Date: Sun, 17 Sep 2000 16:27:12 +0200 (CEST) From: Alexander Leidinger <Alexander@Leidinger.net> To: bde@zeta.org.au Cc: current@FreeBSD.ORG, jhb@FreeBSD.ORG Subject: Re: 100% system time? (SMPng on UP system) Message-ID: <200009171427.e8HERFn34982@Magelan.Leidinger.net> In-Reply-To: <Pine.BSF.4.21.0009180034230.11515-100000@besplex.bde.org>
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On 18 Sep, Bruce Evans wrote:
>> >> dnetc runns with idprio 31, system cvsupped around Sep 16, 11 CEST from
>> >> a german mirror (it contains the idle fixes: src/sys/kern/kern_idle.c,v
>> >> 1.4), complete build{world,kernel}.
>> >>
>> >> ---snip---
>> >> last pid: 1666; load averages: 1.10, 1.11, 1.03 up 0+00:51:21 16:54:14
>> >
>> > Perhaps it really is a system process :-[. idprio on a pure cpu hog prevents
>> > other user processes from running like a system process might do:
>> >
>> > idprio 31 sh -c "while :; do :; done"
>> >
>> > System processes actually hang the entire system until they complete:
>>
>> Are you mixing idprio with rtprio or did I not understand what you
>> explain?
>
> You didn't understand :-). Try the example. It only uses idprio.
I have dnetc still running with idprio 31 and it didn't hang the entire
system (I'm able to write this mail and compiling a port in the
background while dnetc is running).
As I understand this:
- The man-page of idprio says it allows processes only to run if the
system is idle.
- You say, in my case (dnetc is a cpu hog, isn't it?) idprio prevents
other processes from running (the opposide of what I want).
- I say, dnetc is running in the background with idprio 31 and I'm able
to do usefull work while it is running.
Confused,
Alexander.
--
Reboot America.
http://www.Leidinger.net Alexander @ Leidinger.net
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