Merge pull request #187 from tajila/master

(0.41) Cumulative thread allocation stats
eclipse-openj9 · Nov 9, 2023 · 6640e5c · 6640e5c
2 parents d2c4b12 + 60868a0
commit 6640e5c
Show file tree

Hide file tree

Showing 2 changed files with 17 additions and 0 deletions.
diff --git a/gc/stats/AllocationStats.cpp b/gc/stats/AllocationStats.cpp
@@ -26,6 +26,10 @@
 void
 MM_AllocationStats::clear()
 {
+	/* calculate cumulative stats before any clear */
+	_allocationBytesCumulative += bytesAllocated();
+
+
 #if defined(OMR_GC_THREAD_LOCAL_HEAP)
 	_tlhRefreshCountFresh = 0;
 	_tlhRefreshCountReused = 0;

diff --git a/gc/stats/AllocationStats.hpp b/gc/stats/AllocationStats.hpp
@@ -49,6 +49,7 @@ class MM_AllocationStats : public MM_Base
 
 	uintptr_t _allocationCount;
 	uintptr_t _allocationBytes;
+	uintptr_t _allocationBytesCumulative;   /**< cumulative allocation up to last clear, excluding since last clear */
 	uintptr_t _ownableSynchronizerObjectCount;  /**< Number of Ownable Synchronizer Object allocations */
 	uintptr_t _continuationObjectCount;  /**< Number of Continuation Object allocations */
 	uintptr_t _discardedBytes;
@@ -86,6 +87,18 @@ class MM_AllocationStats : public MM_Base
 		return totalBytesAllocated;
 	}
 
+	bool bytesAllocatedCumulative(uintptr_t *cumulativeValue) {
+		if (NULL != cumulativeValue) {
+			/* sum the values up to last clear and since last clear */
+			*cumulativeValue = _allocationBytesCumulative + bytesAllocated();
+
+			/* return false if overflowing */
+			return (_allocationBytesCumulative <= *cumulativeValue);
+		}
+
+		return false;
+	}
+
 	MM_AllocationStats() :
 #if defined(OMR_GC_THREAD_LOCAL_HEAP)
 		_tlhRefreshCountFresh(0),