broken re(4)
Gerrit Kühn
gerrit at pmp.uni-hannover.de
Wed Jun 11 15:37:59 UTC 2008
On Wed, 11 Jun 2008 17:26:29 +0200 (CEST) Oliver Fromme
<olli at lurza.secnetix.de> wrote about Re: broken re(4):
OF> > On the other hand, I have not been able to get more than about
OF> > 10MByte/s through the interfaces of this particular system. I have
OF> > 1GBit-networking equipment, and the other systems (which are used
OF> > as router) have no problem doing a throughput of >20MB/s. Even
OF> > bonding the two interfaces using lagg(4) does not improve the
OF> > performance - where else could be the bottleneck?
OF> A few questions or hints ...
OF> - What is the CPU usage during your network test (user,
OF> sys, intr, idle)?
I will test and report that tomorrow.
OF> - Do you see errors in "netstat -i"?
None.
OF> - Do you use jumbo frames?
No.
OF> - Is polling enabled?
No. I tested polling on a lot of different machines earlier and never
found it to improve performance so far (same for jumbo frames, btw).
OF> - Are there any network-related sysctls (/etc/sysctl.conf)
OF> or kernel settings? Have you enabled kernel debugging
OF> features (INVARIANTS, WITNESS etc.)?
No, stock GENERIC, only with a lot of things disabled.
OF> - Do you have any packet filter rules (PF, IPF, IPFW)?
No, not on this machine. The faster machines are router/firewalls, they do
filtering; so it should be something different...
cu
Gerrit
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