Returns the preferred multiple of work-group size for launch.

uint get_kernel_preferred_work_group_size_multiple ( void (^block)(void)  )
uint get_kernel_preferred_work_group_size_multiple ( void (^block)(local void*, ...)  )


This kernel query function returns the preferred multiple of work-group size for launch. This is a performance hint. Specifying a work-group size that is not a multiple of the value returned by this query as the value of the local work size argument to enqueue_kernel will not fail to enqueue the block for execution unless the work-group size specified is larger than the device maximum.


OpenCL Specification

Also see


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