On Tue, Dec 01, 2015 at 01:17:49PM +0800, Jason Wang wrote: > > > On 11/30/2015 06:44 PM, Michael S. Tsirkin wrote: > > On Wed, Nov 25, 2015 at 03:11:29PM +0800, Jason Wang wrote: > >> > This patch tries to poll for new added tx buffer or socket receive > >> > queue for a while at the end of tx/rx processing. The maximum time > >> > spent on polling were specified through a new kind of vring ioctl. > >> > > >> > Signed-off-by: Jason Wang <jasow...@redhat.com> > > One further enhancement would be to actually poll > > the underlying device. This should be reasonably > > straight-forward with macvtap (especially in the > > passthrough mode). > > > > > > Yes, it is. I have some patches to do this by replacing > skb_queue_empty() with sk_busy_loop() but for tap.
We probably don't want to do this unconditionally, though. > Tests does not show > any improvement but some regression. Did you add code to call sk_mark_napi_id on tap then? sk_busy_loop won't do anything useful without. > Maybe it's better to test macvtap. Same thing ... -- MST -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html