lkml.org 
[lkml]   [2021]   [Mar]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [Linuxarm] [PATCH net] net: sched: fix packet stuck problem for lockless qdisc
On Fri, Mar 19, 2021 at 2:25 AM Yunsheng Lin <linyunsheng@huawei.com> wrote:
> I had done some performance test to see if there is value to
> fix the packet stuck problem and support lockless qdisc bypass,
> here is some result using pktgen in 'queue_xmit' mode on a dummy
> device as Paolo Abeni had done in [1], and using pfifo_fast qdisc:
>
> threads vanilla locked-qdisc vanilla+this_patch
> 1 2.6Mpps 2.9Mpps 2.5Mpps
> 2 3.9Mpps 4.8Mpps 3.6Mpps
> 4 5.6Mpps 3.0Mpps 4.7Mpps
> 8 2.7Mpps 1.6Mpps 2.8Mpps
> 16 2.2Mpps 1.3Mpps 2.3Mpps
>
> locked-qdisc: test by removing the "TCQ_F_NOLOCK | TCQ_F_CPUSTATS".

I read this as this patch introduces somehow a performance
regression for -net, as the lockless bypass patch you submitted is
for -net-next.

Thanks.

\
 
 \ /
  Last update: 2021-03-19 20:46    [W:0.221 / U:0.156 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site