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comparison src/share/vm/memory/collectorPolicy.cpp @ 12838:85c1ca43713f

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8024547: MaxMetaspaceSize should limit the committed memory used by the metaspaces Reviewed-by: brutisso, jmasa, coleenp
author stefank
date Mon, 07 Oct 2013 15:51:08 +0200
parents 087f02e22fc2
children 4288e54fd145
comparison
equal deleted inserted replaced
12837:82af7d7a0128 12838:85c1ca43713f
45 #include "gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp" 45 #include "gc_implementation/concurrentMarkSweep/cmsGCAdaptivePolicyCounters.hpp"
46 #endif // INCLUDE_ALL_GCS 46 #endif // INCLUDE_ALL_GCS
47 47
48 // CollectorPolicy methods. 48 // CollectorPolicy methods.
49 49
50 // Align down. If the aligning result in 0, return 'alignment'.
51 static size_t restricted_align_down(size_t size, size_t alignment) {
52 return MAX2(alignment, align_size_down_(size, alignment));
53 }
54
55 void CollectorPolicy::initialize_flags() { 50 void CollectorPolicy::initialize_flags() {
56 assert(_max_alignment >= _min_alignment, 51 assert(_max_alignment >= _min_alignment,
57 err_msg("max_alignment: " SIZE_FORMAT " less than min_alignment: " SIZE_FORMAT, 52 err_msg("max_alignment: " SIZE_FORMAT " less than min_alignment: " SIZE_FORMAT,
58 _max_alignment, _min_alignment)); 53 _max_alignment, _min_alignment));
59 assert(_max_alignment % _min_alignment == 0, 54 assert(_max_alignment % _min_alignment == 0,
62 57
63 if (MaxHeapSize < InitialHeapSize) { 58 if (MaxHeapSize < InitialHeapSize) {
64 vm_exit_during_initialization("Incompatible initial and maximum heap sizes specified"); 59 vm_exit_during_initialization("Incompatible initial and maximum heap sizes specified");
65 } 60 }
66 61
67 // Do not use FLAG_SET_ERGO to update MaxMetaspaceSize, since this will
68 // override if MaxMetaspaceSize was set on the command line or not.
69 // This information is needed later to conform to the specification of the
70 // java.lang.management.MemoryUsage API.
71 //
72 // Ideally, we would be able to set the default value of MaxMetaspaceSize in
73 // globals.hpp to the aligned value, but this is not possible, since the
74 // alignment depends on other flags being parsed.
75 MaxMetaspaceSize = restricted_align_down(MaxMetaspaceSize, _max_alignment);
76
77 if (MetaspaceSize > MaxMetaspaceSize) {
78 MetaspaceSize = MaxMetaspaceSize;
79 }
80
81 MetaspaceSize = restricted_align_down(MetaspaceSize, _min_alignment);
82
83 assert(MetaspaceSize <= MaxMetaspaceSize, "Must be");
84
85 MinMetaspaceExpansion = restricted_align_down(MinMetaspaceExpansion, _min_alignment);
86 MaxMetaspaceExpansion = restricted_align_down(MaxMetaspaceExpansion, _min_alignment);
87
88 MinHeapDeltaBytes = align_size_up(MinHeapDeltaBytes, _min_alignment); 62 MinHeapDeltaBytes = align_size_up(MinHeapDeltaBytes, _min_alignment);
89
90 assert(MetaspaceSize % _min_alignment == 0, "metapace alignment");
91 assert(MaxMetaspaceSize % _max_alignment == 0, "maximum metaspace alignment");
92 if (MetaspaceSize < 256*K) {
93 vm_exit_during_initialization("Too small initial Metaspace size");
94 }
95 } 63 }
96 64
97 void CollectorPolicy::initialize_size_info() { 65 void CollectorPolicy::initialize_size_info() {
98 // User inputs from -mx and ms must be aligned 66 // User inputs from -mx and ms must be aligned
99 _min_heap_byte_size = align_size_up(Arguments::min_heap_size(), _min_alignment); 67 _min_heap_byte_size = align_size_up(Arguments::min_heap_size(), _min_alignment);