Date: Mon, 28 Jun 1999 09:00:02 -0700 (PDT) From: John Grzesiak <johng@pcrd.net> To: freebsd-bugs@FreeBSD.org Subject: Re: kern/10411: top, vmstat, iostat show 0% cpu idle & usage on SMP system Message-ID: <199906281600.JAA18833@freefall.freebsd.org>
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The following reply was made to PR kern/10411; it has been noted by GNATS.
From: John Grzesiak <johng@pcrd.net>
To: freebsd-gnats-submit@freebsd.org, bob@pmr.com
Cc:
Subject: Re: kern/10411: top, vmstat, iostat show 0% cpu idle & usage on SMP
system
Date: Mon, 28 Jun 1999 11:52:44 -0400
I have a few more nuggets to add:
On my Asus P2B-DS :
systat -v 1 yields the following:
The alternate system clock has died!
Reverting to ``Pigs'' display
The problem only exists on my P-II based hardware:
ASUS P54E-NP-4 w 2/133 P5's (96MB) works fine.
Micronics W6-LI w 2/200-512 Pro's (128MB) works fine.
ASUS P2B-DS w 2/350 P-II (256MB PC-100) has this problem.
I have been hacking the BETTER_CLOCK and APIC_INTR_REORDER and
APIC_INTR_HIGHPRI_CLOCK
to no positive benefit.
(One combination may have yielded a small improvement, but since I
have no way to prove it...)..
My thinking is that this a problem with a lock being affected by
cacheing. (or along these lines).
I also think that the increased clock drift (kern/9974) is closely
related to this problem.
(and just may be the same problem).
johng@pcrd.net -- John Grzesiak -- 603.548.5706
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