Messages in this thread | | | Date | Mon, 29 Jan 2018 02:18:30 +0100 | From | Frederic Weisbecker <> | Subject | (Ping?) [GIT PULL] isolation: 1Hz residual tick offloading v4 |
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Hi,
Any chance this can either get pulled or declined as the merge window is starting?
Thanks.
On Fri, Jan 19, 2018 at 01:02:14AM +0100, Frederic Weisbecker wrote: > Ingo, > > Please pull the sched/0hz-v2 branch that can be found at: > > git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git > sched/0hz-v2 > > HEAD: 9b14d5204490f9acd03998a5e406ecadb87cddba > > Changes in v4: > > * Remove the nohz_offload option, just stick with the existing interface, > the change is transparent. Suggested by Luiz. > > * Automatically pin workqueues to housekeepers. > > --- > Now that scheduler_tick() has become resilient towards the absence of > ticks, current->sched_class->task_tick() is the last piece that needs > at least 1Hz tick to keep scheduler stats alive. > > This patchset offloads this residual 1Hz tick to workqueues. This way > the nohz full CPUs don't have anymore tick (assuming nothing else > requires it) as their residual 1Hz tick get handled by the housekeepers. > > Nothing special is required for testing, just use the usual kernel > parameters, say on CPUs 1-7: > > "nohz_full=1-7" > or > "isolcpus=nohz_offload,domain,1-7" > > Thanks, > Frederic > --- > > Frederic Weisbecker (6): > sched: Rename init_rq_hrtick to hrtick_rq_init > nohz: Allow to check if remote CPU tick is stopped > sched/isolation: Isolate workqueues when "nohz_full=" is set > sched/isolation: Residual 1Hz scheduler tick offload > sched/nohz: Remove the 1 Hz tick code > sched/isolation: Tick offload documentation > > > Documentation/admin-guide/kernel-parameters.txt | 6 +- > include/linux/sched/isolation.h | 1 + > include/linux/sched/nohz.h | 4 - > include/linux/tick.h | 2 + > kernel/sched/core.c | 104 +++++++++++++++++------- > kernel/sched/idle_task.c | 1 - > kernel/sched/isolation.c | 8 +- > kernel/sched/sched.h | 13 +-- > kernel/time/tick-sched.c | 13 +-- > kernel/workqueue.c | 3 +- > 10 files changed, 103 insertions(+), 52 deletions(-)
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