From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753001Ab3AHCKi (ORCPT ); Mon, 7 Jan 2013 21:10:38 -0500 Received: from mail-we0-f170.google.com ([74.125.82.170]:38284 "EHLO mail-we0-f170.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751505Ab3AHCJ4 (ORCPT ); Mon, 7 Jan 2013 21:09:56 -0500 From: Frederic Weisbecker To: LKML Cc: Frederic Weisbecker , Alessio Igor Bogani , Andrew Morton , Chris Metcalf , Christoph Lameter , Geoff Levand , Gilad Ben Yossef , Hakan Akkan , Ingo Molnar , Li Zhong , Namhyung Kim , "Paul E. McKenney" , Paul Gortmaker , Peter Zijlstra , Steven Rostedt , Thomas Gleixner Subject: [PATCH 32/33] sched: Update rq clock before rt sched average scale Date: Tue, 8 Jan 2013 03:08:32 +0100 Message-Id: <1357610913-1080-33-git-send-email-fweisbec@gmail.com> X-Mailer: git-send-email 1.7.5.4 In-Reply-To: <1357610913-1080-1-git-send-email-fweisbec@gmail.com> References: <1357610913-1080-1-git-send-email-fweisbec@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org When we restart the tick, we catch up with the CPU loads statistics. But we also scale down the rt power. This require an uptodate rq clock. DISCLAIMER: I don't know if this is needed when we wake up from idle. May be this is handled from the reader side in scale_rt_power(). I have yet to understand exactly what this function does. Also scale_rt_power() also need to handle full tickless CPUs when they run RT tasks. And also to remotely handle the missing scaling down usually performed from the tick. Signed-off-by: Frederic Weisbecker Cc: Alessio Igor Bogani Cc: Andrew Morton Cc: Chris Metcalf Cc: Christoph Lameter Cc: Geoff Levand Cc: Gilad Ben Yossef Cc: Hakan Akkan Cc: Ingo Molnar Cc: Li Zhong Cc: Namhyung Kim Cc: Paul E. McKenney Cc: Paul Gortmaker Cc: Peter Zijlstra Cc: Steven Rostedt Cc: Thomas Gleixner --- kernel/sched/core.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 8dfc461..b35d122 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -2650,6 +2650,7 @@ void update_cpu_load_nohz(void) pending_updates = curr_jiffies - this_rq->last_load_update_tick; if (pending_updates) { this_rq->last_load_update_tick = curr_jiffies; + update_rq_clock(this_rq); /* * We were idle, this means load 0, the current load might be * !0 due to remote wakeups and the sort. -- 1.7.5.4