From: Andi Kleen <ak@suse.de>
To: Peter Tattam <peter@jazz-1.trumpet.com.au>
Cc: Andi Kleen <ak@suse.de>,
"Eric W. Biederman" <ebiederm@xmission.com>,
linux-kernel@vger.kernel.org, discuss@x86-64.org
Subject: Re: [discuss] Re: [Bug 350] New: i386 context switch very slow compared to 2.4 due to wrmsr (performance)
Date: Fri, 14 Feb 2003 02:29:31 +0100 [thread overview]
Message-ID: <20030214012931.GA24282@wotan.suse.de> (raw)
In-Reply-To: <Pine.BSF.3.96.1030214103845.369E-100000@jazz-1.trumpet.com.au>
> I have a need to run v86 code from ring 0, so I'm not keen to slip other
...
[for the unsuspecting readers - Peter is talking about non Linux here]
> people's code in there. This would mean I'd need to write a v86 emulator from
> scratch which I think is more time than writing the warping code that I've
> suggested.
Have you taken a look at valgrind? (http://developer.kde.org/~sewardj/)
It is a free software x86 JIT. I don't think it supports 16bit code currently,
but it probably wouldn't be too difficult to add. It wasn't primarily designed
for speed - its main application is to instrument programs - but its slowdown
compared to running on the real CPU is moderate and its certainly fast enough
for anything designed to run on DoS.
-Andi
next prev parent reply other threads:[~2003-02-14 1:19 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-02-12 1:35 Martin J. Bligh
2003-02-12 2:59 ` Dave Jones
2003-02-12 4:21 ` Jamie Lokier
2003-02-12 5:49 ` Linus Torvalds
2003-02-12 10:12 ` Jamie Lokier
2003-03-10 3:07 ` Linus Torvalds
2003-03-10 11:06 ` Andi Kleen
2003-03-10 18:33 ` Linus Torvalds
2003-03-10 22:44 ` Linus Torvalds
2003-02-12 12:54 ` Dave Jones
2003-02-12 7:50 ` Andi Kleen
2003-02-12 10:27 ` Jamie Lokier
2003-02-12 10:45 ` Andi Kleen
2003-02-12 17:52 ` Ingo Oeser
2003-02-12 18:13 ` Dave Jones
2003-02-12 18:18 ` Andi Kleen
2003-02-13 2:42 ` Alan Cox
2003-02-13 5:17 ` Eric W. Biederman
2003-02-13 18:07 ` Andi Kleen
2003-02-14 0:14 ` [discuss] " Peter Tattam
2003-02-14 1:29 ` Andi Kleen [this message]
2003-02-14 1:51 ` Eric Northup
2003-02-14 2:01 ` Peter Tattam
2003-02-14 4:07 ` Thomas J. Merritt
2003-02-14 9:38 ` Peter Finderup Lund
2003-02-14 8:27 ` Eric W. Biederman
2003-03-19 1:22 ` Rob Landley
2003-02-12 4:18 ` Jamie Lokier
2003-02-12 5:54 ` Linus Torvalds
2003-02-12 10:18 ` Jamie Lokier
2003-02-12 17:24 ` Linus Torvalds
2003-03-18 15:24 ` Kevin Pedretti
2003-03-18 16:41 ` Linus Torvalds
2003-03-18 18:30 ` Brian Gerst
2003-03-18 19:14 ` Thomas Molina
2003-03-18 19:21 ` Linus Torvalds
2003-03-18 20:03 ` Thomas Schlichter
2003-03-18 20:24 ` Steven Cole
2003-03-19 0:42 ` H. Peter Anvin
2003-03-19 2:22 ` george anzinger
2003-02-14 14:03 [discuss] " Robert Dewar
2003-02-14 14:25 ` Peter Finderup Lund
2003-02-14 14:25 ` Peter Finderup Lund
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