[llvm] 5b2fee8 - [AMDGPU] NFC: Add flag to disable clustered low occupancy phase (#73025)
via llvm-commits
llvm-commits at lists.llvm.org
Tue Nov 21 12:43:18 PST 2023
Author: Jeffrey Byrnes
Date: 2023-11-21T12:43:12-08:00
New Revision: 5b2fee84189beec48a4f935afda831e1ebdcce1e
URL: https://github.com/llvm/llvm-project/commit/5b2fee84189beec48a4f935afda831e1ebdcce1e
DIFF: https://github.com/llvm/llvm-project/commit/5b2fee84189beec48a4f935afda831e1ebdcce1e.diff
LOG: [AMDGPU] NFC: Add flag to disable clustered low occupancy phase (#73025)
This will help users analyze whether high register usage is coming from
inability of scheduler to reduce RP, or from sacrificing good RP to
improve ILP.
Added:
Modified:
llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
Removed:
################################################################################
diff --git a/llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp b/llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
index c3d60b635d3240a..6c044cae0d17f5b 100644
--- a/llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
+++ b/llvm/lib/Target/AMDGPU/GCNSchedStrategy.cpp
@@ -37,6 +37,13 @@ static cl::opt<bool> DisableUnclusterHighRP(
cl::desc("Disable unclustered high register pressure "
"reduction scheduling stage."),
cl::init(false));
+
+static cl::opt<bool> DisableClusteredLowOccupancy(
+ "amdgpu-disable-clustered-low-occupancy-reschedule", cl::Hidden,
+ cl::desc("Disable clustered low occupancy "
+ "rescheduling for ILP scheduling stage."),
+ cl::init(false));
+
static cl::opt<unsigned> ScheduleMetricBias(
"amdgpu-schedule-metric-bias", cl::Hidden,
cl::desc(
@@ -726,6 +733,9 @@ bool UnclusteredHighRPStage::initGCNSchedStage() {
}
bool ClusteredLowOccStage::initGCNSchedStage() {
+ if (DisableClusteredLowOccupancy)
+ return false;
+
if (!GCNSchedStage::initGCNSchedStage())
return false;
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