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Date: Fri, 23 May 2014 15:29:34 -0500
From: Eric van Gyzen <eric@vangyzen.net>
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To: John Baldwin <jhb@freebsd.org>, "current@freebsd.org" <current@freebsd.org>
Subject: Re: Change top's notion of idle processes / threads
References: <201405231605.26312.jhb@freebsd.org>
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On 05/23/2014 15:05, John Baldwin wrote:
> Right now, when top is set to not display idle processes or threads, it only 
> displays processes or threads that are currently in a runnable state or have a 
> non-zero %cpu.  However, our %cpu is quite imprecise.  I have patch to change 
> top to instead compare the thread or processes runtime (ki_runtime in 
> kinfo_proc) against the runtime of the thread or process the last time data 
> was fetched.  In essence, top will consider any thread that has run on a CPU 
> since the last update as non-idle.  The end result is that mostly-idle threads 
> and processes will now be visible in top's idle display.  Personally, I find 
> this more useful (and find the current implementation completely useless).  
> The patch is at http://people.freebsd.org/~jhb/patches/top_idle.patch
>
> Comments?

I think I would much prefer the behavior with your patch.

Eric