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.
> @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/[email protected]/
> [2] https://lore.kernel.org/all/[email protected]/
>
> 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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