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Altera_Forum's avatar
Altera_Forum
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8 years ago

large number of small work-groups vs small number of large work-groups

Hello, I appreciate it if anyone can answer my question. I have a ND-range configuration, with 1 CU, and without SIMD (I mean a single PE in the single CU). Work-items access only to global mem...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Yes, every CU only has one pipeline, and every work-item, regardless of which work-group it belongs to, goes through that pipeline. With one CU, if you are not using SIMD or local memory, the size of your work-group will not affect performance.