brendangregg

#!/usr/bin/python
#
# chaintest   Summarize off-CPU time by kernel stack + 2 waker stacks
#             WORK IN PROGRESS. For Linux, uses BCC, eBPF.
#
# USAGE: chaintest [-h] [-u] [-p PID] [-i INTERVAL] [-T] [duration]
#
# PLEASE DO NOT RUN THIS IN PRODUCTION! This is a work in progress, intended to
# explore chain graphs on Linux, using eBPF capabilities from a particular
# kernel version (4.3ish). This tool will eventually get much better.