Re: [tip:sched/hrtick] [hrtimer] 2889243848: stress-ng.timermix.ops_per_sec 30.1% regression

[Peter Zijlstra]

On Tue, Mar 10, 2026 at 07:16:51PM +0100, Peter Zijlstra wrote:
> On Tue, Mar 10, 2026 at 01:11:09PM -0400, Joe Talbott wrote:
> 
> > It looks like it can be found here:
> > https://download.01.org/0day-ci/archive/20260310/202603102229.74b9dee4-lkp@xxxxxxxxx/repro-script
> > 
> > stress-ng --timeout 60 --times --verify --metrics --no-rand-seed --timermix 64
> 
> Thanks, that does indeed work and show the regression.
> 
> Lets see if I can spot the fail...

It looks like that benchmark manages to trip significant nr_hangs, and
yes, I made those more expensive because those were not expected to
actually happen at any sane rate.

Lets see if we can cure that without making a giant mess of things.