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add build option for page locked memory #70

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burlen opened this issue Sep 11, 2023 · 0 comments
Open

add build option for page locked memory #70

burlen opened this issue Sep 11, 2023 · 0 comments

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@burlen
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burlen commented Sep 11, 2023

performance on perlmutter is worse when using page locked memory for host/device memory transfers. it seems that the allocator is sufficiently expensive that any gain in transfer speed is lost. add a compile option to disable.
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@burlen