Messages in this thread | | | Date | Fri, 14 Feb 2003 02:29:31 +0100 | From | Andi Kleen <> | Subject | Re: [discuss] Re: [Bug 350] New: i386 context switch very slow compared to 2.4 due to wrmsr (performance) |
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> 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.
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