PiP_Process-in-Process

PiP is a user-level library to have the best of the both worlds of multi-process and multi-thread parallel execution models. PiP allows a process to create sub-processes into the same virtual address space where the parent process runs. The parent process and sub-processes share the same address space, however, each process has its own variable set. So, each process runs independently from the other process. If some or all processes agree, then data own by a process can be accessed by the other processes. Those processes share the same address space, just like pthreads, and each process has its own variables like a process. The parent process is called PiP process and a sub-process are called a PiP task.

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