Issue with SavvyCan(V213) slowdown during frame transmission in fuzzing

[ksmagala]

Issue with SavvyCan(V213) slowdown during frame transmission in fuzzing

[collin80]

That sounds suspiciously like a bug in SavvyCAN but I'm not sure where/why right now. It's weird that it would happen like you're describing but your description is quite helpful for me to track this down. Are you sequentially scanning the address space in each instance?

[ksmagala]

I've noticed a problem that occurs both with sequential and random ID scanning. Regardless of the method, after reaching a specific number of IDs (2048), the rate of frames per second returns to normal.

I attempted to compile the application myself from the master branch to investigate the issue. Unfortunately, after successful compilation, the application shuts down when trying to launch fuzzing functions or send custom frames.

Do you know what could be causing this issue? I am using Qt version 6.6.3 and Qt Creator 13.0.0 for compilation. Is it necessary to use an older version of Qt, such as 5.14, to compile code from the master branch?

EDIT: The issue of compilation and launching is no longer a problem, as with the version of Qt 5.15 that we managed to download, the application compiles and launches without any issues. Now, we need to identify the cause of this bug.

Thank you in advance for your help.

[ksmagala]

I conducted a frame transmission speed test on a 2020 13” MacBook (i5, 16GB, OS Ventura). After initiating the test on MacOS, I noticed that within the ID range from 0x000 to 0x7FF, the frame transmission speed slows down. When the count exceeds 2048, the frame transmission rate per second does not increase as it does with the program running on Windows 10, and remains within the range of 5-30 frames per second. Below, I am also attaching screenshots.