From: Thomas Hood <jdthood@mail.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org, Stephen Rothwell <sfr@canb.auug.org.au>
Subject: Re: 2.4.18-pre7 slow ... apm problem
Date: Mon, 28 Jan 2002 11:19:58 -0500 [thread overview]
Message-ID: <1012234798.744.103.camel@thanatos> (raw)
In-Reply-To: <E16VBgH-0000Z4-00@the-village.bc.nu>
In-Reply-To: <E16VBgH-0000Z4-00@the-village.bc.nu>
On Mon, 2002-01-28 at 08:18, Alan Cox wrote:
> We don't know how VMware switches between virtual machines. If that
> switch is done behind Linux back, then VMware is effectively special.
> It is virtualising the system and it has to virtualise APM status too.
> If its doing the switch when it is a current foreground process then
> it wouldnt explain the problem
VMware is essentially a hardware emulator, so if the guest OS is
idling the CPU it should only be idling the virtual CPU, not the
real one.
Having said that, VMware emulates a lot of hardware by making
use of facilities that Linux provides. It emulates a super-VGA
card by making use of X, for example. Do you suppose that
VMware emulates CPU slowing by slowing the real CPU? I hope not.
Since VMware is closed source software we needn't worry our
heads too much about this problem. VMware users have a
workaround: set idle_threshold to 100.
Can we get more info about the keyboard repeat rate slowing?
--
Thomas
next prev parent reply other threads:[~2002-01-28 16:46 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-01-28 0:15 2.4.18-pre7 slow ... apm problem Thomas Hood
2002-01-28 0:32 ` Alan Cox
2002-01-28 2:37 ` Thomas Hood
2002-01-28 10:14 ` Alan Cox
2002-01-28 11:25 ` Thomas Hood
2002-01-28 13:03 ` Stephan von Krawczynski
2002-01-28 13:18 ` Alan Cox
2002-01-28 16:19 ` Thomas Hood [this message]
2002-01-28 3:22 ` Thomas Hood
2002-01-28 20:11 ` Jeff Chua
2002-01-28 20:28 ` Thomas Hood
2002-01-28 22:20 ` Alan Cox
2002-01-29 12:36 ` Jeff Chua
2002-01-30 1:12 ` Thomas Hood
2002-01-30 9:22 ` Jeff Chua
2002-01-28 21:14 ` Thomas Hood
2002-01-28 21:17 ` Jeff Chua
2002-01-28 23:09 ` Stephan von Krawczynski
2002-01-29 13:01 ` Jeff Chua
-- strict thread matches above, loose matches on Subject: below --
2002-01-29 18:53 Petr Vandrovec
2002-01-29 22:47 ` Stephan von Krawczynski
2002-01-30 0:44 ` Jeff Chua
2002-01-30 5:50 ` Stephen Rothwell
2002-01-30 9:27 ` Jeff Chua
2002-02-01 13:20 ` Jeff Chua
2002-01-28 23:22 Petr Vandrovec
2002-01-27 10:08 Jeff Chua
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