Re: _High_ CPU usage while routing (mostly) small UDP packets

Karsten Desler [off-list ref] wrote:

Current packetload on eth0 (and reversed on eth1):
  115kpps tx
  135kpps rx

I totally forgot to mention: There are approximately 100k concurrent
flows.

From dmesg:

IP: routing cache hash table of 16384 buckets, 128Kbytes

Maybe there is some contention on the rt_hash_table spinlocks?
Is the attached patch enough to increase the size?

- Karsten