I just tried to update to the newest version:

bash-3.2$ git pull
remote: Enumerating objects: 250, done.
remote: Counting objects: 100% (250/250), done.
remote: Compressing objects: 100% (134/134), done.
remote: Total 250 (delta 177), reused 180 (delta 107), pack-reused 0
Receiving objects: 100% (250/250), 446.88 KiB | 16.55 MiB/s, done.
Resolving deltas: 100% (177/177), completed with 15 local objects.
From https://github.com/Zoxc/crusader
   c2b50ad..bba1768  master     -> origin/master
 * [new branch]      test       -> origin/test
 * [new tag]         v0.0.7-testing -> v0.0.7-testing
Updating c2b50ad..bba1768
Fast-forward
 android/Cargo.lock                                        |  22 +++---
 android/Cargo.toml                                        |   3 +-
 android/app/src/main/java/zoxc/crusader/MainActivity.java |  12 ++--
 android/src/lib.rs                                        |   2 +-
 data/v0.crr                                               | Bin 0 -> 171552 bytes
 data/v1.crr                                               | Bin 0 -> 119261 bytes
 data/v2.crr                                               | Bin 0 -> 325182 bytes
 src/Cargo.lock                                            |  28 ++++----
 src/crusader-gui-lib/src/lib.rs                           |  78 ++++++++++++++------
 src/crusader-lib/Cargo.toml                               |   3 +-
 src/crusader-lib/src/file_format.rs                       |  23 +++---
 src/crusader-lib/src/plot.rs                              | 124 +++++++++++++++++++-------------
 src/crusader-lib/src/protocol.rs                          |  26 +++++--
 src/crusader-lib/src/serve.rs                             | 496 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------
 src/crusader-lib/src/test.rs                              | 346 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------
 src/crusader/Cargo.toml                                   |   2 +-
 16 files changed, 830 insertions(+), 335 deletions(-)
 create mode 100644 data/v0.crr
 create mode 100644 data/v1.crr
 create mode 100644 data/v2.crr
Press any key to continue...

bash-3.2$ cargo build --release
    Updating git repository `https://github.com/Zoxc/winit`
    Updating crates.io index
    Updating git repository `https://github.com/Zoxc/egui.git`
  Downloaded socket2 v0.4.6
  Downloaded 1 crate (44.5 KB) in 0.56s
   Compiling socket2 v0.4.6
   Compiling emath v0.19.0 (https://github.com/Zoxc/egui.git?branch=crusader#1bd048c7)
   Compiling winit v0.27.2 (https://github.com/Zoxc/winit?branch=crusader#75c0ae47)
   Compiling tokio v1.20.1
   Compiling epaint v0.19.0 (https://github.com/Zoxc/egui.git?branch=crusader#1bd048c7)
   Compiling glutin v0.29.1
   Compiling egui v0.19.0 (https://github.com/Zoxc/egui.git?branch=crusader#1bd048c7)
   Compiling egui_glow v0.19.0 (https://github.com/Zoxc/egui.git?branch=crusader#1bd048c7)
   Compiling egui-winit v0.19.0 (https://github.com/Zoxc/egui.git?branch=crusader#1bd048c7)
   Compiling eframe v0.19.0 (https://github.com/Zoxc/egui.git?branch=crusader#1bd048c7)
   Compiling tokio-util v0.7.3
   Compiling crusader-lib v0.0.7 (/Users/Shared/space/data_local/moeller/PRIVATE/samba/privat/MOEWE/techno_kram/CODE/crusader/src/crusader-lib)
error[E0658]: use of unstable library feature 'bool_to_option'
   --> crusader-lib/src/serve.rs:199:73
    |
199 | ...                   (client.ip == ip_to_ipv6_mapped(addr.ip())).then_some(client)
    |                                                                   ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

error[E0658]: use of unstable library feature 'bool_to_option'
   --> crusader-lib/src/serve.rs:421:64
    |
421 |                     (ip_to_ipv6_mapped(src.ip()) == client.ip).then_some((client, ping))
    |                                                                ^^^^^^^^^
    |
    = note: see issue #80967 <https://github.com/rust-lang/rust/issues/80967> for more information

For more information about this error, try `rustc --explain E0658`.
error: could not compile `crusader-lib` due to 2 previous errors
warning: build failed, waiting for other jobs to finish...

macbook:~ user$ rustc --version
rustc 1.61.0 (fe5b13d68 2022-05-18)

I really wish crusader had a mode to show what staggered start looked like. Staring up a zillion flows at exactly the same time is not how things really work on the internet.

https://forum.mikrotik.com/viewtopic.php?p=951748

Relevant paper: http://caia.swin.edu.au/reports/140630A/CAIA-TR-140630A.pdf

Maybe the run time of the test could be made configurable? Often tests of longer durations like 0.5-10 minutes (so considerably longer than the typical 10-20 seconds for online speedtests) can be quite revealing and show e.g. things that cyclically affect throughput or latency (like an WiFi AP's channel scans say every 10 seconds).

oot@lqos:~# crusader test --stream-stagger 5 --streams 2 --load-duration 10 fd77::2 Connected to server [fd77::2]:35481 thread 'main' panicked at 'called Result::unwrap() on an Err value: "Unable to measure latency to server"', crusader-lib/src/test.rs:1304:10 stack backtrace: 0: 0x7fdf8f501ddd - 1: 0x7fdf8f53bc0c - 2: 0x7fdf8f4fc771 - 3: 0x7fdf8f503335 - 4: 0x7fdf8f503056 - 5: 0x7fdf8f5038c6 - 6: 0x7fdf8f5037b7 - 7: 0x7fdf8f502294 - 8: 0x7fdf8f5034e9 - 9: 0x7fdf8f388103 - 10: 0x7fdf8f3881f3 - 11: 0x7fdf8f3e6c8a - 12: 0x7fdf8f38e850 - 13: 0x7fdf8f392c63 - Aborted (core dumped)

The README now has a more expansive instructions for running the server and client. I'm not sure how to explain the green/blue colors of the latency plot.

I got the following error message when I ran the client without a server running at the other end.

A simple "No server seems to be running at <ip-address>" would suffice

?134 release % ./crusader test 192.168.253.128
thread 'main' panicked at 'called `Result::unwrap()` on an `Err` value: Os { code: 61, kind: ConnectionRefused, message: "Connection refused" }', crusader-lib/src/test.rs:1304:10
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
zsh: abort      ./crusader test 192.168.253.128

Running crusader test <host> on macOS 12.6.1 laptop on Wi-Fi to small odroid running crusader serve on Ethernet with Ubuntu 20.04.05. I got the following error messages the very first three times I ran it after compiling it (on macOS).

√ release % ./crusader test 192.168.253.128
Connected to server 192.168.253.128:35481
Latency to server 2.69 ms
Testing download...
Testing upload...
thread 'tokio-runtime-worker' panicked at 'unable to udp ping: Os { code: 55, kind: Uncategorized, message: "No buffer space available" }', crusader-lib/src/test.rs:1232:32
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
zsh: abort      ./crusader test 192.168.253.128
?134 release % ./crusader test 192.168.253.128
Connected to server 192.168.253.128:35481
Latency to server 2.62 ms
Testing download...
Testing upload...
Testing both download and upload...
thread 'tokio-runtime-worker' panicked at 'unable to udp ping: Os { code: 55, kind: Uncategorized, message: "No buffer space available" }', crusader-lib/src/test.rs:1232:32
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
zsh: abort      ./crusader test 192.168.253.128
?134 release % ./crusader test 192.168.253.128
Connected to server 192.168.253.128:35481
Latency to server 2.63 ms
Testing download...
Testing upload...
Testing both download and upload...
Writing data...
Saved raw data as data 2022.12.06 21-00-02.crr
Saved plot as plot 2022.12.06 21-00-02.png
√ release %

Server said...

llladmin@odroid:~/Documents/src/crusader/src/target/release$ ./crusader serve
Server running...
Serving 192.168.253.116:50773, version 3
Error from client 192.168.253.116:50773: Connection reset by peer (os error 104)
Serving 192.168.253.116:50859, version 3
Error from client 192.168.253.116:50859: Connection reset by peer (os error 104)
Serving 192.168.253.116:50929, version 3
Serving complete for 192.168.253.116:50929
^CServer aborting...

Plot (from third run) Not sure if this is good or bad...

First of all, a big thanks for this great software, which works really nice!

In the graphs, the latency for Up and Down is shown. I'm wondering how this is done considering that client and server are usually different machines with unsynchronized clocks?