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I am trying to check the performance of a program. I refer this post get OS-level system information. When Runtime.availableProcessors() executes, I get an answer of 4. I read availableProcessors() but it tells that this method returns number of processors
I am using Windows 7 core i5 4gp.
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getRuntime. public static Runtime getRuntime() Returns the runtime object associated with the current Java application. Most of the methods of class Runtime are instance methods and must be invoked with respect to the current runtime object.
Runtime. getRuntime. availableProcessors to get the number of cores per node.
The Java Runtime Environment, or JRE, is a software layer that runs on top of a computer's operating system software and provides the class libraries and other resources that a specific Java program needs to run.
The getParallelism() method of ForkJoinPool class is used to get the parallelism level of the common Pool. It returns an integer value representing the parallelism level.
As you've read, availableProcessors() is a method that returns the number of processors available to the JVM. 4 means the number of processors currently available for JVM.
These lines return the number of logical cores on Windows and in other operating systems.
On a computer with a quad-core Core i7 supporting Hyper-Threading, it will return 8.
On a computer with a quad-core Q6700, this method will return 4.
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