cpuload

cpuload is a command-line utility commonly found on Unix-like operating systems, including Linux and macOS. Its primary purpose is to display the current CPU load average of the system. The load average represents the average number of processes that are either running or waiting to run over specific time intervals. Typically, cpuload displays three values corresponding to the average load over the last 1, 5, and 15 minutes.

Understanding the load average provided by cpuload can offer insights into system performance. A load average of 1.00 on a single-core CPU indicates that the CPU is fully utilized, with one process actively running and no processes waiting. On a multi-core system, a load average of 1.00 per core suggests full utilization. For example, on a 4-core system, a load average of 4.00 would indicate that, on average, all four cores are busy.

Higher load averages, significantly exceeding the number of CPU cores, generally suggest that the system is overloaded and may be experiencing performance degradation. This can be due to a high number of running processes, intensive applications, or resource contention. Conversely, a consistently low load average, well below the number of cores, might indicate that the CPU has spare capacity.

cpuload is often used by system administrators and users for quick monitoring of system activity and to diagnose potential performance bottlenecks. It's a simple yet effective tool for getting a snapshot of how busy the CPU is at any given moment.