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:

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quoted

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

quoted

thanks,
Shakeel