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Date:      Thu, 23 Jan 2003 11:56:28 -0800
From:      Brooks Davis <brooks@one-eyed-alien.net>
To:        Lev Serebryakov <lev@serebryakov.spb.ru>
Cc:        current@FreeBSD.ORG
Subject:   Re: 5.0-RELEASE & VMWare 3.2
Message-ID:  <20030123115628.B14383@Odin.AC.HMC.Edu>
In-Reply-To: <975523843.20030123225001@serebryakov.spb.ru>; from lev@serebryakov.spb.ru on Thu, Jan 23, 2003 at 10:50:01PM %2B0300
References:  <975523843.20030123225001@serebryakov.spb.ru>

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On Thu, Jan 23, 2003 at 10:50:01PM +0300, Lev Serebryakov wrote:
> Hello, current! How are you?
>=20
>   When I needed to experiment with 4.6-RELEASE and I didn't have
>   ``free'' computer, I installed 4.6-RELEASE on VMWare. It works
>   pretty well and I was totally satisfied.
>=20
>   My host is: 2xP!!!-770Mhz, 512Mb of memory, Hardware RAID with
>   2x40Gb IBM IDE HDDs (and one simple system disk). Host OS is W'2000 WS.
>=20
>   Now I'm trying to look at 5.0-RELEASE (I've downloaded ISO of first
>   i386 CD).
>=20
>   It doesn't work under VMWare 3.2! Ok, it works, really. But speed is
>   VERY low. I even could not do installation! Unpacking of
>   distributive have been started at normal speed, but after 2 or 3
>   minutes speed decreased to 6Kb/s and after that to 1Kb/s! `top' on
>   emergency console shows, that cpio+gunzip take only 5% of CPU,
>   system takes 25% of CPU and interrupts takes 70% of CPU!
>=20
>   4.6-RELEASE installs on same VMWare virtual computer without any
>   problems and works very fast!
>=20
>   Is it problem of VMWare or 5.0-RELEASE? Is it known problem? I could
>   provide any additional information, if needed.

=46rom sys/i386/conf/NOTES:

# CPU_DISABLE_CMPXCHG disables the CMPXCHG instruction on > i386 IA32=20
# machines.  VmWare seems to emulate this instruction poorly, causing=20
# the guest OS to run very slowly.  Enabling this with a SMP kernel
# will cause the kernel to be unusable.

You need a kernel with this option or compiled with "cpu I386_CPU".

-- Brooks

--=20
Any statement of the form "X is the one, true Y" is FALSE.
PGP fingerprint 655D 519C 26A7 82E7 2529  9BF0 5D8E 8BE9 F238 1AD4

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