Mercurial > hg > graal-compiler
view src/share/vm/memory/tenuredGeneration.cpp @ 20565:9f35f614847d
8060169: Update the Crash Reporting URL in the Java crash log
Summary: Update the URL for HotSpot bug reports.
Reviewed-by: dcubed, rdurbin
author | dbuck |
---|---|
date | Fri, 31 Oct 2014 12:05:56 -0700 |
parents | 55fb97c4c58d |
children | 63a4eb8bcd23 |
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/* * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #include "gc_implementation/shared/collectorCounters.hpp" #include "gc_implementation/shared/parGCAllocBuffer.hpp" #include "memory/allocation.inline.hpp" #include "memory/blockOffsetTable.inline.hpp" #include "memory/generation.inline.hpp" #include "memory/generationSpec.hpp" #include "memory/space.hpp" #include "memory/tenuredGeneration.hpp" #include "oops/oop.inline.hpp" #include "runtime/java.hpp" #include "utilities/macros.hpp" TenuredGeneration::TenuredGeneration(ReservedSpace rs, size_t initial_byte_size, int level, GenRemSet* remset) : OneContigSpaceCardGeneration(rs, initial_byte_size, level, remset, NULL) { HeapWord* bottom = (HeapWord*) _virtual_space.low(); HeapWord* end = (HeapWord*) _virtual_space.high(); _the_space = new TenuredSpace(_bts, MemRegion(bottom, end)); _the_space->reset_saved_mark(); _shrink_factor = 0; _capacity_at_prologue = 0; _gc_stats = new GCStats(); // initialize performance counters const char* gen_name = "old"; // Generation Counters -- generation 1, 1 subspace _gen_counters = new GenerationCounters(gen_name, 1, 1, &_virtual_space); _gc_counters = new CollectorCounters("MSC", 1); _space_counters = new CSpaceCounters(gen_name, 0, _virtual_space.reserved_size(), _the_space, _gen_counters); #if INCLUDE_ALL_GCS if (UseParNewGC) { typedef ParGCAllocBufferWithBOT* ParGCAllocBufferWithBOTPtr; _alloc_buffers = NEW_C_HEAP_ARRAY(ParGCAllocBufferWithBOTPtr, ParallelGCThreads, mtGC); if (_alloc_buffers == NULL) vm_exit_during_initialization("Could not allocate alloc_buffers"); for (uint i = 0; i < ParallelGCThreads; i++) { _alloc_buffers[i] = new ParGCAllocBufferWithBOT(OldPLABSize, _bts); if (_alloc_buffers[i] == NULL) vm_exit_during_initialization("Could not allocate alloc_buffers"); } } else { _alloc_buffers = NULL; } #endif // INCLUDE_ALL_GCS } const char* TenuredGeneration::name() const { return "tenured generation"; } void TenuredGeneration::gc_prologue(bool full) { _capacity_at_prologue = capacity(); _used_at_prologue = used(); if (VerifyBeforeGC) { verify_alloc_buffers_clean(); } } void TenuredGeneration::gc_epilogue(bool full) { if (VerifyAfterGC) { verify_alloc_buffers_clean(); } OneContigSpaceCardGeneration::gc_epilogue(full); } bool TenuredGeneration::should_collect(bool full, size_t size, bool is_tlab) { // This should be one big conditional or (||), but I want to be able to tell // why it returns what it returns (without re-evaluating the conditionals // in case they aren't idempotent), so I'm doing it this way. // DeMorgan says it's okay. bool result = false; if (!result && full) { result = true; if (PrintGC && Verbose) { gclog_or_tty->print_cr("TenuredGeneration::should_collect: because" " full"); } } if (!result && should_allocate(size, is_tlab)) { result = true; if (PrintGC && Verbose) { gclog_or_tty->print_cr("TenuredGeneration::should_collect: because" " should_allocate(" SIZE_FORMAT ")", size); } } // If we don't have very much free space. // XXX: 10000 should be a percentage of the capacity!!! if (!result && free() < 10000) { result = true; if (PrintGC && Verbose) { gclog_or_tty->print_cr("TenuredGeneration::should_collect: because" " free(): " SIZE_FORMAT, free()); } } // If we had to expand to accomodate promotions from younger generations if (!result && _capacity_at_prologue < capacity()) { result = true; if (PrintGC && Verbose) { gclog_or_tty->print_cr("TenuredGeneration::should_collect: because" "_capacity_at_prologue: " SIZE_FORMAT " < capacity(): " SIZE_FORMAT, _capacity_at_prologue, capacity()); } } return result; } void TenuredGeneration::collect(bool full, bool clear_all_soft_refs, size_t size, bool is_tlab) { retire_alloc_buffers_before_full_gc(); OneContigSpaceCardGeneration::collect(full, clear_all_soft_refs, size, is_tlab); } void TenuredGeneration::compute_new_size() { assert_locked_or_safepoint(Heap_lock); // Compute some numbers about the state of the heap. const size_t used_after_gc = used(); const size_t capacity_after_gc = capacity(); CardGeneration::compute_new_size(); assert(used() == used_after_gc && used_after_gc <= capacity(), err_msg("used: " SIZE_FORMAT " used_after_gc: " SIZE_FORMAT " capacity: " SIZE_FORMAT, used(), used_after_gc, capacity())); } void TenuredGeneration::update_gc_stats(int current_level, bool full) { // If the next lower level(s) has been collected, gather any statistics // that are of interest at this point. if (!full && (current_level + 1) == level()) { // Calculate size of data promoted from the younger generations // before doing the collection. size_t used_before_gc = used(); // If the younger gen collections were skipped, then the // number of promoted bytes will be 0 and adding it to the // average will incorrectly lessen the average. It is, however, // also possible that no promotion was needed. if (used_before_gc >= _used_at_prologue) { size_t promoted_in_bytes = used_before_gc - _used_at_prologue; gc_stats()->avg_promoted()->sample(promoted_in_bytes); } } } void TenuredGeneration::update_counters() { if (UsePerfData) { _space_counters->update_all(); _gen_counters->update_all(); } } #if INCLUDE_ALL_GCS oop TenuredGeneration::par_promote(int thread_num, oop old, markOop m, size_t word_sz) { ParGCAllocBufferWithBOT* buf = _alloc_buffers[thread_num]; HeapWord* obj_ptr = buf->allocate(word_sz); bool is_lab = true; if (obj_ptr == NULL) { #ifndef PRODUCT if (Universe::heap()->promotion_should_fail()) { return NULL; } #endif // #ifndef PRODUCT // Slow path: if (word_sz * 100 < ParallelGCBufferWastePct * buf->word_sz()) { // Is small enough; abandon this buffer and start a new one. size_t buf_size = buf->word_sz(); HeapWord* buf_space = TenuredGeneration::par_allocate(buf_size, false); if (buf_space == NULL) { buf_space = expand_and_allocate(buf_size, false, true /* parallel*/); } if (buf_space != NULL) { buf->retire(false, false); buf->set_buf(buf_space); obj_ptr = buf->allocate(word_sz); assert(obj_ptr != NULL, "Buffer was definitely big enough..."); } }; // Otherwise, buffer allocation failed; try allocating object // individually. if (obj_ptr == NULL) { obj_ptr = TenuredGeneration::par_allocate(word_sz, false); if (obj_ptr == NULL) { obj_ptr = expand_and_allocate(word_sz, false, true /* parallel */); } } if (obj_ptr == NULL) return NULL; } assert(obj_ptr != NULL, "program logic"); Copy::aligned_disjoint_words((HeapWord*)old, obj_ptr, word_sz); oop obj = oop(obj_ptr); // Restore the mark word copied above. obj->set_mark(m); return obj; } void TenuredGeneration::par_promote_alloc_undo(int thread_num, HeapWord* obj, size_t word_sz) { ParGCAllocBufferWithBOT* buf = _alloc_buffers[thread_num]; if (buf->contains(obj)) { guarantee(buf->contains(obj + word_sz - 1), "should contain whole object"); buf->undo_allocation(obj, word_sz); } else { CollectedHeap::fill_with_object(obj, word_sz); } } void TenuredGeneration::par_promote_alloc_done(int thread_num) { ParGCAllocBufferWithBOT* buf = _alloc_buffers[thread_num]; buf->retire(true, ParallelGCRetainPLAB); } void TenuredGeneration::retire_alloc_buffers_before_full_gc() { if (UseParNewGC) { for (uint i = 0; i < ParallelGCThreads; i++) { _alloc_buffers[i]->retire(true /*end_of_gc*/, false /*retain*/); } } } // Verify that any retained parallel allocation buffers do not // intersect with dirty cards. void TenuredGeneration::verify_alloc_buffers_clean() { if (UseParNewGC) { for (uint i = 0; i < ParallelGCThreads; i++) { _rs->verify_aligned_region_empty(_alloc_buffers[i]->range()); } } } #else // INCLUDE_ALL_GCS void TenuredGeneration::retire_alloc_buffers_before_full_gc() {} void TenuredGeneration::verify_alloc_buffers_clean() {} #endif // INCLUDE_ALL_GCS bool TenuredGeneration::promotion_attempt_is_safe(size_t max_promotion_in_bytes) const { size_t available = max_contiguous_available(); size_t av_promo = (size_t)gc_stats()->avg_promoted()->padded_average(); bool res = (available >= av_promo) || (available >= max_promotion_in_bytes); if (PrintGC && Verbose) { gclog_or_tty->print_cr( "Tenured: promo attempt is%s safe: available("SIZE_FORMAT") %s av_promo("SIZE_FORMAT")," "max_promo("SIZE_FORMAT")", res? "":" not", available, res? ">=":"<", av_promo, max_promotion_in_bytes); } return res; }