linux-kernel - Re: [REGRESSION] Re: [PATCH 00/24] Complete EEVDF

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Message-ID: <20250113110546.GE5388@noisy.programming.kicks-ass.net>
Date: Mon, 13 Jan 2025 12:05:46 +0100
From: Peter Zijlstra <peterz@...radead.org>
To: Doug Smythies <dsmythies@...us.net>
Cc: linux-kernel@...r.kernel.org, vincent.guittot@...aro.org,
	'Ingo Molnar' <mingo@...nel.org>, wuyun.abel@...edance.com
Subject: Re: [REGRESSION] Re: [PATCH 00/24] Complete EEVDF

On Sun, Jan 12, 2025 at 03:14:17PM -0800, Doug Smythies wrote:

> The test I have been running to create some of the graphs I have been
> attaching is a little different, using turbostat with different options:
> 
> turbostat --quiet --Summary --show Busy%,Bzy_MHz,IRQ,PkgWatt,PkgTmp,TSC_MHz,Time_Of_Day_Seconds --interval 1
> 
> And with this test I get intervals over 1 second by over 10 milliseconds.

> First the b12 kernel (the last good one in the kernel bisection):
> 
> Time          Occurrences
> 1.000000, 3282
> 1.001000, 1826
> 1.002000, 227
> 1.003000, 1852
> 1.004000, 1036
> 1.005000, 731
> 1.006000, 75
> 1.007000, 30
> 1.008000, 9
> 1.009000, 2
> 1.010000, 1
> 1.011000, 1

You're creating these Time values from the consecutive
Time_Of_Day_Seconds data using a script? Let me go check the turbostat
code to see if my hackery is still invoked, even if not displayed.