jdk8-mips64-public/hotspot: comparison src/share/vm/interpreter/invocationCounter.cpp

--1:000000000000
+:f90c822e73f8
+/*
+* Copyright (c) 1997, 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 "interpreter/invocationCounter.hpp"
+#include "runtime/frame.hpp"
+#include "runtime/handles.inline.hpp"
+// Implementation of InvocationCounter
+void InvocationCounter::init() {
+_counter = 0;  // reset all the bits, including the sticky carry
+reset();
+}
+void InvocationCounter::reset() {
+// Only reset the state and don't make the method look like it's never
+// been executed
+set_state(wait_for_compile);
+}
+void InvocationCounter::set_carry() {
+set_carry_flag();
+// The carry bit now indicates that this counter had achieved a very
+// large value.  Now reduce the value, so that the method can be
+// executed many more times before re-entering the VM.
+int old_count = count();
+int new_count = MIN2(old_count, (int) (CompileThreshold / 2));
+// prevent from going to zero, to distinguish from never-executed methods
+if (new_count == 0)  new_count = 1;
+if (old_count != new_count)  set(state(), new_count);
+}
+void InvocationCounter::set_state(State state) {
+assert(0 <= state && state < number_of_states, "illegal state");
+int init = _init[state];
+// prevent from going to zero, to distinguish from never-executed methods
+if (init == 0 && count() > 0)  init = 1;
+int carry = (_counter & carry_mask);    // the carry bit is sticky
+_counter = (init << number_of_noncount_bits) | carry | state;
+}
+void InvocationCounter::print() {
+tty->print_cr("invocation count: up = %d, limit = %d, carry = %s, state = %s",
+count(), limit(),
+carry() ? "true" : "false",
+state_as_string(state()));
+}
+void InvocationCounter::print_short() {
+tty->print(" [%d%s;%s]", count(), carry()?"+carry":"", state_as_short_string(state()));
+}
+// Initialization
+int                       InvocationCounter::_init  [InvocationCounter::number_of_states];
+InvocationCounter::Action InvocationCounter::_action[InvocationCounter::number_of_states];
+int                       InvocationCounter::InterpreterInvocationLimit;
+int                       InvocationCounter::InterpreterBackwardBranchLimit;
+int                       InvocationCounter::InterpreterProfileLimit;
+const char* InvocationCounter::state_as_string(State state) {
+switch (state) {
+case wait_for_nothing            : return "wait_for_nothing";
+case wait_for_compile            : return "wait_for_compile";
+}
+ShouldNotReachHere();
+return NULL;
+}
+const char* InvocationCounter::state_as_short_string(State state) {
+switch (state) {
+case wait_for_nothing            : return "not comp.";
+case wait_for_compile            : return "compileable";
+}
+ShouldNotReachHere();
+return NULL;
+}
+static address do_nothing(methodHandle method, TRAPS) {
+// dummy action for inactive invocation counters
+MethodCounters* mcs = method->method_counters();
+assert(mcs != NULL, "");
+mcs->invocation_counter()->set_carry();
+mcs->invocation_counter()->set_state(InvocationCounter::wait_for_nothing);
+return NULL;
+}
+static address do_decay(methodHandle method, TRAPS) {
+// decay invocation counters so compilation gets delayed
+MethodCounters* mcs = method->method_counters();
+assert(mcs != NULL, "");
+mcs->invocation_counter()->decay();
+return NULL;
+}
+void InvocationCounter::def(State state, int init, Action action) {
+assert(0 <= state && state < number_of_states, "illegal state");
+assert(0 <= init  && init  < count_limit, "initial value out of range");
+_init  [state] = init;
+_action[state] = action;
+}
+address dummy_invocation_counter_overflow(methodHandle m, TRAPS) {
+ShouldNotReachHere();
+return NULL;
+}
+void InvocationCounter::reinitialize(bool delay_overflow) {
+// define states
+guarantee((int)number_of_states <= (int)state_limit, "adjust number_of_state_bits");
+def(wait_for_nothing, 0, do_nothing);
+if (delay_overflow) {
+def(wait_for_compile, 0, do_decay);
+} else {
+def(wait_for_compile, 0, dummy_invocation_counter_overflow);
+}
+InterpreterInvocationLimit = CompileThreshold << number_of_noncount_bits;
+InterpreterProfileLimit = ((CompileThreshold * InterpreterProfilePercentage) / 100)<< number_of_noncount_bits;
+// When methodData is collected, the backward branch limit is compared against a
+// methodData counter, rather than an InvocationCounter.  In the former case, we
+// don't need the shift by number_of_noncount_bits, but we do need to adjust
+// the factor by which we scale the threshold.
+if (ProfileInterpreter) {
+InterpreterBackwardBranchLimit = (CompileThreshold * (OnStackReplacePercentage - InterpreterProfilePercentage)) / 100;
+} else {
+InterpreterBackwardBranchLimit = ((CompileThreshold * OnStackReplacePercentage) / 100) << number_of_noncount_bits;
+}
+assert(0 <= InterpreterBackwardBranchLimit,
+"OSR threshold should be non-negative");
+assert(0 <= InterpreterProfileLimit &&
+InterpreterProfileLimit <= InterpreterInvocationLimit,
+"profile threshold should be less than the compilation threshold "
+"and non-negative");
+}
+void invocationCounter_init() {
+InvocationCounter::reinitialize(DelayCompilationDuringStartup);
+}

Mercurial > jdk8-mips64-public > hotspot / file comparison

comparison: src/share/vm/interpreter/invocationCounter.cpp

src/share/vm/interpreter/invocationCounter.cpp