title: Monitor Changes in Processor Executing a Task
name: chng_cpu.stp
version: 1.0
author: Ankita Garg at IBM
keywords: scheduler
subsystem: scheduler
status: production
exit: user-controlled
output: trace
scope: pid
description: The chng_cpu.stp script takes an argument which is the executable name of the task it should monitor. Each time a task with that executable name is found running on a different processor, the script prints out the thread id (tid), the executable name, the processor now running the task, the thread state, and a backtrace showing the kernel functions that triggered the running of the task on the processor.
arg_1: The name of the executable to monitor
test_check: stap -p4 chng_cpu.stp bash
test_installcheck: stap chng_cpu.stp -c "sleep 0.2" bash