Re: 10GBE performance drop with net.ipv4.tcp_timestamps=0

On Tue, 2012-06-19 at 23:08 +0200, Stefan Priebe wrote:

Hello List,

i'm testing 10GBE speed with tweo servers. One with 3.5-rc3 nd thoe 
other one whith RHEL 6 (2.6.32 kernel).

I noticed that setting
net.ipv4.tcp_timestamps=0

descreased the performance from 9,7 Full Duplex to 3-4Gb/s.

Is this bahviour fine? What should / could i tet?

Really, you should provide more input than that, if you really want us
to help.