title: Watch Where Socket Buffers are Freed in the Kernel
name: dropwatch.stp
version: 1.0
author: Neil Horman
keywords: network tracepoint buffer free
subsystem: network
status: production
exit: user-controlled
output: timed
scope: system-wide
description: Every five seconds the dropwatch.stp script lists the number of socket buffers freed at locations in the kernel.
test_support: stap -l 'kernel.trace("kfree_skb")'
test_check: stap -p4 dropwatch.stp
test_installcheck: stap dropwatch.stp -c "sleep 0.2"