Menu
I'm having an issue in my Java application where the JIT breaks the code. If I disable the JIT, everything works fine, but runs 10-20x slower.
Is there any way to disable the JIT for a specific method or class?
Edit: I'm using Ubuntu 10.10, getting the same results both with:
OpenJDK Runtime Environment (IcedTea6 1.9) (6b20-1.9-0ubuntu1)
OpenJDK 64-Bit Server VM (build 17.0-b16, mixed mode)
and:
Java(TM) SE Runtime Environment (build 1.6.0_16-b01)
Java HotSpot(TM) 64-Bit Server VM (build 14.2-b01, mixed mode)
434
disable() method is available in java. lang package. disable() method is used to cause the compiler to stop operation. disable() method is a static method, it is accessible with the class name and if we try to access the method with the class object then we will not get any error.
There are two main compilation strategies in Java: Just in Time Compilation (JIT) and Ahead of Time Compilation (AOT). The first generates machine code during the execution of the program itself (i.e., shortly before the first invocation of a Java method).
Without the JIT, the VM has to interpret the bytecodes itself - a process that requires extra CPU and memory. The JIT compiler doesn't compile every method that gets called because thousands of methods can be called at startup.
The following option works on my JVMs, to exclude a specific method:
-X:CompileCommand=exclude,the/package/and/Class,methodName
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With