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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'><br>
<font color=navy><span style='color:navy'>> </span></font>Hi,<br>
<br>
<font color=navy><span style='color:navy'>> </span></font>I benchmarked
performance of my network, which contains ppc405EX (<st1:place w:st="on">Kilauea</st1:place>
board, kernel 2.6.30 from Denx) connected with a linux desktop via gigabit
ethernet. I used the <font color=navy><span style='color:navy'>> </span></font>netperf
tool: <br>
<br>
<font color=navy><span style='color:navy'>> </span></font>netperf -t
UDP_STREAM -H 192.168.1.1 -- -m 32768<br>
<br>
<font color=navy><span style='color:navy'>> </span></font>So I was sending
UDP packets to the desktop. The resulting speed was about 370 Kb/s. I tried to
send the packets to several different computers - with the same result. So the <font
color=navy><span style='color:navy'>></span></font>ppc board is the
bottleneck in this case.<br>
<br>
<font color=navy><span style='color:navy'>> </span></font>Is there any
possibility to improve the gigabit capabilities of the ppc405EX? Is there
anyone who achieved a better performance with ppc4xx boards?<font color=navy><span
style='color:navy'><o:p></o:p></span></font></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>We have
seen also bad performances with Gig Ethernet with ppc405ex. One
optimisation we have done is interrupt coalescing in ibm_new_mac. This
gives near 25% of txput gain. Unfortunately, this optimisation is not yet
on denx git. We got it from AMCC directly. Also, it looks like that
2.6 kernel is much slower then 2.4 on ppc405ex. This is probably due to
IPC and/or context switching. We have not yet found a solution to
this. However, 370Kb/s (3Mbits/s) look like very poor. In the worst
case with 100% CPU used to send UDP data on network with the ppc405ex 600MHz,
we got 190Mbits/s on Gig eth. It looks like netperf does not stress the
ppc405ex ant it network at is maximum.<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 color=navy
face=Arial><span style='font-size:10.0pt;font-family:Arial;color:navy'>Sylvain<o:p></o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=2 face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'><br>
<br>
<br>
<o:p></o:p></span></font></p>
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<hr size=2 width="100%" align=center>
</span></font></div>
<p class=MsoNormal><font size=2 face=SimSun><span lang=ZH-CN style='font-size:
10.0pt'>立刻下载</span></font><font size=2 face=Verdana><span style='font-size:
10.0pt;font-family:Verdana'> MSN </span></font><font size=2><span lang=ZH-CN
style='font-size:10.0pt'>保护盾，保障</span></font><font size=2 face=Verdana><span
style='font-size:10.0pt;font-family:Verdana'> MSN </span></font><font size=2><span
lang=ZH-CN style='font-size:10.0pt'>安全稳定！</span></font><font size=2
face=Verdana><span lang=ZH-CN style='font-size:10.0pt;font-family:Verdana'> </span></font><font
size=2 face=Verdana><span style='font-size:10.0pt;font-family:Verdana'><a
href="http://im.live.cn/safe/" target="_new"><font face=SimSun><span
lang=ZH-CN style='font-family:SimSun'>现在就下载！</span></font></a><o:p></o:p></span></font></p>
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