On Wed, 2011-02-02 at 06:40 +0200, Michael S. Tsirkin wrote: > ust tweak the parameters with sysfs, you do not have to edit the code: > echo 64 > /sys/module/vhost_net/parameters/tx_bufs_coalesce > > Or in a similar way for tx_packets_coalesce (since we use indirect, > packets will typically use 1 buffer each). We should use packets instead of buffers, in indirect case, one packet has multiple buffers, each packet uses one descriptor from the ring (default size is 256). echo 128 > /sys/module/vhost_net/parameters/tx_packets_coalesce The way I am changing is only when netif queue has stopped, then we start to count num_free descriptors to send the signal to wake netif queue. 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
