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Re: Linux kernel question, pre 2.6.23 vs later kernel versions


From: Ole Tange
Subject: Re: Linux kernel question, pre 2.6.23 vs later kernel versions
Date: Sun, 21 Oct 2018 20:52:31 +0200

On Wed, Oct 17, 2018 at 10:25 PM Groom, George <address@hidden> wrote:

> I understand that kernel process scheduling changed at 2.6.23… run queue 
> based to Completely Fair Scheduling (CFS).  Has anyone experienced longer 
> parallel script execute times on systems with later versions of the Linux 
> kernel?
>
> I’ve noticed longer execute times where I’m generating several thousands of 
> processes on later kernel machines.  CFS seems to throttle my processes 
> within a few seconds and then control execution until script completion.  Are 
> there known workarounds for this behavior?  Depending on application needs 
> the older method might be preferable?

I cannot reproduce this. Make an MCVE.

/Ole



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