Hello, <<conditions>> I'd like to send and receive UDP on Guest of KVM and make a performance which is almost like in a non virtual system. However, the throughput on Guest is just about 1/5 of a non virtual system throughput performance. 10GByte-Ethernet supports SR-lOV and make two Virtual Function. This makes Guest directly access 10GByte-Ethernet with the PCI passthrough(VT-d) function. <<an inquiry>> Please tell me the way to activate cpu-affinity on Guest of KVM. Conditions are as follows- a) assigning different Virtual CPU(VCPU) to both sending-thread and receiving-thread of an UDP sending and receiving application b) assigning Packets receiving IRQ of Virtual Function to the same VCPU as receiving-thread c) assigning Packets sending IRQ of Virtual Function to the same VCPU as sending-thread <<a problem>> Although I'd like to set up "/proc/irq/*/smp_affinity" on the condition that I write on <<an inquiry>>, it cannot be changed. Therefore, IRQ of Virtual Function fixedly allocates to CPU0 and throughput is at a high latency. (ignores "/proc/irq/*/smp_affinity") (KVM version) qemu-kvm : 0.12.1.2-2.113.el6.x86_64 libvirt : 0.8.1-27.el6.x86_64 virt-manager : 0.8.4-8.el6.noarch -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
