BRP4G enhanced (faster) app

Hello fellow crunchers,

I created a faster version of BRP4G application. I know that CPU apps do not generate much credit, but I did it anyway for personal satisfaction.
You can expect a speedup of up to 50% if you don't hit the memory speed limit. For example, the time to complete when running 4 tasks can go down from 8600 seconds per each to 5600 seconds per each. I did not check the benefits in all-cores mode, but it should still be a bit faster than original.

Optimized version:

You need a SSE4-capable processor. Every mainstream AMD / Intel processor produced in last 10 years have this instruction set.
You need to set up an Anonymous platform.

1. Set project to "no new tasks", wait for it to finish the cache of work. Optionally, you skip this step - E@H scheduler will probably resend you the tasks but they will start from scratch.
2. Stop BOINC (close / kill program).
3. Download https://drive.google.com/file/d/1dLO9oi7NRr5yl2xftYEmRjfbKewk1-1q/view?usp=sharing, choose windows or linux subdirectory and unpack the applications and app_info.xml to the einstein.phys.uwm.edu directory.
4. Use provided app_info.xml as a starting point.
   1. If you want to use other applications, you need to add them yourself to this file. See file sched_reply_einstein.phys.uwm.edu.xml for hints about names. You also need the original binaries for the other applications, copy them temporarily somewhere else so that BOINC don't delete them (just in case).
5. Run wisdom_generator application, it will take a long time (about 1 hour on Ryzen 9 7950X, single core performance matters). The application will generate BRP4.wisdom (FFTW wisdom) file in current directory. Ensure that the file is in the einstein.phys.uwm.edu, alongside the applications.
   1. FFTW wisdom is a kind of precalculated plan adjusted to your hardware for optimal performance. The default plan is not good enough, but it is generated in seconds.
6. Start BOINC, check logs if anonymous platform was recognized without errors.
   1. In the logs of the task you should see a line "Using FFTW wisdom from file ../../projects/einstein.phys.uwm.edu/BRP4.wisdom." if the wisdom file was loaded correctly.
7. ???
8. Profit ;)

Some speedup with original application (Linux only):

If you don't want to set up an anonymous platform, you can still get a part of the speed up benefit by generating a wisdom file. You can expect up to 30% speedup if you don't hit the memory speed limit (I did not measure the speedup thoroughly, but it was noticeable).

Windows users, you are out of luck. The original application can load system-provided wisdom file, but only on Linux.

1. Download the wisdom_generator app: https://drive.google.com/file/d/1gQPaJDCpUf2hOc7Qrrs6Id1oOk7z_0R9/view?usp=drive_link. This version of wisdom_generator uses the same compiler flags and FFTW version as the original application.
2. Run wisdom_generator application, it will take a long time (about 1 hour on Ryzen 9 7950X, single core performance matters). The application will generate BRP4.wisdom (FFTW wisdom) file in current directory. Rename it as wisdomf and place in the default system location: /etc/fftw/wisdomf.
   1. FFTW wisdom is a kind of precalculated plan adjusted to your hardware for optimal performance. The default plan is not good enough, but it is generated in seconds.
3. You don't have to restart anything, the wisdom file will be picked by currently running tasks when they start processing the next input file (the app processes 8 input files sequentially). However, to get the benefits instantly you can restart BOINC.
   1. The original application does not log any information about loading wisdom file, but if you watch completion percentage in the BOINC Manager, you will see a difference

On a side note, I think that some of the improvements could be incorporated into official app to give everyone a few percent speedup.