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RTL8111/8168B PCI Express Gigabit Ethernet controller
>

So I would guess it is PCI Express...


On Mon, Mar 29, 2010 at 12:01 PM, John Kasunich <jmkasunich at fastmail.fm>wrote:

>
>
> On Mon, 29 Mar 2010 10:32 +0200, "Jan Ceuleers"
> <jan.ceuleers at computer.org> wrote:
> > John Kasunich wrote:
> > > Networking works fine when the Hauppauge 2250 PCI Express tuner
> > > card is not in the machine.
> > >
> > > When I installed the tuner card, I started getting 5-15% dropped
> > > packets.
> >
> > Can you check what the PCI latency timers on your devices are set
> > to, and whether increasing the latency timer on your NIC relative
> > to the tuner helps?
> >
>
> Currently, both are zero (my lspci results with and without the tuner
> are
> at http://paste.ubuntu.com/405203/ )
>
> I'll try increasing the NIC latency tonight, but since the tuner is PCI
> express, this wiki page http://www.mythtv.org/wiki/PCI_Latency seems to
> indicate that it won't make a difference.  (See the paragraph about PCIe
> near the bottom of the page.)  I don't know whether the NIC is PCI or
> PCIe, since it is onboard.  Is there anything in the lspci results that
> would tell me?
>
> I wonder if I should be looking at the latency numbers for the PCI
> bridges?  When I install the tuner, I also get another bridge in the
> lspci listing...
>
> John Kasunich
>
>
>
> --
>  John Kasunich
>  jmkasunich at fastmail.fm
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
>



-- 
Rob Shields
Email: rwshields at gmail.com
CWRU Computer Science PhD Student
S.A.G.E. Project Developer (http://darwin.cwru.edu/)

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<blockquote style=3D"margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(=
204, 204, 204); padding-left: 1ex;" class=3D"gmail_quote">I don&#39;t know =
whether the NIC is PCI or<br>
PCIe, since it is onboard. =A0Is there anything in the lspci results that<b=
r>
would tell me?<br></blockquote><br>From your original email - <br><br><bloc=
kquote style=3D"margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, =
204, 204); padding-left: 1ex;" class=3D"gmail_quote">RTL8111/8168B PCI Expr=
ess Gigabit Ethernet controller<br>
</blockquote><br>So I would guess it is PCI Express...<br><br><br><div clas=
s=3D"gmail_quote">On Mon, Mar 29, 2010 at 12:01 PM, John Kasunich <span dir=
=3D"ltr">&lt;<a href=3D"mailto:jmkasunich at fastmail.fm">jmkasunich at fastmail.=
fm</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"=
><br>
<br>
On Mon, 29 Mar 2010 10:32 +0200, &quot;Jan Ceuleers&quot;<br>
&lt;<a href=3D"mailto:jan.ceuleers at computer.org">jan.ceuleers at computer.org<=
/a>&gt; wrote:<br>
&gt; John Kasunich wrote:<br>
&gt; &gt; Networking works fine when the Hauppauge 2250 PCI Express tuner<b=
r>
&gt; &gt; card is not in the machine.<br>
&gt; &gt;<br>
&gt; &gt; When I installed the tuner card, I started getting 5-15% dropped<=
br>
&gt; &gt; packets.<br>
&gt;<br>
&gt; Can you check what the PCI latency timers on your devices are set<br>
&gt; to, and whether increasing the latency timer on your NIC relative<br>
&gt; to the tuner helps?<br>
&gt;<br>
<br>
</div>Currently, both are zero (my lspci results with and without the tuner=
<br>
are<br>
at <a href=3D"http://paste.ubuntu.com/405203/" target=3D"_blank">http://pas=
te.ubuntu.com/405203/</a> )<br>
<br>
I&#39;ll try increasing the NIC latency tonight, but since the tuner is PCI=
<br>
express, this wiki page <a href=3D"http://www.mythtv.org/wiki/PCI_Latency" =
target=3D"_blank">http://www.mythtv.org/wiki/PCI_Latency</a> seems to<br>
indicate that it won&#39;t make a difference. =A0(See the paragraph about P=
CIe<br>
near the bottom of the page.) =A0I don&#39;t know whether the NIC is PCI or=
<br>
PCIe, since it is onboard. =A0Is there anything in the lspci results that<b=
r>
would tell me?<br>
<br>
I wonder if I should be looking at the latency numbers for the PCI<br>
bridges? =A0When I install the tuner, I also get another bridge in the<br>
lspci listing...<br>
<div class=3D"im"><br>
John Kasunich<br>
<br>
<br>
<br>
--<br>
 =A0John Kasunich<br>
 =A0<a href=3D"mailto:jmkasunich at fastmail.fm">jmkasunich at fastmail.fm</a><br=
>
<br>
_______________________________________________<br>
</div><div><div></div><div class=3D"h5">mythtv-users mailing list<br>
<a href=3D"mailto:mythtv-users at mythtv.org">mythtv-users at mythtv.org</a><br>
<a href=3D"http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users" target=
=3D"_blank">http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users</a><br>
</div></div></blockquote></div><br><br clear=3D"all"><br>-- <br>Rob Shields=
<br>Email: <a href=3D"mailto:rwshields at gmail.com">rwshields at gmail.com</a><b=
r>CWRU Computer Science PhD Student<br>S.A.G.E. Project Developer (<a href=
=3D"http://darwin.cwru.edu/">http://darwin.cwru.edu/</a>)<br>


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