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Re: [Qemu-devel] Storing code caching

From: Julian Seward
Subject: Re: [Qemu-devel] Storing code caching
Date: Thu, 8 Jul 2004 20:11:54 +0100
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> The program I would write would basically use the qemu core to process
> an entire executable, creating the blocks that are executable on the
> host machine, and store them. Then start work on modifying qemu to
> recognise the existense of the cache file and use the blocks. Then deal
> with the self-modyfing code issue as above ...

Nice idea, but ... I suspect it solves a non-problem really.  Caching
translations is only worthwhile when translation time is a large
part of overall run time, but I bet that's not the case.  It certainly
isn't with Valgrind, which uses similar technology.

If you want to throw lots of hacking effort at QEMU to make it
go faster, I suspect you'll need to be building a more sophisticated
code generator, a la "lcc" (http://www.cs.princeton.edu/software/lcc).
That's a lot of work, though.


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