smiklosovic commented on code in PR #4487: URL: https://github.com/apache/cassandra/pull/4487#discussion_r2556088005
########## src/java/org/apache/cassandra/tools/nodetool/Profile.java: ########## @@ -0,0 +1,122 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.cassandra.tools.nodetool; + +import java.time.ZoneId; +import java.time.format.DateTimeFormatter; + +import org.apache.cassandra.tools.NodeProbe; +import org.apache.cassandra.profiler.AsyncProfilerMBean; + +import org.apache.cassandra.utils.FBUtilities; +import picocli.CommandLine.Command; +import picocli.CommandLine.Option; + +@Command(name = "profile", description = "Manage Async-Profiler on the cassandra process", + subcommands = { + Profile.Start.class, + Profile.Stop.class, + Profile.Raw.class + }) +public class Profile extends AbstractCommand +{ + @Override + public void execute(NodeProbe probe) { + AbstractCommand cmd = new Start(); + cmd.probe(probe); + cmd.logger(output); + cmd.run(); + } + + @Command(name = "start", description = "Run Async-Profiler on the cassandra process") + public static class Start extends AbstractCommand + { + + @Option(names = {"-e", "--event"}, description = "Event to profile (cpu, alloc, lock, wall, etc.)") + public String event = "cpu"; + + @Option(names = {"-o", "--output"}, description = "File Name") + public String filename = DateTimeFormatter.ofPattern("yyyy-MM-dd-HH-mm-ss") + .withZone(ZoneId.systemDefault()).format(FBUtilities.now()) + ".html"; + + @Option(names = {"-t", "--timeout"}, description = "Timeout in seconds") + public int timeout = 60; + + @Option(names = {"-f", "--format"}, description = "Output format (flamegraph, tree, traces, etc.)") + public String outputFormat = "flamegraph"; + + @Override + protected void execute(NodeProbe probe) + { + AsyncProfilerMBean profiler = probe.getAsyncProfilerProxy(); + + if (!profiler.isAvailable()) { + System.err.println("Async-profiler native library is not loaded or unavailable."); + return; Review Comment: I would prefer `System.exit(-1);` ########## src/java/org/apache/cassandra/tools/nodetool/Profile.java: ########## @@ -0,0 +1,122 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +package org.apache.cassandra.tools.nodetool; + +import java.time.ZoneId; +import java.time.format.DateTimeFormatter; + +import org.apache.cassandra.tools.NodeProbe; +import org.apache.cassandra.profiler.AsyncProfilerMBean; + +import org.apache.cassandra.utils.FBUtilities; +import picocli.CommandLine.Command; +import picocli.CommandLine.Option; + +@Command(name = "profile", description = "Manage Async-Profiler on the cassandra process", + subcommands = { + Profile.Start.class, + Profile.Stop.class, + Profile.Raw.class + }) +public class Profile extends AbstractCommand +{ + @Override + public void execute(NodeProbe probe) { + AbstractCommand cmd = new Start(); + cmd.probe(probe); + cmd.logger(output); + cmd.run(); + } + + @Command(name = "start", description = "Run Async-Profiler on the cassandra process") + public static class Start extends AbstractCommand + { + + @Option(names = {"-e", "--event"}, description = "Event to profile (cpu, alloc, lock, wall, etc.)") + public String event = "cpu"; + + @Option(names = {"-o", "--output"}, description = "File Name") + public String filename = DateTimeFormatter.ofPattern("yyyy-MM-dd-HH-mm-ss") + .withZone(ZoneId.systemDefault()).format(FBUtilities.now()) + ".html"; + + @Option(names = {"-t", "--timeout"}, description = "Timeout in seconds") + public int timeout = 60; + + @Option(names = {"-f", "--format"}, description = "Output format (flamegraph, tree, traces, etc.)") + public String outputFormat = "flamegraph"; + + @Override + protected void execute(NodeProbe probe) + { + AsyncProfilerMBean profiler = probe.getAsyncProfilerProxy(); + + if (!profiler.isAvailable()) { + System.err.println("Async-profiler native library is not loaded or unavailable."); + return; + } + + System.out.printf("Starting async-profiler: event=%s, format=%s\n", event, outputFormat); + profiler.start(event, outputFormat, timeout, filename); + } + } + + @Command(name = "stop", description = "Stop Async-Profiler on the cassandra process") Review Comment: on a Cassandra process -- This is an automated message from the Apache Git Service. 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