From: 陳韋任 <chenwj@iis.sinica.edu.tw>
To: Alexander Graf <agraf@suse.de>
Cc: qemu-devel@nongnu.org, 陳韋任 <chenwj@iis.sinica.edu.tw>
Subject: Re: [Qemu-devel] Improve QEMU performance with LLVM codegen and other techniques
Date: Sun, 4 Dec 2011 14:14:08 +0800 [thread overview]
Message-ID: <20111204061408.GA11393@cs.nctu.edu.tw> (raw)
In-Reply-To: <6A814C06-21FA-47FB-94BF-F3132310E191@suse.de>
> > 3. Then a trace composed of TCG blocks is sent to a LLVM translator. The translator
> > generates the host binary for the trace into a LLVM code cache, and patch the
>
> I don't fully understand this part. Do you disassemble the x86 blob that TCG emitted?
We ask TCG to disassemble the guest binary where the trace beginning with
_again_ to get a set of TCG blocks, then sent them to the LLVM translator.
> > the moment (make the situation simpler), I think we still don't have to check
> > the blocks' hflags and segment descriptors in the trace to see if they match.
>
> Yeah. You only need to be sync'ed with the invalidation then. And make sure you patch the TB atomically, so you don't have a separate thread accidentally run half your code and half the old code.
Sync'ed with the invalidation means tb_flush, cpu_unlink and tb_phys_invalidate?
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:[~2011-12-04 6:14 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
2011-12-01 10:23 ` Alexander Graf
2011-12-04 6:14 ` 陳韋任 [this message]
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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