On 09/06/2021 18:22, Black Michael via wsjt-devel wrote:
Is there some reasons to think we get a notable performance boost from
AVX?
First link I found is not impressive....very few benchmarks show much
improvement and many show less and it's at a cost of 30% or so more
CPU power consumption...fans will be screaming...looks like it mainly
helps on decoding streams.
https://www.phoronix.com/scan.php?page=article&item=rocket-lake-avx512&num=2
<https://www.phoronix.com/scan.php?page=article&item=rocket-lake-avx512&num=2>
Mike W9MDB
Mike,
the AVX instruction set adds vector operations that can do up to 8 float
or 4 double operations in parallel during a single CPU clock cycle, for
some algorithms up to a factor of 8 throughput is possible. A 30% power
consumption increase for something like a 4 fold speed increase of
suitable algorithms should be considered rather than just quoting
figures you have seen out of context.
73
Bill
G4WJS.
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