Process & Resource Monitoring (Top/Htop/Ps/Systemd)

Analyzing Process Thread Activity with PIDstat

🧩 The Challenge

Standard monitoring tools often aggregate CPU usage for an entire process, making it difficult to pinpoint which individual thread within a multi-threaded application is consuming the most resources.

💡 The Fix

Use the sysstat suite to monitor and display individual thread-level statistics for a running process to identify bottlenecks in concurrent tasks.

pidstat -t -p <PID> 1

⚙️ Why It Works

The -t flag instructs the process statistics reporter to include threads in the output, while the -p option filters the results to a specific process ID, providing a per-thread breakdown updated every second.

🚀 Pro-Tip: Install the sysstat package if pidstat is missing, and use the -u flag to focus exclusively on CPU usage metrics for those threads.

Linux Tips & Tricks | © ngelinux.com | 7/10/2026