Tool/software: Linux
Hi
We are using kernel version 4.9.28 on our custom AM335x board.
We are seeing performance issues with USB Wi-Fi dongle (RTL8192EU rev B) as compared to other dongles .
when run the ping flood test and having packet size as MTU size , the roud trip time is very high as compared to other dongles .
Can i be guided if any updated drivers for this chipset (RTL8192EU rev B) are available which can help improve the performance .
Relevant Information is as follows :
2) performance figures with ping "flood" test :
# cat /sys/class/net/wlan0/mtu
1500
a) USB Wi-Fi dongle (RTL8192EU rev B) :
1) dmesg :
[ 1537.355145] usb 2-1.3: RTL8192EU rev B (SMIC) 2T2R, TX queues 3, WiFi=1, BT=0, GPS=0, HI PA=0
[ 1537.365534] usb 2-1.3: RTL8192EU MAC: 00:13:ef:f1:00:03
[ 1537.371957] usb 2-1.3: rtl8xxxu: Loading firmware rtlwifi/rtl8192eu_nic.bin
[ 1537.383405] usb 2-1.3: Firmware revision 19.0 (signature 0x92e1)
[ 1538.353382] usbcore: registered new interface driver rtl8xxxu
2)Test :
ping -f -s 1500 192.168.3.1 ( 192.168.3.1 is the IP of Wi-Fi AP to which ping is attempted ).
--- 192.168.3.1 ping statistics ---
31858 packets transmitted, 27525 received, +16 errors, 13% packet loss, time 866363ms
rtt min/avg/max/mdev = 106.114/4339.536/21941.006/3631.444 ms, pipe 1610, ipg/ewma 27.195/1016.268 ms
--- 192.168.3.1 ping statistics ---
22706 packets transmitted, 21023 received, +124 errors, 7% packet loss, time 1097744ms
rtt min/avg/max/mdev = 260.068/3172.185/17390.604/2491.316 ms, pipe 1461, ipg/ewma 48.348/5870.300 ms
b) Linksys cisco dongle (Better Working )
1) dmesg ::
[ 2041.218734] usb 2-1.3: new high-speed USB device number 9 using musb-hdrc
[ 2041.344729] usb 2-1.3: New USB device found, idVendor=1737, idProduct=0079
[ 2041.352495] usb 2-1.3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 2041.361174] usb 2-1.3: Product: Linksys WUSB600N Wireless-N USB Network Adapter with Dual-Band ver. 2
[ 2041.371295] usb 2-1.3: Manufacturer: Linksys
[ 2041.460742] usb 2-1.3: reset high-speed USB device number 9 using musb-hdrc
[ 2041.567459] ieee80211 phy3: rt2x00_set_rt: Info - RT chipset 3572, rev 0221 detected
[ 2041.594587] ieee80211 phy3: rt2x00_set_rf: Info - RF chipset 0009 detected
2)Test :
ping -f -s 1500 192.168.3.1
132839 packets transmitted, 131663 received, +19 errors, 0% packet loss, time 892633ms
rtt min/avg/max/mdev = 1.427/10.563/658.803/37.037 ms, pipe 4862, ipg/ewma 6.719/7.828 ms
