On Wed, Dec 21, 2016 at 11:03:33AM +0100, 76nem...@gmx.ch wrote: > > Here is the result of the difference on the router. I have had > a look on it and I see that no "fast forward" are used.
It is indeed odd that you're not fast forwarding. Do you have firewall rules or IPsec policies installed? Can you try a test with more than one stream? If the results are higher, try a test with larger socket buffers -- much larger -- on both sender and receiver. A long time ago, I found that 'wm' forwarding performance was more sensitive to interrupt latency than I expected, and I did a little work tuning the interrupt mitigation settings in the driver, but I didn't really care about single-stream performance. Finally, if you boot with -1, I am curious whether performance goes up. A kernel profile -- better, perhaps some data gathered with DTrace FBT -- might be helpful, as might the output of lockstat. Thor
