Cpulimit limits the CPU usage of a process, expressed as a percentage. It addresses the problem of uncontrolled CPU consumption by batch jobs, preventing them from monopolizing system resources. The tool works by sending SIGSTOP and SIGCONT signals to manage CPU usage. It is written in C.
Cpulimit directly limits CPU usage, bypassing standard process scheduling mechanisms. It dynamically adjusts to system load, ensuring consistent resource allocation. The tool provides a simple command-line interface for easy usage and integration.
- CPU Percentage Limiting: Restricts the CPU usage of a process to a specified percentage.
- Dynamic System Load Adaptation: Adapts to overall system load for efficient CPU control.
- Signal-Based Control: Uses POSIX signals (SIGSTOP, SIGCONT) to manage process CPU usage.
- Simple Command-Line Interface: Offers a straightforward command-line interface for ease of use.
- Cross-Platform Compatibility: Available for Linux and FreeBSD.
- Process Group Control: Applies CPU limits to a process and its child processes.
- Source Code Availability: Open-source with readily available source code for modification.
Cpulimit appears to be a mature project with a history dating back to 2012 and recent commits in July 2024. It has a moderate number of stars and forks, indicating community interest. The project includes unit tests. However, the documentation is minimal.
System administrators and developers benefit from Cpulimit to manage CPU resource allocation for various processes. It's valuable for controlling batch jobs, ensuring fair resource distribution, and preventing runaway processes from consuming excessive CPU cycles. It provides a direct and effective alternative to relying solely on process priorities.