Hello Miachel, On Wed, 2009-10-28 at 18:53 +0200, Michael S. Tsirkin wrote: > what exactly do you mean by transmission queue size? > tx_queue_len? > I think what should help with transmission queue full is > actually sndbuf parameter for tap in qemu. I didn't see my email out, I resend the response here. What I meant is the number of descriptors in transmission queue. To be more specific, it is 256->1024 in hw/virtio-net.c file n->tx_vq = virtio_add_queue(&n->vdev, 256, virtio_net_handle_tx); I had a patch to have trans/recv descriptors configurable rather than fixed before. But the test results doens't show any difference for both TCP and UDP, so I didn't submit the patch. I think it's better to make it configurable based on how much memory virtio-net can be used. Thanks Shirley -- 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
