Re: [PATCH 0/4] sched: Various reweight_entity() fixes

[Peter Zijlstra]

On Wed, Feb 11, 2026 at 05:21:49PM +0100, Peter Zijlstra wrote:
> On Wed, Feb 11, 2026 at 11:48:33AM +0100, Peter Zijlstra wrote:
> 
> > Now let me go check on that latency thing from Doug (although hopefully
> > that was the same boo-boo).
> 
> Only ~3 hours so far, I'll let it run overnight.
> 
> So on my ADL with P-cores only (unplug the E things):
> 
> $ NR=`grep -c processor /proc/cpuinfo`; for ((i=0; i<$NR; i++)) do yes > /dev/null & done
> $ turbostat --quiet --Summary --show Busy%,Bzy_MHz,IRQ,PkgWatt,PkgTmp,TSC_MHz,Time_Of_Day_Seconds,usec --interval 1 --out /dev/shm/turbo.log
> 
> $ gawk '/^usec/ {next} { if (T) { d=$2-T; bucket[int(d*1000)]++; } T=$2 } END { for (i in bucket) { printf "%0.3f: %d\n", i/1000, bucket[i] }}' < /dev/shm/turbo.log
> 1.000: 4943
> 1.001: 5000
> 1.002: 21
> 1.003: 10
> 1.004: 1
> 1.005: 1
> 

At 18+ hours:

1.000: 32458
1.001: 32973
1.002: 121
1.003: 63
1.004: 6
1.005: 2

I think we can consider this good :-) *phew*