[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

fedora 14 kernel performance with ip forwarding workload



The other day I was running the stock fedora kernel on my ip
forwarding setup, to see what the performance was, and the performance
wasn't very good.

system is S5520HC dual socket 2.93GHz Xeon 5570 (Nehalem) with 3 quad
port 82580 adapters (12 ports).  Traffic is bidirectional 64 byte
packets being forwarded and received on each port, basically port to
port routing.  I am only using 12 flows currently.

The driver is igb, and I am using an affinity script that lines up
each pair of ports that are forwarding traffic into optimal
configurations for cache locality.  I am also disabling
remote_node_defrag_ratio to stop cross node traffic.

With the fedora default kernel from F14 it appears that
CONFIG_NETFILTER=y means that I cannot unload all of netfilter even if
I stop iptables service.

perf showed netfilter being prominent, and removing it gives me much
higher throughput.  Is there a reason CONFIG_NETFILTER=y ?  Isn't it a
good thing to be able to disable netfilter if you want to?

Jesse
_______________________________________________
kernel mailing list
kernel@xxxxxxxxxxxxxxxxxxxxxxx
https://admin.fedoraproject.org/mailman/listinfo/kernel


[Fedora General Discussion]     [Older Fedora Users Archive]     [Fedora Advisory Board]     [Fedora Security]     [Fedora Maintainers]     [Fedora Devel Java]     [Fedora Legacy]     [Fedora Desktop]     [ATA RAID]     [Fedora Marketing]     [Fedora Mentors]     [Fedora Package Announce]     [Fedora Package Review]     [Fedora Music]     [Fedora Packaging]     [Centos]     [Fedora SELinux]     [Deep Creek Hot Springs]     [Coolkey]     [Yum Users]     [Tux]     [Yosemite News]     [Yosemite Photos]     [Linux Apps]     [KDE Users]     [Fedora Tools]     [Fedora Art]     [Fedora Docs]     [USB]     [Asterisk PBX]

Powered by Linux