[RPI-B] [HEADS UP] DWC OTG TX path optimisation for 11-current
Hans Petter Selasky
hps at selasky.org
Fri Jul 24 12:40:08 UTC 2015
On 07/23/15 17:15, Jia-Shiun Li wrote:
> Hi,
>
> don't know if this is related.
>
> RPI2 r285700 seems to have rx performance issues.
Hi,
This is not directly related to the patch.
Can you try to tune "DWC_OTG_NAK_MAX" in the range "16 .. 255" and see
if it makes any difference?
sys/dev/usb/controller/dwc_otg.h
--HPS
>
> tx:
> jsli at rpi2:~ % iperf -c 192.168.111.192
> ------------------------------------------------------------
> Client connecting to 192.168.111.192, TCP port 5001
> TCP window size: 32.5 KByte (default)
> ------------------------------------------------------------
> [ 3] local 192.168.111.92 port 25883 connected with 192.168.111.192 port
> 5001
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.0 sec 89.5 MBytes 75.0 Mbits/sec
>
> rx:
> jsli at 4cbsd:~ % iperf -c 192.168.111.92
> ------------------------------------------------------------
> Client connecting to 192.168.111.92, TCP port 5001
> TCP window size: 32.5 KByte (default)
> ------------------------------------------------------------
> [ 3] local 192.168.111.192 port 33966 connected with 192.168.111.92 port
> 5001
> [ ID] Interval Transfer Bandwidth
> [ 3] 0.0-10.1 sec 6.75 MBytes 5.62 Mbits/sec
> jsli at 4cbsd:~ %
>
>
>
> with iperf3:
> tx:
> jsli at rpi2:~ % iperf3 -c 192.168.111.192
> Connecting to host 192.168.111.192, port 5201
> [ 4] local 192.168.111.92 port 26625 connected to 192.168.111.192 port 5201
> [ ID] Interval Transfer Bandwidth
> [ 4] 0.00-1.00 sec 8.75 MBytes 73.4 Mbits/sec
> [ 4] 1.00-2.00 sec 9.01 MBytes 75.6 Mbits/sec
> [ 4] 2.00-3.00 sec 8.98 MBytes 75.3 Mbits/sec
> [ 4] 3.00-4.00 sec 8.96 MBytes 75.1 Mbits/sec
> [ 4] 4.00-5.00 sec 8.99 MBytes 75.4 Mbits/sec
> [ 4] 5.00-6.00 sec 9.00 MBytes 75.5 Mbits/sec
> [ 4] 6.00-7.00 sec 8.88 MBytes 74.5 Mbits/sec
> [ 4] 7.00-8.00 sec 9.05 MBytes 75.9 Mbits/sec
> [ 4] 8.00-9.00 sec 9.00 MBytes 75.5 Mbits/sec
> [ 4] 9.00-10.00 sec 8.89 MBytes 74.6 Mbits/sec
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval Transfer Bandwidth
> [ 4] 0.00-10.00 sec 89.5 MBytes 75.1 Mbits/sec sender
> [ 4] 0.00-10.00 sec 89.4 MBytes 75.0 Mbits/sec
> receiver
>
> iperf Done.
> jsli at rpi2:~ %
>
> rx:
> jsli at rpi2:~ % iperf3 -c 192.168.111.192 -R
> Connecting to host 192.168.111.192, port 5201
> Reverse mode, remote host 192.168.111.192 is sending
> [ 4] local 192.168.111.92 port 23984 connected to 192.168.111.192 port 5201
> [ ID] Interval Transfer Bandwidth
> [ 4] 0.00-1.00 sec 708 KBytes 5.80 Mbits/sec
> [ 4] 1.00-2.00 sec 700 KBytes 5.73 Mbits/sec
> [ 4] 2.00-3.00 sec 680 KBytes 5.57 Mbits/sec
> [ 4] 3.00-4.00 sec 653 KBytes 5.35 Mbits/sec
> [ 4] 4.00-5.00 sec 660 KBytes 5.41 Mbits/sec
> [ 4] 5.00-6.00 sec 673 KBytes 5.51 Mbits/sec
> [ 4] 6.00-7.00 sec 696 KBytes 5.70 Mbits/sec
> [ 4] 7.00-8.00 sec 696 KBytes 5.70 Mbits/sec
> [ 4] 8.00-9.00 sec 675 KBytes 5.53 Mbits/sec
> [ 4] 9.00-10.00 sec 667 KBytes 5.47 Mbits/sec
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval Transfer Bandwidth
> [ 4] 0.00-10.00 sec 6.69 MBytes 5.61 Mbits/sec sender
> [ 4] 0.00-10.00 sec 6.69 MBytes 5.61 Mbits/sec
> receiver
>
> iperf Done.
> jsli at rpi2:~ %
>
>
> from the other side:
> (rpi2) rx:
> jsli at 4cbsd:~ % iperf3 -c 192.168.111.92
> Connecting to host 192.168.111.92, port 5201
> [ 4] local 192.168.111.192 port 31202 connected to 192.168.111.92 port 5201
> [ ID] Interval Transfer Bandwidth
> [ 4] 0.00-1.00 sec 640 KBytes 5.24 Mbits/sec
> [ 4] 1.00-2.00 sec 707 KBytes 5.79 Mbits/sec
> [ 4] 2.00-3.00 sec 700 KBytes 5.74 Mbits/sec
> [ 4] 3.00-4.00 sec 675 KBytes 5.52 Mbits/sec
> [ 4] 4.00-5.00 sec 669 KBytes 5.48 Mbits/sec
> [ 4] 5.00-6.00 sec 687 KBytes 5.63 Mbits/sec
> [ 4] 6.00-7.00 sec 714 KBytes 5.85 Mbits/sec
> [ 4] 7.00-8.00 sec 708 KBytes 5.81 Mbits/sec
> [ 4] 8.00-9.00 sec 675 KBytes 5.53 Mbits/sec
> [ 4] 9.00-10.00 sec 662 KBytes 5.42 Mbits/sec
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval Transfer Bandwidth
> [ 4] 0.00-10.00 sec 6.68 MBytes 5.60 Mbits/sec sender
> [ 4] 0.00-10.00 sec 6.63 MBytes 5.56 Mbits/sec
> receiver
>
> iperf Done.
> jsli at 4cbsd:~ %
>
> (rpi2) tx:
> jsli at 4cbsd:~ % iperf3 -c 192.168.111.92 -R
> Connecting to host 192.168.111.92, port 5201
> Reverse mode, remote host 192.168.111.92 is sending
> [ 4] local 192.168.111.192 port 41976 connected to 192.168.111.92 port 5201
> [ ID] Interval Transfer Bandwidth
> [ 4] 0.00-1.00 sec 7.85 MBytes 65.9 Mbits/sec
> [ 4] 1.00-2.00 sec 8.80 MBytes 73.8 Mbits/sec
> [ 4] 2.00-3.00 sec 8.87 MBytes 74.4 Mbits/sec
> [ 4] 3.00-4.00 sec 8.96 MBytes 75.2 Mbits/sec
> [ 4] 4.00-5.00 sec 8.98 MBytes 75.4 Mbits/sec
> [ 4] 5.00-6.00 sec 8.80 MBytes 73.8 Mbits/sec
> [ 4] 6.00-7.00 sec 8.93 MBytes 74.9 Mbits/sec
> [ 4] 7.00-8.00 sec 8.96 MBytes 75.2 Mbits/sec
> [ 4] 8.00-9.00 sec 8.94 MBytes 75.0 Mbits/sec
> [ 4] 9.00-10.00 sec 8.89 MBytes 74.6 Mbits/sec
> - - - - - - - - - - - - - - - - - - - - - - - - -
> [ ID] Interval Transfer Bandwidth
> [ 4] 0.00-10.00 sec 88.2 MBytes 74.0 Mbits/sec sender
> [ 4] 0.00-10.00 sec 88.1 MBytes 73.9 Mbits/sec
> receiver
>
> iperf Done.
> jsli at 4cbsd:~ %
>
>
> -Jia-Shiun
>
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