On Fri, 2008-09-26 at 15:33 -0700, Roland Dreier wrote: > > One more question and I'll get to experimenting. Does this kernel > > module use "RDMA" and provide highest performance available for the > > application? > > No, it is just using the IB adapter as a very fast NIC. >
Thanks so essentially to get RDMA support I'd have to use the RDMA library. > But you can't really use RDMA for multicast anyway. > > - R The RDMA library has features for joining a multicast group. Could you point me at the appropriate specifications about infiniband relating to the limitations of RDMA when used with multicast (or hand me an explanation would be fine too :) Also to answer your questions about performance requirements: today totem is entirely cpu bound when running on GIGE hardware with jumbo frames. A majority of this time I believe is spent copying message data between kernel and userspace, and then the other copies that take place around the protocol. I'd like to remove any copies that are present if possible to give the CPU more bandwidth to execute the protocol. Thanks Roland Regards -steve _______________________________________________ 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
