Revec: Program Rejuvenation through Revectorization · HackerPapers discussions

Revec: Program Rejuvenation through Revectorization — mentioned by ajayjain

Mon, 13 Jul 2020 18:50:02 GMT

Two years ago, I wrote an LLVM compiler pass that automatically upgrades SSE or AVX-2 code to AVX-512 when those instructions are available. It's helpful for getting performance gains for hand engineered code that you don't want to touch. We saw some good gains on integer workloads (unpacking, useful for databases - something I'd call "regular code"): 1.16x speedup going from SSE to AVX-2, and 1.43x speedup going from SSE to AVX-512. Even better speedups are available for FP workloads, though hand-writing the AVX-512 version can work a lot better since programmers can exploit the full range…

Paper and discussion history. A mention is not an endorsement.

Revec: Program Rejuvenation through Revectorization — HN submission

Mon, 29 Jul 2019 15:53:00 GMT

Revec: Program Rejuvenation Through Revectorization

1 point; 0 discussion replies on HN. Paper and source history. A submission is not an endorsement.

Revec: Program Rejuvenation through Revectorization — HN submission

Sun, 28 Jul 2019 03:12:43 GMT

Revec: Program Rejuvenation Through Revectorization

2 points; 0 discussion replies on HN. Paper and source history. A submission is not an endorsement.