[all-commits] [llvm/llvm-project] be9284: [AMDGPU] NFC: Add schedule-relaxed-occupancy to re...

[Jeffrey Byrnes via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: be92848ea4ef71280d2bb86e04d548dad2def94b
      https://github.com/llvm/llvm-project/commit/be92848ea4ef71280d2bb86e04d548dad2def94b
  Author: Jeffrey Byrnes <Jeffrey.Byrnes at amd.com>
  Date:   2023-06-28 (Wed, 28 Jun 2023)

  Changed paths:
    M llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
    A llvm/test/CodeGen/AMDGPU/schedule-relaxed-occupancy.ll

  Log Message:
  -----------
  [AMDGPU] NFC: Add schedule-relaxed-occupancy to relax occupancy targets for wave-limited/membound kernels

Default scheduling behavior for these types of kernels is to chase high occupancy goals with scheduling heuristics, but allow occupancy drops if we are unable to reach the target.

This (experimental, off-by-default) feature relaxes occupancy target from the beginning, which enables scheduler to produce better ILP schedules.

Differential Revision: https://reviews.llvm.org/D153925

Change-Id: I112833214e2db869704591f4df3c4574d0fcbb1b