From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8AD9ECE58D for ; Mon, 7 Oct 2019 08:31:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C541120867 for ; Mon, 7 Oct 2019 08:31:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727581AbfJGIb2 (ORCPT ); Mon, 7 Oct 2019 04:31:28 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:5726 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727514AbfJGIbO (ORCPT ); Mon, 7 Oct 2019 04:31:14 -0400 Received: from pps.filterd (m0098413.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x978SL7F014030 for ; Mon, 7 Oct 2019 04:31:10 -0400 Received: from e06smtp03.uk.ibm.com (e06smtp03.uk.ibm.com [195.75.94.99]) by mx0b-001b2d01.pphosted.com with ESMTP id 2vg1qd0d4r-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Mon, 07 Oct 2019 04:31:10 -0400 Received: from localhost by e06smtp03.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Mon, 7 Oct 2019 09:31:08 +0100 Received: from b06cxnps3075.portsmouth.uk.ibm.com (9.149.109.195) by e06smtp03.uk.ibm.com (192.168.101.133) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Mon, 7 Oct 2019 09:31:03 +0100 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06cxnps3075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x978V2QX54067400 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Mon, 7 Oct 2019 08:31:02 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 47AD611C04C; Mon, 7 Oct 2019 08:31:02 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F224E11C069; Mon, 7 Oct 2019 08:30:59 +0000 (GMT) Received: from localhost.in.ibm.com (unknown [9.124.35.220]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTP; Mon, 7 Oct 2019 08:30:59 +0000 (GMT) From: Parth Shah To: linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Cc: peterz@infradead.org, mingo@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, patrick.bellasi@matbug.net, valentin.schneider@arm.com, pavel@ucw.cz, dsmythies@telus.net, quentin.perret@arm.com, rafael.j.wysocki@intel.com, tim.c.chen@linux.intel.com, daniel.lezcano@linaro.org Subject: [RFC v5 3/6] sched/core: Update turbo_sched count only when required Date: Mon, 7 Oct 2019 14:00:48 +0530 X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191007083051.4820-1-parth@linux.ibm.com> References: <20191007083051.4820-1-parth@linux.ibm.com> X-TM-AS-GCONF: 00 x-cbid: 19100708-0012-0000-0000-00000354C1D2 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19100708-0013-0000-0000-0000218FD1A0 Message-Id: <20191007083051.4820-4-parth@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-10-07_01:,, signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1908290000 definitions=main-1910070088 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Use the get/put methods to add/remove the use of TurboSched support, such that the feature is turned on only in the presence of atleast one classified small bckground task. Signed-off-by: Parth Shah --- kernel/sched/core.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index ee5980b4e150..6e1ae8046fe0 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -3141,6 +3141,9 @@ static struct rq *finish_task_switch(struct task_struct *prev) mmdrop(mm); } if (unlikely(prev_state == TASK_DEAD)) { + if (unlikely(prev->flags & PF_CAN_BE_PACKED)) + turbo_sched_put(); + if (prev->sched_class->task_dead) prev->sched_class->task_dead(prev); @@ -4793,6 +4796,10 @@ static int __sched_setscheduler(struct task_struct *p, prev_class = p->sched_class; + /* Refcount tasks classified as a small background task */ + if (task_packing_flag != (p->flags & PF_CAN_BE_PACKED)) + (task_packing_flag) ? turbo_sched_get() : turbo_sched_put(); + __setscheduler(rq, p, attr, pi); __setscheduler_uclamp(p, attr); -- 2.17.1