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Old 28th April 2020, 10:33   #1446  |  Link
MeteorRain
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Join Date: Dec 2003
Location: NJ; OR; Shanghai
Posts: 894
Quote:
Originally Posted by tormento View Post
Unfortunately I can't find the page anymore, I can summarize only.

By SIMDjson benchmark, it was shown that Intel has more AVX2 IPC than Zen2.

Apart from that, the higher core count could nullify that penalty.

Zen3 should come across that and introduce AVX512 too.
I found that benchmark. It was concluded that AMD has a poor IPC performance on AVX2. That is kinda expected, and actually many factors matters including that SIMDjson was optimized against Intel processors.
CPU pipelines, instruction order, cache size, even picking one instruction over another, can make a lot difference.
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