Re: [net] 4890b686f4: netperf.Throughput_Mbps -69.4% regression

Shakeel Butt
2022-06-24T14:49:28Z

On Fri, Jun 24, 2022 at 03:06:56PM +0800, Feng Tang wrote:
> On Thu, Jun 23, 2022 at 11:34:15PM -0700, Shakeel Butt wrote:
[...]
> >
> > Feng, can you please explain the memcg setup on these test machines
> > and if the tests are run in root or non-root memcg?
>
> I don't know the exact setup, Philip/Oliver from 0Day can correct me.
>
> I logged into a test box which runs netperf test, and it seems to be
> cgoup v1 and non-root memcg. The netperf tasks all sit in dir:
> '/sys/fs/cgroup/memory/system.slice/lkp-bootstrap.service'
>

Thanks Feng. Can you check the value of memory.kmem.tcp.max_usage_in_bytes
in /sys/fs/cgroup/memory/system.slice/lkp-bootstrap.service after making
sure that the netperf test has already run?

If this is non-zero then network memory accounting is enabled and the
slowdown is expected.

> And the rootfs is a debian based rootfs
>
> Thanks,
> Feng
>
>
> > thanks,
> > Shakeel