Messages in this thread | | | From | Jike Song <> | Date | Thu, 20 Aug 2020 15:43:17 +0800 | Subject | Re: Packet gets stuck in NOLOCK pfifo_fast qdisc |
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Hi Josh,
On Fri, Jul 3, 2020 at 2:14 AM Josh Hunt <johunt@akamai.com> wrote: {snip} > Initial results with Cong's patch look promising, so far no stalls. We > will let it run over the long weekend and report back on Tuesday. > > Paolo - I have concerns about possible performance regression with the > change as well. If you can gather some data that would be great. If > things look good with our low throughput test over the weekend we can > also try assessing performance next week. >
We met possibly the same problem when testing nvidia/mellanox's GPUDirect RDMA product, we found that changing NET_SCH_DEFAULT to DEFAULT_FQ_CODEL mitigated the problem, having no idea why. Maybe you can also have a try?
Besides, our testing is pretty complex, do you have a quick test to reproduce it?
-- Thanks, Jike
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