function::cpu - Linux
Overview
function::cpu is a command-line tool that provides real-time information about CPU usage on Linux systems. It monitors and displays per-core and aggregate CPU utilization, making it valuable for system performance analysis and debugging.
Syntax
function::cpu [-h] [-V] [-s <sample_rate>]
Options/Flags
- -h, –help: Display command usage information.
- -V, –version: Print the version of function::cpu.
- -s, –sample_rate
: Set the sampling interval in seconds. Default: 1 second.
Examples
Simple Usage:
Monitor CPU usage in real-time:
function::cpu
Detailed Output:
Display per-core and aggregate CPU usage statistics:
function::cpu -s 5
Integration with Other Commands:
Extract specific CPU metrics into a variable for further processing:
average_cpu=$(function::cpu -s 10 | tail -n1 | awk '{print $2}')
Common Issues
Error Message: "command not found"
Ensure that function::cpu is installed and in the system’s $PATH environment variable.
Incorrect Sampling Interval:
Using a sample rate that is too frequent can overload the system. Adjust the -s option to avoid excessive CPU consumption.
Integration
System Monitoring:
function::cpu can be integrated with other system monitoring tools, such as Prometheus or Grafana, to provide real-time CPU utilization data for analysis and visualization.
Performance Profiling:
Use function::cpu in conjunction with performance profiling tools like Valgrind or perf to identify performance bottlenecks related to CPU usage.
Related Commands
- top: Display a real-time view of system processes and CPU usage.
- mpstat: Provide detailed CPU statistics for each CPU core.
- sar: Collect and report system activity, including CPU utilization.