Isuru's Blog

My first Hackernoon story was published today. The story is " Profiling Java Applications with Async Profiler " With " Async Profiler ", both system code paths and Java code paths can be profiled with the help of AsyncGetCallTrace (an internal HotSpot JVM API) and perf_events . Async profiler supports several types of profiling. For example, CPU profiling Allocation profiling Wall-clock profiling Lock profiling The Hackernoon story demonstrates few examples of using Async Profiler and generating Flame Graphs as the output.

There are many posts on this topic if you search on Google. This post just explains the steps I use to install JDK 7 on my laptop. Download the JDK from Oracle. The latest version as of now is Java SE 7u51. I'm on 64-bit machine, therefore I downloaded jdk-7u51-linux-x64 .tar.gz It's easy to get the tar.gz package as we just have to extract the JDK. I usually extract the JDK to /usr/lib/jvm directory. sudo mkdir -p /usr/lib/jvm cd /usr/lib/jvm/ sudo tar -xf ~/Software/jdk-7u51-linux-x64.tar.gz sudo update-alternatives --install "/usr/bin/javac" "javac" "/usr/lib/jvm/jdk1.7.0_51/bin/javac" 1 sudo update-alternatives --install "/usr/bin/java" "java" "/usr/lib/jvm/jdk1.7.0_51/bin/java" 1 sudo update-alternatives --install "/usr/lib/mozilla/plugins/libjavaplugin.so" "mozilla-javaplugin.so" "/usr/lib/jvm/jdk1.7.0_51/jre/lib/amd64/libnpjp2.so" 1 sudo update-alternatives --install ...