Other Parts Discussed in Thread: WL1837MOD,
We are facing a low throughput issue with WiLink8.0 module WL1837MOD. Hardware is TIs am57xx-evm with Linux kernel 4.4.32. wlcore firmware (Rev 8.9.0.1.55).
It is configured to work with 5Ghz in AP mode. Problem is iperf results show TCP transmission throughput only ~12Mbits/sec. This we measured using ATS utility in iPhone. throughput is expected be around 80Mbits/sec.
We have tried other settings like changing to different channel, 2.4GHz band, other H/W capabilities like ieee80211n. Still no change in throughput.
Also tried changing TCP congestion algorithm in "Reno" mode as mentioned under below link. Still no improvement in the throughput.
e2e.ti.com/.../2027577
Any suggestion is appreciated. Please let us know if more information is required.
Thanks in advance!
Client iperf command executed by ATS utility:
iperf -p 5001 -l 131072 -w 131072 -w 131072 -i 1.0 -c 192.168.43.1 -t 1.0
root@am57xx-evm:~# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 4] local 192.168.43.1 port 5001 connected with 192.168.43.21 port 50132
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.1 sec 12.2 MBytes 10.2 Mbits/sec
[ 5] local 192.168.43.1 port 5001 connected with 192.168.43.21 port 50133
[ 5] 0.0-10.1 sec 14.4 MBytes 11.9 Mbits/sec
[ 4] local 192.168.43.1 port 5001 connected with 192.168.43.21 port 50134
[ 4] 0.0-10.1 sec 14.4 MBytes 12.0 Mbits/sec
[ 5] local 192.168.43.1 port 5001 connected with 192.168.43.21 port 50135
[ 5] 0.0-10.1 sec 15.5 MBytes 12.9 Mbits/sec
[ 4] local 192.168.43.1 port 5001 connected with 192.168.43.21 port 50136
[ 4] 0.0-10.1 sec 14.4 MBytes 12.0 Mbits/sec
root@am57xx-evm:~# iw dev wlan1 info
Interface wlan1
ifindex 6
wdev 0x2
addr a8:1b:6a:6a:9e:ac
ssid wilink_8
type AP
wiphy 0
channel 36 (5180 MHz), width: 40 MHz, center1: 5190 MHz
root@am57xx-evm:~# cat /usr/share/wl18xx/hostapd.conf
interface=wlan1
driver=nl80211
ssid=wilink_8
channel=36
ht_capab=[HT40+]
macaddr_acl=0
auth_algs=1
ignore_broadcast_ssid=0
wpa=2
wpa_passphrase=abc123
wpa_key_mgmt=WPA-PSK
wpa_pairwise=TKIP
rsn_pairwise=CCMP
hw_mode=a
ieee80211n=1
country_code=US
vendor_elements=dd2d00a040000002B0220206416c6c476f000306446576313000040301020306065cf370700a180706f4f26d1d9ebb