Method and apparatus to locate bottleneck of java program

An apparatus to locate a bottleneck of Java program comprising:

• means configured to create a helper thread in a Java process corresponding to a Java program and attaching the helper thread to a Java virtual machine (JVM) created in the Java process;
• means configured to insert a prober into an operating system kernel;
• means configured to monitor states in the operating system kernel, of Java threads in the Java process, and sending a signal to the helper thread in response to detect that a Java thread is blocked, by the prober;
• and
• means configured to retrieve call stack information from the JVM in response to receive the signal from the operating system kernel and locating the position in source code of the Java program that causes the block using to the retrieved call stack information, in the helper thread.

An article of manufacture tangibly embodying computer readable instructions which, when implemented, cause a computer to carry out the steps of a method comprising:

• creating a helper thread in a Java process corresponding to the Java program, and attaching the helper thread to a Java virtual machine (JVM) created in the Java process;
• inserting a prober into an operating system kernel;
• monitoring states in the operating system kernel, of Java threads in the Java process, and sending a signal to the helper thread in response to detect that a Java thread is blocked, wherein the monitoring is performed by the prober;
• and
• retrieving, with the helper thread, call stack information from the JVM in response to receive the signal from the operating system kernel and locating the position in source code of the Java program that causes the block using to the retrieved call stack information.