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Message-ID: <20250106165932.GG20870@noisy.programming.kicks-ass.net>
Date: Mon, 6 Jan 2025 17:59:32 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Doug Smythies <dsmythies@...us.net>
Cc: linux-kernel@...r.kernel.org, vincent.guittot@...aro.org
Subject: Re: [REGRESSION] Re: [PATCH 00/24] Complete EEVDF
On Mon, Jan 06, 2025 at 07:01:34AM -0800, Doug Smythies wrote:
> > What is the easiest 100% load you're seeing this with?
>
> Lately, and specifically to be able to tell others, I have been using:
>
> yes > /dev/null &
>
> On my Intel i5-10600K, with 6 cores and 2 threads per core, 12 CPUs,
> I run 12 of those work loads.
On my headless ivb-ep 2 sockets, 10 cores each and 2 threads per core, I
do:
for ((i=0; i<40; i++)) ; do yes > /dev/null & done
tools/power/x86/turbostat/turbostat --quiet --Summary --show Busy%,Bzy_MHz,IRQ,PkgWatt,PkgTmp,TSC_MHz --interval 1
But no so far, nada :-( I've tried with full preemption and voluntary,
HZ=1000.
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