From: 陳韋任 <chenwj@iis.sinica.edu.tw>
To: Stefan Hajnoczi <stefanha@gmail.com>
Cc: "Alexander Graf" <agraf@suse.de>, 陳韋任 <chenwj@iis.sinica.edu.tw>,
qemu-devel@nongnu.org
Subject: Re: [Qemu-devel] Improve QEMU performance with LLVM codegen and other techniques
Date: Thu, 1 Dec 2011 17:30:14 +0800 [thread overview]
Message-ID: <20111201093014.GA27201@cs.nctu.edu.tw> (raw)
In-Reply-To: <20111201074657.GA29861@stefanha-thinkpad.localdomain>
Hi, Stefan
> It would be interesting to use an optimized interpreter instead of TCG,
> then go to LLVM for hot traces. This is more HotSpot-like with the idea
> being that the interpreter runs through initialization and rarely
> executed code without a translation overhead. For the hot paths LLVM
> kicks in and high-quality translated code is executed.
Not sure if it's doable. I can only tell you we rely on QEMU frontend to
disassemble guest binary into TCG IR, then translate TCG IR into LLVM IR.
And talk about the translation overhead, the time QEMU frontend spend is
negligible.
Regards,
chenwj
--
Wei-Ren Chen (陳韋任)
Computer Systems Lab, Institute of Information Science,
Academia Sinica, Taiwan (R.O.C.)
Tel:886-2-2788-3799 #1667
Homepage: http://people.cs.nctu.edu.tw/~chenwj
next prev parent reply other threads:[~2011-12-01 9:30 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-29 7:03 [Qemu-devel] Improve QEMU performance with LLVM codegen and other techniques 陳韋任
2011-11-30 12:37 ` Alexander Graf
2011-12-01 3:50 ` 陳韋任
2011-12-01 7:46 ` Stefan Hajnoczi
2011-12-01 9:16 ` Alex Bradbury
2011-12-01 9:30 ` 陳韋任 [this message]
2011-12-01 10:23 ` Alexander Graf
2011-12-04 6:14 ` 陳韋任
2011-12-04 11:29 ` Alexander Graf
2011-12-05 6:05 ` 陳韋任
2011-12-01 10:59 ` Peter Maydell
2011-12-06 7:39 ` 陳韋任
2011-12-19 17:44 ` Alexander Graf
2011-11-30 12:51 ` Peter Maydell
2011-12-01 9:03 ` 陳韋任
2011-12-01 9:13 ` 陳韋任
2011-12-01 9:15 ` Max Filippov
2011-12-01 9:25 ` 陳韋任
2011-12-01 9:41 ` Max Filippov
2011-12-06 6:37 ` 陳韋任
2011-12-01 10:12 ` Peter Maydell
2011-12-01 10:40 ` 陳韋任
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