[PATCH 0/2] nohz_full: Offload task_tick to remote housekeeping cpus for nohz_full cpus

From: Vatika Harlalka
Date: Thu Aug 13 2015 - 05:25:36 EST

This patchset is for offloading task_tick() to a remote housekeeping
cpu. The larger aim is to stop ticks on nohz_full cpus. For this, extra
work must be done by housekeeping cpus. So, task_tick is called from a
delayed workqueue for nohz_full cpus and the work is requeued every second
for those nohz_full cpus whose ticks are stopped while they are busy. In
the rest of the cases it will lead to redundant accounting. To facilitate
this, a new function tick_nohz_remote_tick_stopped is added to indicate
whether ticks are stopped on a remote cpu.
Tick related code in core.c is moved to tick.c

Vatika Harlalka (2):
nohz_full: Move tick related code to tick.c
nohz_full: Offload task_tick to remote housekeeping cpu

include/linux/tick.h | 2 ++
kernel/sched/Makefile | 2 +-
kernel/sched/core.c | 27 ---------------
kernel/sched/tick.c | 85 ++++++++++++++++++++++++++++++++++++++++++++++++
kernel/time/tick-sched.c | 5 +++
5 files changed, 93 insertions(+), 28 deletions(-)
create mode 100644 kernel/sched/tick.c


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/