| /* |
| * Copyright (c) 2011, 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 "jfr/utilities/jfrTimeConverter.hpp" |
| #include "jfr/utilities/jfrTime.hpp" |
| #include "runtime/os.hpp" |
| |
| #include OS_HEADER_INLINE(os) |
| |
| static double ft_counter_to_nanos_factor = .0; |
| static double nanos_to_ft_counter_factor = .0; |
| static double os_counter_to_nanos_factor = .0; |
| static double nanos_to_os_counter_factor = .0; |
| |
| const double JfrTimeConverter::NANOS_PER_SEC = 1000000000.0; |
| const double JfrTimeConverter::NANOS_PER_MILLISEC = 1000000.0; |
| const double JfrTimeConverter::NANOS_PER_MICROSEC = 1000.0; |
| |
| static bool initialized = false; |
| |
| void JfrTimeConverter::initialize() { |
| if (!initialized) { |
| nanos_to_os_counter_factor = (double)os::elapsed_frequency() / NANOS_PER_SEC; |
| assert(nanos_to_os_counter_factor != .0, "error in conversion!"); |
| os_counter_to_nanos_factor = (double)1.0 / nanos_to_os_counter_factor; |
| assert(os_counter_to_nanos_factor != .0, "error in conversion!"); |
| if (JfrTime::is_ft_enabled()) { |
| nanos_to_ft_counter_factor = (double)JfrTime::frequency() / NANOS_PER_SEC; |
| assert(nanos_to_ft_counter_factor != .0, "error in conversion!"); |
| ft_counter_to_nanos_factor = (double)1.0 / nanos_to_ft_counter_factor; |
| assert(ft_counter_to_nanos_factor != .0, "error in conversion!"); |
| } |
| initialized = true; |
| } |
| } |
| |
| double JfrTimeConverter::counter_to_nano_multiplier(bool is_os_time) { |
| if (!initialized) { |
| initialize(); |
| } |
| return JfrTime::is_ft_enabled() && !is_os_time ? ft_counter_to_nanos_factor : os_counter_to_nanos_factor; |
| } |
| |
| double JfrTimeConverter::nano_to_counter_multiplier(bool is_os_time) { |
| if (!initialized) { |
| initialize(); |
| } |
| return JfrTime::is_ft_enabled() && !is_os_time ? nanos_to_ft_counter_factor : nanos_to_os_counter_factor; |
| } |
| |
| double JfrTimeConverter::counter_to_nanos_internal(jlong c, bool is_os_time) { |
| return (double)c * counter_to_nano_multiplier(is_os_time); |
| } |
| |
| double JfrTimeConverter::counter_to_millis_internal(jlong c, bool is_os_time) { |
| return (counter_to_nanos_internal(c, is_os_time) / NANOS_PER_MILLISEC); |
| } |
| |
| jlong JfrTimeConverter::counter_to_nanos(jlong c, bool is_os_time) { |
| return (jlong)counter_to_nanos_internal(c, is_os_time); |
| } |
| |
| jlong JfrTimeConverter::counter_to_millis(jlong c, bool is_os_time) { |
| return (jlong)counter_to_millis_internal(c, is_os_time); |
| } |
| |
| jlong JfrTimeConverter::nanos_to_countertime(jlong nanos, bool as_os_time) { |
| return nanos <= 0 ? 0 : (jlong)((double)nanos * nano_to_counter_multiplier(as_os_time)); |
| } |