On Thu, 30 Nov 2023 13:30:40 +0800, Zhu Yanjun <yanjun.zhu@xxxxxxxxx> wrote: > > 在 2023/11/30 10:34, Xuan Zhuo 写道: > > On Wed, 29 Nov 2023 23:29:10 +0800, Zhu Yanjun <yanjun.zhu@xxxxxxxxx> wrote: > >> 在 2023/11/29 23:22, Zhu Yanjun 写道: > >>> 在 2023/11/29 22:59, Michael S. Tsirkin 写道: > >>>> On Wed, Nov 29, 2023 at 10:50:57PM +0800, Zhu Yanjun wrote: > >>>>> 在 2023/5/26 13:46, Liang Chen 写道: > >>>> what made you respond to a patch from May, now? > >>> I want to apply page_pool to our virtio_net. This virtio_net works on > >>> our device. > >>> > >>> I want to verify whether page_pool on virtio_net with our device can > >>> improve the performance or not. > >>> > >>> And I found that ethtool is wrong. > >>> > >>> I use virtio_net on our device. I found that page member variable in > >>> rq is not used in recv path. > >>> > >>> When virtio_net is modprobe, I checked page member variable in rq with > >>> kprobe or crash tool. page member variable in rq is always NULL. > >>> > >>> But sg in recv path is used. > >>> > >>> So how to use page member variable in rq? If page member variable in > >>> rq is always NULL, can we remove it? > >>> > >>> BTW, I use ping and iperf tool to make tests with virtio_net. In the > >>> tests, page member variable in rq is always NULL. > >> > >> And I replaced page member variable in rq with page_pool, but the > >> statistics of page_pool are always 0. > >> > >> It is interesting that page_pool member variable in rq is not used in > >> ping and iperf tests. > >> > >> I am not sure what tests can make page member variable not NULL. ^_^ > > Do you mean rq->pages? > > > > That is for big mode. > > Hi, Xuan > > Got it. What is big mode? Do you mean big packet size? I run iperf with > the packet size 2^23. > > The rq->pages is still NULL. > > It is interesting. You may need to check the code of virtnet_probe(). Thanks. > > Zhu Yanjun > > > > > > Thanks. > > > > > >> Best Regards, > >> > >> Zhu Yanjun > >> > >> > >>> It is interesting. > >>> > >>> Zhu Yanjun > >>>
