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Request for additonal attribute preferred_work_group_size_multiple #886

@fcharras

Description

@fcharras

dpctl.SyclDevice exposes a number of useful attributes when scheduling kernels, but preferred_work_group_size_multiple seems to be an important information (used when choosing kernel local size) that is missing.

It is available with clinfo:

> clinfo
...
Device Name                                     Intel(R) UHD Graphics [0x9a60]
...
Device Type                                     GPU
...
Max work group size                             512
Preferred work group size multiple              64
...

or exposed in pyopencl

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