Could you please send me the files client/server and the compiling commands? Thank you very much for the pdf paper: I'm going to read it during the morning. Cheers, Andrea Gozzelino INFN - Laboratori Nazionali di Legnaro (LNL) Viale dell'Universita' 2 -I-35020 - Legnaro (PD)- ITALIA Office: E-101 Tel: +39 049 8068346 Fax: +39 049 641925 Mail: [email protected] Cell: +39 3488245552 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
