[flac-dev] Performance tests on POWER8 or POWER9

Martijn van Beurden mvanb1 at gmail.com
Sat Nov 26 17:12:19 UTC 2022

Hi all,

Last year the POWER8 and POWER9 specific improvements (for PowerPC)
were completely rewritten, but as of yet no accurate performance tests
of these have been performed. I have validated functionality and rough
performance checks for these through Travis CI, but the numbers I get
through that vary wildly.

Recently the C code that these improvements mirror has been changed to
allow compilers to autovectorize it. It would be nice if someone with
access to POWER hardware could compare builds with and without POWER
specific improvements. In other words, a plain build and one with
either --disable-asm-optimizations (for autotools build) or
-DWITH_ASM=0 (for CMake).

If anyone could do such a comparison, that would be great!

Kind regards,

Martijn van Beurden

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