Mercurial > hg > graal-jvmci-8
comparison src/share/vm/gc_implementation/g1/g1CollectedHeap.hpp @ 4781:bacb651cf5bf
7113006: G1: excessive ergo output when an evac failure happens
Summary: Introduce a flag that is set when a heap expansion attempt during a GC fails so that we do not consantly attempt to expand the heap when it's going to fail anyway. This not only prevents the excessive ergo output (which is generated when a region allocation fails) but also avoids excessive and ultimately unsuccessful expansion attempts.
Reviewed-by: jmasa, johnc
| author | tonyp |
|---|---|
| date | Thu, 05 Jan 2012 05:54:01 -0500 |
| parents | 441e946dc1af |
| children | 023652e49ac0 |
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| 4747:4753e3dda3c8 | 4781:bacb651cf5bf |
|---|---|
| 282 OldGCAllocRegion _old_gc_alloc_region; | 282 OldGCAllocRegion _old_gc_alloc_region; |
| 283 | 283 |
| 284 // The last old region we allocated to during the last GC. | 284 // The last old region we allocated to during the last GC. |
| 285 // Typically, it is not full so we should re-use it during the next GC. | 285 // Typically, it is not full so we should re-use it during the next GC. |
| 286 HeapRegion* _retained_old_gc_alloc_region; | 286 HeapRegion* _retained_old_gc_alloc_region; |
| 287 | |
| 288 // It specifies whether we should attempt to expand the heap after a | |
| 289 // region allocation failure. If heap expansion fails we set this to | |
| 290 // false so that we don't re-attempt the heap expansion (it's likely | |
| 291 // that subsequent expansion attempts will also fail if one fails). | |
| 292 // Currently, it is only consulted during GC and it's reset at the | |
| 293 // start of each GC. | |
| 294 bool _expand_heap_after_alloc_failure; | |
| 287 | 295 |
| 288 // It resets the mutator alloc region before new allocations can take place. | 296 // It resets the mutator alloc region before new allocations can take place. |
| 289 void init_mutator_alloc_region(); | 297 void init_mutator_alloc_region(); |
| 290 | 298 |
| 291 // It releases the mutator alloc region. | 299 // It releases the mutator alloc region. |