Hi, I'm trying to understand the packet life-cycle in ovs-dpdk (running on host) communicating with a VM through vhost-user interface: 1. packet is received via physical port to the device. 2.DMA transfer to mempools on huge-pages allocated by dpdk-ovs - in user-space. 3. ovs-dpdk copies this packet to the shared-vring of the associated guest (shared between ovs-dpdk userspace process and guest) 4. no more copies in the guest - i.e. when any application running on the guest wants to consume the packet - there is a zero copy between the shared-vring and the guest application.
Is that correct ? how 4 is implemented ? this is a communication between OS in guest and application in guest . so how this is implemented with zero copy ? Best Regards avi
