From owner-freebsd-current  Sat Oct 31 11:49:18 1998
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Received: (from majordom@localhost)
          by hub.freebsd.org (8.8.8/8.8.8) id LAA07009
          for freebsd-current-outgoing; Sat, 31 Oct 1998 11:49:18 -0800 (PST)
          (envelope-from owner-freebsd-current@FreeBSD.ORG)
Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.40.131])
          by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id LAA07003
          for <current@FreeBSD.ORG>; Sat, 31 Oct 1998 11:49:16 -0800 (PST)
          (envelope-from phk@critter.freebsd.dk)
Received: from critter.freebsd.dk (localhost [127.0.0.1])
	by critter.freebsd.dk (8.9.1/8.8.5) with ESMTP id UAA14688;
	Sat, 31 Oct 1998 20:47:26 +0100 (CET)
To: Mike Smith <mike@smith.net.au>
cc: Wolfram Schneider <wosch@panke.de.freebsd.org>, current@FreeBSD.ORG
Subject: Re: calcru: negative time of -695317300 usec for pid 
In-reply-to: Your message of "Sat, 31 Oct 1998 11:30:59 PST."
             <199810311930.LAA00799@dingo.cdrom.com> 
Date: Sat, 31 Oct 1998 20:47:26 +0100
Message-ID: <14686.909863246@critter.freebsd.dk>
From: Poul-Henning Kamp <phk@critter.freebsd.dk>
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG


Could you try to change these lines from the bottom of mi_switch()

	...
        if (switchtime.tv_sec)
                p->p_switchtime = switchtime;
        else
                microuptime(&p->p_switchtime);
	...

to simply:

	microuptime(&p->p_switchtime);

Poul-Henning

In message <199810311930.LAA00799@dingo.cdrom.com>, Mike Smith writes:
>
>I got these yesterday:
>
>/kernel.tc: microtime: 909767572.611009 > 909767572.-694775046
>/kernel.tc: getmicrotime: 909800392.486279 > 909800392.476272
>/kernel.tc: mi_switch: switching history 35692.614679 > 35692.-694771102
>/kernel.tc: mi_switch: switching history 35694.694002225 > 35692.617390
>/kernel.tc: calcru: negative time of -1390738769 usec for pid 271 (xconsole)
>/kernel.tc: pid 262 (XF86_SVGA), uid 0: exited on signal 6 (core dumped)
>/kernel.tc: calcru: negative time of -336242384 usec for pid 262 (XF86_SVGA)
>
>also with NTIMECOUNTER set to 10 (and the code that uses it is in the 
>kernel).
>
>> On 1998-10-28 12:19:30 +0100, Poul-Henning Kamp wrote:
>> > Please try to increase "NTIMECOUNTER" in /sys/kern/kern_clock.c to
>> > 10 and tell me if it works.
>> 
>> The 18th `make world' got a
>> calcru: negative time of -695373488 usec for pid 23724 (as)
>> 
>> and a little bit later died with
>> pid 4542 (ld), uid 0: exited on signal 11 (core dumped)
>> 
>> Wolfram
>> 
>> To Unsubscribe: send mail to majordomo@FreeBSD.org
>> with "unsubscribe freebsd-current" in the body of the message
>> 
>
>-- 
>\\  Sometimes you're ahead,       \\  Mike Smith
>\\  sometimes you're behind.      \\  mike@smith.net.au
>\\  The race is long, and in the  \\  msmith@freebsd.org
>\\  end it's only with yourself.  \\  msmith@cdrom.com
>
>
>

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
"ttyv0" -- What UNIX calls a $20K state-of-the-art, 3D, hi-res color terminal

To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message