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

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/share/vm/utilities/ticks.cpp	Wed Apr 27 01:25:04 2016 +0800
     1.3 @@ -0,0 +1,68 @@
     1.4 +/*
     1.5 + * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
     1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
     1.7 + *
     1.8 + * This code is free software; you can redistribute it and/or modify it
     1.9 + * under the terms of the GNU General Public License version 2 only, as
    1.10 + * published by the Free Software Foundation.
    1.11 + *
    1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
    1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    1.14 + * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    1.15 + * version 2 for more details (a copy is included in the LICENSE file that
    1.16 + * accompanied this code).
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License version
    1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
    1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
    1.21 + *
    1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
    1.23 + * or visit www.oracle.com if you need additional information or have any
    1.24 + * questions.
    1.25 + *
    1.26 + */
    1.27 +
    1.28 +#include "precompiled.hpp"
    1.29 +#include "runtime/os.hpp"
    1.30 +#include "utilities/ticks.inline.hpp"
    1.31 +
    1.32 +#ifdef ASSERT
    1.33 + const jlong Ticks::invalid_time_stamp = -2; // 0xFFFF FFFF`FFFF FFFE
    1.34 +#endif
    1.35 +
    1.36 +void Ticks::stamp() {
    1.37 +  _stamp_ticks = os::elapsed_counter();
    1.38 +}
    1.39 +
    1.40 +const Ticks Ticks::now() {
    1.41 +  Ticks t;
    1.42 +  t.stamp();
    1.43 +  return t;
    1.44 +}
    1.45 +
    1.46 +Tickspan::Tickspan(const Ticks& end, const Ticks& start) {
    1.47 +  assert(end.value() != Ticks::invalid_time_stamp, "end is unstamped!");
    1.48 +  assert(start.value() != Ticks::invalid_time_stamp, "start is unstamped!");
    1.49 +
    1.50 +  assert(end >= start, "negative time!");
    1.51 +
    1.52 +  _span_ticks = end.value() - start.value();
    1.53 +}
    1.54 +
    1.55 +template <typename ReturnType>
    1.56 +static ReturnType time_conversion(const Tickspan& span, TicksToTimeHelper::Unit unit) {
    1.57 +  assert(TicksToTimeHelper::SECONDS == unit ||
    1.58 +         TicksToTimeHelper::MILLISECONDS == unit, "invalid unit!");
    1.59 +
    1.60 +  ReturnType frequency_per_unit = (ReturnType)os::elapsed_frequency() / (ReturnType)unit;
    1.61 +
    1.62 +  return (ReturnType) ((ReturnType)span.value() / frequency_per_unit);
    1.63 +}
    1.64 +
    1.65 +double TicksToTimeHelper::seconds(const Tickspan& span) {
    1.66 +  return time_conversion<double>(span, SECONDS);
    1.67 +}
    1.68 +
    1.69 +jlong TicksToTimeHelper::milliseconds(const Tickspan& span) {
    1.70 +  return time_conversion<jlong>(span, MILLISECONDS);
    1.71 +}