x265 benchmark on a 7975WX Threadripper

[Z2697]

Originally Posted by jpsdr

No, can't try Linux.

I'll try zenver2 with AVX512 compile options enabled, when i have time, but even if broken, LLVM is still faster than GCC.

You use gcc with mcfgthread exclusively, or you have tested "original" gcc?

[jpsdr]

Originally Posted by RanmaCanada

I am sure many would like to see you run the advanced benchmark sagittare created..

https://forum.doom9.org/showthread.php?t=185855

I can't download it, it asks for email/pswd i don't have...

Edit:
Finaly, i've been able to get it.
Result on sagittare thread soon...

[jpsdr]

Originally Posted by Z2697

You use gcc with mcfgthread exclusively, or you have tested "original" gcc?

I don't know if it's the "original" for you, but here result build with version 13.1.0 (20230426 version from http://msystem.waw.pl/x265/) and zen4 arch. AVX512 & 64 cores.

Windows 10
Pass 1: encoded 128 frames in 44.99s (2.85 fps) => -3.6%
Pass 2: encoded 128 frames in 73.95s (1.73 fps) => -4.2%
Pass 3: encoded 128 frames in 62.98s (2.03 fps) => -3.9%
Windows 11
Pass 1: encoded 128 frames in 44.49s (2.88 fps) => -3.8%
Pass 2: encoded 128 frames in 113.44s (1.13 fps) => -1.9%
Pass 3: encoded 128 frames in 95.81s (1.34 fps) => -2.4%

Whell, mcf is indeed a little better than "original", so as LLVM is better than mcf, it's also better than "original".

I was said that Zen4 is broken under LLVM, at what version ?
And is it sure it's still the case and not been fixed yet ?
Because even if Zen4 LLVM is broken, it's still perform better than Zen4 GCC, both "original" and mcf.

[jpsdr]

Benchmark of sagittare posted on his thread.

Windows 10 wins all.