mpstat

Overview

The mpstat command reports processors related statistics. It shows CPU utilization for all CPUs or specific ones.

Syntax

mpstat [options] [interval [count]]

Common Options

Option Description
-A All CPU info
-P ALL All processors
-P list CPU list
-u CPU utilization
-I Interrupts info
-n Header once
-T Temperature
-V Version info
-o JSON JSON output
-N Node stats

Output Fields

Field Description
CPU Processor number
%usr User time
%nice Nice time
%sys System time
%iowait IO wait time
%irq Hardware interrupt
%soft Software interrupt
%steal Hypervisor time
%guest Virtual CPU time
%idle Idle time

Key Use Cases

  1. CPU monitoring
  2. Performance analysis
  3. Load balancing
  4. System tuning
  5. Troubleshooting

Examples with Explanations

Example 1: Basic Usage

mpstat

All CPU average

Example 2: Per CPU

mpstat -P ALL

All processors stats

Example 3: Interval

mpstat 2 5

Every 2s, 5 times

Common Usage Patterns

  1. All CPUs:

    mpstat -P ALL 1

  2. Specific CPU:

    mpstat -P 0

  3. With interrupts:

    mpstat -I ALL

Performance Metrics

  1. CPU usage
  2. System load
  3. Interrupt rates
  4. IO wait
  5. Idle time

Additional Resources

Best Practices

  1. Regular monitoring
  2. Check all CPUs
  3. Track trends
  4. Document baselines
  5. Compare cores

Performance Analysis

  1. CPU utilization
  2. Load distribution
  3. Interrupt handling
  4. System overhead
  5. Process impact

Troubleshooting

  1. High CPU usage
  2. Load imbalance
  3. Interrupt storms
  4. System overhead
  5. Process issues

Common Issues

  1. CPU saturation
  2. Uneven loads
  3. High interrupts
  4. System time
  5. Poor scaling