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src/hotspot/share/memory/metaspace/metaspaceCommon.hpp
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rev 50068 : [mq]: metaspace-split
@@ -23,18 +23,27 @@
*/
#ifndef SHARE_MEMORY_METASPACE_METASPACECOMMON_HPP_
#define SHARE_MEMORY_METASPACE_METASPACECOMMON_HPP_
+#include "utilities/debug.hpp"
#include "utilities/globalDefinitions.hpp"
-
class outputStream;
namespace metaspace {
namespace internals {
+enum ChunkSizes { // in words.
+ ClassSpecializedChunk = 128,
+ SpecializedChunk = 128,
+ ClassSmallChunk = 256,
+ SmallChunk = 512,
+ ClassMediumChunk = 4 * K,
+ MediumChunk = 8 * K
+};
+
// Print a size, in words, scaled.
void print_scaled_words(outputStream* st, size_t word_size, size_t scale = 0, int width = -1);
// Convenience helper: prints a size value and a percentage.
void print_scaled_words_and_percentage(outputStream* st, size_t word_size, size_t compare_word_size, size_t scale = 0, int width = -1);
@@ -48,9 +57,75 @@
// Prints a percentage value. Values smaller than 1% but not 0 are displayed as "<1%", values
// larger than 99% but not 100% are displayed as ">100%".
void print_percentage(outputStream* st, size_t total, size_t part);
+
+#define assert_is_aligned(value, alignment) \
+ assert(is_aligned((value), (alignment)), \
+ SIZE_FORMAT_HEX " is not aligned to " \
+ SIZE_FORMAT, (size_t)(uintptr_t)value, (alignment))
+
+// Internal statistics.
+#ifdef ASSERT
+struct internal_statistics_t {
+ // Number of allocations.
+ uintx num_allocs;
+ // Number of times a ClassLoaderMetaspace was born...
+ uintx num_metaspace_births;
+ // ... and died.
+ uintx num_metaspace_deaths;
+ // Number of times VirtualSpaceListNodes were created...
+ uintx num_vsnodes_created;
+ // ... and purged.
+ uintx num_vsnodes_purged;
+ // Number of times we expanded the committed section of the space.
+ uintx num_committed_space_expanded;
+ // Number of deallocations
+ uintx num_deallocs;
+ // Number of deallocations triggered from outside ("real" deallocations).
+ uintx num_external_deallocs;
+ // Number of times an allocation was satisfied from deallocated blocks.
+ uintx num_allocs_from_deallocated_blocks;
+};
+extern internal_statistics_t g_internal_statistics;
+#endif
+
+// ChunkIndex defines the type of chunk.
+// Chunk types differ by size: specialized < small < medium, chunks
+// larger than medium are humongous chunks of varying size.
+enum ChunkIndex {
+ ZeroIndex = 0,
+ SpecializedIndex = ZeroIndex,
+ SmallIndex = SpecializedIndex + 1,
+ MediumIndex = SmallIndex + 1,
+ HumongousIndex = MediumIndex + 1,
+ NumberOfFreeLists = 3,
+ NumberOfInUseLists = 4
+};
+
+// Utility functions.
+size_t get_size_for_nonhumongous_chunktype(ChunkIndex chunk_type, bool is_class);
+ChunkIndex get_chunk_type_by_size(size_t size, bool is_class);
+
+ChunkIndex next_chunk_index(ChunkIndex i);
+ChunkIndex prev_chunk_index(ChunkIndex i);
+// Returns a descriptive name for a chunk type.
+const char* chunk_size_name(ChunkIndex index);
+
+// Verify chunk type.
+inline bool is_valid_chunktype(ChunkIndex index) {
+ return index == SpecializedIndex || index == SmallIndex ||
+ index == MediumIndex || index == HumongousIndex;
+}
+
+inline bool is_valid_nonhumongous_chunktype(ChunkIndex index) {
+ return is_valid_chunktype(index) && index != HumongousIndex;
+}
+
+
+
+
} // namespace internals
} // namespace metaspace
#endif /* SHARE_MEMORY_METASPACE_METASPACESTATISTICS_HPP_ */
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