profiler command add dump action (alibaba#2622)

core/src/main/java/com/taobao/arthas/core/command/monitor200/ProfilerCommand.java

@@ -381,14 +381,16 @@ private AsyncProfiler profilerInstance() {
  }
 
  /**
- * https://github.com/jvm-profiling-tools/async-profiler/blob/v2.5/src/arguments.cpp#L50
- *
+ * https://github.com/async-profiler/async-profiler/blob/v2.9/profiler.sh#L154
  */
  public enum ProfilerAction {
- execute, start, stop, resume, list, version, status, load,
+ // start, resume, stop, dump, check, status, meminfo, list, collect,
+ start, resume, stop, dump, status, list,
+ version,
 
+ load,
+ execute,
  dumpCollapsed, dumpFlat, dumpTraces, getSamples,
-
  actions
  }
 
@@ -513,7 +515,7 @@ public void run() {
  //在异步线程执行，profiler命令已经结束，不能输出到客户端
  try {
  logger.info("stopping profiler ...");
- ProfilerModel model = processStop(asyncProfiler);
+ ProfilerModel model = processStop(asyncProfiler, ProfilerAction.stop);
  logger.info("profiler output file: " + model.getOutputFile());
  logger.info("stop profiler successfully.");
  } catch (Throwable e) {
@@ -524,7 +526,10 @@ public void run() {
  }
  process.appendResult(profilerModel);
  } else if (ProfilerAction.stop.equals(profilerAction)) {
- ProfilerModel profilerModel = processStop(asyncProfiler);
+ ProfilerModel profilerModel = processStop(asyncProfiler, profilerAction);
+ process.appendResult(profilerModel);
+ } else if (ProfilerAction.dump.equals(profilerAction)) {
+ ProfilerModel profilerModel = processStop(asyncProfiler, profilerAction);
  process.appendResult(profilerModel);
  } else if (ProfilerAction.resume.equals(profilerAction)) {
  String executeArgs = executeArgs(ProfilerAction.resume);
@@ -576,9 +581,9 @@ public void run() {
  }
  }
 
- private ProfilerModel processStop(AsyncProfiler asyncProfiler) throws IOException {
+ private ProfilerModel processStop(AsyncProfiler asyncProfiler, ProfilerAction profilerAction) throws IOException {
  String outputFile = outputFile();
- String executeArgs = executeArgs(ProfilerAction.stop);
+ String executeArgs = executeArgs(profilerAction);
  String result = execute(asyncProfiler, executeArgs);
 
  ProfilerModel profilerModel = createProfilerModel(result);

site/docs/doc/profiler.md

@@ -144,6 +144,15 @@ Started [cpu] profiling
 
 通过执行`profiler getSamples`可以查看 samples 的数量来验证。
 
+## Dump 分析结果
+
+```bash
+$ profiler dump
+OK
+```
+
+`dump` action 将性能分析的结果保存到默认文件或指定的文件中，但 profiling 过程不会停止。例如，如果使用 `start` action 启动 profiling，5 秒后执行 `dump` action，2 秒后再次执行 `dump` action，将会得到 2 个结果文件，第一个文件包括 0\~5 秒的分析结果，第二个文件包括 0\~7 秒的分析结果。
+
 ## 使用`execute`来执行复杂的命令
 
 比如开始采样：

site/docs/en/doc/profiler.md

@@ -144,6 +144,15 @@ The difference between `start` and `resume` is: `start` will clean existing resu
 
 You can verify the number of samples by executing `profiler getSamples`.
 
+## Dump action
+
+```bash
+$ profiler dump
+OK
+```
+
+The `dump` action saves profiling result to default file or specified file, but profiling will continue. That means if you start profiling and dump after 5 seconds, then dump after 2 seconds again, you will get 2 result files, the first one contains profiling result of 0\~5 seconds and the second one contains that of 0\~7 seconds.
+
 ## Use `execute` action to execute complex commands
 
 For example, start sampling: