On 04/12/2016 07:52 AM, Eric Dumazet wrote:
On Tue, 2016-04-12 at 12:17 +0000, Machani, Yaniv wrote:
Hi,
After updating from Kernel 3.14 to Kernel 4.4 we have seen a TCP performance
degradation over Wi-Fi.
In 3.14 kernel, TCP got to its max throughout after less than a second, while
in the 4.4 it is taking ~20-30 seconds.
UDP TX/RX and TCP RX performance is as expected.
We are using a Beagle Bone Black and a WiLink8 device.
Were there any related changes that might cause such behavior ?
Kernel configuration and sysctl values were compared, but no significant
differences have been found.
If you are using 'Cubic' TCP congestion control, then please try something
different.
It was broken last I checked, at least when used with the ath10k driver.
https://marc.info/?l=linux-netdev&m=144405216005715&w=2
Thanks,
Ben
--
Ben Greear <gree...@candelatech.com>
Candela Technologies Inc http://www.candelatech.com
