[Linuxarm] Re: [PATCH net-next v2 0/3] Some optimization for lockless qdisc

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

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