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Supported an OPENCL_VISIBLE_DEVICES environment variable inspired fro…#153

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cdai2 wants to merge 1 commit intoKhronosGroup:mainfrom
cdai2:enable_visible_device
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Supported an OPENCL_VISIBLE_DEVICES environment variable inspired fro…#153
cdai2 wants to merge 1 commit intoKhronosGroup:mainfrom
cdai2:enable_visible_device

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@cdai2 cdai2 commented Aug 2, 2021

…m CUDA_VISIBLE_DEVICES.

OPENCL_VISIBLE_DEVICES=descriptor_list
descriptor_list -> descriptor | descriptor::descriptor_list
descriptor -> driver,platform | driver,platform,type | driver,platform,type,device_list
device_list -> device_id | device_id,device_list
driver: client driver (foo.icd or foo.so)
platform: platform ID
type: gpu, cpu, accelerator, custom, or any
device_id: device ID in the platform

This patch is to land #45 again.
Most of the code is from pull request 45.

e.g., OPENCL_VISIBLE_DEVICES=foo.icd,0,gpu,0,1::bar.icd,1,cpu,0 only shows

  • GPU 0, 1 in the first platform of foo.icd
  • CPU 0 in the second platform of bar.icd

…m CUDA_VISIBLE_DEVICES.

OPENCL_VISIBLE_DEVICES=descriptor_list
descriptor_list -> descriptor | descriptor::descriptor_list
descriptor -> driver,platform | driver,platform,type | driver,platform,type,device_list
device_list -> device_id | device_id,device_list
driver: client driver (foo.icd or foo.so)
platform: platform ID
type: gpu, cpu, accelerator, custom, or any
device_id: device ID in the platform

This patch is to land KhronosGroup#45 again.
Most of the code is from pull request 45.

e.g., OPENCL_VISIBLE_DEVICES=foo.icd,0,gpu,0,1::bar.icd,1,cpu,0 only shows
- GPU 0, 1 in the first platform of foo.icd
- CPU 0 in the second platform of bar.icd
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