Mercurial > hg > truffle
comparison src/share/vm/gc_implementation/shared/parGCAllocBuffer.hpp @ 10374:87c64c0438fb
6976350: G1: deal with fragmentation while copying objects during GC
Summary: Create G1ParGCAllocBufferContainer to contain two buffers instead of previously using one buffer, in order to hold the first priority buffer longer. Thus, when some large objects hits the value of free space left in the first priority buffer it has an alternative to fit in the second priority buffer while the first priority buffer is given more chances to try allocating smaller objects. Overall, it will improve heap space efficiency.
Reviewed-by: johnc, jmasa, brutisso
Contributed-by: tamao <tao.mao@oracle.com>
| author | tamao |
|---|---|
| date | Mon, 03 Jun 2013 14:37:13 -0700 |
| parents | 2e6857353b2c |
| children | de6a9e811145 |
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| 10372:e72f7eecc96d | 10374:87c64c0438fb |
|---|---|
| 156 } | 156 } |
| 157 | 157 |
| 158 // Fills in the unallocated portion of the buffer with a garbage object. | 158 // Fills in the unallocated portion of the buffer with a garbage object. |
| 159 // If "end_of_gc" is TRUE, is after the last use in the GC. IF "retain" | 159 // If "end_of_gc" is TRUE, is after the last use in the GC. IF "retain" |
| 160 // is true, attempt to re-use the unused portion in the next GC. | 160 // is true, attempt to re-use the unused portion in the next GC. |
| 161 void retire(bool end_of_gc, bool retain); | 161 virtual void retire(bool end_of_gc, bool retain); |
| 162 | 162 |
| 163 void print() PRODUCT_RETURN; | 163 void print() PRODUCT_RETURN; |
| 164 }; | 164 }; |
| 165 | 165 |
| 166 // PLAB stats book-keeping | 166 // PLAB stats book-keeping |