From: "Jim C. Brown" <jbrown106@phreaker.net>
To: qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Hyperthreading in the VM host
Date: Fri, 21 Jan 2005 13:27:53 -0500 [thread overview]
Message-ID: <20050121182753.GA12080@jbrown.mylinuxbox.org> (raw)
In-Reply-To: <Pine.LNX.4.44.0501211524240.1185-100000@jdesk.thechesterfields.org>
On Fri, Jan 21, 2005 at 03:52:43PM +0000, Julian Chesterfield wrote:
> My understanding is that Qemu does not support hyperthreading in the host
> OS.
You mean guest OS, right? It shouldn't make a different if the host OS uses it
or not.
> I'm wondering what the arguments are for and against such support. Is it
> in fact architecturally feasible and could there potentially be any performance
> gain?
It would be easier to implement true SMP emulation inside of qemu. Hyperthreading
is just a way to make one CPU look like 2, so it is a way for the PIV to emulate
SMP... there is no point in emulating hyperthreading if we can implement SMP
inside of qemu. Why go to the trouble of getting one emulated cpu to do the
job of 2 when you can just emulate 2 cpus?
>
> Thanks!
> Julian
>
>
>
> _______________________________________________
> Qemu-devel mailing list
> Qemu-devel@nongnu.org
> http://lists.nongnu.org/mailman/listinfo/qemu-devel
>
--
Infinite complexity begets infinite beauty.
Infinite precision begets infinite perfection.
prev parent reply other threads:[~2005-01-21 19:03 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-01-21 15:52 [Qemu-devel] Hyperthreading in the VM host Julian Chesterfield
2005-01-21 17:08 ` [Qemu-devel] " Ben Pfaff
2005-01-21 18:27 ` Jim C. Brown [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=20050121182753.GA12080@jbrown.mylinuxbox.org \
--to=jbrown106@phreaker.net \
--cc=qemu-devel@nongnu.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).