Le 8 sept. 07 à 01:05, Andre Oppermann a écrit :
Mike Tancsa wrote:
On Thu, 6 Sep 2007 15:12:06 +0200, in sentex.lists.freebsd.net you
wrote:
After many years of good services we will stop using FreeBSD 4.x :)
During my performance regression tests under FreeBSD 6.2 i've
found that polling has lower performance than interrupt.
To solve that issue i've rewritten the core of polling to be more
SMP ready.
Hi,
This is really interesting work! Reading the pdf file, it
seems forwarding performance on 6 and 7 is still much lower than
RELENG_4 ? is that correct ?
Haven't tested RELENG_4 performance in a controlled environment and
thus can't answer the question directly. However using fastforward
on 6 and 7 is key to good performance. Without it you're stuck at
some 150-200kpps, perhaps 300kpps. With it you get to 500-800kpps.
Using net.isr.direct is the key success and can get much better
forwarding rate (intermediate queue kill the performance).
i aggree than using fastforwarding gets another big step because
there is a lot less code than on the IP stack:
FreeBSD 6.2 using fastforward on 64bytes packets (L3 Mb/s):
pollng 1CPU: 156
pollng 2CPU: 123
intr: 144
pollng 1CPU fastfwd: 221
pollng 2CPU fastfwd: 270
intr fastfwd: 211
Fabien
--
Andre
---Mike
You can find a summary of all my tests and the source code at
the following address:
http://www.netasq.com/opensource/pollng-rev1-freebsd.tgz
Feel free to ask more detailed information if necessary and
report any bugs / comments.
Fabien
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--------------------------------------------------------
Mike Tancsa, Sentex communications http://www.sentex.net
Providing Internet Access since 1994
[EMAIL PROTECTED], (http://www.tancsa.com)
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