Hi, > Subject: [dpdk-dev] Testing memnic for VM to VM transfer > > Hi everyone: > We are interested in testing the performance of the memnic driver > posted at http://dpdk.org/browse/memnic/refs/. > We want to compare its performance compared to other techniques to transfer > packets between the guest and the kernel, > predominately for VM to VM transfers. > > We have downloaded the memnic components and have got it running in a guest > VM. > > The question we hope this group might be able to help with is what would be > the best way to processes the packets in the > kernel to get a VM to VM transfer.
I think there is no kernel code work with MEMNIC. The recommend switching software on the host is Intel DPDK vSwitch hosted on 01.org and github. https://github.com/01org/dpdk-ovs/tree/development Intel DPDK vSwitch runs on userspace not kernel. I introduced this mechanism to DPDK vSwitch and the guest drivers are maintained in dpdk.org. thanks, Hiroshi > > A couple options might be possible > > > 1. Common shared buffer between two VMs. With some utility/code to > switch TX & RX rings between the two VMs. > > VM1 application --- memnic --- common shared memory buffer on the host --- > memnic --- VM2 application > > 2. Special purpose Kernel switching module > > VM1 application --- memnic --- shared memory VM1 --- Kernel switching > module --- shared memory VM2 --- memnic --- > VM2 application > > 3. Existing Kernel switching module > > VM1 application --- memnic --- shared memory VM1 --- existing Kernel > switching module (e.g. OVS/linux Bridge/VETh pair) > --- shared memory VM2 --- memnic --- VM2 application > > Can anyone recommend which approach might be best or easiest? We would like > to avoid writing much (or any) kernel code > so if there are already any open source code or test utilities that provide > one of these options or would be a good starting > point to start from, a pointer would be much appreciated. > > Thanks in advance > > > John Joyce