From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754620AbeA2BSe (ORCPT ); Sun, 28 Jan 2018 20:18:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:57402 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753233AbeA2BSd (ORCPT ); Sun, 28 Jan 2018 20:18:33 -0500 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BB4D820B80 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=frederic@kernel.org Date: Mon, 29 Jan 2018 02:18:30 +0100 From: Frederic Weisbecker To: Ingo Molnar , Thomas Gleixner , Peter Zijlstra Cc: LKML , Chris Metcalf , Luiz Capitulino , Christoph Lameter , "Paul E . McKenney" , Wanpeng Li , Mike Galbraith , Rik van Riel Subject: (Ping?) [GIT PULL] isolation: 1Hz residual tick offloading v4 Message-ID: <20180129011829.GB2942@lerouge> References: <1516320140-13189-1-git-send-email-frederic@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1516320140-13189-1-git-send-email-frederic@kernel.org> User-Agent: Mutt/1.5.24 (2015-08-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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(-)