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 <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.

Yes I did. Probably something wrong elsewhere.

>>  Maybe it's better to test macvtap.
> Same thing ...

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