90 lines
3.1 KiB
Java
90 lines
3.1 KiB
Java
/*
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* Copyright (c) 2020, 2024, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2020, Datadog, Inc. All rights reserved.
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* Copyright (c) 2025 SAP SE. 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.settings;
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import static jdk.jfr.internal.util.TimespanUnit.SECONDS;
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import static jdk.jfr.internal.util.TimespanUnit.MILLISECONDS;
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import java.util.Objects;
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import java.util.Set;
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import jdk.jfr.Description;
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import jdk.jfr.SettingControl;
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import jdk.jfr.Label;
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import jdk.jfr.MetadataDefinition;
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import jdk.jfr.Name;
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import jdk.jfr.internal.PlatformEventType;
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import jdk.jfr.internal.Type;
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import jdk.jfr.internal.util.TimespanRate;
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import jdk.jfr.internal.util.Utils;
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@MetadataDefinition
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@Label("CPUThrottleSetting")
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@Description("Upper bounds the emission rate for CPU time samples")
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@Name(Type.SETTINGS_PREFIX + "Rate")
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public final class CPUThrottleSetting extends SettingControl {
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public static final String DEFAULT_VALUE = "0/s";
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private final PlatformEventType eventType;
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private String value = DEFAULT_VALUE;
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public CPUThrottleSetting(PlatformEventType eventType) {
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this.eventType = Objects.requireNonNull(eventType);
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}
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@Override
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public String combine(Set<String> values) {
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TimespanRate max = null;
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for (String value : values) {
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TimespanRate rate = TimespanRate.of(value);
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if (rate != null) {
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if (max == null || rate.isHigher(max)) {
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max = rate;
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}
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max = new TimespanRate(max.rate(), max.autoAdapt() || rate.autoAdapt());
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}
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}
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// "off" is not supported
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return Objects.requireNonNullElse(max.toString(), DEFAULT_VALUE);
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}
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@Override
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public void setValue(String value) {
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TimespanRate rate = TimespanRate.of(value);
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if (rate != null) {
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eventType.setCPUThrottle(rate);
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this.value = value;
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}
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}
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@Override
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public String getValue() {
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return value;
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}
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}
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