It sounds sensible, but I have also learned that throwing hardware on a
problem is not always right.. Compared to shiny boxes from Cisco, HP
etc. a 500 Mhz router is for heavy duty networks. I would try some more
tweaking before replacing the box with some more spectular hardware.
- E.
Michael DeMan wrote:
The rule of thumb I have seen on Intel/UNIX based routers is that you
want 1GHz of CPU for every gigabit of throughput.
Also, on gigabit NICs, make sure you have a 64-bit PCI bus on the
motherboard.
Michael F. DeMan
Director of Technology
OpenAccess Network Services
Bellingham, WA 98225
[EMAIL PROTECTED]
360-647-0785
On Apr 19, 2005, at 1:40 PM, Eivind Hestnes wrote:
Thanks for the advice. Didn't do any difference, though.. Perhaps I
should try to increase the polling frequency..
Jerald Von Dipple wrote:
Hey man
You need to bump
kern.polling.burst: 150
Upto at least 150000
Regards,
Jerald Von D.
On 4/19/05, Eivind Hestnes <[EMAIL PROTECTED]> wrote:
Hi,
I have an Intel Pro 1000 MT (PWLA8490MT) NIC (em(4) driver 1.7.35)
installed
in a Pentium III 500 Mhz with 512 MB RAM (100 Mhz) running FreeBSD
5.4-RC3.
The machine is routing traffic between multiple VLANs. Recently I
did a
benchmark with/without device polling enabled. Without device
polling I was
able to transfer roughly 180 Mbit/s. The router however was
suffering when
doing this benchmark. Interrupt load was peaking 100% - overall the
system
itself was quite unusable (_very_ high system load). With device
polling
enabled the interrupt kept stable around 40-50% and max transfer
rate was
nearly 70 Mbit/s. Not very scientific tests, but it gave me a pin
point.
However, a Pentium III in combination with a good NIC should in my
opinion
be a respectful router.. but I'm not satisfied with the results.
The pf
ruleset is like nothing, and the kernel is stripped and customized
for best
performance.
Any tweaking tips for making my router perform better?
Debug information:
[EMAIL PROTECTED]:~$ sysctl -a | grep kern.polling
kern.polling.burst: 150
kern.polling.each_burst: 5
kern.polling.burst_max: 150
kern.polling.idle_poll: 0
kern.polling.poll_in_trap: 0
kern.polling.user_frac: 50
kern.polling.reg_frac: 20
kern.polling.short_ticks: 1411
kern.polling.lost_polls: 720
kern.polling.pending_polls: 0
kern.polling.residual_burst: 0
kern.polling.handlers: 0
kern.polling.enable: 1
kern.polling.phase: 0
kern.polling.suspect: 186
kern.polling.stalled: 0
kern.polling.idlepoll_sleeping: 1
[EMAIL PROTECTED]:~$ cat /etc/sysctl.conf
net.inet.ip.forwarding=1
net.inet.ip.fastforwarding=1
net.inet.carp.preempt=1
kern.polling.enable=1
HZ set to 1000 as recommended in README for the em(4) driver.
Driver is of
cource compiled into kernel.
Regards,
Eivind Hestnes
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