From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4D99738F24E for ; Wed, 25 Feb 2026 09:52:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772013147; cv=none; b=N/58jXUil6f4Ym99ejQGhC9oTlRaCpuaTq/DvPovuZYTUYGHrzNWS680jbmQNRXv8JWLutsQE6fPYDEmnN7/rYR66G1NvXoKjhvW8A82JGb0Fb+TXmaH6k/Ujnzwsu9yzRertNV7WiwIOyf0nFeHICRmswps70qGjy66OVyvUYk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772013147; c=relaxed/simple; bh=YTdDWU/McslJBMfpiCqWPWkukwYKZ9x11NqLxA1saa8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:content-type; b=HujlkmrBUaosdc9M1IEE87+pV/LxfAgXk7sWgZ6HZDjg+2+FNXQLNmwsP8wNAee1vdEAX/IF4g8+NoDjNczgADe33po1OUagCJHPmVbdjLh50yMOZD4G9RA1J9ImLa8cazjERMmxMynXMJYUzhGrmlcOGnCQFWfEEEnKjheLJ/0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=VeLftT6S; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="VeLftT6S" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772013140; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=+pTvSeysmtG3cmJT1dD9cUCi+uE5i+j66jGG4GNU56s=; b=VeLftT6S9il12iGEgefPrirINkTzcxQNo/PsiaPODTA7a6rpxZW+FZycKSLVIaCIfMPc7E RDTXNvtfx9y8rwQq8Z8JMTqGHJwKmuYqMZPe5CkIfqzy9PPODCbgjwYxbLtZFv0CXWlxy5 imIlSmVnx1Hrj9pTQoIL0d2MYeynsQc= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-139-divyKdsINFGa9qTlV_Op3Q-1; Wed, 25 Feb 2026 04:52:17 -0500 X-MC-Unique: divyKdsINFGa9qTlV_Op3Q-1 X-Mimecast-MFC-AGG-ID: divyKdsINFGa9qTlV_Op3Q_1772013135 Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id C146C18004AD; Wed, 25 Feb 2026 09:52:15 +0000 (UTC) Received: from gmonaco-thinkpadt14gen3.rmtit.csb (unknown [10.44.34.216]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id EA17B180066B; Wed, 25 Feb 2026 09:52:10 +0000 (UTC) From: Gabriele Monaco To: linux-kernel@vger.kernel.org, Steven Rostedt , Nam Cao , Juri Lelli , Masami Hiramatsu , Ingo Molnar , Peter Zijlstra , linux-trace-kernel@vger.kernel.org Cc: K Prateek Nayak , Gabriele Monaco , Tomas Glozar , Clark Williams , John Kacur Subject: [PATCH v6 08/16] sched: Add task enqueue/dequeue trace points Date: Wed, 25 Feb 2026 10:51:14 +0100 Message-ID: <20260225095122.80683-9-gmonaco@redhat.com> In-Reply-To: <20260225095122.80683-1-gmonaco@redhat.com> References: <20260225095122.80683-1-gmonaco@redhat.com> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 X-Mimecast-MFC-PROC-ID: LBqwQLIiiaKKAB26qRs19Wp1MeYQFZHKwX5tshRDlAI_1772013135 X-Mimecast-Originator: redhat.com Content-Transfer-Encoding: 8bit content-type: text/plain; charset="US-ASCII"; x-default=true From: Nam Cao Add trace points into enqueue_task() and dequeue_task(). Signed-off-by: Nam Cao Suggested-by: Peter Zijlstra Reviewed-by: K Prateek Nayak Co-developed-by: Gabriele Monaco Signed-off-by: Gabriele Monaco --- Notes: V5: * Do not fire enqueue tracepoint for delayed enqueues include/trace/events/sched.h | 8 ++++++++ kernel/sched/core.c | 12 +++++++++++- kernel/sched/sched.h | 2 ++ 3 files changed, 21 insertions(+), 1 deletion(-) diff --git a/include/trace/events/sched.h b/include/trace/events/sched.h index 7b2645b50e78..5844147ec5fd 100644 --- a/include/trace/events/sched.h +++ b/include/trace/events/sched.h @@ -896,6 +896,14 @@ DECLARE_TRACE(sched_set_need_resched, TP_PROTO(struct task_struct *tsk, int cpu, int tif), TP_ARGS(tsk, cpu, tif)); +DECLARE_TRACE(sched_enqueue, + TP_PROTO(struct task_struct *tsk, int cpu), + TP_ARGS(tsk, cpu)); + +DECLARE_TRACE(sched_dequeue, + TP_PROTO(struct task_struct *tsk, int cpu), + TP_ARGS(tsk, cpu)); + #endif /* _TRACE_SCHED_H */ /* This part must be outside protection */ diff --git a/kernel/sched/core.c b/kernel/sched/core.c index 759777694c78..4ca79ff58fca 100644 --- a/kernel/sched/core.c +++ b/kernel/sched/core.c @@ -122,6 +122,8 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(sched_compute_energy_tp); EXPORT_TRACEPOINT_SYMBOL_GPL(sched_entry_tp); EXPORT_TRACEPOINT_SYMBOL_GPL(sched_exit_tp); EXPORT_TRACEPOINT_SYMBOL_GPL(sched_set_need_resched_tp); +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_enqueue_tp); +EXPORT_TRACEPOINT_SYMBOL_GPL(sched_dequeue_tp); DEFINE_PER_CPU_SHARED_ALIGNED(struct rq, runqueues); DEFINE_PER_CPU(struct rnd_state, sched_rnd_state); @@ -2094,6 +2096,9 @@ unsigned long get_wchan(struct task_struct *p) void enqueue_task(struct rq *rq, struct task_struct *p, int flags) { + if (trace_sched_enqueue_tp_enabled() && !(flags & ENQUEUE_DELAYED)) + trace_sched_enqueue_tp(p, rq->cpu); + if (!(flags & ENQUEUE_NOCLOCK)) update_rq_clock(rq); @@ -2120,6 +2125,8 @@ void enqueue_task(struct rq *rq, struct task_struct *p, int flags) */ inline bool dequeue_task(struct rq *rq, struct task_struct *p, int flags) { + int ret; + if (sched_core_enabled(rq)) sched_core_dequeue(rq, p, flags); @@ -2136,7 +2143,10 @@ inline bool dequeue_task(struct rq *rq, struct task_struct *p, int flags) * and mark the task ->sched_delayed. */ uclamp_rq_dec(rq, p); - return p->sched_class->dequeue_task(rq, p, flags); + ret = p->sched_class->dequeue_task(rq, p, flags); + if (trace_sched_dequeue_tp_enabled() && !(flags & DEQUEUE_SLEEP)) + trace_sched_dequeue_tp(p, rq->cpu); + return ret; } void activate_task(struct rq *rq, struct task_struct *p, int flags) diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h index b82fb70a9d54..a83177742603 100644 --- a/kernel/sched/sched.h +++ b/kernel/sched/sched.h @@ -2944,6 +2944,8 @@ static inline void sub_nr_running(struct rq *rq, unsigned count) static inline void __block_task(struct rq *rq, struct task_struct *p) { + trace_sched_dequeue_tp(p, rq->cpu); + if (p->sched_contributes_to_load) rq->nr_uninterruptible++; -- 2.53.0