If the required scratch allocation is too large, ROCr will attempt to
reduce it by lowering the dispatch's targeted occupancy. The reduction
loop however was prone to overflow if waves_per_cu was not a multiple of
waves_per_group. Ensure no overflow by aligning waves_per_cu to
waves_per_group.
On GC 9.4.3 dGPU, dispatches with a large grid size and a
waves_per_group of e.g. 16 may require to reduce occupancy such that
waves_per_cu is less than waves_per_group to ensure the allocation size
is small enough. Allow this while also ensuring the tmpring scratch wave
count is kept divisible by the number of SEs per XCC.
Signed-off-by: Graham Sider <Graham.Sider@amd.com>
Change-Id: Ie4016dcd8166a9ae69e9decc26a3eec882b49480
[ROCm/ROCR-Runtime commit: bd63e5045c]
Graham Sider
53b5692d07