Thanks, Jesse. Could you explain more details on what features are not available in the user space datapath?
On Thu, Jun 7, 2012 at 6:05 AM, Jesse Gross <[email protected]> wrote: > On Thu, Jun 7, 2012 at 12:52 PM, Dong Jin <[email protected]> wrote: > > I am running userspace mode of ovs with the following topology > > > > VM1(eth0) ---- (eth0)VM2(eth1) --- (eth0)VM3 > > > > VM1 and VM3 are end hosts, and VM2 runs the userspace ovs daemon to > > emulate a two-port Ethernet switch. > > > > I sent UDP traffic from VM1 to VM3. Everything is received with 100 > > Mb/s rate. However, for 200 Mb/s data rate, packet losses are observed > > (below is the log), and throughput is around 150 Mb/s. If I connect > > VM1 and VM3 directly without using VM2, it is fine to receive 200 Mb/s > > or even high rate with no loss. It looks that ovs causes the packet > > drop and limit the throughput. Just wondering the reason and how to > > overcome this to emulate high data rate? Advices are very appreciated. > > The userspace datapath is primarily intended for testing and maximum > compatibility. It does not have all of the features or performance of > the kernel module. >
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