[PATCH 0/4] sched: Display deadline bandwidth and other SCHED_DEBUG clean up

Steven Rostedt
2016-02-22T21:29:21Z

[ Nothing different since my v2 I posted, except hopefully people
will look at it this time :-) I also removed the RFC ]

I'm starting to play with SCHED_DEADLINE a bit and I'm able to cause
a bandwidth "leak". Then I realized there's no way to examine what bandwidths
are enabled on which CPUs. I added the bandwith ratios to the
/proc/sched_debug file.

I will be posting the SCHED_DEADLINE issue in a separate thread.

# grep dl /proc/sched_debug
dl_rq[0]:
.dl_nr_running : 0
.dl_bw->bw : 996147
.dl_bw->total_bw : 0
dl_rq[1]:
.dl_nr_running : 0
.dl_bw->bw : 996147
.dl_bw->total_bw : 104857
dl_rq[2]:
.dl_nr_running : 0
.dl_bw->bw : 996147
.dl_bw->total_bw : 0
dl_rq[3]:
.dl_nr_running : 0
.dl_bw->bw : 996147
.dl_bw->total_bw : 0
dl_rq[4]:
.dl_nr_running : 0
.dl_bw->bw : 996147
.dl_bw->total_bw : 0
dl_rq[5]:
.dl_nr_running : 0
.dl_bw->bw : 996147
.dl_bw->total_bw : 0
dl_rq[6]:
.dl_nr_running : 0
.dl_bw->bw : 996147
.dl_bw->total_bw : 0
dl_rq[7]:
.dl_nr_running : 0
.dl_bw->bw : 996147
.dl_bw->total_bw : 0

Before adding this code, I also realized there was a bit of
SCHED_DEBUG code in the kernel/sched/core.c file, and decided to move that
to kernel/sched/debug.c to clean the core.c file up a bit. Those patches
are mostly orthognal to the deadline_bw file, but decided to group them
together here.

Steven Rostedt (Red Hat) (4):
sched: Move sched_feature file setup into debug.c
sched: Move sched_domain_sysctl to debug.c
sched: Add bandwidth ratio to /proc/sched_debug
tracing: Add __print_ns_to_secs() and __print_ns_without_secs() helpers

----
include/trace/trace_events.h | 25 ++++
kernel/sched/core.c | 311 ------------------------------------------
kernel/sched/debug.c | 313 +++++++++++++++++++++++++++++++++++++++++++
kernel/sched/sched.h | 13 ++
4 files changed, 351 insertions(+), 311 deletions(-)