Hello Felix, * Felix Fietkau <n...@openwrt.org> [2011-04-05 17:59]: > On 2011-04-05 5:44 PM, Bernhard Walle wrote: > > > >we're using a PCIe AR9280 card on a Octeon MIPS CPU. The system > >that does the transmission has a high CPU utilization: > > > >iperf in UDP mode with 50M bandwith has ~90 % CPU utilization with a > >high softirq proportion. > > > >Using an Intel card (5300) has a lower CPU utilization (~60 %), but it's > >no option to use it because the Linux driver has no access point mode. > > > >Are there any tweaks to decrease the CPU utilization with the ath9k > >driver? Any recommendations for the application to send the network > >packets more efficient? > What kernel version are you using? Are you using the in-kernel ath9k > or are you using compat-wireless? I have added quite a few
I'm using 2.6.38.1 ath9k which is at ~80 % CPU, starting from 2.6.37.1 with ~90 % CPU which was still an improvement. Do you think that compat-wireless gives still a performance boost? > Which > performance optimizations over time, as I'm working with much slower > MIPS CPUs than the octeon. > In my tests, a 300 MHz MIPS 24K CPU is good enough for handling > around 90 mbit/s of traffic with only around 70% CPU utilization. That sounds interesting. Any other optimisations other than using compat-wireless? Regards, Bernhard _______________________________________________ ath9k-devel mailing list ath9k-devel@lists.ath9k.org https://lists.ath9k.org/mailman/listinfo/ath9k-devel
