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title: Tally the Number of User-Space QEMU IO on Each IO Port
name: qemu_io.stp
version: 1.0
author: William Cohen
keywords: virtualization qemu kvm io
subsystem: virtualization
status: experimental
exit: user-controlled
output: sorted-list
scope: system-wide
description: The qemu_io.stp script tallies the number of times each of the IO port on the guest virtual machines is touched by a input or output operation. When the script exits, it prints a count of the number of times each IO port read and written.
test_support: stap -l 'qemu.*.*.cpu_in?, qemu.kvm.cpu_in?' && stap -l 'qemu.*.*.cpu_out?, qemu.kvm.cpu_out?'
test_check: stap -p4 qemu_io.stp
test_installcheck: stap qemu_io.stp -T 1