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Date: Thu, 22 Sep 2011 08:41:06 -0400
Message-ID: <CALKntY0pYQwCcCeYaxXFy8Bq9_YSjc_W4pwaTpTf7RE-dkaiag@mail.gmail.com>
From: Xin Tong <xerox.time.tech@gmail.com>
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Subject: Re: [Qemu-devel] TB chaining
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To: =?UTF-8?B?6Zmz6Z+L5Lu7?= <chenwj@iis.sinica.edu.tw>
Cc: Lei Li <lilei@linux.vnet.ibm.com>, qemu-devel <qemu-devel@nongnu.org>

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if direct chaining is used, am I right to think that jmp_next and jmp_first
will not be used ?

Thanks

Xin


On Wed, Sep 21, 2011 at 10:36 PM, =B3=AF=AD=B3=A5=F4 <chenwj@iis.sinica.edu=
.tw> wrote:

> > Well, the comment is from source code. I don't catch why you think "lis=
t
> > of TBS jumping to this one" is wrong.
> > My understand is that TB chain be used forreduce  switch  from the
>  translation
> > cache  to the  guest code. It will be a circular list if there is no
> interrupt
> > or exceptional.
> > At mean while, it's just the date related to TB chain in TB struct, it'=
s
> > not about process of how TB chain work.
>
>   "list of TBs jumping to this one" make me think that jmp_next and
> jmp_first store those TBs jump to this TB. But it seems the actual
> use of jmp_next is another way around, jmp_next points to those TBs
> next to this one.
>
> Regards,
> chenwj
>
> --
> Wei-Ren Chen (=B3=AF=AD=B3=A5=F4)
> Computer Systems Lab, Institute of Information Science,
> Academia Sinica, Taiwan (R.O.C.)
> Tel:886-2-2788-3799 #1667
>
>

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if direct chaining is used, am I right to think that jmp_next and jmp_first=
 will not be used ?<br><br>Thanks <br><br>Xin <br><br><br><div class=3D"gma=
il_quote">On Wed, Sep 21, 2011 at 10:36 PM, =B3=AF=AD=B3=A5=F4 <span dir=3D=
"ltr">&lt;<a href=3D"mailto:chenwj@iis.sinica.edu.tw">chenwj@iis.sinica.edu=
.tw</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"margin: 0pt 0pt 0pt 0.8ex; borde=
r-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class=3D"im"=
>&gt; Well, the comment is from source code. I don&#39;t catch why you thin=
k &quot;list<br>

&gt; of TBS jumping to this one&quot; is wrong.<br>
&gt; My understand is that TB chain be used forreduce &nbsp;switch &nbsp;fr=
om the &nbsp;translation<br>
&gt; cache &nbsp;to the &nbsp;guest code. It will be a circular list if the=
re is no interrupt<br>
&gt; or exceptional.<br>
&gt; At mean while, it&#39;s just the date related to TB chain in TB struct=
, it&#39;s<br>
&gt; not about process of how TB chain work.<br>
<br>
</div> &nbsp;&quot;list of TBs jumping to this one&quot; make me think that=
 jmp_next and<br>
jmp_first store those TBs jump to this TB. But it seems the actual<br>
use of jmp_next is another way around, jmp_next points to those TBs<br>
next to this one.<br>
<div><div></div><div class=3D"h5"><br>
Regards,<br>
chenwj<br>
<br>
--<br>
Wei-Ren Chen (=B3=AF=AD=B3=A5=F4)<br>
Computer Systems Lab, Institute of Information Science,<br>
Academia Sinica, Taiwan (R.O.C.)<br>
Tel:886-2-2788-3799 #1667<br>
<br>
</div></div></blockquote></div><br>

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