The EFF launches a router project [LWN.net]

The EFF launches a router project

Posted Jul 29, 2014 22:17 UTC (Tue) by dlang (guest, #313)
In reply to: The EFF launches a router project by arnd
Parent article: The EFF launches a router project

Well, since there is more processing being done with active queue management, the I/O thoughput isn't the limiting factor.

I've had testing done with the 3800 with a very stripped down kernel (down to disabling connection tracking and all firewalling because it wasn't needed for the application), and the number reported back was that it topped out at 300Mb/sec

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The EFF launches a router project

Posted Jul 30, 2014 2:31 UTC (Wed) by mtaht (guest, #11087) [Link]

I need to point out there is nearly zero cpu impact of the new queue management stuff, be it aqm or fair queuing. There are even beneficial cache effects from keeping the queues shorter with BQL, also -

the real killer for cpu is the cost software rate limiting, which accounts for like 82% of the overhead before a box flatlines. (I confirm the peak forwarding rate for the wndr3800 appears to be about 330mbit/sec with no iptables rules using fq_codel on the ethernet device, and about 50mbit with software rate limiting)

I'd like to come up with a better rate limiter, and feel that hardware assistance is going to be needed with the current generation of arm router based products as well.