From: "Alex Bennée" <alex.bennee@linaro.org>
To: Peter Maydell <peter.maydell@linaro.org>
Cc: Xin Tong <trent.tong@gmail.com>, QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] save compiled qemu traces.
Date: Tue, 10 Dec 2013 10:04:14 +0000 [thread overview]
Message-ID: <87y53t58f5.fsf@linaro.org> (raw)
In-Reply-To: <CAFEAcA9h8H8OJEhd=FQLr2g2xXg7j=7NhrQSJ9dNU2g9TchXkg@mail.gmail.com>
peter.maydell@linaro.org writes:
> On 9 December 2013 06:36, Xin Tong <trent.tong@gmail.com> wrote:
>> Is it possible for QEMU to obviate some of the translations by attaching a
>> signature (e.g. a hash) with every translated basic block and try to reuse
>> translated basic block based on the signature as much as possible ? Reuses
>> can be a result of rerunning programs or same libraries statically linked to
>> programs.
>
> We already cache translated results. See tb_find_fast()
> and tb_find_slow() which do the lookup into the cache.
These are for the current execution context though aren't they? I
thought Xin was talking about caching translations between invocations
of QEMU.
I suspect address space randomisation would be another wrinkle in the
side of any such scheme though.
>
> thanks
> -- PMM
--
Alex Bennée
QEMU/KVM Hacker for Linaro
prev parent reply other threads:[~2013-12-10 10:04 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-09 6:36 [Qemu-devel] save compiled qemu traces Xin Tong
2013-12-09 15:25 ` Alex Bennée
2013-12-12 4:07 ` Xin Tong
2013-12-12 4:51 ` Xin Tong
2013-12-12 13:37 ` Laurent Desnogues
2013-12-09 15:32 ` Peter Maydell
2013-12-10 2:41 ` Xin Tong
2013-12-10 10:04 ` Alex Bennée [this message]
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