69 lines
2.5 KiB
Java
69 lines
2.5 KiB
Java
/*
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* Copyright (c) 2025 SAP SE. All rights reserved.
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* Copyright (c) 2024, 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. Oracle designates this
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* particular file as subject to the "Classpath" exception as provided
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* by Oracle in the LICENSE file that accompanied this code.
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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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package jdk.jfr.internal.util;
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import jdk.jfr.internal.settings.CPUThrottleSetting;
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/**
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* A rate or fixed period, see {@link jdk.jfr.internal.Rate}
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*/
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public record TimespanRate(double rate, boolean autoAdapt) {
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public static TimespanRate of(String text) {
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if (text.equals("off")) {
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text = CPUThrottleSetting.DEFAULT_VALUE;
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}
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boolean isPeriod = !text.contains("/");
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if (isPeriod) {
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var period = ValueParser.parseTimespanWithInfinity(text, Long.MAX_VALUE);
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if (period == Long.MAX_VALUE) {
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return null;
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}
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if (period == 0) {
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return new TimespanRate(0, false);
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}
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return new TimespanRate(Runtime.getRuntime().availableProcessors() / (period / 1_000_000_000.0), false);
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}
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Rate r = Rate.of(text);
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if (r == null) {
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return null;
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}
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return new TimespanRate(r.perSecond(), true);
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}
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public boolean isHigher(TimespanRate that) {
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return rate() > that.rate();
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}
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@Override
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public String toString() {
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if (autoAdapt) {
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return String.format("%d/ns", (long)(rate * 1_000_000_000L));
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}
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return String.format("%dns", (long)(Runtime.getRuntime().availableProcessors() / rate * 1_000_000_000L));
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}
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}
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