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src/share/vm/gc/g1/g1Allocator.cpp

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rev 8813 : imported patch 8003237-no-wait-for-free-list
rev 8814 : imported patch jon-fast-evac-failure
rev 8815 : [mq]: bengt-jon-more-naming
rev 8818 : imported patch 8073013-add-detailed-information-about-plab-memory-usage
rev 8819 : imported patch jon-review-statistics
rev 8828 : imported patch 8067339-PLAB-reallocation-might-result-in-failure-to-allocate

*** 221,247 **** for (size_t i = 0; i < ARRAY_SIZE(_direct_allocated); i++) { _direct_allocated[i] = 0; } } HeapWord* G1PLABAllocator::allocate_direct_or_new_plab(InCSetState dest, size_t word_sz, AllocationContext_t context, bool* plab_refill_failed) { ! size_t gclab_word_size = _g1h->desired_plab_sz(dest); ! if (word_sz * 100 < gclab_word_size * ParallelGCBufferWastePct) { G1PLAB* alloc_buf = alloc_buffer(dest, context); alloc_buf->retire(); ! HeapWord* buf = _allocator->par_allocate_during_gc(dest, gclab_word_size, context); if (buf != NULL) { // Otherwise. ! alloc_buf->set_word_size(gclab_word_size); alloc_buf->set_buf(buf); HeapWord* const obj = alloc_buf->allocate(word_sz); ! assert(obj != NULL, "buffer was definitely big enough..."); return obj; } // Otherwise. *plab_refill_failed = true; } --- 221,259 ---- for (size_t i = 0; i < ARRAY_SIZE(_direct_allocated); i++) { _direct_allocated[i] = 0; } } + bool G1PLABAllocator::may_throw_away_buffer(size_t const allocation_word_sz, size_t const buffer_size) const { + return (allocation_word_sz * 100 < buffer_size * ParallelGCBufferWastePct); + } + HeapWord* G1PLABAllocator::allocate_direct_or_new_plab(InCSetState dest, size_t word_sz, AllocationContext_t context, bool* plab_refill_failed) { ! size_t plab_word_size = G1CollectedHeap::heap()->desired_plab_sz(dest); ! size_t required_in_plab = word_sz + PLAB::alignment_reserve(); ! ! // Only get a new PLAB if the allocation fits and it would not waste more than ! // ParallelGCBufferWastePct in the existing buffer. ! if ((required_in_plab <= plab_word_size) && ! may_throw_away_buffer(required_in_plab, plab_word_size)) { ! G1PLAB* alloc_buf = alloc_buffer(dest, context); alloc_buf->retire(); ! HeapWord* buf = _allocator->par_allocate_during_gc(dest, plab_word_size, context); if (buf != NULL) { // Otherwise. ! alloc_buf->set_word_size(plab_word_size); alloc_buf->set_buf(buf); HeapWord* const obj = alloc_buf->allocate(word_sz); ! assert(obj != NULL, err_msg("PLAB should have been big enough, tried to allocate " ! SIZE_FORMAT " with alignment reserve " SIZE_FORMAT " PLAB size " SIZE_FORMAT, ! word_sz, PLAB::alignment_reserve(), plab_word_size)); return obj; } // Otherwise. *plab_refill_failed = true; }
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