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Date: Mon, 9 Dec 2013 15:36:08 +0900
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From: Xin Tong <trent.tong@gmail.com>
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Subject: [Qemu-devel] save compiled qemu traces.
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Does anyone have profiles on how much time QEMU spends in translating
instructions. QEMU does not have a baseline interpreter nor does it
translate on trace-granularity.  so i imagine QEMU must spend quite a bit
of time translating instructions.

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.

This could end up saving some translation time.

Thank you,
Xin

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:courier =
new,monospace">Does anyone have profiles on how much time QEMU spends in tr=
anslating instructions. QEMU does not have a baseline interpreter nor does =
it translate on trace-granularity. =A0so i imagine QEMU must spend quite a =
bit of time translating instructions.</div>
<div class=3D"gmail_default" style=3D"font-family:courier new,monospace"><b=
r></div><div class=3D"gmail_default" style=3D"font-family:courier new,monos=
pace">Is it possible for QEMU to obviate some of the translations by attach=
ing 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 ? R=
euses can be a result of rerunning programs or same libraries statically li=
nked to programs.=A0</div>
<div class=3D"gmail_default" style=3D"font-family:courier new,monospace"><b=
r></div><div class=3D"gmail_default" style=3D"font-family:courier new,monos=
pace">This could end up saving some translation time.</div><div class=3D"gm=
ail_default" style=3D"font-family:courier new,monospace">
<br></div><div class=3D"gmail_default" style=3D"font-family:courier new,mon=
ospace">Thank you,</div><div class=3D"gmail_default" style=3D"font-family:c=
ourier new,monospace">Xin</div></div>

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