a060be188d
Co-authored-by: Markus Gronlund <markus.gronlund@oracle.com> Reviewed-by: coleenp, ihse, erikj, dsamersoff, mseledtsov, egahlin, mgronlun
92 lines
3.5 KiB
C++
92 lines
3.5 KiB
C++
/*
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* Copyright (c) 2011, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "jfr/utilities/jfrTimeConverter.hpp"
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#include "jfr/utilities/jfrTime.hpp"
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#include "runtime/os.hpp"
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#include OS_HEADER_INLINE(os)
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static double ft_counter_to_nanos_factor = .0;
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static double nanos_to_ft_counter_factor = .0;
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static double os_counter_to_nanos_factor = .0;
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static double nanos_to_os_counter_factor = .0;
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const double JfrTimeConverter::NANOS_PER_SEC = 1000000000.0;
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const double JfrTimeConverter::NANOS_PER_MILLISEC = 1000000.0;
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const double JfrTimeConverter::NANOS_PER_MICROSEC = 1000.0;
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static bool initialized = false;
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void JfrTimeConverter::initialize() {
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if (!initialized) {
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nanos_to_os_counter_factor = (double)os::elapsed_frequency() / NANOS_PER_SEC;
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assert(nanos_to_os_counter_factor != .0, "error in conversion!");
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os_counter_to_nanos_factor = (double)1.0 / nanos_to_os_counter_factor;
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assert(os_counter_to_nanos_factor != .0, "error in conversion!");
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if (JfrTime::is_ft_enabled()) {
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nanos_to_ft_counter_factor = (double)JfrTime::frequency() / NANOS_PER_SEC;
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assert(nanos_to_ft_counter_factor != .0, "error in conversion!");
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ft_counter_to_nanos_factor = (double)1.0 / nanos_to_ft_counter_factor;
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assert(ft_counter_to_nanos_factor != .0, "error in conversion!");
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}
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initialized = true;
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}
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}
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double JfrTimeConverter::counter_to_nano_multiplier(bool is_os_time) {
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if (!initialized) {
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initialize();
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}
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return JfrTime::is_ft_enabled() && !is_os_time ? ft_counter_to_nanos_factor : os_counter_to_nanos_factor;
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}
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double JfrTimeConverter::nano_to_counter_multiplier(bool is_os_time) {
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if (!initialized) {
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initialize();
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}
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return JfrTime::is_ft_enabled() && !is_os_time ? nanos_to_ft_counter_factor : nanos_to_os_counter_factor;
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}
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double JfrTimeConverter::counter_to_nanos_internal(jlong c, bool is_os_time) {
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return (double)c * counter_to_nano_multiplier(is_os_time);
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}
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double JfrTimeConverter::counter_to_millis_internal(jlong c, bool is_os_time) {
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return (counter_to_nanos_internal(c, is_os_time) / NANOS_PER_MILLISEC);
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}
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jlong JfrTimeConverter::counter_to_nanos(jlong c, bool is_os_time) {
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return (jlong)counter_to_nanos_internal(c, is_os_time);
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}
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jlong JfrTimeConverter::counter_to_millis(jlong c, bool is_os_time) {
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return (jlong)counter_to_millis_internal(c, is_os_time);
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}
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jlong JfrTimeConverter::nanos_to_countertime(jlong nanos, bool as_os_time) {
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return nanos <= 0 ? 0 : (jlong)((double)nanos * nano_to_counter_multiplier(as_os_time));
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}
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