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Increase gfx942 CU count to 96 for UNROLL=4 #1302

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Details

Do not mention proprietary info or link to internal work items in this PR.

Work item:
Internal

What were the changes?
Use UNROLL=4 for gfx942 and up to 96 CUs

Why were the changes made?
Improve performance

Approval Checklist

Do not approve until these items are satisfied.

  • Verify the CHANGELOG has been updated, if
    • there are any NCCL API version changes,
    • any changes impact library users, and/or
    • any changes impact any other ROCm library.

@nileshnegi nileshnegi force-pushed the topic/unroll4-96CU branch 2 times, most recently from 50b22b9 to 7cb60be Compare August 23, 2024 17:21
@nileshnegi nileshnegi self-assigned this Aug 27, 2024
((comm->topo->nodes[GPU].nodes[0].gpu.cu == 80 || comm->topo->nodes[GPU].nodes[0].gpu.cu == 20 || comm->topo->nodes[GPU].nodes[0].gpu.cu == 38)
((comm->topo->nodes[GPU].nodes[0].gpu.cu == 38 ||
comm->topo->nodes[GPU].nodes[0].gpu.cu == 80 || comm->topo->nodes[GPU].nodes[0].gpu.cu == 20 ||
comm->topo->nodes[GPU].nodes[0].gpu.cu == 96 || comm->topo->nodes[GPU].nodes[0].gpu.cu == 24)
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With #1310, we can use std::min(comm->topo->nodes[GPU].nodes[0].gpu.cu, MAXCHANNELS)

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