From: Ulrich Drepper <drepper-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: eranian-sDzT885Ts8HQT0dZR+AlfA@public.gmane.org
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: CPUID emulation
Date: Thu, 31 May 2007 11:30:55 -0700 [thread overview]
Message-ID: <465F145F.5040003@redhat.com> (raw)
In-Reply-To: <20070531115841.GG22798-HU54gidqsKnWxDs0y9d3MAC/G2K4zDHf@public.gmane.org>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Stephane Eranian wrote:
> They use cpuid. I expect more and more applications/OS will rely on
> performance counters to boost performance at runtime.
That's a definitive fact. ld.so for the longest time selects special
DSOs to load automatically based on the data. String functions are
optimized to take cache sizes into account. That info comes from cpuid
as well (at least on Intel CPUs). It's crucial to get info based on the
current CPU.
- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.7 (GNU/Linux)
iD8DBQFGXxRf2ijCOnn/RHQRAq+aAKC/NZ5JSSEGcdt+vqnhZC40V7iJ8gCgjqjR
+9Zh/jNBfg2DVb/2zh6fgUI=
=8HZ1
-----END PGP SIGNATURE-----
-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/
_______________________________________________
kvm-devel mailing list
kvm-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/kvm-devel
next prev parent reply other threads:[~2007-05-31 18:30 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-31 8:20 CPUID emulation Stephane Eranian
[not found] ` <20070531082006.GB22798-HU54gidqsKnWxDs0y9d3MAC/G2K4zDHf@public.gmane.org>
2007-05-31 8:39 ` Avi Kivity
[not found] ` <465E89A8.9020201-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-05-31 11:29 ` Stephane Eranian
[not found] ` <20070531112906.GC22798-HU54gidqsKnWxDs0y9d3MAC/G2K4zDHf@public.gmane.org>
2007-05-31 11:35 ` Avi Kivity
[not found] ` <465EB310.7080402-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-05-31 11:44 ` Stephane Eranian
[not found] ` <20070531114447.GF22798-HU54gidqsKnWxDs0y9d3MAC/G2K4zDHf@public.gmane.org>
2007-05-31 11:52 ` Avi Kivity
[not found] ` <465EB6E5.7000000-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-05-31 11:58 ` Stephane Eranian
[not found] ` <20070531115841.GG22798-HU54gidqsKnWxDs0y9d3MAC/G2K4zDHf@public.gmane.org>
2007-05-31 15:12 ` Troy Benjegerdes
[not found] ` <20070531151244.GC6474-na1kE3HDu0idQnJuSAr7PQ@public.gmane.org>
2007-05-31 15:38 ` ron minnich
2007-05-31 18:30 ` Ulrich Drepper [this message]
[not found] ` <465F145F.5040003-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2007-06-01 1:12 ` H. Peter Anvin
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=465F145F.5040003@redhat.com \
--to=drepper-h+wxahxf7alqt0dzr+alfa@public.gmane.org \
--cc=eranian-sDzT885Ts8HQT0dZR+AlfA@public.gmane.org \
--cc=kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.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