Re: [PATCH v7 00/13] fold per-CPU vmstats remotely

Michal Hocko
2023-04-20T07:56:14Z

On Wed 19-04-23 08:44:23, Andrew Theurer wrote:
> > On Apr 19, 2023, at 6:15 AM, Marcelo Tosatti <mtosatti@redhat.com> wrote:
> >> Andrew Theurer, can you please explain what problem is the vmstat_work
> >> interruption causing in your testing?
> >
> > +CC Andrew.
>
> Nearly every telco we work with for 5G RAN is demanding <20 usec CPU
> latency as measured by cyclictest & oslat. We cannot achieve under 20
> usec with the vmstats interruption.

Are you able to get those latency requirements with PREEMPT_RT?
--
Michal Hocko
SUSE Labs