Introduce DOTNET_JitReportMetrics

src/coreclr/jit/compiler.cpp

@@ -6329,8 +6329,6 @@ void Compiler::compCompileFinish()
         JitMemStatsInfo::finishMemStats(compArenaAllocator);
         memAllocHist.record((unsigned)((compArenaAllocator->getTotalBytesAllocated() + 1023) / 1024));
         memUsedHist.record((unsigned)((compArenaAllocator->getTotalBytesUsed() + 1023) / 1024));
-
-        Metrics.BytesAllocated = (int64_t)compArenaAllocator->getTotalBytesUsed();
     }
 
 #ifdef DEBUG
@@ -6342,6 +6340,11 @@ void Compiler::compCompileFinish()
 #endif // DEBUG
 #endif // MEASURE_MEM_ALLOC
 
+    if (JitConfig.JitReportMetrics())
+    {
+        Metrics.BytesAllocated = (int64_t)compArenaAllocator->getTotalBytesUsed();
+    }
+
 #if LOOP_HOIST_STATS
     AddLoopHoistStats();
 #endif // LOOP_HOIST_STATS
@@ -6545,7 +6548,10 @@ void Compiler::compCompileFinish()
     }
 
     JITDUMP("Final metrics:\n");
-    Metrics.report(this);
+    if (JitConfig.JitReportMetrics())
+    {
+        Metrics.report(this);
+    }
     DBEXEC(verbose, Metrics.dump());
 
     if (verbose)

src/coreclr/jit/jitconfigvalues.h

@@ -610,6 +610,9 @@ RELEASE_CONFIG_STRING(AltJitExcludeAssemblies, "AltJitExcludeAssemblies")
 // If set, measure the IR size after some phases and report it in the time log.
 RELEASE_CONFIG_INTEGER(JitMeasureIR, "JitMeasureIR", 0)
 
+// If set, report JIT metrics back to the EE after each method compilation.
+RELEASE_CONFIG_INTEGER(JitReportMetrics, "JitReportMetrics", 0)
+
 // If set, gather JIT function info and write to this file.
 RELEASE_CONFIG_STRING(JitFuncInfoFile, "JitFuncInfoLogFile")
 

src/coreclr/jit/jitmetadata.cpp

@@ -4,8 +4,6 @@
 #include "jitpch.h"
 #include "jitmetadata.h"
 
-#ifdef DEBUG
-
 //------------------------------------------------------------------------
 // JitMetadata::report: Report metadata back to the EE.
 //
@@ -46,6 +44,9 @@ void JitMetrics::report(Compiler* comp)
 #include "jitmetadatalist.h"
 }
 
+#ifdef DEBUG
+// The remaining functions are only used in debug builds.
+
 //------------------------------------------------------------------------
 // JitMetrics::mergeToRoot: Merge inlinee compiler metrics to root compiler instance
 //

src/coreclr/tools/superpmi/superpmi-shim-collector/jithost.cpp

@@ -120,7 +120,8 @@ int JitHost::getIntConfigValue(const char* key, int defaultValue)
     // even record that it was called (since it would get recorded into the
     // global state). (See the superpmi.exe tool implementation of JitHost::getIntConfigValue()
     // for the special-case implementation of this.)
-    if (strcmp(key, "SuperPMIMethodContextNumber") == 0)
+    if (strcmp(key, "SuperPMIMethodContextNumber") == 0 ||
+        strcmp(key, "JitReportMetrics") == 0)
     {
         return defaultValue;
     }

src/coreclr/tools/superpmi/superpmi/jithost.cpp

@@ -160,6 +160,11 @@ int JitHost::getIntConfigValue(const char* key, int defaultValue)
             result     = jitInstance.mc->index;
             valueFound = true;
         }
+        else if (strcmp(key, "JitReportMetrics") == 0)
+        {
+            result     = 1;
+            valueFound = true;
+        }
     }
 
     if (!valueFound)