From nobody Tue Dec 30 14:56:15 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E4BBC47074 for ; Wed, 15 Nov 2023 11:34:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234942AbjKOLeA (ORCPT ); Wed, 15 Nov 2023 06:34:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41202 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229796AbjKOLd5 (ORCPT ); Wed, 15 Nov 2023 06:33:57 -0500 Received: from out30-100.freemail.mail.aliyun.com (out30-100.freemail.mail.aliyun.com [115.124.30.100]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5EC8ACC for ; Wed, 15 Nov 2023 03:33:54 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R161e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046059;MF=cruzzhao@linux.alibaba.com;NM=1;PH=DS;RN=12;SR=0;TI=SMTPD_---0VwSxxN2_1700048031; Received: from localhost.localdomain(mailfrom:CruzZhao@linux.alibaba.com fp:SMTPD_---0VwSxxN2_1700048031) by smtp.aliyun-inc.com; Wed, 15 Nov 2023 19:33:51 +0800 From: Cruz Zhao To: mingo@redhat.com, peterz@infradead.org, juri.lelli@redhat.com, vincent.guittot@linaro.org, dietmar.eggemann@arm.com, rostedt@goodmis.org, bsegall@google.com, mgorman@suse.de, bristot@redhat.com, vschneid@redhat.com, joel@joelfernandes.org Cc: linux-kernel@vger.kernel.org Subject: [PATCH 1/4] sched/core: introduce core_id to struct rq Date: Wed, 15 Nov 2023 19:33:38 +0800 Message-Id: <20231115113341.13261-2-CruzZhao@linux.alibaba.com> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20231115113341.13261-1-CruzZhao@linux.alibaba.com> References: <20231115113341.13261-1-CruzZhao@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Introduce core_id to struct rq, indates the cpu id of the core, which is used for getting cpu id of rq->core quickly. Signed-off-by: Cruz Zhao --- kernel/sched/core.c | 16 ++++++++++++---- kernel/sched/sched.h | 1 + 2 files changed, 13 insertions(+), 4 deletions(-) diff --git a/kernel/sched/core.c b/kernel/sched/core.c index a708d225c28e..7a685fae73c4 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -6400,7 +6400,7 @@ static void sched_core_cpu_starting(unsigned int cpu) { const struct cpumask *smt_mask =3D cpu_smt_mask(cpu); struct rq *rq =3D cpu_rq(cpu), *core_rq =3D NULL; - int t; + int t, core_id; =20 guard(core_lock)(&cpu); =20 @@ -6417,6 +6417,7 @@ static void sched_core_cpu_starting(unsigned int cpu) rq =3D cpu_rq(t); if (rq->core =3D=3D rq) { core_rq =3D rq; + core_id =3D t; break; } } @@ -6428,8 +6429,10 @@ static void sched_core_cpu_starting(unsigned int cpu) for_each_cpu(t, smt_mask) { rq =3D cpu_rq(t); =20 - if (t =3D=3D cpu) + if (t =3D=3D cpu) { rq->core =3D core_rq; + rq->core_id =3D core_id; + } =20 WARN_ON_ONCE(rq->core !=3D core_rq); } @@ -6439,7 +6442,7 @@ static void sched_core_cpu_deactivate(unsigned int cp= u) { const struct cpumask *smt_mask =3D cpu_smt_mask(cpu); struct rq *rq =3D cpu_rq(cpu), *core_rq =3D NULL; - int t; + int t, core_id; =20 guard(core_lock)(&cpu); =20 @@ -6458,6 +6461,7 @@ static void sched_core_cpu_deactivate(unsigned int cp= u) if (t =3D=3D cpu) continue; core_rq =3D cpu_rq(t); + core_id =3D t; break; } =20 @@ -6483,6 +6487,7 @@ static void sched_core_cpu_deactivate(unsigned int cp= u) for_each_cpu(t, smt_mask) { rq =3D cpu_rq(t); rq->core =3D core_rq; + rq->core_id =3D core_id; } } =20 @@ -6490,8 +6495,10 @@ static inline void sched_core_cpu_dying(unsigned int= cpu) { struct rq *rq =3D cpu_rq(cpu); =20 - if (rq->core !=3D rq) + if (rq->core !=3D rq) { rq->core =3D rq; + rq->core_id =3D cpu; + } } =20 #else /* !CONFIG_SCHED_CORE */ @@ -10008,6 +10015,7 @@ void __init sched_init(void) =20 #ifdef CONFIG_SCHED_CORE rq->core =3D rq; + rq->core_id =3D i; rq->core_pick =3D NULL; rq->core_enabled =3D 0; rq->core_tree =3D RB_ROOT; diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index 2e5a95486a42..1b62165fc840 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -1121,6 +1121,7 @@ struct rq { #ifdef CONFIG_SCHED_CORE /* per rq */ struct rq *core; + unsigned int core_id; struct task_struct *core_pick; unsigned int core_enabled; unsigned int core_sched_seq; --=20 2.39.3