About Java Parallel Program development focus

Recently in the use of Hadoop to do distributed operations, and also the Java Parallel Computing framework for review, the special summary of experience.

Java's Parallel computing framework is the FORK/JOIN model, and the usage pattern is simple, focusing on the key factors involved.

The first is the times, the number of runs, the number of times per second.

The second is speedups and task rates, which is the acceleration and the frequency of tasks performed per second.

The third is garbage Collection, which is the efficiency of GC recovery.

The Forth is memory locality and bandwidth, which is concerned with the use of memory.

The five is task synchronization, which is the effect of synchronization on performance.

Task locality is the localization of tasks.