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3
FLAC / Re: FLAC v1.4.x Performance Tests
Last post by cid42 -
Quote from: ktf on
Quote from: cid42 on
There should be intel CPU's late this year with APX at earliest.
And fragmentation continues. AVX10 is hailed to "clean up the mess of AVX-512" but all I see is even more fragmentation. flac on x86 will be an incredibly fat binary with SSE2, SSSE3, SSE4.1, AVX2, AVX512 and AVX10 code paths. Because while Intel is dropping AVX512 for AVX10, AMD just started on AVX512 and CPUs without any AVX are still being sold, so it is not like SSE can be dropped anytime soon.

APX is mostly unrelated to AVX10. Being a general core improvement instead of another SIMD category I quite like the idea of APX, it seems long overdue. But it does beg the question, can you have a fat binary containing both an APX and x86_64-non-APX path? I've just assumed there'll have to be 3 binaries, x86 x86_64 and APX. With luck it's not as fragmented as it sounds, anything with APX should have AVX10.256 or AVX10.512 right? Surely...

For intel AVX10 is about hitting the snooze button on SIMD given that they failed to make AVX512 good for years to the point that AMD ate their lunch with Zen4. Technically AVX10 256 bit is superior to AVX2, however all projects for which SIMD is relevant already have an AVX2 path so its impact will be minimal for many years. There should be some workloads that do benefit, the same ones that already benefit from AVX512 for the non-512 bit additions it has.

For full coverage there would have to be an AVX10.256 and AVX10.512 path, although OTOH I can't remember if there's much difference between AVX10.512 and AVX512. Thanks intel, clearly this wasn't an obfuscating table flip move at all. At least the AVX10.256 path can probably be adapted relatively easily from the AVX512 or AVX10.512 paths, in the same way anything prior to and including AVX2 follow the same kind of patterns.

intel CPU's haven't had a very good half decade really. They're screwing up SIMD, heterogeneous CPU's are IMO a mistake at least the way they're doing it, the CPU's run at insane power draw OOTB which is starting to prematurely degrade the latest generations all to gain a few poxy points in benchmarks. Not exactly ideal.
5
FLAC / Re: FLAC v1.4.x Performance Tests
Last post by Replica9000 -
Quote from: ktf on
Also, I think the binary is currently too fat, so it impacts branch prediction, which is most profound on small blocksizes.

Too fat in binary size or amount of code?  For me, FLAC built with GCC 12.x produces the smallest binary, and at least on my system has the best performance, even if by a very small amount.

Static binary size for x86_64:
 GCC-11 = 701.4k
 GCC-12 = 689.4k
 GCC-13 = 733.4k
 GCC-14 = 733.4k

7
Site Related Discussion / Re: Please remove my account
Last post by Case -
I think he's depressed from all the drama with ffmpeg and that's causing the discontent with everything. I don't necessarily agree with his commentary but I think it's a shame if he leaves.
9
Site Related Discussion / Re: Please remove my account
Last post by Brazil2 -
Quote from: 2012 on
What do you think propaganda means?
It's not even necessarily wrong or evil.
Two answers, among many other ones:

Quote from: https://dictionary.cambridge.org/dictionary/english/propaganda
information, ideas, opinions, or images, often only giving one part of an argument, that are broadcast, published, or in some other way spread with the intention of influencing people's opinions

Quote from: https://en.wikipedia.org/wiki/Propaganda
Propaganda is communication that is primarily used to influence or persuade an audience to further an agenda, which may not be objective and may be selectively presenting facts to encourage a particular synthesis or perception, or using loaded language to produce an emotional rather than a rational response to the information that is being presented.