Unable to reach network speeds (not even close)

[melroy89]

Distribution

Linux Mint 22.1

Package version

1.8.8

Frequency

Always

Bug description

I get around 183Megabyte/s transfer speed. Which is 1.46 Gbit/s. However, with a 10Gbit/s network I would assume to reach higher speeds :).

Steps to reproduce

• Use a 10Gbit/s switch (or direct link between two computers, if you do not have such a switch)
• Use 10GbE network cards on both sides
• Use latest Warpinator (v1.8.8)
• Disable compression
• Transfer a large file (eg. 4Gigabyte file or bigger)
• Notice the network speed limits of Warpinator

Expected behavior

Reading close to the iperf3 results or at least match the Filezilla results. Filezilla gives me 415 MByte/s = 3.32 Gbit/s.

Internal iperf3 test between the two computers:

iperf3 -c 192.168.1.204 -p 5201
Connecting to host 192.168.1.204, port 5201
[  5] local 192.168.1.217 port 41108 connected to 192.168.1.204 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  1.08 GBytes  9.24 Gbits/sec    0   1.59 MBytes       
[  5]   1.00-2.00   sec  1.07 GBytes  9.21 Gbits/sec    0   1.66 MBytes       
[  5]   2.00-3.00   sec  1.07 GBytes  9.23 Gbits/sec    0   1.82 MBytes       
[  5]   3.00-4.00   sec  1.07 GBytes  9.22 Gbits/sec    0   1.82 MBytes       
[  5]   4.00-5.00   sec  1.07 GBytes  9.21 Gbits/sec    0   1.82 MBytes       
[  5]   5.00-6.00   sec  1.07 GBytes  9.23 Gbits/sec    0   1.82 MBytes       
[  5]   6.00-7.00   sec  1.07 GBytes  9.21 Gbits/sec    0   1.82 MBytes       
[  5]   7.00-8.00   sec  1.07 GBytes  9.20 Gbits/sec    0   1.82 MBytes       
[  5]   8.00-9.00   sec  1.07 GBytes  9.21 Gbits/sec    0   1.82 MBytes       
[  5]   9.00-10.00  sec  1.07 GBytes  9.22 Gbits/sec    0   1.82 MBytes       
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  10.7 GBytes  9.23 Gbits/sec    0             sender
[  5]   0.00-10.00  sec  10.7 GBytes  9.22 Gbits/sec                  receiver

iperf Done.

Iperf3 confirms 10Gbit/s connection. And Filezilla allows me to transfer around 3.32 Gbit/s. SFP might not be the best way of transferring files after all, since SFTP has SSH overhead.

Additional information

Request for help: Can somebody else also try to do some testings on their network? Ideally on 10GbE networks to see where the bottlenecks / limits are of Warpinator.

Some ideas:

• Python bottleneck?
• CPU bottleneck?
• Disk bottlenck?
• TCP/MTU limits (I doubt it)?

---

With compression it gets really slow (so I would not recommended that option for sure):

[tuxayo]

Do you have a CPU process maxed at 100%?

[melroy89]

Do you have a CPU process maxed at 100%?

Good question. That would rule out or confirm a cpu bottleneck of warpinator.

I will need to do a new speedtest measurement.