| Message ID | 1621502873-62720-1-git-send-email-linyunsheng@huawei.com (mailing list archive) |
|---|---|
| Headers | show |
| Series | Some optimization for lockless qdisc | expand |
On 2021/5/20 17:27, Yunsheng Lin wrote: > Patch 1: remove unnecessary seqcount operation. > Patch 2: implement TCQ_F_CAN_BYPASS. > Patch 3: remove qdisc->empty. > > RFC v4: Use STATE_MISSED and STATE_DRAINING to indicate non-empty > qdisc, and add patch 1 and 3. @Vladimir, Ahmad It would be good to run your testcase to see if there are any out of order for this version, because this version has used STATE_MISSED and STATE_DRAINING to indicate non-empty qdisc, thanks. It is based on newest net branch with qdisc stuck patchset. Some performance data as below: pktgen + dummy netdev: threads without+this_patch with+this_patch delta 1 2.60Mpps 3.18Mpps +22% 2 3.84Mpps 5.72Mpps +48% 4 5.52Mpps 5.52Mpps +0.0% 8 2.77Mpps 2.81Mpps +1.4% 16 2.24Mpps 2.29Mpps +2.2% IP forward testing: 1.05Mpps increases to 1.15Mpps > > Yunsheng Lin (3): > net: sched: avoid unnecessary seqcount operation for lockless qdisc > net: sched: implement TCQ_F_CAN_BYPASS for lockless qdisc > net: sched: remove qdisc->empty for lockless qdisc > > include/net/sch_generic.h | 26 +++++++++++++------------- > net/core/dev.c | 22 ++++++++++++++++++++-- > net/sched/sch_generic.c | 23 ++++++++++++++++------- > 3 files changed, 49 insertions(+), 22 deletions(-) >
Hi Yunsheng, On Thu, May 20, 2021 at 05:45:14PM +0800, Yunsheng Lin wrote: > On 2021/5/20 17:27, Yunsheng Lin wrote: > > Patch 1: remove unnecessary seqcount operation. > > Patch 2: implement TCQ_F_CAN_BYPASS. > > Patch 3: remove qdisc->empty. > > > > RFC v4: Use STATE_MISSED and STATE_DRAINING to indicate non-empty > > qdisc, and add patch 1 and 3. > > @Vladimir, Ahmad > It would be good to run your testcase to see if there are any > out of order for this version, because this version has used > STATE_MISSED and STATE_DRAINING to indicate non-empty qdisc, > thanks. > > It is based on newest net branch with qdisc stuck patchset. > > Some performance data as below: > > pktgen + dummy netdev: > threads without+this_patch with+this_patch delta > 1 2.60Mpps 3.18Mpps +22% > 2 3.84Mpps 5.72Mpps +48% > 4 5.52Mpps 5.52Mpps +0.0% > 8 2.77Mpps 2.81Mpps +1.4% > 16 2.24Mpps 2.29Mpps +2.2% > > IP forward testing: 1.05Mpps increases to 1.15Mpps I will start the regression test with the flexcan driver on LS1028A and let you know tomorrow or so if there is any TX reordering issue.
On Thu, May 20, 2021 at 04:46:52PM +0300, Vladimir Oltean wrote: > Hi Yunsheng, > > On Thu, May 20, 2021 at 05:45:14PM +0800, Yunsheng Lin wrote: > > On 2021/5/20 17:27, Yunsheng Lin wrote: > > > Patch 1: remove unnecessary seqcount operation. > > > Patch 2: implement TCQ_F_CAN_BYPASS. > > > Patch 3: remove qdisc->empty. > > > > > > RFC v4: Use STATE_MISSED and STATE_DRAINING to indicate non-empty > > > qdisc, and add patch 1 and 3. > > > > @Vladimir, Ahmad > > It would be good to run your testcase to see if there are any > > out of order for this version, because this version has used > > STATE_MISSED and STATE_DRAINING to indicate non-empty qdisc, > > thanks. > > > > It is based on newest net branch with qdisc stuck patchset. > > > > Some performance data as below: > > > > pktgen + dummy netdev: > > threads without+this_patch with+this_patch delta > > 1 2.60Mpps 3.18Mpps +22% > > 2 3.84Mpps 5.72Mpps +48% > > 4 5.52Mpps 5.52Mpps +0.0% > > 8 2.77Mpps 2.81Mpps +1.4% > > 16 2.24Mpps 2.29Mpps +2.2% > > > > IP forward testing: 1.05Mpps increases to 1.15Mpps > > I will start the regression test with the flexcan driver on LS1028A and > let you know tomorrow or so if there is any TX reordering issue. 14 million CAN frames later, I did not observe any TX reordering at all.
Patch 1: remove unnecessary seqcount operation. Patch 2: implement TCQ_F_CAN_BYPASS. Patch 3: remove qdisc->empty. RFC v4: Use STATE_MISSED and STATE_DRAINING to indicate non-empty qdisc, and add patch 1 and 3. Yunsheng Lin (3): net: sched: avoid unnecessary seqcount operation for lockless qdisc net: sched: implement TCQ_F_CAN_BYPASS for lockless qdisc net: sched: remove qdisc->empty for lockless qdisc include/net/sch_generic.h | 26 +++++++++++++------------- net/core/dev.c | 22 ++++++++++++++++++++-- net/sched/sch_generic.c | 23 ++++++++++++++++------- 3 files changed, 49 insertions(+), 22 deletions(-)