Mercurial > hg > truffle
comparison src/share/vm/gc_implementation/concurrentMarkSweep/concurrentMarkSweepGeneration.cpp @ 1571:2d127394260e
6916623: Align object to 16 bytes to use Compressed Oops with java heap up to 64Gb
Summary: Added new product ObjectAlignmentInBytes flag to control object alignment.
Reviewed-by: twisti, ysr, iveresov
author | kvn |
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date | Thu, 27 May 2010 18:01:56 -0700 |
parents | a8127dc669ba |
children | e9ff18c4ace7 |
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1570:de91a2f25c7e | 1571:2d127394260e |
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157 ConcurrentMarkSweepGeneration::ConcurrentMarkSweepGeneration( | 157 ConcurrentMarkSweepGeneration::ConcurrentMarkSweepGeneration( |
158 ReservedSpace rs, size_t initial_byte_size, int level, | 158 ReservedSpace rs, size_t initial_byte_size, int level, |
159 CardTableRS* ct, bool use_adaptive_freelists, | 159 CardTableRS* ct, bool use_adaptive_freelists, |
160 FreeBlockDictionary::DictionaryChoice dictionaryChoice) : | 160 FreeBlockDictionary::DictionaryChoice dictionaryChoice) : |
161 CardGeneration(rs, initial_byte_size, level, ct), | 161 CardGeneration(rs, initial_byte_size, level, ct), |
162 _dilatation_factor(((double)MinChunkSize)/((double)(oopDesc::header_size()))), | 162 _dilatation_factor(((double)MinChunkSize)/((double)(CollectedHeap::min_fill_size()))), |
163 _debug_collection_type(Concurrent_collection_type) | 163 _debug_collection_type(Concurrent_collection_type) |
164 { | 164 { |
165 HeapWord* bottom = (HeapWord*) _virtual_space.low(); | 165 HeapWord* bottom = (HeapWord*) _virtual_space.low(); |
166 HeapWord* end = (HeapWord*) _virtual_space.high(); | 166 HeapWord* end = (HeapWord*) _virtual_space.high(); |
167 | 167 |
220 // factor as: MinChunkSize/(promoting_gen's min object size) | 220 // factor as: MinChunkSize/(promoting_gen's min object size) |
221 // Since we do not have such a general query interface for the | 221 // Since we do not have such a general query interface for the |
222 // promoting generation, we'll instead just use the mimimum | 222 // promoting generation, we'll instead just use the mimimum |
223 // object size (which today is a header's worth of space); | 223 // object size (which today is a header's worth of space); |
224 // note that all arithmetic is in units of HeapWords. | 224 // note that all arithmetic is in units of HeapWords. |
225 assert(MinChunkSize >= oopDesc::header_size(), "just checking"); | 225 assert(MinChunkSize >= CollectedHeap::min_fill_size(), "just checking"); |
226 assert(_dilatation_factor >= 1.0, "from previous assert"); | 226 assert(_dilatation_factor >= 1.0, "from previous assert"); |
227 } | 227 } |
228 | 228 |
229 | 229 |
230 // The field "_initiating_occupancy" represents the occupancy percentage | 230 // The field "_initiating_occupancy" represents the occupancy percentage |