Increase early recompilation threshold for default GRF

Restore threshold to 500.

Author: stefan-il

IGC/Compiler/CISACodeGen/EmitVISAPass.cpp

@@ -675,16 +675,16 @@ bool EmitPass::shouldForceEarlyRecompile(MetaDataUtils *pMdUtils,
   if (m_currShader->IsRecompilationRequestForced()) {
     return true;
   }
-  auto Threshold = IGC_GET_FLAG_VALUE(EarlyRetryRPEThreshold);
+  auto Threshold = IGC_GET_FLAG_VALUE(EarlyRetryLargeGRFThreshold);
   auto GRFPerThread = m_pCtx->getNumGRFPerThread();
-  // If we are not in large GRF mode and auto GRF is disabled we can lower the
-  // threshold. We also, as a workaround skip lowering the threshold if we have
-  // indirect operands in the kernel to avoid cases where recompilaton has
-  // higher spill count.
+  // If we are not in large GRF mode and auto GRF is disabled we use
+  // threshold set for default GRF size if it is lower. We also, as a workaround
+  // skip lowering the threshold if we have indirect operands in the kernel to
+  // avoid cases where recompilaton has higher spill count.
   if (GRFPerThread <= CodeGenContext::DEFAULT_TOTAL_GRF_NUM &&
       !m_pCtx->isAutoGRFSelectionEnabled() &&
       !m_pCtx->m_instrTypes.mayHaveIndirectOperands) {
-    Threshold = Threshold / 2;
+    Threshold = std::min(Threshold, IGC_GET_FLAG_VALUE(EarlyRetryDefaultGRFThreshold));
   }
   auto MaxRegPressure = getMaxRegPressureInFunctionGroup(F, pMdUtils);
   bool PassedThreshold = MaxRegPressure >= Threshold;

IGC/common/igc_flags.h

@@ -857,7 +857,8 @@ DECLARE_IGC_REGKEY(DWORD, RegPressureVerbocity,   0,  "Different printing types"
 DECLARE_IGC_REGKEY(DWORD, RetryRevertExcessiveSpillingKernelThreshold, 10000,  "Sets the threshold for Retry Manager to know which kernel is considered as Excessive Spilling and applies different set of rules", false)
 DECLARE_IGC_REGKEY(DWORD, RetryRevertExcessiveSpillingKernelCoefficient, 102,  "Sets the coefficient for Retry Manager to know whether we should revert back to a previously compiled kernel", false)
 DECLARE_IGC_REGKEY(DWORD, ForceSIMDRPELimit, 1000, "Cutoff value for register estimator, when higher than that kernel is switched to lower SIMD when possible", false)
-DECLARE_IGC_REGKEY(DWORD, EarlyRetryRPEThreshold, 380, "Cutoff value for register estimation, when highter than that kernel skips first compilation stage and goes to retry immediately. Threshold is halved in case of default GRF.", false)
+DECLARE_IGC_REGKEY(DWORD, EarlyRetryLargeGRFThreshold, 500, "Cutoff value for register estimation, when highter than that kernel skips first compilation stage and goes to retry immediately for large GRF.", false)
+DECLARE_IGC_REGKEY(DWORD, EarlyRetryDefaultGRFThreshold, 190, "Cutoff value for register estimation, when highter than that kernel skips first compilation stage and goes to retry immediately for default GRF.", false)
 DECLARE_IGC_REGKEY(bool, ForceNoFP64bRegioning, false, "force regioning rules for FP and 64b FPU instructions", false)
 DECLARE_IGC_REGKEY(bool, EnableA64WA, true, "Guarantee A64 load/store addres-hi is uniform", true)
 DECLARE_IGC_REGKEY(bool, EnableSamplerSplit, false, "Split Sampler 3d message to odd and even", false)