8234740: Harmonize parameter order in Atomic - cmpxchg
Reviewed-by: rehn, dholmes
/*
* Copyright (c) 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 "runtime/os.hpp"
#include "utilities/ostream.hpp"
#include "utilities/spinYield.hpp"
SpinYield::SpinYield(uint spin_limit, uint yield_limit, uint sleep_ns) :
_sleep_time(),
_spins(0),
_yields(0),
_spin_limit(os::is_MP() ? spin_limit : 0),
_yield_limit(yield_limit),
_sleep_ns(sleep_ns)
{}
void SpinYield::yield_or_sleep() {
if (_yields < _yield_limit) {
++_yields;
os::naked_yield();
} else {
Ticks sleep_start = Ticks::now();
os::naked_short_nanosleep(_sleep_ns);
_sleep_time += Ticks::now() - sleep_start;
}
}
static const char* print_separator(outputStream* s, const char* separator) {
s->print("%s", separator);
return ", ";
}
void SpinYield::report(outputStream* s) const {
const char* initial_separator = "";
const char* separator = initial_separator;
if (_spins > 0) { // Report spins, if any.
separator = print_separator(s, separator);
s->print("spins = %u", _spins);
}
if (_yields > 0) { // Report yields, if any.
separator = print_separator(s, separator);
s->print("yields = %u", _yields);
}
if (_sleep_time.value() != 0) { // Report sleep duration, if slept.
separator = print_separator(s, separator);
s->print("sleep = " UINT64_FORMAT " usecs",
_sleep_time.milliseconds());
}
if (separator == initial_separator) {
s->print("no waiting");
}
}