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What is the upload speed limit for single large file? #4

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pavelbinar opened this issue Jan 7, 2024 · 5 comments
Open

What is the upload speed limit for single large file? #4

pavelbinar opened this issue Jan 7, 2024 · 5 comments

Comments

@pavelbinar
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Hi,

Thank you for all the hard work you put into TUS!

I uploaded 1GB file, but I was not able to reach upload speed greater then 12MB/s. The client and the server was both on the 10 Gbps line.

I was using:
@Acconut
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Member

Acconut commented Jan 8, 2024

The implementations don't have any speed limit on their own implemented. I assume the performance is limited by the IO, either by the speed reading from the client's disk, the speed that data can be transferred over the network, or the speed writing to the server's disk. I would recommend you to investigate each potential bottleneck on its own and maybe that helps you to find out if they are applying to your. In my local tests, GBs are transferred in seconds, so I don't think its a flaw in the logic right now.

@pavelbinar
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Author

Hi,

Thank you for getting back to me so quickly. Unfortunately, the disk speed nor the network is the issue. Any other idea?

Disk Speed Performance

Used dd if=/dev/zero bs=1M count=10000 | cat > /dev/null to measure the disk speed.

Server

dd if=/dev/zero bs=1M count=10000 | cat > /dev/null
10000+0 records in
10000+0 records out
10485760000 bytes (10 GB, 9.8 GiB) copied, 4.41645 s, 2.4 GB/s

Client

dd if=/dev/zero bs=1M count=10000 | cat > /dev/null
10000+0 records in
10000+0 records out
10485760000 bytes transferred in 1.271594 secs (8246154040 bytes/sec)

Network Speed Performance

Used iperf3 to measure the network speed.

Server

[SUM]   0.00-10.01  sec  6.16 GBytes  5.28 Gbits/sec                  sender
[SUM]   0.00-10.09  sec  6.14 GBytes  5.23 Gbits/sec                  receiver
Test log 
iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from xxx.xxx.xxx.xxx, port 51047
[  5] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51049
[  8] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51050
[ 10] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51051
[ 12] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51052
[ 14] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51053
[ 16] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51054
[ 18] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51055
[ 20] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51056
[ 22] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51057
[ 24] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51058
[ 26] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51059
[ 28] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51060
[ 30] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51061
[ 32] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51062
[ 34] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51065
[ 36] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51066
[ 38] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51067
[ 40] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51068
[ 42] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51069
[ 44] local xxx.xxx.xxx.xxx port 5201 connected to xxx.xxx.xxx.xxx port 51070
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  2.59 MBytes  21.8 Mbits/sec
[  8]   0.00-1.00   sec  3.13 MBytes  26.3 Mbits/sec
[ 10]   0.00-1.00   sec   978 KBytes  8.01 Mbits/sec
[ 12]   0.00-1.00   sec  1.07 MBytes  8.95 Mbits/sec
[ 14]   0.00-1.00   sec   889 KBytes  7.28 Mbits/sec
[ 16]   0.00-1.00   sec   879 KBytes  7.20 Mbits/sec
[ 18]   0.00-1.00   sec  1.01 MBytes  8.45 Mbits/sec
[ 20]   0.00-1.00   sec   907 KBytes  7.43 Mbits/sec
[ 22]   0.00-1.00   sec  1.26 MBytes  10.6 Mbits/sec
[ 24]   0.00-1.00   sec  1.34 MBytes  11.3 Mbits/sec
[ 26]   0.00-1.00   sec  1.98 MBytes  16.6 Mbits/sec
[ 28]   0.00-1.00   sec  1.86 MBytes  15.6 Mbits/sec
[ 30]   0.00-1.00   sec  1.34 MBytes  11.3 Mbits/sec
[ 32]   0.00-1.00   sec  1.14 MBytes  9.54 Mbits/sec
[ 34]   0.00-1.00   sec  1.56 MBytes  13.1 Mbits/sec
[ 36]   0.00-1.00   sec   995 KBytes  8.15 Mbits/sec
[ 38]   0.00-1.00   sec  1.40 MBytes  11.8 Mbits/sec
[ 40]   0.00-1.00   sec  1.35 MBytes  11.3 Mbits/sec
[ 42]   0.00-1.00   sec  1.35 MBytes  11.4 Mbits/sec
[ 44]   0.00-1.00   sec  2.52 MBytes  21.1 Mbits/sec
[SUM]   0.00-1.00   sec  29.4 MBytes   247 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   1.00-2.00   sec  28.9 MBytes   243 Mbits/sec
[  8]   1.00-2.00   sec  30.1 MBytes   252 Mbits/sec
[ 10]   1.00-2.00   sec  22.1 MBytes   185 Mbits/sec
[ 12]   1.00-2.00   sec  24.2 MBytes   203 Mbits/sec
[ 14]   1.00-2.00   sec  23.9 MBytes   201 Mbits/sec
[ 16]   1.00-2.00   sec  20.3 MBytes   170 Mbits/sec
[ 18]   1.00-2.00   sec  23.1 MBytes   194 Mbits/sec
[ 20]   1.00-2.00   sec  23.5 MBytes   197 Mbits/sec
[ 22]   1.00-2.00   sec  24.1 MBytes   202 Mbits/sec
[ 24]   1.00-2.00   sec  24.1 MBytes   202 Mbits/sec
[ 26]   1.00-2.00   sec  27.6 MBytes   232 Mbits/sec
[ 28]   1.00-2.00   sec  26.7 MBytes   224 Mbits/sec
[ 30]   1.00-2.00   sec  25.4 MBytes   213 Mbits/sec
[ 32]   1.00-2.00   sec  25.4 MBytes   213 Mbits/sec
[ 34]   1.00-2.00   sec  26.3 MBytes   221 Mbits/sec
[ 36]   1.00-2.00   sec  22.1 MBytes   186 Mbits/sec
[ 38]   1.00-2.00   sec  26.3 MBytes   220 Mbits/sec
[ 40]   1.00-2.00   sec  23.0 MBytes   193 Mbits/sec
[ 42]   1.00-2.00   sec  25.5 MBytes   214 Mbits/sec
[ 44]   1.00-2.00   sec  26.3 MBytes   221 Mbits/sec
[SUM]   1.00-2.00   sec   499 MBytes  4.19 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[  8]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 10]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 12]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 14]   2.00-3.00   sec  34.7 MBytes   291 Mbits/sec
[ 16]   2.00-3.00   sec  35.9 MBytes   301 Mbits/sec
[ 18]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 20]   2.00-3.00   sec  35.1 MBytes   294 Mbits/sec
[ 22]   2.00-3.00   sec  35.9 MBytes   302 Mbits/sec
[ 24]   2.00-3.00   sec  35.3 MBytes   296 Mbits/sec
[ 26]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 28]   2.00-3.00   sec  35.6 MBytes   299 Mbits/sec
[ 30]   2.00-3.00   sec  34.6 MBytes   290 Mbits/sec
[ 32]   2.00-3.00   sec  35.9 MBytes   302 Mbits/sec
[ 34]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 36]   2.00-3.00   sec  34.3 MBytes   288 Mbits/sec
[ 38]   2.00-3.00   sec  35.0 MBytes   294 Mbits/sec
[ 40]   2.00-3.00   sec  35.0 MBytes   294 Mbits/sec
[ 42]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 44]   2.00-3.00   sec  34.1 MBytes   286 Mbits/sec
[SUM]   2.00-3.00   sec   709 MBytes  5.95 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   3.00-4.00   sec  36.0 MBytes   302 Mbits/sec
[  8]   3.00-4.00   sec  35.9 MBytes   301 Mbits/sec
[ 10]   3.00-4.00   sec  35.9 MBytes   301 Mbits/sec
[ 12]   3.00-4.00   sec  35.7 MBytes   299 Mbits/sec
[ 14]   3.00-4.00   sec  34.6 MBytes   290 Mbits/sec
[ 16]   3.00-4.00   sec  36.0 MBytes   302 Mbits/sec
[ 18]   3.00-4.00   sec  35.8 MBytes   301 Mbits/sec
[ 20]   3.00-4.00   sec  34.6 MBytes   290 Mbits/sec
[ 22]   3.00-4.00   sec  35.0 MBytes   293 Mbits/sec
[ 24]   3.00-4.00   sec  36.5 MBytes   306 Mbits/sec
[ 26]   3.00-4.00   sec  36.0 MBytes   302 Mbits/sec
[ 28]   3.00-4.00   sec  34.7 MBytes   291 Mbits/sec
[ 30]   3.00-4.00   sec  34.7 MBytes   291 Mbits/sec
[ 32]   3.00-4.00   sec  35.6 MBytes   299 Mbits/sec
[ 34]   3.00-4.00   sec  35.7 MBytes   299 Mbits/sec
[ 36]   3.00-4.00   sec  34.5 MBytes   289 Mbits/sec
[ 38]   3.00-4.00   sec  34.7 MBytes   291 Mbits/sec
[ 40]   3.00-4.00   sec  36.6 MBytes   307 Mbits/sec
[ 42]   3.00-4.00   sec  34.8 MBytes   292 Mbits/sec
[ 44]   3.00-4.00   sec  36.8 MBytes   309 Mbits/sec
[SUM]   3.00-4.00   sec   710 MBytes  5.96 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   4.00-5.00   sec  36.0 MBytes   302 Mbits/sec
[  8]   4.00-5.00   sec  36.0 MBytes   302 Mbits/sec
[ 10]   4.00-5.00   sec  36.0 MBytes   302 Mbits/sec
[ 12]   4.00-5.00   sec  34.1 MBytes   286 Mbits/sec
[ 14]   4.00-5.00   sec  35.6 MBytes   298 Mbits/sec
[ 16]   4.00-5.00   sec  35.9 MBytes   301 Mbits/sec
[ 18]   4.00-5.00   sec  36.0 MBytes   302 Mbits/sec
[ 20]   4.00-5.00   sec  35.1 MBytes   294 Mbits/sec
[ 22]   4.00-5.00   sec  34.7 MBytes   291 Mbits/sec
[ 24]   4.00-5.00   sec  36.0 MBytes   302 Mbits/sec
[ 26]   4.00-5.00   sec  35.6 MBytes   299 Mbits/sec
[ 28]   4.00-5.00   sec  34.7 MBytes   291 Mbits/sec
[ 30]   4.00-5.00   sec  35.2 MBytes   296 Mbits/sec
[ 32]   4.00-5.00   sec  34.9 MBytes   293 Mbits/sec
[ 34]   4.00-5.00   sec  34.8 MBytes   292 Mbits/sec
[ 36]   4.00-5.00   sec  35.5 MBytes   298 Mbits/sec
[ 38]   4.00-5.00   sec  35.2 MBytes   295 Mbits/sec
[ 40]   4.00-5.00   sec  35.9 MBytes   301 Mbits/sec
[ 42]   4.00-5.00   sec  34.6 MBytes   290 Mbits/sec
[ 44]   4.00-5.00   sec  36.4 MBytes   305 Mbits/sec
[SUM]   4.00-5.00   sec   708 MBytes  5.94 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   5.00-6.00   sec  36.0 MBytes   302 Mbits/sec
[  8]   5.00-6.00   sec  36.0 MBytes   302 Mbits/sec
[ 10]   5.00-6.00   sec  36.0 MBytes   302 Mbits/sec
[ 12]   5.00-6.00   sec  35.2 MBytes   295 Mbits/sec
[ 14]   5.00-6.00   sec  35.8 MBytes   300 Mbits/sec
[ 16]   5.00-6.00   sec  36.0 MBytes   302 Mbits/sec
[ 18]   5.00-6.00   sec  35.8 MBytes   300 Mbits/sec
[ 20]   5.00-6.00   sec  35.9 MBytes   301 Mbits/sec
[ 22]   5.00-6.00   sec  35.5 MBytes   298 Mbits/sec
[ 24]   5.00-6.00   sec  35.8 MBytes   300 Mbits/sec
[ 26]   5.00-6.00   sec  34.7 MBytes   291 Mbits/sec
[ 28]   5.00-6.00   sec  35.9 MBytes   301 Mbits/sec
[ 30]   5.00-6.00   sec  35.9 MBytes   301 Mbits/sec
[ 32]   5.00-6.00   sec  34.9 MBytes   293 Mbits/sec
[ 34]   5.00-6.00   sec  35.0 MBytes   293 Mbits/sec
[ 36]   5.00-6.00   sec  35.7 MBytes   299 Mbits/sec
[ 38]   5.00-6.00   sec  35.9 MBytes   301 Mbits/sec
[ 40]   5.00-6.00   sec  36.0 MBytes   302 Mbits/sec
[ 42]   5.00-6.00   sec  35.7 MBytes   299 Mbits/sec
[ 44]   5.00-6.00   sec  35.9 MBytes   301 Mbits/sec
[SUM]   5.00-6.00   sec   713 MBytes  5.98 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   6.00-7.00   sec  36.5 MBytes   306 Mbits/sec
[  8]   6.00-7.00   sec  36.6 MBytes   307 Mbits/sec
[ 10]   6.00-7.00   sec  35.3 MBytes   296 Mbits/sec
[ 12]   6.00-7.00   sec  35.9 MBytes   301 Mbits/sec
[ 14]   6.00-7.00   sec  35.9 MBytes   301 Mbits/sec
[ 16]   6.00-7.00   sec  34.1 MBytes   286 Mbits/sec
[ 18]   6.00-7.00   sec  34.6 MBytes   290 Mbits/sec
[ 20]   6.00-7.00   sec  35.9 MBytes   301 Mbits/sec
[ 22]   6.00-7.00   sec  35.7 MBytes   299 Mbits/sec
[ 24]   6.00-7.00   sec  35.9 MBytes   301 Mbits/sec
[ 26]   6.00-7.00   sec  34.6 MBytes   290 Mbits/sec
[ 28]   6.00-7.00   sec  36.0 MBytes   302 Mbits/sec
[ 30]   6.00-7.00   sec  35.9 MBytes   301 Mbits/sec
[ 32]   6.00-7.00   sec  35.4 MBytes   297 Mbits/sec
[ 34]   6.00-7.00   sec  35.4 MBytes   297 Mbits/sec
[ 36]   6.00-7.00   sec  35.9 MBytes   301 Mbits/sec
[ 38]   6.00-7.00   sec  35.9 MBytes   301 Mbits/sec
[ 40]   6.00-7.00   sec  36.0 MBytes   302 Mbits/sec
[ 42]   6.00-7.00   sec  35.8 MBytes   301 Mbits/sec
[ 44]   6.00-7.00   sec  36.0 MBytes   302 Mbits/sec
[SUM]   6.00-7.00   sec   713 MBytes  5.98 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   7.00-8.00   sec  37.0 MBytes   310 Mbits/sec
[  8]   7.00-8.00   sec  37.1 MBytes   311 Mbits/sec
[ 10]   7.00-8.00   sec  34.0 MBytes   285 Mbits/sec
[ 12]   7.00-8.00   sec  36.0 MBytes   302 Mbits/sec
[ 14]   7.00-8.00   sec  35.9 MBytes   301 Mbits/sec
[ 16]   7.00-8.00   sec  34.9 MBytes   293 Mbits/sec
[ 18]   7.00-8.00   sec  34.7 MBytes   291 Mbits/sec
[ 20]   7.00-8.00   sec  35.9 MBytes   301 Mbits/sec
[ 22]   7.00-8.00   sec  36.0 MBytes   302 Mbits/sec
[ 24]   7.00-8.00   sec  36.5 MBytes   306 Mbits/sec
[ 26]   7.00-8.00   sec  36.0 MBytes   302 Mbits/sec
[ 28]   7.00-8.00   sec  36.0 MBytes   302 Mbits/sec
[ 30]   7.00-8.00   sec  36.0 MBytes   302 Mbits/sec
[ 32]   7.00-8.00   sec  36.0 MBytes   302 Mbits/sec
[ 34]   7.00-8.00   sec  36.0 MBytes   302 Mbits/sec
[ 36]   7.00-8.00   sec  35.8 MBytes   301 Mbits/sec
[ 38]   7.00-8.00   sec  35.9 MBytes   301 Mbits/sec
[ 40]   7.00-8.00   sec  36.5 MBytes   306 Mbits/sec
[ 42]   7.00-8.00   sec  36.0 MBytes   302 Mbits/sec
[ 44]   7.00-8.00   sec  35.9 MBytes   301 Mbits/sec
[SUM]   7.00-8.00   sec   718 MBytes  6.02 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   8.00-9.00   sec  36.7 MBytes   308 Mbits/sec
[  8]   8.00-9.00   sec  36.7 MBytes   308 Mbits/sec
[ 10]   8.00-9.00   sec  35.4 MBytes   297 Mbits/sec
[ 12]   8.00-9.00   sec  35.8 MBytes   301 Mbits/sec
[ 14]   8.00-9.00   sec  34.0 MBytes   286 Mbits/sec
[ 16]   8.00-9.00   sec  35.4 MBytes   297 Mbits/sec
[ 18]   8.00-9.00   sec  35.3 MBytes   296 Mbits/sec
[ 20]   8.00-9.00   sec  34.3 MBytes   288 Mbits/sec
[ 22]   8.00-9.00   sec  35.7 MBytes   300 Mbits/sec
[ 24]   8.00-9.00   sec  36.4 MBytes   305 Mbits/sec
[ 26]   8.00-9.00   sec  36.0 MBytes   302 Mbits/sec
[ 28]   8.00-9.00   sec  35.2 MBytes   295 Mbits/sec
[ 30]   8.00-9.00   sec  34.2 MBytes   287 Mbits/sec
[ 32]   8.00-9.00   sec  36.0 MBytes   302 Mbits/sec
[ 34]   8.00-9.00   sec  36.0 MBytes   302 Mbits/sec
[ 36]   8.00-9.00   sec  33.9 MBytes   285 Mbits/sec
[ 38]   8.00-9.00   sec  34.8 MBytes   292 Mbits/sec
[ 40]   8.00-9.00   sec  36.5 MBytes   306 Mbits/sec
[ 42]   8.00-9.00   sec  35.6 MBytes   299 Mbits/sec
[ 44]   8.00-9.00   sec  36.3 MBytes   304 Mbits/sec
[SUM]   8.00-9.00   sec   710 MBytes  5.96 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   9.00-10.00  sec  36.7 MBytes   307 Mbits/sec
[  8]   9.00-10.00  sec  36.4 MBytes   306 Mbits/sec
[ 10]   9.00-10.00  sec  36.0 MBytes   302 Mbits/sec
[ 12]   9.00-10.00  sec  34.7 MBytes   291 Mbits/sec
[ 14]   9.00-10.00  sec  35.0 MBytes   294 Mbits/sec
[ 16]   9.00-10.00  sec  35.9 MBytes   301 Mbits/sec
[ 18]   9.00-10.00  sec  36.0 MBytes   302 Mbits/sec
[ 20]   9.00-10.00  sec  35.2 MBytes   295 Mbits/sec
[ 22]   9.00-10.00  sec  35.3 MBytes   296 Mbits/sec
[ 24]   9.00-10.00  sec  36.8 MBytes   308 Mbits/sec
[ 26]   9.00-10.00  sec  36.0 MBytes   302 Mbits/sec
[ 28]   9.00-10.00  sec  35.2 MBytes   295 Mbits/sec
[ 30]   9.00-10.00  sec  34.9 MBytes   293 Mbits/sec
[ 32]   9.00-10.00  sec  36.0 MBytes   302 Mbits/sec
[ 34]   9.00-10.00  sec  36.0 MBytes   302 Mbits/sec
[ 36]   9.00-10.00  sec  35.2 MBytes   295 Mbits/sec
[ 38]   9.00-10.00  sec  35.3 MBytes   296 Mbits/sec
[ 40]   9.00-10.00  sec  36.9 MBytes   310 Mbits/sec
[ 42]   9.00-10.00  sec  35.3 MBytes   296 Mbits/sec
[ 44]   9.00-10.00  sec  36.7 MBytes   308 Mbits/sec
[SUM]   9.00-10.00  sec   715 MBytes  6.00 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]  10.00-10.09  sec  3.00 MBytes   280 Mbits/sec
[  8]  10.00-10.09  sec  3.00 MBytes   280 Mbits/sec
[ 10]  10.00-10.09  sec  3.00 MBytes   280 Mbits/sec
[ 12]  10.00-10.09  sec  3.41 MBytes   319 Mbits/sec
[ 14]  10.00-10.09  sec  3.26 MBytes   305 Mbits/sec
[ 16]  10.00-10.09  sec  3.00 MBytes   280 Mbits/sec
[ 18]  10.00-10.09  sec  3.00 MBytes   280 Mbits/sec
[ 20]  10.00-10.09  sec  3.30 MBytes   308 Mbits/sec
[ 22]  10.00-10.09  sec  3.29 MBytes   307 Mbits/sec
[ 24]  10.00-10.09  sec  3.74 MBytes   349 Mbits/sec
[ 26]  10.00-10.09  sec  3.00 MBytes   280 Mbits/sec
[ 28]  10.00-10.09  sec  3.12 MBytes   291 Mbits/sec
[ 30]  10.00-10.09  sec  3.65 MBytes   341 Mbits/sec
[ 32]  10.00-10.09  sec  3.00 MBytes   280 Mbits/sec
[ 34]  10.00-10.09  sec  3.00 MBytes   280 Mbits/sec
[ 36]  10.00-10.09  sec  3.07 MBytes   287 Mbits/sec
[ 38]  10.00-10.09  sec  3.27 MBytes   306 Mbits/sec
[ 40]  10.00-10.09  sec  3.32 MBytes   311 Mbits/sec
[ 42]  10.00-10.09  sec  3.34 MBytes   312 Mbits/sec
[ 44]  10.00-10.09  sec  3.47 MBytes   325 Mbits/sec
[SUM]  10.00-10.09  sec  64.2 MBytes  6.00 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.09  sec   325 MBytes   270 Mbits/sec                  receiver
[  8]   0.00-10.09  sec   327 MBytes   272 Mbits/sec                  receiver
[ 10]   0.00-10.09  sec   311 MBytes   258 Mbits/sec                  receiver
[ 12]   0.00-10.09  sec   312 MBytes   259 Mbits/sec                  receiver
[ 14]   0.00-10.09  sec   309 MBytes   257 Mbits/sec                  receiver
[ 16]   0.00-10.09  sec   308 MBytes   256 Mbits/sec                  receiver
[ 18]   0.00-10.09  sec   311 MBytes   259 Mbits/sec                  receiver
[ 20]   0.00-10.09  sec   310 MBytes   257 Mbits/sec                  receiver
[ 22]   0.00-10.09  sec   312 MBytes   260 Mbits/sec                  receiver
[ 24]   0.00-10.09  sec   318 MBytes   265 Mbits/sec                  receiver
[ 26]   0.00-10.09  sec   317 MBytes   264 Mbits/sec                  receiver
[ 28]   0.00-10.09  sec   315 MBytes   262 Mbits/sec                  receiver
[ 30]   0.00-10.09  sec   312 MBytes   259 Mbits/sec                  receiver
[ 32]   0.00-10.09  sec   314 MBytes   261 Mbits/sec                  receiver
[ 34]   0.00-10.09  sec   315 MBytes   262 Mbits/sec                  receiver
[ 36]   0.00-10.09  sec   307 MBytes   255 Mbits/sec                  receiver
[ 38]   0.00-10.09  sec   314 MBytes   261 Mbits/sec                  receiver
[ 40]   0.00-10.09  sec   317 MBytes   264 Mbits/sec                  receiver
[ 42]   0.00-10.09  sec   314 MBytes   261 Mbits/sec                  receiver
[ 44]   0.00-10.09  sec   320 MBytes   266 Mbits/sec                  receiver
[SUM]   0.00-10.09  sec  6.14 GBytes  5.23 Gbits/sec                  receiver
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

Client

[SUM]   0.00-10.01  sec  6.16 GBytes  5.28 Gbits/sec                  sender
[SUM]   0.00-10.09  sec  6.14 GBytes  5.23 Gbits/sec                  receiver
Test log 
iperf3 -P 20 -c xxx.xxx.xxx.xxx
Connecting to host xxx.xxx.xxx.xxx, port 5201
[  5] local xxx.xxx.xxx.xxx port 51049 connected to xxx.xxx.xxx.xxx port 5201
[  7] local xxx.xxx.xxx.xxx port 51050 connected to xxx.xxx.xxx.xxx port 5201
[  9] local xxx.xxx.xxx.xxx port 51051 connected to xxx.xxx.xxx.xxx port 5201
[ 11] local xxx.xxx.xxx.xxx port 51052 connected to xxx.xxx.xxx.xxx port 5201
[ 13] local xxx.xxx.xxx.xxx port 51053 connected to xxx.xxx.xxx.xxx port 5201
[ 15] local xxx.xxx.xxx.xxx port 51054 connected to xxx.xxx.xxx.xxx port 5201
[ 17] local xxx.xxx.xxx.xxx port 51055 connected to xxx.xxx.xxx.xxx port 5201
[ 19] local xxx.xxx.xxx.xxx port 51056 connected to xxx.xxx.xxx.xxx port 5201
[ 21] local xxx.xxx.xxx.xxx port 51057 connected to xxx.xxx.xxx.xxx port 5201
[ 23] local xxx.xxx.xxx.xxx port 51058 connected to xxx.xxx.xxx.xxx port 5201
[ 25] local xxx.xxx.xxx.xxx port 51059 connected to xxx.xxx.xxx.xxx port 5201
[ 27] local xxx.xxx.xxx.xxx port 51060 connected to xxx.xxx.xxx.xxx port 5201
[ 29] local xxx.xxx.xxx.xxx port 51061 connected to xxx.xxx.xxx.xxx port 5201
[ 31] local xxx.xxx.xxx.xxx port 51062 connected to xxx.xxx.xxx.xxx port 5201
[ 33] local xxx.xxx.xxx.xxx port 51065 connected to xxx.xxx.xxx.xxx port 5201
[ 35] local xxx.xxx.xxx.xxx port 51066 connected to xxx.xxx.xxx.xxx port 5201
[ 37] local xxx.xxx.xxx.xxx port 51067 connected to xxx.xxx.xxx.xxx port 5201
[ 39] local xxx.xxx.xxx.xxx port 51068 connected to xxx.xxx.xxx.xxx port 5201
[ 41] local xxx.xxx.xxx.xxx port 51069 connected to xxx.xxx.xxx.xxx port 5201
[ 43] local xxx.xxx.xxx.xxx port 51070 connected to xxx.xxx.xxx.xxx port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  4.75 MBytes  39.7 Mbits/sec
[  7]   0.00-1.00   sec  5.62 MBytes  47.0 Mbits/sec
[  9]   0.00-1.00   sec  1.88 MBytes  15.7 Mbits/sec
[ 11]   0.00-1.00   sec  2.00 MBytes  16.7 Mbits/sec
[ 13]   0.00-1.00   sec  1.62 MBytes  13.6 Mbits/sec
[ 15]   0.00-1.00   sec  1.62 MBytes  13.6 Mbits/sec
[ 17]   0.00-1.00   sec  2.00 MBytes  16.7 Mbits/sec
[ 19]   0.00-1.00   sec  1.62 MBytes  13.6 Mbits/sec
[ 21]   0.00-1.00   sec  2.12 MBytes  17.8 Mbits/sec
[ 23]   0.00-1.00   sec  2.50 MBytes  20.9 Mbits/sec
[ 25]   0.00-1.00   sec  3.62 MBytes  30.3 Mbits/sec
[ 27]   0.00-1.00   sec  3.25 MBytes  27.2 Mbits/sec
[ 29]   0.00-1.00   sec  2.50 MBytes  20.9 Mbits/sec
[ 31]   0.00-1.00   sec  2.25 MBytes  18.8 Mbits/sec
[ 33]   0.00-1.00   sec  3.12 MBytes  26.1 Mbits/sec
[ 35]   0.00-1.00   sec  1.75 MBytes  14.6 Mbits/sec
[ 37]   0.00-1.00   sec  2.50 MBytes  20.9 Mbits/sec
[ 39]   0.00-1.00   sec  2.38 MBytes  19.9 Mbits/sec
[ 41]   0.00-1.00   sec  2.50 MBytes  20.9 Mbits/sec
[ 43]   0.00-1.00   sec  4.25 MBytes  35.5 Mbits/sec
[SUM]   0.00-1.00   sec  53.9 MBytes   450 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   1.00-2.00   sec  30.5 MBytes   256 Mbits/sec
[  7]   1.00-2.00   sec  31.2 MBytes   262 Mbits/sec
[  9]   1.00-2.00   sec  24.9 MBytes   209 Mbits/sec
[ 11]   1.00-2.00   sec  26.9 MBytes   225 Mbits/sec
[ 13]   1.00-2.00   sec  26.9 MBytes   225 Mbits/sec
[ 15]   1.00-2.00   sec  23.2 MBytes   195 Mbits/sec
[ 17]   1.00-2.00   sec  25.8 MBytes   216 Mbits/sec
[ 19]   1.00-2.00   sec  26.4 MBytes   221 Mbits/sec
[ 21]   1.00-2.00   sec  26.9 MBytes   225 Mbits/sec
[ 23]   1.00-2.00   sec  26.6 MBytes   223 Mbits/sec
[ 25]   1.00-2.00   sec  29.6 MBytes   249 Mbits/sec
[ 27]   1.00-2.00   sec  29.0 MBytes   243 Mbits/sec
[ 29]   1.00-2.00   sec  27.9 MBytes   234 Mbits/sec
[ 31]   1.00-2.00   sec  28.0 MBytes   235 Mbits/sec
[ 33]   1.00-2.00   sec  28.4 MBytes   238 Mbits/sec
[ 35]   1.00-2.00   sec  25.0 MBytes   210 Mbits/sec
[ 37]   1.00-2.00   sec  28.9 MBytes   242 Mbits/sec
[ 39]   1.00-2.00   sec  25.6 MBytes   215 Mbits/sec
[ 41]   1.00-2.00   sec  28.0 MBytes   235 Mbits/sec
[ 43]   1.00-2.00   sec  28.2 MBytes   237 Mbits/sec
[SUM]   1.00-2.00   sec   548 MBytes  4.60 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   2.00-3.00   sec  35.9 MBytes   301 Mbits/sec
[  7]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[  9]   2.00-3.00   sec  35.9 MBytes   301 Mbits/sec
[ 11]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 13]   2.00-3.00   sec  34.9 MBytes   293 Mbits/sec
[ 15]   2.00-3.00   sec  35.9 MBytes   301 Mbits/sec
[ 17]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 19]   2.00-3.00   sec  35.4 MBytes   297 Mbits/sec
[ 21]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 23]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 25]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 27]   2.00-3.00   sec  35.8 MBytes   300 Mbits/sec
[ 29]   2.00-3.00   sec  35.0 MBytes   294 Mbits/sec
[ 31]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 33]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 35]   2.00-3.00   sec  34.5 MBytes   290 Mbits/sec
[ 37]   2.00-3.00   sec  35.2 MBytes   296 Mbits/sec
[ 39]   2.00-3.00   sec  35.9 MBytes   301 Mbits/sec
[ 41]   2.00-3.00   sec  36.0 MBytes   302 Mbits/sec
[ 43]   2.00-3.00   sec  35.8 MBytes   300 Mbits/sec
[SUM]   2.00-3.00   sec   714 MBytes  5.99 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   3.00-4.00   sec  36.0 MBytes   302 Mbits/sec
[  7]   3.00-4.00   sec  35.9 MBytes   301 Mbits/sec
[  9]   3.00-4.00   sec  36.0 MBytes   302 Mbits/sec
[ 11]   3.00-4.00   sec  35.8 MBytes   300 Mbits/sec
[ 13]   3.00-4.00   sec  34.4 MBytes   289 Mbits/sec
[ 15]   3.00-4.00   sec  36.0 MBytes   302 Mbits/sec
[ 17]   3.00-4.00   sec  35.9 MBytes   301 Mbits/sec
[ 19]   3.00-4.00   sec  34.5 MBytes   290 Mbits/sec
[ 21]   3.00-4.00   sec  35.0 MBytes   294 Mbits/sec
[ 23]   3.00-4.00   sec  35.9 MBytes   301 Mbits/sec
[ 25]   3.00-4.00   sec  36.0 MBytes   302 Mbits/sec
[ 27]   3.00-4.00   sec  34.5 MBytes   290 Mbits/sec
[ 29]   3.00-4.00   sec  34.4 MBytes   289 Mbits/sec
[ 31]   3.00-4.00   sec  35.6 MBytes   299 Mbits/sec
[ 33]   3.00-4.00   sec  35.8 MBytes   300 Mbits/sec
[ 35]   3.00-4.00   sec  34.4 MBytes   289 Mbits/sec
[ 37]   3.00-4.00   sec  34.5 MBytes   290 Mbits/sec
[ 39]   3.00-4.00   sec  35.8 MBytes   300 Mbits/sec
[ 41]   3.00-4.00   sec  34.8 MBytes   292 Mbits/sec
[ 43]   3.00-4.00   sec  35.8 MBytes   300 Mbits/sec
[SUM]   3.00-4.00   sec   707 MBytes  5.94 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   4.00-5.00   sec  36.0 MBytes   302 Mbits/sec
[  7]   4.00-5.00   sec  36.0 MBytes   302 Mbits/sec
[  9]   4.00-5.00   sec  35.9 MBytes   301 Mbits/sec
[ 11]   4.00-5.00   sec  34.0 MBytes   285 Mbits/sec
[ 13]   4.00-5.00   sec  35.5 MBytes   298 Mbits/sec
[ 15]   4.00-5.00   sec  35.9 MBytes   301 Mbits/sec
[ 17]   4.00-5.00   sec  35.9 MBytes   301 Mbits/sec
[ 19]   4.00-5.00   sec  35.0 MBytes   294 Mbits/sec
[ 21]   4.00-5.00   sec  34.9 MBytes   293 Mbits/sec
[ 23]   4.00-5.00   sec  36.0 MBytes   302 Mbits/sec
[ 25]   4.00-5.00   sec  35.8 MBytes   300 Mbits/sec
[ 27]   4.00-5.00   sec  34.9 MBytes   293 Mbits/sec
[ 29]   4.00-5.00   sec  35.2 MBytes   296 Mbits/sec
[ 31]   4.00-5.00   sec  34.9 MBytes   293 Mbits/sec
[ 33]   4.00-5.00   sec  34.8 MBytes   291 Mbits/sec
[ 35]   4.00-5.00   sec  35.5 MBytes   298 Mbits/sec
[ 37]   4.00-5.00   sec  35.1 MBytes   295 Mbits/sec
[ 39]   4.00-5.00   sec  35.9 MBytes   301 Mbits/sec
[ 41]   4.00-5.00   sec  34.6 MBytes   290 Mbits/sec
[ 43]   4.00-5.00   sec  35.9 MBytes   301 Mbits/sec
[SUM]   4.00-5.00   sec   708 MBytes  5.93 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   5.00-6.01   sec  36.0 MBytes   301 Mbits/sec
[  7]   5.00-6.01   sec  36.4 MBytes   304 Mbits/sec
[  9]   5.00-6.01   sec  36.0 MBytes   301 Mbits/sec
[ 11]   5.00-6.01   sec  35.2 MBytes   295 Mbits/sec
[ 13]   5.00-6.01   sec  35.9 MBytes   300 Mbits/sec
[ 15]   5.00-6.01   sec  36.0 MBytes   301 Mbits/sec
[ 17]   5.00-6.01   sec  35.8 MBytes   299 Mbits/sec
[ 19]   5.00-6.01   sec  35.9 MBytes   300 Mbits/sec
[ 21]   5.00-6.01   sec  35.5 MBytes   297 Mbits/sec
[ 23]   5.00-6.01   sec  35.8 MBytes   299 Mbits/sec
[ 25]   5.00-6.01   sec  35.4 MBytes   296 Mbits/sec
[ 27]   5.00-6.01   sec  35.8 MBytes   299 Mbits/sec
[ 29]   5.00-6.01   sec  35.9 MBytes   300 Mbits/sec
[ 31]   5.00-6.01   sec  35.6 MBytes   298 Mbits/sec
[ 33]   5.00-6.01   sec  35.6 MBytes   298 Mbits/sec
[ 35]   5.00-6.01   sec  35.6 MBytes   298 Mbits/sec
[ 37]   5.00-6.01   sec  35.9 MBytes   300 Mbits/sec
[ 39]   5.00-6.01   sec  36.0 MBytes   301 Mbits/sec
[ 41]   5.00-6.01   sec  35.6 MBytes   298 Mbits/sec
[ 43]   5.00-6.01   sec  35.9 MBytes   300 Mbits/sec
[SUM]   5.00-6.01   sec   716 MBytes  5.98 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   6.01-7.00   sec  36.6 MBytes   308 Mbits/sec
[  7]   6.01-7.00   sec  36.5 MBytes   307 Mbits/sec
[  9]   6.01-7.00   sec  35.4 MBytes   298 Mbits/sec
[ 11]   6.01-7.00   sec  35.9 MBytes   302 Mbits/sec
[ 13]   6.01-7.00   sec  35.9 MBytes   302 Mbits/sec
[ 15]   6.01-7.00   sec  34.6 MBytes   292 Mbits/sec
[ 17]   6.01-7.00   sec  35.0 MBytes   295 Mbits/sec
[ 19]   6.01-7.00   sec  35.9 MBytes   302 Mbits/sec
[ 21]   6.01-7.00   sec  35.5 MBytes   299 Mbits/sec
[ 23]   6.01-7.00   sec  36.1 MBytes   304 Mbits/sec
[ 25]   6.01-7.00   sec  33.8 MBytes   284 Mbits/sec
[ 27]   6.01-7.00   sec  36.0 MBytes   303 Mbits/sec
[ 29]   6.01-7.00   sec  36.0 MBytes   303 Mbits/sec
[ 31]   6.01-7.00   sec  34.6 MBytes   292 Mbits/sec
[ 33]   6.01-7.00   sec  34.6 MBytes   292 Mbits/sec
[ 35]   6.01-7.00   sec  35.9 MBytes   302 Mbits/sec
[ 37]   6.01-7.00   sec  35.9 MBytes   302 Mbits/sec
[ 39]   6.01-7.00   sec  36.0 MBytes   303 Mbits/sec
[ 41]   6.01-7.00   sec  35.9 MBytes   302 Mbits/sec
[ 43]   6.01-7.00   sec  36.0 MBytes   303 Mbits/sec
[SUM]   6.01-7.00   sec   712 MBytes  6.00 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   7.00-8.01   sec  37.0 MBytes   309 Mbits/sec
[  7]   7.00-8.01   sec  37.1 MBytes   310 Mbits/sec
[  9]   7.00-8.01   sec  34.8 MBytes   290 Mbits/sec
[ 11]   7.00-8.01   sec  35.9 MBytes   300 Mbits/sec
[ 13]   7.00-8.01   sec  35.9 MBytes   300 Mbits/sec
[ 15]   7.00-8.01   sec  34.4 MBytes   287 Mbits/sec
[ 17]   7.00-8.01   sec  34.5 MBytes   288 Mbits/sec
[ 19]   7.00-8.01   sec  35.9 MBytes   300 Mbits/sec
[ 21]   7.00-8.01   sec  35.9 MBytes   300 Mbits/sec
[ 23]   7.00-8.01   sec  36.5 MBytes   305 Mbits/sec
[ 25]   7.00-8.01   sec  36.0 MBytes   301 Mbits/sec
[ 27]   7.00-8.01   sec  35.9 MBytes   300 Mbits/sec
[ 29]   7.00-8.01   sec  35.9 MBytes   300 Mbits/sec
[ 31]   7.00-8.01   sec  36.0 MBytes   301 Mbits/sec
[ 33]   7.00-8.01   sec  36.0 MBytes   301 Mbits/sec
[ 35]   7.00-8.01   sec  35.9 MBytes   300 Mbits/sec
[ 37]   7.00-8.01   sec  35.9 MBytes   300 Mbits/sec
[ 39]   7.00-8.01   sec  36.6 MBytes   306 Mbits/sec
[ 41]   7.00-8.01   sec  35.9 MBytes   300 Mbits/sec
[ 43]   7.00-8.01   sec  36.0 MBytes   301 Mbits/sec
[SUM]   7.00-8.01   sec   718 MBytes  6.00 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   8.01-9.01   sec  36.9 MBytes   309 Mbits/sec
[  7]   8.01-9.01   sec  36.8 MBytes   308 Mbits/sec
[  9]   8.01-9.01   sec  34.8 MBytes   292 Mbits/sec
[ 11]   8.01-9.01   sec  36.0 MBytes   302 Mbits/sec
[ 13]   8.01-9.01   sec  34.5 MBytes   289 Mbits/sec
[ 15]   8.01-9.01   sec  35.4 MBytes   297 Mbits/sec
[ 17]   8.01-9.01   sec  35.1 MBytes   295 Mbits/sec
[ 19]   8.01-9.01   sec  35.0 MBytes   294 Mbits/sec
[ 21]   8.01-9.01   sec  35.8 MBytes   300 Mbits/sec
[ 23]   8.01-9.01   sec  36.5 MBytes   306 Mbits/sec
[ 25]   8.01-9.01   sec  35.9 MBytes   301 Mbits/sec
[ 27]   8.01-9.01   sec  35.9 MBytes   301 Mbits/sec
[ 29]   8.01-9.01   sec  34.8 MBytes   292 Mbits/sec
[ 31]   8.01-9.01   sec  36.0 MBytes   302 Mbits/sec
[ 33]   8.01-9.01   sec  36.0 MBytes   302 Mbits/sec
[ 35]   8.01-9.01   sec  34.6 MBytes   290 Mbits/sec
[ 37]   8.01-9.01   sec  35.6 MBytes   299 Mbits/sec
[ 39]   8.01-9.01   sec  36.9 MBytes   309 Mbits/sec
[ 41]   8.01-9.01   sec  35.6 MBytes   299 Mbits/sec
[ 43]   8.01-9.01   sec  36.6 MBytes   307 Mbits/sec
[SUM]   8.01-9.01   sec   714 MBytes  5.99 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[  5]   9.01-10.01  sec  36.2 MBytes   304 Mbits/sec
[  7]   9.01-10.01  sec  36.0 MBytes   302 Mbits/sec
[  9]   9.01-10.01  sec  35.9 MBytes   301 Mbits/sec
[ 11]   9.01-10.01  sec  35.0 MBytes   293 Mbits/sec
[ 13]   9.01-10.01  sec  34.8 MBytes   291 Mbits/sec
[ 15]   9.01-10.01  sec  35.9 MBytes   301 Mbits/sec
[ 17]   9.01-10.01  sec  35.9 MBytes   301 Mbits/sec
[ 19]   9.01-10.01  sec  34.9 MBytes   292 Mbits/sec
[ 21]   9.01-10.01  sec  35.6 MBytes   299 Mbits/sec
[ 23]   9.01-10.01  sec  37.2 MBytes   312 Mbits/sec
[ 25]   9.01-10.01  sec  36.0 MBytes   302 Mbits/sec
[ 27]   9.01-10.01  sec  34.6 MBytes   290 Mbits/sec
[ 29]   9.01-10.01  sec  35.1 MBytes   295 Mbits/sec
[ 31]   9.01-10.01  sec  35.9 MBytes   301 Mbits/sec
[ 33]   9.01-10.01  sec  35.9 MBytes   301 Mbits/sec
[ 35]   9.01-10.01  sec  34.6 MBytes   290 Mbits/sec
[ 37]   9.01-10.01  sec  34.8 MBytes   291 Mbits/sec
[ 39]   9.01-10.01  sec  36.8 MBytes   308 Mbits/sec
[ 41]   9.01-10.01  sec  35.6 MBytes   299 Mbits/sec
[ 43]   9.01-10.01  sec  36.8 MBytes   308 Mbits/sec
[SUM]   9.01-10.01  sec   713 MBytes  5.98 Gbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-10.01  sec   326 MBytes   273 Mbits/sec                  sender
[  5]   0.00-10.09  sec   325 MBytes   270 Mbits/sec                  receiver
[  7]   0.00-10.01  sec   328 MBytes   275 Mbits/sec                  sender
[  7]   0.00-10.09  sec   327 MBytes   272 Mbits/sec                  receiver
[  9]   0.00-10.01  sec   311 MBytes   261 Mbits/sec                  sender
[  9]   0.00-10.09  sec   311 MBytes   258 Mbits/sec                  receiver
[ 11]   0.00-10.01  sec   313 MBytes   262 Mbits/sec                  sender
[ 11]   0.00-10.09  sec   312 MBytes   259 Mbits/sec                  receiver
[ 13]   0.00-10.01  sec   310 MBytes   260 Mbits/sec                  sender
[ 13]   0.00-10.09  sec   309 MBytes   257 Mbits/sec                  receiver
[ 15]   0.00-10.01  sec   309 MBytes   259 Mbits/sec                  sender
[ 15]   0.00-10.09  sec   308 MBytes   256 Mbits/sec                  receiver
[ 17]   0.00-10.01  sec   312 MBytes   261 Mbits/sec                  sender
[ 17]   0.00-10.09  sec   311 MBytes   259 Mbits/sec                  receiver
[ 19]   0.00-10.01  sec   310 MBytes   260 Mbits/sec                  sender
[ 19]   0.00-10.09  sec   310 MBytes   257 Mbits/sec                  receiver
[ 21]   0.00-10.01  sec   313 MBytes   263 Mbits/sec                  sender
[ 21]   0.00-10.09  sec   312 MBytes   260 Mbits/sec                  receiver
[ 23]   0.00-10.01  sec   319 MBytes   268 Mbits/sec                  sender
[ 23]   0.00-10.09  sec   318 MBytes   265 Mbits/sec                  receiver
[ 25]   0.00-10.01  sec   318 MBytes   267 Mbits/sec                  sender
[ 25]   0.00-10.09  sec   317 MBytes   264 Mbits/sec                  receiver
[ 27]   0.00-10.01  sec   316 MBytes   265 Mbits/sec                  sender
[ 27]   0.00-10.09  sec   315 MBytes   262 Mbits/sec                  receiver
[ 29]   0.00-10.01  sec   313 MBytes   262 Mbits/sec                  sender
[ 29]   0.00-10.09  sec   312 MBytes   259 Mbits/sec                  receiver
[ 31]   0.00-10.01  sec   315 MBytes   264 Mbits/sec                  sender
[ 31]   0.00-10.09  sec   314 MBytes   261 Mbits/sec                  receiver
[ 33]   0.00-10.01  sec   316 MBytes   265 Mbits/sec                  sender
[ 33]   0.00-10.09  sec   315 MBytes   262 Mbits/sec                  receiver
[ 35]   0.00-10.01  sec   308 MBytes   258 Mbits/sec                  sender
[ 35]   0.00-10.09  sec   307 MBytes   255 Mbits/sec                  receiver
[ 37]   0.00-10.01  sec   314 MBytes   263 Mbits/sec                  sender
[ 37]   0.00-10.09  sec   314 MBytes   261 Mbits/sec                  receiver
[ 39]   0.00-10.01  sec   318 MBytes   266 Mbits/sec                  sender
[ 39]   0.00-10.09  sec   317 MBytes   264 Mbits/sec                  receiver
[ 41]   0.00-10.01  sec   314 MBytes   264 Mbits/sec                  sender
[ 41]   0.00-10.09  sec   314 MBytes   261 Mbits/sec                  receiver
[ 43]   0.00-10.01  sec   321 MBytes   269 Mbits/sec                  sender
[ 43]   0.00-10.09  sec   320 MBytes   266 Mbits/sec                  receiver
[SUM]   0.00-10.01  sec  6.16 GBytes  5.28 Gbits/sec                  sender
[SUM]   0.00-10.09  sec  6.14 GBytes  5.23 Gbits/sec                  receiver

iperf Done.

@kvz
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kvz commented Jan 8, 2024 •
edited

dd if=/dev/zero bs=1M count=10000 | cat > /dev/null

This is primarily a test of CPU and memory throughput rather than disk performance, as it involves generating data in memory and then discarding it without involving the disk subsystem.

To benchmark disk performance, you would typically write the data to a disk device or a file on a filesystem, rather than piping it to /dev/null. For example, replacing /dev/null with a path to a file on the disk you want to test would provide a measure of disk write performance. However, be cautious with such tests, as they can write a large amount of data and potentially impact other operations or data on the disk.

@pavelbinar
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@kvz Thank you, I hope this is better, but the point is still the same:

Client

Write

dd if=/dev/zero of=testfile bs=1G count=10 oflag=direct

10+0 records in
10+0 records out
10737418240 bytes transferred in 2.320358 secs (4627483449 bytes/sec)

Read

dd if=testfile of=/dev/null bs=1G

10+0 records in
10+0 records out
10737418240 bytes transferred in 1.761896 secs (6094240659 bytes/sec)

Server

Write

dd if=/dev/zero of=testfile bs=1G count=10 oflag=direct
10+0 records in
10+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 3.29817 s, 3.3 GB/s

Read

dd if=testfile of=/dev/null bs=1G
10+0 records in
10+0 records out
10737418240 bytes (11 GB, 10 GiB) copied, 6.757 s, 1.6 GB/s

@Acconut
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Acconut commented Jan 9, 2024

Upload performance is always a bit tricky to debug. How fast are the uploads if the server and client are running on the same machine? If that's fast, then we can rule out any issue with the software itself.

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