linux/samples/bpf/offwaketime_user.c, branch v4.9Mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
https://git.shady.money/linux/atom?h=v4.92016-03-08T20:28:32Zsamples/bpf: move ksym_search() into library2016-03-08T20:28:32ZAlexei Starovoitovast@fb.com2016-03-08T05:57:19Zurn:sha1:3622e7e4935105991dc648bca650c858576aecda
move ksym search from offwaketime into library to be reused
in other tests
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
samples/bpf: offwaketime example2016-02-20T05:21:44ZAlexei Starovoitovast@fb.com2016-02-18T03:58:59Zurn:sha1:a6ffe7b9df6228d11c5689914eceb488bc4e38df
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>