Hey there
I'm wondering why my file transfer speed of a single file (over VPN, tested with Wireguard and OpenVPN) isn't saturating my max download speed of my current location. The bandwidth of my current location are 85 Mbit/s down and 35 Mbit/s up. The VPN Server I'm connected to is my home with symmetric 1 Gbit/s. When I'm at home gigabit speeds are no problem. At my current location however I only get the full bandwidth when I'm doing a Speedtest but not if I'm doing a file transfer. (movie 10-20GB with FTP protocol, also tried SMB or SFTP and iperf3 = same result) Another observation I made is when I'm downloading two movies simultaneous, the "line" gets saturated. But with a single movie I only get around 40 ish Mbit/s. Do you have any suggestion what I can do to solve this strange behavior?
Most likely the CPU is fully utilized.
Run the following when you are downloading something:
ubus call system board; top
What hardware are running the vpn server and client?
fwiw, when using iperf3, did you use the -P <no. of threads> switch on the iperf3 client, because I think it is only single thread by default?
Thank you for your fast respond! That's what I got while downloading one movie. (40 Mbit/s)
Mem: 2370484K used, 13963020K free, 2400K shrd, 2800K buff, 2280372K cached
CPU: 0% usr 2% sys 0% nic 91% idle 0% io 0% irq 6% sirq
Load average: 0.17 0.06 0.02 3/103 23208
PID PPID USER STAT VSZ %VSZ %CPU COMMAND
11193 2 root RW 0 0% 1% [kworker/3:2]
22960 2 root IW 0 0% 1% [kworker/2:3]
22952 2 root IW 0 0% 1% [kworker/0:1]
22950 2 root IW 0 0% 1% [kworker/1:1]
23084 2 root IW 0 0% 0% [kworker/1:2]
19 2 root SW 0 0% 0% [ksoftirqd/2]
9639 2 root IW 0 0% 0% [kworker/2:0]
22954 2 root IW 0 0% 0% [kworker/2:2]
26621 2 root IW 0 0% 0% [kworker/0:3]
24 2 root SW 0 0% 0% [ksoftirqd/3]
7 2 root SW 0 0% 0% [ksoftirqd/0]
22982 2 root IW 0 0% 0% [kworker/3:3]
11721 1 nobody S 5172 0% 0% /usr/sbin/openvpn --syslog openvpn(custom_config) -
17999 2513 root S 4012 0% 0% /usr/sbin/smbd -F
23041 23021 root S 3940 0% 0% /usr/libexec/sftp-server
4030 1 root S 3196 0% 0% /usr/sbin/fwknopd --foreground --syslog-enable -c /
2514 1 root S 2912 0% 0% /usr/sbin/nmbd -F
2513 1 root S 2856 0% 0% /usr/sbin/smbd -F
1814 1 root S 1792 0% 0% /sbin/rpcd -s /var/run/ubus.sock -t 30
2348 1 root S 1708 0% 0% /usr/sbin/uhttpd -f -h /www -r D -x /cgi-bi
2021 1 root S 1268 0% 0% /sbin/netifd
1 0 root S 1168 0% 0% /sbin/procd
3760 1 dnsmasq S 1144 0% 0% /usr/sbin/dnsmasq -C /var/etc/dnsmasq.conf.cfg01411
2054 1 root S 1084 0% 0% /usr/sbin/odhcpd
23067 23042 root R 1084 0% 0% top
23042 23021 root S 1084 0% 0% -ash
2122 1 root S 1076 0% 0% /usr/sbin/crond -f -c /etc/crontabs -l 5
4076 1 root S< 1076 0% 0% /usr/sbin/ntpd -n -N -S /usr/sbin/ntpd-hotplug -p 0
26131 2021 root S 1072 0% 0% udhcpc -p /var/run/udhcpc-eth0.pid -s /lib/netifd/d
2398 1 root SN 1016 0% 0% /usr/sbin/nlbwmon -o /var/lib/nlbwmon -b 524288 -i
13482 1964 root S 1000 0% 0% /usr/sbin/dropbear -F -P /var/run/dropbear.1.pid -a
23021 1964 root S 1000 0% 0% /usr/sbin/dropbear -F -P /var/run/dropbear.1.pid -a
1783 1 root S 964 0% 0% /sbin/logd -S 64
1442 1 root S 916 0% 0% /sbin/ubusd
1964 1 root S 888 0% 0% /usr/sbin/dropbear -F -P /var/run/dropbear.1.pid -a
3605 2021 root S 808 0% 0% odhcp6c -s /lib/netifd/dhcpv6.script -Ntry -P0 -t12
1457 1 root S 780 0% 0% /sbin/urngd
1444 1 root S 720 0% 0% /sbin/askfirst /usr/libexec/login.sh
9163 2 root IW 0 0% 0% [kworker/2:1]
8 2 root IW 0 0% 0% [rcu_sched]
14 2 root SW 0 0% 0% [ksoftirqd/1]
26480 2 root IW 0 0% 0% [kworker/1:3]
^C120 2 root SW 0 0% 0% [usb-storage]
Also thank you for your fast respond!
So on my server side I'm rocking a i7 4510u and 16 gigs of ram. OpenWrt 19.07.4 r11208-ce6496d796 is running on a usb stick and a 256GB SSD is for network shares. (not my NAS)
On my client side I'm using a Lenovo Laptop, to be more precise the Yoga 910-IKB with a i7 7500u and 8 gigs of ram. (running Windows 10)
And the iperf3 with more then one stream didn't make a difference.
Hey again. The problem is on my windows 10 VPN client. For some reason it caps the download speeds in half...... (tested on another laptop, there everything worked fine!)
I have no clue why. If you have any suggestion, they are very welcome!
Do you have a USB-ethernet adapter for your Lenovo to see if wifi vs ethernet makes any difference?
Is there any 3rd party antivirus/security software running on the Lenovo?
Yes, I tested with a USB-ethernet adapter, because the wifi here is capped.
And no I'm using windows defender.
I found the evildoer, it was the sketchy Advanced System Care 13 from IObit.
Thank you all for your suggestions and have a nice day!
This topic was automatically closed 10 days after the last reply. New replies are no longer allowed.