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DPC++ multiGPU stencil and/or transpose #479

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@jeffhammond jeffhammond self-assigned this Jun 26, 2020
Jeff Hammond added 30 commits July 24, 2020 07:10
when i use 2 devices with CPU+GPU, it's fine.
when i use 1 device with GPU, it's fine.
when i use 1 device with CPU, scatter crashes in memcpy.

i have no idea what is wrong here...

Signed-off-by: Jeff Hammond <[email protected]>
Signed-off-by: Jeff Hammond <[email protected]>
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