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view src/os_cpu/linux_x86/vm/globals_linux_x86.hpp @ 3766:c3f1170908be
7045330: G1: Simplify/fix the HeapRegionSeq class
7042285: G1: native memory leak during humongous object allocation
6804436: G1: heap region indices should be size_t
Summary: A series of fixes and improvements to the HeapRegionSeq class: a) replace the _regions growable array with a standard C array, b) avoid de-allocating / re-allocating HeapRegion instances when the heap shrinks / grows (fix for 7042285), c) introduce fast method to map address to HeapRegion via a "biased" array pointer, d) embed the _hrs object in G1CollectedHeap, instead of pointing to it via an indirection, e) assume that all the regions added to the HeapRegionSeq instance are contiguous, f) replace int's with size_t's for indexes (and expand that to HeapRegion as part of 6804436), g) remove unnecessary / unused methods, h) rename a couple of fields (_alloc_search_start and _seq_bottom), i) fix iterate_from() not to always start from index 0 irrespective of the region passed to it, j) add a verification method to check the HeapRegionSeq assumptions, k) always call the wrappers for _hrs.iterate(), _hrs_length(), and _hrs.at() from G1CollectedHeap, not those methods directly, and l) unify the code that expands the sequence (by either re-using or creating a new HeapRegion) and make it robust wrt to a HeapRegion allocation failing.
Reviewed-by: stefank, johnc, brutisso
| author | tonyp |
|---|---|
| date | Fri, 10 Jun 2011 13:16:40 -0400 |
| parents | f95d63e2154a |
| children | da91efe96a93 |
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/* * Copyright (c) 2000, 2010, 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. * */ #ifndef OS_CPU_LINUX_X86_VM_GLOBALS_LINUX_X86_HPP #define OS_CPU_LINUX_X86_VM_GLOBALS_LINUX_X86_HPP // Sets the default values for platform dependent flags used by the runtime system. // (see globals.hpp) define_pd_global(bool, DontYieldALot, false); #ifdef AMD64 define_pd_global(intx, ThreadStackSize, 1024); // 0 => use system default define_pd_global(intx, VMThreadStackSize, 1024); #else // ThreadStackSize 320 allows a couple of test cases to run while // keeping the number of threads that can be created high. System // default ThreadStackSize appears to be 512 which is too big. define_pd_global(intx, ThreadStackSize, 320); define_pd_global(intx, VMThreadStackSize, 512); #endif // AMD64 define_pd_global(intx, CompilerThreadStackSize, 0); define_pd_global(uintx,JVMInvokeMethodSlack, 8192); // Only used on 64 bit platforms define_pd_global(uintx,HeapBaseMinAddress, 2*G); // Only used on 64 bit Windows platforms define_pd_global(bool, UseVectoredExceptions, false); #endif // OS_CPU_LINUX_X86_VM_GLOBALS_LINUX_X86_HPP