From: Avi Kivity <avi@redhat.com>
To: Michael Tokarev <mjt@tls.msk.ru>
Cc: Gerd Hoffmann <kraxel@redhat.com>, Stefan <kvm@pms.ifi.lmu.de>,
kvm@vger.kernel.org
Subject: Re: 64 bit guest much faster ?
Date: Mon, 26 Oct 2009 12:44:30 +0200 [thread overview]
Message-ID: <4AE57D8E.7090506@redhat.com> (raw)
In-Reply-To: <4AE57D04.10408@msgid.tls.msk.ru>
On 10/26/2009 12:42 PM, Michael Tokarev wrote:
>> Oh yes, without ept/npt the slowdown should indeed be significant
>> with this much memory.
>
>
> How it is with 4Gb guest/mem without PAE (I mean, with
> CONFIG_HIGHMEM_4G=y)?
> Or even 2Gb? In case of npt or without.
>
It'll be slow. Just use x86_64 with > 1GB.
> Can we construct a sort of a table of expected slowdowns (not in numbers
> but just in terms "significant", "minor" etc) of running <4Gb or >4Gb
> (and <1Gb and >1Gb if that makes significant diffencece) 32bit guests
> with and without npt and 64bit guests, please? I guess it's quite
> interesting to many users.
These tables will be useless, it greatly depends on workload.
--
error compiling committee.c: too many arguments to function
prev parent reply other threads:[~2009-10-26 10:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-23 15:54 64 bit guest much faster ? Stefan
2009-10-25 5:41 ` Avi Kivity
2009-10-26 8:58 ` Gerd Hoffmann
2009-10-26 10:12 ` Avi Kivity
2009-10-26 10:42 ` Michael Tokarev
2009-10-26 10:44 ` Avi Kivity [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4AE57D8E.7090506@redhat.com \
--to=avi@redhat.com \
--cc=kraxel@redhat.com \
--cc=kvm@pms.ifi.lmu.de \
--cc=kvm@vger.kernel.org \
--cc=mjt@tls.msk.ru \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.