On Wed, Nov 01, 2023 at 05:40:30PM +0800, Heng Qi wrote:
>
>
> 在 2023/10/25 下午1:49, Michael S. Tsirkin 写道:
> > On Thu, Oct 12, 2023 at 03:44:04PM +0800, Heng Qi wrote:
> > > Now, virtio-net already supports per-queue moderation parameter
> > > setting. Based on this, we use the netdim library of linux to support
> > > dynamic coalescing moderation for virtio-net.
> > >
> > > Due to hardware scheduling issues, we only tested rx dim.
> > So patches 1 to 4 look ok but patch 5 is untested - we should
> > probably wait until it's tested properly.
>
> Hi, Michael.
>
> For a few reasons (reply to Jason's thread), I won't be trying to push tx
> dim any more in the short term.
>
> Please review the remaining patches.
>
> Thanks a lot!
You got a bunch of comments from Jason - want to address them
in a new version then, and I'll review that?
> >
> >
> > > @Test env
> > > rxq0 has affinity to cpu0.
> > >
> > > @Test cmd
> > > client: taskset -c 0 sockperf tp -i ${IP} -t 30 --tcp -m ${msg_size}
> > > server: taskset -c 0 sockperf sr --tcp
> > >
> > > @Test res
> > > The second column is the ratio of the result returned by client
> > > when rx dim is enabled to the result returned by client when
> > > rx dim is disabled.
> > > --------------------------------------
> > > | msg_size | rx_dim=on / rx_dim=off |
> > > --------------------------------------
> > > | 14B | + 3% |
> > > --------------------------------------
> > > | 100B | + 16% |
> > > --------------------------------------
> > > | 500B | + 25% |
> > > --------------------------------------
> > > | 1400B | + 28% |
> > > --------------------------------------
> > > | 2048B | + 22% |
> > > --------------------------------------
> > > | 4096B | + 5% |
> > > --------------------------------------
> > >
> > > ---
> > > This patch set was part of the previous netdim patch set[1].
> > > [1] was split into a merged bugfix set[2] and the current set.
> > > The previous relevant commentators have been Cced.
> > >
> > > [1] https://lore.kernel.org/all/20230811065512.22190-1-hengqi@xxxxxxxxxxxxxxxxx/
> > > [2] https://lore.kernel.org/all/cover.1696745452.git.hengqi@xxxxxxxxxxxxxxxxx/
> > >
> > > Heng Qi (5):
> > > virtio-net: returns whether napi is complete
> > > virtio-net: separate rx/tx coalescing moderation cmds
> > > virtio-net: extract virtqueue coalescig cmd for reuse
> > > virtio-net: support rx netdim
> > > virtio-net: support tx netdim
> > >
> > > drivers/net/virtio_net.c | 394 ++++++++++++++++++++++++++++++++-------
> > > 1 file changed, 322 insertions(+), 72 deletions(-)
> > >
> > > --
> > > 2.19.1.6.gb485710b
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