pfqid

pfqid is a term that typically refers to a "process file query ID". In operating systems and software development, particularly in contexts related to process management and debugging, a pfqid serves as a unique identifier for a specific query or request made to the operating system about a running process. These queries might involve retrieving information such as the process's status, memory usage, open files, or execution state.

The purpose of a pfqid is to allow for the tracking and management of these information requests. When a system or an application needs to query a process, it might generate or be assigned a pfqid. This ID can then be used to reference that specific query in logs, for debugging purposes, or to correlate responses from the operating system with the initial request. Without such identifiers, it could become difficult to determine which query a particular piece of information pertains to, especially in systems where many processes are running and multiple queries are being made concurrently.

The exact implementation and usage of pfqid can vary depending on the specific operating system, kernel, or software framework. It is not a universally standardized term in the same way as, for example, a process ID (PID). However, the underlying concept of a unique identifier for a process-related query is a common pattern in system programming. Developers might encounter or use pfqid when working with low-level system calls, debugging tools, or performance monitoring utilities.