On Wed, Jan 09, 2013 at 12:03:44PM +0100, Stanislaw Gruszka wrote: > Hi > > On Tue, Jan 08, 2013 at 12:10:45PM -0600, Seth Forshee wrote: > > Leaving powersave enabled while the scan is suspended requires the use > > of PS-Poll to retrieve frames buffered at the AP. PS-Poll isn't a very > > efficient means of data transfer and may not even work with drivers not > > supporting powersave. These problems can largely be avoided by simply > > disabling off-channel powersave when the scan is suspended and enabling > > it again when returning to off-channel operation. > > > > The results of this change are fantastic. Previously when using iperf I > > would see greatly decreased throughput (often dropping to 0 bits/sec for > > several seconds) and very high packet loss during software scans. This > > patch completely eliminates the packet loss and reduces the loss in > > throughput to very reasonable levels. > > I posted a patch, which remove offchannel_ps_disable argument from > ieee80211_offchannel_return, since there were possible AP and STA power > save state mismash: > > http://marc.info/?l=linux-wireless&m=135601089321822&w=2 > > It should give the same effect on performance as this patch. I guess I missed that one in my pile of post-holiday emails. I agree, it ought to have the same effect as this patch. Seth -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
