tree ec8f20a73795ff16ed02887eb72870eeeee186a8
parent d5a3b1f691865be576c2bffa708549b8cdccda19
author Alexei Starovoitov <ast@fb.com> 1455767939 -0800
committer David S. Miller <davem@davemloft.net> 1455945704 -0500

samples/bpf: offwaketime example

This is simplified version of Brendan Gregg's offwaketime:
This program shows kernel stack traces and task names that were blocked and
"off-CPU", along with the stack traces and task names for the threads that woke
them, and the total elapsed time from when they blocked to when they were woken
up. The combined stacks, task names, and total time is summarized in kernel
context for efficiency.

Example:
$ sudo ./offwaketime | flamegraph.pl > demo.svg
Open demo.svg in the browser as FlameGraph visualization.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>