性能分析工具-火焰图

• 采用 https://github.com/jvm-profiling-tools/async-profiler 进行性能分析

• 实现步骤:
  1. 下载: https://github.com/jvm-profiling-tools/async-profiler
  2. 自动解压

    public class CpuAsyncProfilerTest {
        public static void main(String[] args) throws InterruptedException {
            while (true) {
                CpuAsyncTask cpuAsyncTask = new CpuAsyncTask();
                cpuAsyncTask.run();
            }
        }
  
        public static void aTest() throws InterruptedException {
            Thread.sleep(10);
            bTest();
            cTest();
        }
  
        public static void bTest() throws InterruptedException {
            Thread.sleep(10);
            cTest();
        }
        public static void cTest() throws InterruptedException {
            Thread.sleep(10);
        }
    }
    class CpuAsyncTask implements Runnable {
  
        @Override
        public void run() {
            try {
                while (true) {
                    aTest();
                }
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
  

  1. jps 找到程序的运行pid
  2. 生产火焰图命令 ./profiler.sh -d 30 -f flamegraph.svg 43619

• 

• 资料
  • http://www.ruanyifeng.com/blog/2017/09/flame-graph.html
  • https://queue.acm.org/detail.cfm?id=2927301
  • http://www.brendangregg.com/flamegraphs.html
  • http://www.brendangregg.com/
  • https://github.com/jvm-profiling-tools/async-profiler