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<DIV dir=ltr align=left><SPAN class=330104921-06112007><FONT face=Arial
size=2>I'm using e1000 cards.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=330104921-06112007><FONT face=Arial
size=2>According to oprofile, around 50% of the time is spent in the e1000
driver. </FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=330104921-06112007><FONT face=Arial
size=2>Given that my load average is still under 0.5, I suspect I've got plenty
of room for the driver to handle more traffic before I need to worry too
much.</FONT></SPAN></DIV>
<DIV dir=ltr align=left><SPAN class=330104921-06112007></SPAN> </DIV><BR>
<DIV class=OutlookMessageHeader lang=en-us dir=ltr align=left>
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<FONT face=Tahoma size=2><B>From:</B> Vaidas M [mailto:admin@vdx.lt]
<BR><B>Sent:</B> Tuesday, 6 November 2007 9:32 PM<BR><B>To:</B> Leigh
Sharpe<BR><B>Subject:</B> RE: [Bridge] Lowering CPU
utilisation<BR></FONT><BR></DIV>
<DIV></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Tahoma','sans-serif'">What
kind of NIC you are using?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Tahoma','sans-serif'">I
suggest you to use cards with NAPI featured in driver.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Tahoma','sans-serif'"><o:p> </o:p></SPAN></P>
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style="FONT-SIZE: 10pt; COLOR: #1f497d; FONT-FAMILY: 'Tahoma','sans-serif'">_
_ _ _ _ _ _ __ ___
____ _____<o:p></o:p></SPAN></P>
<P class=MsoNormal style="TEXT-ALIGN: right" align=right><B><SPAN
style="FONT-SIZE: 10pt; COLOR: #1f497d; FONT-FAMILY: 'Tahoma','sans-serif'">Vaidas
M</SPAN></B><SPAN
style="FONT-SIZE: 10pt; COLOR: #1f497d; FONT-FAMILY: 'Tahoma','sans-serif'">.
<o:p></o:p></SPAN></P></DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 11pt; COLOR: #1f497d; FONT-FAMILY: 'Tahoma','sans-serif'"><o:p> </o:p></SPAN></P>
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<P class=MsoNormal><B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">From:</SPAN></B><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Tahoma','sans-serif'">
bridge-bounces@lists.linux-foundation.org
[mailto:bridge-bounces@lists.linux-foundation.org] <B>On Behalf Of </B>Leigh
Sharpe<BR><B>Sent:</B> Thursday, November 01, 2007 12:00 AM<BR><B>To:</B>
bridge@lists.linux-foundation.org<BR><B>Subject:</B> [Bridge] Lowering CPU
utilisation<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P>
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<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Hi All,
</SPAN><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'"> I have a box
with 12 bridges on it, each of which has 2 ports.</SPAN><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">When the traffic
level on the box reaches around 15-20Mbps on each bridge, my CPU utilisation
gets to about 90-95%.</SPAN><o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">I would like to avoid
working the CPU that hard. Is there anything which can be done to get the CPU
utlilisation down a bit? I have plans for an even bigger bridge, but these
results indicate that it may not scale quite that
well.</SPAN><o:p></o:p></P></DIV>
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<P class=MsoNormal> <o:p></o:p></P></DIV>
<P class=MsoNormal><SPAN
style="FONT-SIZE: 10pt; FONT-FAMILY: 'Arial','sans-serif'">Regards,<BR>
Leigh</SPAN><o:p></o:p></P>
<P class=MsoNormal> <o:p></o:p></P>
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