--- a/src/hotspot/share/gc/shared/commandLineFlagConstraintsGC.cpp Mon Apr 23 09:01:03 2018 -0700
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,470 +0,0 @@
-/*
- * Copyright (c) 2015, 2018, 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/shared/collectedHeap.hpp"
-#include "gc/shared/collectorPolicy.hpp"
-#include "gc/shared/commandLineFlagConstraintsGC.hpp"
-#include "gc/shared/plab.hpp"
-#include "gc/shared/threadLocalAllocBuffer.hpp"
-#include "runtime/arguments.hpp"
-#include "runtime/commandLineFlagRangeList.hpp"
-#include "runtime/globals.hpp"
-#include "runtime/globals_extension.hpp"
-#include "runtime/thread.inline.hpp"
-#include "utilities/align.hpp"
-#include "utilities/defaultStream.hpp"
-#include "utilities/macros.hpp"
-#if INCLUDE_ALL_GCS
-#include "gc/cms/commandLineFlagConstraintsCMS.hpp"
-#include "gc/g1/commandLineFlagConstraintsG1.hpp"
-#include "gc/parallel/commandLineFlagConstraintsParallel.hpp"
-#endif
-#ifdef COMPILER1
-#include "c1/c1_globals.hpp"
-#endif // COMPILER1
-#ifdef COMPILER2
-#include "opto/c2_globals.hpp"
-#endif // COMPILER2
-
-// Some flags that have default values that indicate that the
-// JVM should automatically determine an appropriate value
-// for that flag. In those cases it is only appropriate for the
-// constraint checking to be done if the user has specified the
-// value(s) of the flag(s) on the command line. In the constraint
-// checking functions, FLAG_IS_CMDLINE() is used to check if
-// the flag has been set by the user and so should be checked.
-
-// As ParallelGCThreads differs among GC modes, we need constraint function.
-Flag::Error ParallelGCThreadsConstraintFunc(uint value, bool verbose) {
- Flag::Error status = Flag::SUCCESS;
-
-#if INCLUDE_ALL_GCS
- status = ParallelGCThreadsConstraintFuncParallel(value, verbose);
- if (status != Flag::SUCCESS) {
- return status;
- }
-
- status = ParallelGCThreadsConstraintFuncCMS(value, verbose);
- if (status != Flag::SUCCESS) {
- return status;
- }
-#endif
-
- return status;
-}
-
-// As ConcGCThreads should be smaller than ParallelGCThreads,
-// we need constraint function.
-Flag::Error ConcGCThreadsConstraintFunc(uint value, bool verbose) {
-#if INCLUDE_ALL_GCS
- // CMS and G1 GCs use ConcGCThreads.
- if ((UseConcMarkSweepGC || UseG1GC) && (value > ParallelGCThreads)) {
- CommandLineError::print(verbose,
- "ConcGCThreads (" UINT32_FORMAT ") must be "
- "less than or equal to ParallelGCThreads (" UINT32_FORMAT ")\n",
- value, ParallelGCThreads);
- return Flag::VIOLATES_CONSTRAINT;
- }
-#endif
- return Flag::SUCCESS;
-}
-
-static Flag::Error MinPLABSizeBounds(const char* name, size_t value, bool verbose) {
-#if INCLUDE_ALL_GCS
- if ((UseConcMarkSweepGC || UseG1GC || UseParallelGC) && (value < PLAB::min_size())) {
- CommandLineError::print(verbose,
- "%s (" SIZE_FORMAT ") must be "
- "greater than or equal to ergonomic PLAB minimum size (" SIZE_FORMAT ")\n",
- name, value, PLAB::min_size());
- return Flag::VIOLATES_CONSTRAINT;
- }
-#endif // INCLUDE_ALL_GCS
- return Flag::SUCCESS;
-}
-
-Flag::Error MaxPLABSizeBounds(const char* name, size_t value, bool verbose) {
-#if INCLUDE_ALL_GCS
- if ((UseConcMarkSweepGC || UseG1GC || UseParallelGC) && (value > PLAB::max_size())) {
- CommandLineError::print(verbose,
- "%s (" SIZE_FORMAT ") must be "
- "less than or equal to ergonomic PLAB maximum size (" SIZE_FORMAT ")\n",
- name, value, PLAB::max_size());
- return Flag::VIOLATES_CONSTRAINT;
- }
-#endif // INCLUDE_ALL_GCS
- return Flag::SUCCESS;
-}
-
-static Flag::Error MinMaxPLABSizeBounds(const char* name, size_t value, bool verbose) {
- Flag::Error status = MinPLABSizeBounds(name, value, verbose);
-
- if (status == Flag::SUCCESS) {
- return MaxPLABSizeBounds(name, value, verbose);
- }
- return status;
-}
-
-Flag::Error YoungPLABSizeConstraintFunc(size_t value, bool verbose) {
- return MinMaxPLABSizeBounds("YoungPLABSize", value, verbose);
-}
-
-Flag::Error OldPLABSizeConstraintFunc(size_t value, bool verbose) {
- Flag::Error status = Flag::SUCCESS;
-
-#if INCLUDE_ALL_GCS
- if (UseConcMarkSweepGC) {
- return OldPLABSizeConstraintFuncCMS(value, verbose);
- } else {
- status = MinMaxPLABSizeBounds("OldPLABSize", value, verbose);
- }
-#endif
- return status;
-}
-
-Flag::Error MinHeapFreeRatioConstraintFunc(uintx value, bool verbose) {
- if (value > MaxHeapFreeRatio) {
- CommandLineError::print(verbose,
- "MinHeapFreeRatio (" UINTX_FORMAT ") must be "
- "less than or equal to MaxHeapFreeRatio (" UINTX_FORMAT ")\n",
- value, MaxHeapFreeRatio);
- return Flag::VIOLATES_CONSTRAINT;
- } else {
- return Flag::SUCCESS;
- }
-}
-
-Flag::Error MaxHeapFreeRatioConstraintFunc(uintx value, bool verbose) {
- if (value < MinHeapFreeRatio) {
- CommandLineError::print(verbose,
- "MaxHeapFreeRatio (" UINTX_FORMAT ") must be "
- "greater than or equal to MinHeapFreeRatio (" UINTX_FORMAT ")\n",
- value, MinHeapFreeRatio);
- return Flag::VIOLATES_CONSTRAINT;
- } else {
- return Flag::SUCCESS;
- }
-}
-
-static Flag::Error CheckMaxHeapSizeAndSoftRefLRUPolicyMSPerMB(size_t maxHeap, intx softRef, bool verbose) {
- if ((softRef > 0) && ((maxHeap / M) > (max_uintx / softRef))) {
- CommandLineError::print(verbose,
- "Desired lifetime of SoftReferences cannot be expressed correctly. "
- "MaxHeapSize (" SIZE_FORMAT ") or SoftRefLRUPolicyMSPerMB "
- "(" INTX_FORMAT ") is too large\n",
- maxHeap, softRef);
- return Flag::VIOLATES_CONSTRAINT;
- } else {
- return Flag::SUCCESS;
- }
-}
-
-Flag::Error SoftRefLRUPolicyMSPerMBConstraintFunc(intx value, bool verbose) {
- return CheckMaxHeapSizeAndSoftRefLRUPolicyMSPerMB(MaxHeapSize, value, verbose);
-}
-
-Flag::Error MarkStackSizeConstraintFunc(size_t value, bool verbose) {
- if (value > MarkStackSizeMax) {
- CommandLineError::print(verbose,
- "MarkStackSize (" SIZE_FORMAT ") must be "
- "less than or equal to MarkStackSizeMax (" SIZE_FORMAT ")\n",
- value, MarkStackSizeMax);
- return Flag::VIOLATES_CONSTRAINT;
- } else {
- return Flag::SUCCESS;
- }
-}
-
-Flag::Error MinMetaspaceFreeRatioConstraintFunc(uintx value, bool verbose) {
- if (value > MaxMetaspaceFreeRatio) {
- CommandLineError::print(verbose,
- "MinMetaspaceFreeRatio (" UINTX_FORMAT ") must be "
- "less than or equal to MaxMetaspaceFreeRatio (" UINTX_FORMAT ")\n",
- value, MaxMetaspaceFreeRatio);
- return Flag::VIOLATES_CONSTRAINT;
- } else {
- return Flag::SUCCESS;
- }
-}
-
-Flag::Error MaxMetaspaceFreeRatioConstraintFunc(uintx value, bool verbose) {
- if (value < MinMetaspaceFreeRatio) {
- CommandLineError::print(verbose,
- "MaxMetaspaceFreeRatio (" UINTX_FORMAT ") must be "
- "greater than or equal to MinMetaspaceFreeRatio (" UINTX_FORMAT ")\n",
- value, MinMetaspaceFreeRatio);
- return Flag::VIOLATES_CONSTRAINT;
- } else {
- return Flag::SUCCESS;
- }
-}
-
-Flag::Error InitialTenuringThresholdConstraintFunc(uintx value, bool verbose) {
-#if INCLUDE_ALL_GCS
- Flag::Error status = InitialTenuringThresholdConstraintFuncParallel(value, verbose);
- if (status != Flag::SUCCESS) {
- return status;
- }
-#endif
-
- return Flag::SUCCESS;
-}
-
-Flag::Error MaxTenuringThresholdConstraintFunc(uintx value, bool verbose) {
-#if INCLUDE_ALL_GCS
- Flag::Error status = MaxTenuringThresholdConstraintFuncParallel(value, verbose);
- if (status != Flag::SUCCESS) {
- return status;
- }
-#endif
-
- // MaxTenuringThreshold=0 means NeverTenure=false && AlwaysTenure=true
- if ((value == 0) && (NeverTenure || !AlwaysTenure)) {
- CommandLineError::print(verbose,
- "MaxTenuringThreshold (0) should match to NeverTenure=false "
- "&& AlwaysTenure=true. But we have NeverTenure=%s "
- "AlwaysTenure=%s\n",
- NeverTenure ? "true" : "false",
- AlwaysTenure ? "true" : "false");
- return Flag::VIOLATES_CONSTRAINT;
- }
- return Flag::SUCCESS;
-}
-
-Flag::Error MaxGCPauseMillisConstraintFunc(uintx value, bool verbose) {
-#if INCLUDE_ALL_GCS
- Flag::Error status = MaxGCPauseMillisConstraintFuncG1(value, verbose);
- if (status != Flag::SUCCESS) {
- return status;
- }
-#endif
-
- return Flag::SUCCESS;
-}
-
-Flag::Error GCPauseIntervalMillisConstraintFunc(uintx value, bool verbose) {
-#if INCLUDE_ALL_GCS
- Flag::Error status = GCPauseIntervalMillisConstraintFuncG1(value, verbose);
- if (status != Flag::SUCCESS) {
- return status;
- }
-#endif
-
- return Flag::SUCCESS;
-}
-
-Flag::Error InitialBootClassLoaderMetaspaceSizeConstraintFunc(size_t value, bool verbose) {
- size_t aligned_max = align_down(max_uintx/2, Metaspace::reserve_alignment_words());
- if (value > aligned_max) {
- CommandLineError::print(verbose,
- "InitialBootClassLoaderMetaspaceSize (" SIZE_FORMAT ") must be "
- "less than or equal to aligned maximum value (" SIZE_FORMAT ")\n",
- value, aligned_max);
- return Flag::VIOLATES_CONSTRAINT;
- }
- return Flag::SUCCESS;
-}
-
-// To avoid an overflow by 'align_up(value, alignment)'.
-static Flag::Error MaxSizeForAlignment(const char* name, size_t value, size_t alignment, bool verbose) {
- size_t aligned_max = ((max_uintx - alignment) & ~(alignment-1));
- if (value > aligned_max) {
- CommandLineError::print(verbose,
- "%s (" SIZE_FORMAT ") must be "
- "less than or equal to aligned maximum value (" SIZE_FORMAT ")\n",
- name, value, aligned_max);
- return Flag::VIOLATES_CONSTRAINT;
- }
- return Flag::SUCCESS;
-}
-
-static Flag::Error MaxSizeForHeapAlignment(const char* name, size_t value, bool verbose) {
- size_t heap_alignment;
-
-#if INCLUDE_ALL_GCS
- if (UseG1GC) {
- // For G1 GC, we don't know until G1CollectorPolicy is created.
- heap_alignment = MaxSizeForHeapAlignmentG1();
- } else
-#endif
- {
- heap_alignment = CollectorPolicy::compute_heap_alignment();
- }
-
- return MaxSizeForAlignment(name, value, heap_alignment, verbose);
-}
-
-Flag::Error InitialHeapSizeConstraintFunc(size_t value, bool verbose) {
- return MaxSizeForHeapAlignment("InitialHeapSize", value, verbose);
-}
-
-Flag::Error MaxHeapSizeConstraintFunc(size_t value, bool verbose) {
- Flag::Error status = MaxSizeForHeapAlignment("MaxHeapSize", value, verbose);
-
- if (status == Flag::SUCCESS) {
- status = CheckMaxHeapSizeAndSoftRefLRUPolicyMSPerMB(value, SoftRefLRUPolicyMSPerMB, verbose);
- }
- return status;
-}
-
-Flag::Error HeapBaseMinAddressConstraintFunc(size_t value, bool verbose) {
- // If an overflow happened in Arguments::set_heap_size(), MaxHeapSize will have too large a value.
- // Check for this by ensuring that MaxHeapSize plus the requested min base address still fit within max_uintx.
- if (UseCompressedOops && FLAG_IS_ERGO(MaxHeapSize) && (value > (max_uintx - MaxHeapSize))) {
- CommandLineError::print(verbose,
- "HeapBaseMinAddress (" SIZE_FORMAT ") or MaxHeapSize (" SIZE_FORMAT ") is too large. "
- "Sum of them must be less than or equal to maximum of size_t (" SIZE_FORMAT ")\n",
- value, MaxHeapSize, max_uintx);
- return Flag::VIOLATES_CONSTRAINT;
- }
-
- return MaxSizeForHeapAlignment("HeapBaseMinAddress", value, verbose);
-}
-
-Flag::Error NewSizeConstraintFunc(size_t value, bool verbose) {
-#if INCLUDE_ALL_GCS
- Flag::Error status = NewSizeConstraintFuncG1(value, verbose);
- if (status != Flag::SUCCESS) {
- return status;
- }
-#endif
-
- return Flag::SUCCESS;
-}
-
-Flag::Error MinTLABSizeConstraintFunc(size_t value, bool verbose) {
- // At least, alignment reserve area is needed.
- if (value < ThreadLocalAllocBuffer::alignment_reserve_in_bytes()) {
- CommandLineError::print(verbose,
- "MinTLABSize (" SIZE_FORMAT ") must be "
- "greater than or equal to reserved area in TLAB (" SIZE_FORMAT ")\n",
- value, ThreadLocalAllocBuffer::alignment_reserve_in_bytes());
- return Flag::VIOLATES_CONSTRAINT;
- }
- if (value > (ThreadLocalAllocBuffer::max_size() * HeapWordSize)) {
- CommandLineError::print(verbose,
- "MinTLABSize (" SIZE_FORMAT ") must be "
- "less than or equal to ergonomic TLAB maximum (" SIZE_FORMAT ")\n",
- value, ThreadLocalAllocBuffer::max_size() * HeapWordSize);
- return Flag::VIOLATES_CONSTRAINT;
- }
- return Flag::SUCCESS;
-}
-
-Flag::Error TLABSizeConstraintFunc(size_t value, bool verbose) {
- // Skip for default value of zero which means set ergonomically.
- if (FLAG_IS_CMDLINE(TLABSize)) {
- if (value < MinTLABSize) {
- CommandLineError::print(verbose,
- "TLABSize (" SIZE_FORMAT ") must be "
- "greater than or equal to MinTLABSize (" SIZE_FORMAT ")\n",
- value, MinTLABSize);
- return Flag::VIOLATES_CONSTRAINT;
- }
- if (value > (ThreadLocalAllocBuffer::max_size() * HeapWordSize)) {
- CommandLineError::print(verbose,
- "TLABSize (" SIZE_FORMAT ") must be "
- "less than or equal to ergonomic TLAB maximum size (" SIZE_FORMAT ")\n",
- value, (ThreadLocalAllocBuffer::max_size() * HeapWordSize));
- return Flag::VIOLATES_CONSTRAINT;
- }
- }
- return Flag::SUCCESS;
-}
-
-// We will protect overflow from ThreadLocalAllocBuffer::record_slow_allocation(),
-// so AfterMemoryInit type is enough to check.
-Flag::Error TLABWasteIncrementConstraintFunc(uintx value, bool verbose) {
- if (UseTLAB) {
- size_t refill_waste_limit = Thread::current()->tlab().refill_waste_limit();
-
- // Compare with 'max_uintx' as ThreadLocalAllocBuffer::_refill_waste_limit is 'size_t'.
- if (refill_waste_limit > (max_uintx - value)) {
- CommandLineError::print(verbose,
- "TLABWasteIncrement (" UINTX_FORMAT ") must be "
- "less than or equal to ergonomic TLAB waste increment maximum size(" SIZE_FORMAT ")\n",
- value, (max_uintx - refill_waste_limit));
- return Flag::VIOLATES_CONSTRAINT;
- }
- }
- return Flag::SUCCESS;
-}
-
-Flag::Error SurvivorRatioConstraintFunc(uintx value, bool verbose) {
- if (FLAG_IS_CMDLINE(SurvivorRatio) &&
- (value > (MaxHeapSize / Universe::heap()->collector_policy()->space_alignment()))) {
- CommandLineError::print(verbose,
- "SurvivorRatio (" UINTX_FORMAT ") must be "
- "less than or equal to ergonomic SurvivorRatio maximum (" SIZE_FORMAT ")\n",
- value,
- (MaxHeapSize / Universe::heap()->collector_policy()->space_alignment()));
- return Flag::VIOLATES_CONSTRAINT;
- } else {
- return Flag::SUCCESS;
- }
-}
-
-Flag::Error MetaspaceSizeConstraintFunc(size_t value, bool verbose) {
- if (value > MaxMetaspaceSize) {
- CommandLineError::print(verbose,
- "MetaspaceSize (" SIZE_FORMAT ") must be "
- "less than or equal to MaxMetaspaceSize (" SIZE_FORMAT ")\n",
- value, MaxMetaspaceSize);
- return Flag::VIOLATES_CONSTRAINT;
- } else {
- return Flag::SUCCESS;
- }
-}
-
-Flag::Error MaxMetaspaceSizeConstraintFunc(size_t value, bool verbose) {
- if (value < MetaspaceSize) {
- CommandLineError::print(verbose,
- "MaxMetaspaceSize (" SIZE_FORMAT ") must be "
- "greater than or equal to MetaspaceSize (" SIZE_FORMAT ")\n",
- value, MaxMetaspaceSize);
- return Flag::VIOLATES_CONSTRAINT;
- } else {
- return Flag::SUCCESS;
- }
-}
-
-Flag::Error SurvivorAlignmentInBytesConstraintFunc(intx value, bool verbose) {
- if (value != 0) {
- if (!is_power_of_2(value)) {
- CommandLineError::print(verbose,
- "SurvivorAlignmentInBytes (" INTX_FORMAT ") must be "
- "power of 2\n",
- value);
- return Flag::VIOLATES_CONSTRAINT;
- }
- if (value < ObjectAlignmentInBytes) {
- CommandLineError::print(verbose,
- "SurvivorAlignmentInBytes (" INTX_FORMAT ") must be "
- "greater than or equal to ObjectAlignmentInBytes (" INTX_FORMAT ")\n",
- value, ObjectAlignmentInBytes);
- return Flag::VIOLATES_CONSTRAINT;
- }
- }
- return Flag::SUCCESS;
-}