Re: [Linux Kernel 5.13 GA] ESXi Performance regression

[Peter Zijlstra]

On Thu, Aug 05, 2021 at 10:58:53AM -0400, Steven Rostedt wrote:
> On Thu, 5 Aug 2021 14:33:52 +0000
> Rahul Gopakumar <gopakumarr@xxxxxxxxxx> wrote:
> 
> > In our testing, we use RHEL 8.1 distro. It looks like tuned daemon updates
> > 15ms (per tuned virtual-guest profile) in /proc/sys/kernel/sched_wakeup_granularity_ns
> > file during tuned's startup.
> > 
> > Now tuned daemon is not able to update the value as the commit moves those
> > files to debugs and thus sched_wakeup_granularity_ns file remains with the
> > default value.
> 
> Hmm, is this a user space breakage?

All those files were under CONFIG_SCHED_DEBUG and a !DEBUG build would
not have them to begin with.