jvmFlagConstraintsParallel.cpp

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#include "precompiled.hpp"
#include "gc/parallel/jvmFlagConstraintsParallel.hpp"
#include "gc/shared/gc_globals.hpp"
#include "runtime/globals.hpp"
#include "utilities/globalDefinitions.hpp"

JVMFlag::Error ParallelGCThreadsConstraintFuncParallel(uint value, bool verbose) {
  // Parallel GC passes ParallelGCThreads when creating GrowableArray as 'int' type parameter.
  // So can't exceed with "max_jint"

  if (UseParallelGC && (value > (uint)max_jint)) {
    JVMFlag::printError(verbose,
                        "ParallelGCThreads (" UINT32_FORMAT ") must be "
                        "less than or equal to " UINT32_FORMAT " for Parallel GC\n",
                        value, max_jint);
    return JVMFlag::VIOLATES_CONSTRAINT;
  }
  return JVMFlag::SUCCESS;
}

JVMFlag::Error InitialTenuringThresholdConstraintFuncParallel(uintx value, bool verbose) {
  // InitialTenuringThreshold is only used for ParallelGC.
  if (UseParallelGC && (value > MaxTenuringThreshold)) {
      JVMFlag::printError(verbose,
                          "InitialTenuringThreshold (" UINTX_FORMAT ") must be "
                          "less than or equal to MaxTenuringThreshold (" UINTX_FORMAT ")\n",
                          value, MaxTenuringThreshold);
      return JVMFlag::VIOLATES_CONSTRAINT;
  }
  return JVMFlag::SUCCESS;
}

JVMFlag::Error MaxTenuringThresholdConstraintFuncParallel(uintx value, bool verbose) {
  // As only ParallelGC uses InitialTenuringThreshold,
  // we don't need to compare InitialTenuringThreshold with MaxTenuringThreshold.
  if (UseParallelGC && (value < InitialTenuringThreshold)) {
    JVMFlag::printError(verbose,
                        "MaxTenuringThreshold (" UINTX_FORMAT ") must be "
                        "greater than or equal to InitialTenuringThreshold (" UINTX_FORMAT ")\n",
                        value, InitialTenuringThreshold);
    return JVMFlag::VIOLATES_CONSTRAINT;
  }

  return JVMFlag::SUCCESS;
}