Hello Let me ask it in a different way: I want to understand the reasons for the differences in performance between OVS-DPDK and standard OVS. My setup is: ovs/ovs-dpdk is running @ host communicating with a VM
OVS-DPDK 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. guest OS copies the packet to userspace application on VM . Standard OVS 1. packet is received via physical port to the device. 2.packet is processed by the OVS and transferred to a virtio device connected to the VM - whar are the additional overhead here ? QEMU processing - translation , VM exit ?? other ? 3. guest OS copies the packet to userspace application on VM . Question: what are the additional overhead in the standard OVS that cause to poor performance related to the OVS-DPDK setup ? I'm not talking about the PMD improvements (OVS-DPDK) running on the host - but on overhead in the VM context in the standard OVS setup Best Regards avi _______________________________________________ discuss mailing list disc...@openvswitch.org https://mail.openvswitch.org/mailman/listinfo/ovs-discuss
