On 2021/6/8 20:53, Vladimir Oltean wrote:

On Thu, Jun 03, 2021 at 11:35:48AM -0700, Jakub Kicinski wrote:

quoted

On Thu, 3 Jun 2021 09:47:57 +0800 Yunsheng Lin wrote:

quoted

Patch 1: remove unnecessary seqcount operation.
Patch 2: implement TCQ_F_CAN_BYPASS.
Patch 3: remove qdisc->empty.

Performance data for pktgen in queue_xmit mode + dummy netdev
with pfifo_fast:

 threads    unpatched           patched             delta
    1       2.60Mpps            3.21Mpps             +23%
    2       3.84Mpps            5.56Mpps             +44%
    4       5.52Mpps            5.58Mpps             +1%
    8       2.77Mpps            2.76Mpps             -0.3%
   16       2.24Mpps            2.23Mpps             +0.4%

Performance for IP forward testing: 1.05Mpps increases to
1.16Mpps, about 10% improvement.

Acked-by: Jakub Kicinski <kuba@kernel.org>

Any idea why these patches are deferred in patchwork?
https://patchwork.kernel.org/project/netdevbpf/cover/1622684880-39895-1-git-send-email-linyunsheng@huawei.com/

I suppose it is a controversial change, which need more time
hanging to be reviewed and tested.

By the way, I did not pick up your "Tested-by" from previous
RFC version because there is some change between those version
that deserves a retesting. So it would be good to have a
"Tested-by" from you after confirming no out of order happening
for this version, thanks.