On Wed, Dec 02, 2015 at 01:04:03PM +0800, Jason Wang wrote: > > > On 12/01/2015 10:43 PM, Michael S. Tsirkin wrote: > > 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 <jasowang@xxxxxxxxxx> > >>> 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. > > Yes I did. Probably something wrong elsewhere. Is this for guest-to-guest? the patch to do napi for tap is still not upstream due to minor performance regression. Want me to repost it? > > > >> Maybe it's better to test macvtap. > > Same thing ... > > -- 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
