From nobody Sun Dec 14 06:18:12 2025 Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) (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 B930025A635 for ; Tue, 4 Feb 2025 05:21:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.60.130.6 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738646487; cv=none; b=gdN4YnliEIxoO7xNy7LYRdb7k/U5dkUsPjop4WwxtNIjnQ1aWrS8hH990J8rRamgJtMBW0opLA04rKTBe96ScMszWc/wuIetF2jEJn8JeRckAlInmnzYwQXwlgzFHjzgCSBwu8xpjckUcEGNBN8vr72AaB+r4SvfrvNTpdJysZE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738646487; c=relaxed/simple; bh=Rmsqs3RbVZLXEtombTMxqagQ8sIbesMxq6d8VcKK9vo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=mjz41JjdFobpVyjnM1oHXMRxyl0r24Opt2/rS3Xxk9C62j5DCJ29oJRES/NSoAbIx2fdstgrDOIJYawLFSmWxHjwwNK0SPRHoLdslQv6u+Z94YaQEve6iRcOlBmPGY+BozIYNvaJ0FJK/HTu8G8PrCB3Y5ZOUk2LSQl8PuJF3Kg= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com; spf=pass smtp.mailfrom=igalia.com; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b=VSjlcYXj; arc=none smtp.client-ip=178.60.130.6 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=igalia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b="VSjlcYXj" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=AJslrF4TGjr61ixox4sklLLk+bB81YEp0Sp/IRhoECY=; b=VSjlcYXjJrqFMCGoGT43N73JqC HklC0JV+Nbh09hBBRk0mr1OFGW4f2RlKL08lh84FOiSrASyiaPQHJXXtw0PZFB4e8/AGg3ZR7wkqK hLsQiP55qJ1WKzqIjsKm37jjQbqoLKqSnjEtt1eru3NPxNRKKAmuC/ogJivKKAEmYqb76wA0S950f ZpqFlSyMJkN1rrmESlL8TJY83evlHFz+mmcN/m62FVIKdnOmBiuHyIj208H+xYlbcU3xcOqNGHLMK lW2g4tU/XhkV48kIgxTVocSXtODWkSlmmUXgpdhu7dTm7rBrMmRVJOCXNNSazflXNNZ5LZo+aeLlt QhRW5sKw==; Received: from [58.29.143.236] (helo=localhost) by fanzine2.igalia.com with utf8esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1tfBMw-003J1Y-NX; Tue, 04 Feb 2025 06:21:13 +0100 From: Changwoo Min To: tj@kernel.org, void@manifault.com, arighi@nvidia.com Cc: kernel-dev@igalia.com, linux-kernel@vger.kernel.org, Changwoo Min Subject: [PATCH v4 1/7] sched_ext: Add an event, SCX_EV_ENQ_SKIP_EXITING Date: Tue, 4 Feb 2025 14:20:51 +0900 Message-ID: <20250204052057.67776-2-changwoo@igalia.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250204052057.67776-1-changwoo@igalia.com> References: <20250204052057.67776-1-changwoo@igalia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a core event, SCX_EV_ENQ_SKIP_EXITING, which represents how many times a task is enqueued to a local DSQ when exiting if SCX_OPS_ENQ_EXITING is not set. __scx_add_event() is used since the caller holds an rq lock, so the preemption has already been disabled. Signed-off-by: Changwoo Min --- kernel/sched/ext.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index cbb3d059072f..c72ba405a1d3 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -1461,6 +1461,12 @@ struct scx_event_stats { * continued to run because there were no other tasks on the CPU. */ u64 SCX_EV_DISPATCH_KEEP_LAST; + + /* + * If SCX_OPS_ENQ_EXITING is not set, the number of times that a task + * is dispatched to a local DSQ when exiting. + */ + u64 SCX_EV_ENQ_SKIP_EXITING; }; =20 /* @@ -2068,8 +2074,10 @@ static void do_enqueue_task(struct rq *rq, struct ta= sk_struct *p, u64 enq_flags, =20 /* see %SCX_OPS_ENQ_EXITING */ if (!static_branch_unlikely(&scx_ops_enq_exiting) && - unlikely(p->flags & PF_EXITING)) + unlikely(p->flags & PF_EXITING)) { + __scx_add_event(SCX_EV_ENQ_SKIP_EXITING, 1); goto local; + } =20 if (!SCX_HAS_OP(enqueue)) goto global; @@ -4985,6 +4993,7 @@ static void scx_dump_state(struct scx_exit_info *ei, = size_t dump_len) scx_dump_event(s, &events, SCX_EV_SELECT_CPU_FALLBACK); scx_dump_event(s, &events, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_dump_event(s, &events, SCX_EV_DISPATCH_KEEP_LAST); + scx_dump_event(s, &events, SCX_EV_ENQ_SKIP_EXITING); =20 if (seq_buf_has_overflowed(&s) && dump_len >=3D sizeof(trunc_marker)) memcpy(ei->dump + dump_len - sizeof(trunc_marker), @@ -7121,6 +7130,7 @@ __bpf_kfunc void scx_bpf_events(struct scx_event_stat= s *events, scx_agg_event(&e_sys, e_cpu, SCX_EV_SELECT_CPU_FALLBACK); scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_KEEP_LAST); + scx_agg_event(&e_sys, e_cpu, SCX_EV_ENQ_SKIP_EXITING); } =20 /* --=20 2.48.1 From nobody Sun Dec 14 06:18:12 2025 Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) (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 9AEA81E0087 for ; Tue, 4 Feb 2025 05:21:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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Received: from [58.29.143.236] (helo=localhost) by fanzine2.igalia.com with utf8esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1tfBN1-003J1h-4O; Tue, 04 Feb 2025 06:21:17 +0100 From: Changwoo Min To: tj@kernel.org, void@manifault.com, arighi@nvidia.com Cc: kernel-dev@igalia.com, linux-kernel@vger.kernel.org, Changwoo Min Subject: [PATCH v4 2/7] sched_ext: Add an event, SCX_EV_BYPASS_ACTIVATE Date: Tue, 4 Feb 2025 14:20:52 +0900 Message-ID: <20250204052057.67776-3-changwoo@igalia.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250204052057.67776-1-changwoo@igalia.com> References: <20250204052057.67776-1-changwoo@igalia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a core event, SCX_EV_BYPASS_ACTIVATE, which represents how many times the bypass mode has been triggered. Signed-off-by: Changwoo Min --- kernel/sched/ext.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index c72ba405a1d3..377c2e99cf4f 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -1467,6 +1467,11 @@ struct scx_event_stats { * is dispatched to a local DSQ when exiting. */ u64 SCX_EV_ENQ_SKIP_EXITING; + + /* + * The number of times the bypassing mode has been activated. + */ + u64 SCX_EV_BYPASS_ACTIVATE; }; =20 /* @@ -4399,6 +4404,7 @@ static void scx_ops_bypass(bool bypass) WARN_ON_ONCE(scx_ops_bypass_depth <=3D 0); if (scx_ops_bypass_depth !=3D 1) goto unlock; + scx_add_event(SCX_EV_BYPASS_ACTIVATE, 1); } else { scx_ops_bypass_depth--; WARN_ON_ONCE(scx_ops_bypass_depth < 0); @@ -4994,6 +5000,7 @@ static void scx_dump_state(struct scx_exit_info *ei, = size_t dump_len) scx_dump_event(s, &events, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_dump_event(s, &events, SCX_EV_DISPATCH_KEEP_LAST); scx_dump_event(s, &events, SCX_EV_ENQ_SKIP_EXITING); + scx_dump_event(s, &events, SCX_EV_BYPASS_ACTIVATE); =20 if (seq_buf_has_overflowed(&s) && dump_len >=3D sizeof(trunc_marker)) memcpy(ei->dump + dump_len - sizeof(trunc_marker), @@ -7131,6 +7138,7 @@ __bpf_kfunc void scx_bpf_events(struct scx_event_stat= s *events, scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_KEEP_LAST); scx_agg_event(&e_sys, e_cpu, SCX_EV_ENQ_SKIP_EXITING); + scx_agg_event(&e_sys, e_cpu, SCX_EV_BYPASS_ACTIVATE); } =20 /* --=20 2.48.1 From nobody Sun Dec 14 06:18:12 2025 Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) (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 B788C1FF60F for ; Tue, 4 Feb 2025 05:21:28 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.60.130.6 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738646490; 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Tue, 04 Feb 2025 06:21:21 +0100 From: Changwoo Min To: tj@kernel.org, void@manifault.com, arighi@nvidia.com Cc: kernel-dev@igalia.com, linux-kernel@vger.kernel.org, Changwoo Min Subject: [PATCH v4 3/7] sched_ext: Add an event, SCX_EV_BYPASS_DISPATCH Date: Tue, 4 Feb 2025 14:20:53 +0900 Message-ID: <20250204052057.67776-4-changwoo@igalia.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250204052057.67776-1-changwoo@igalia.com> References: <20250204052057.67776-1-changwoo@igalia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a core event, SCX_EV_BYPASS_DISPATCH, which represents how many tasks have been dispatched in the bypass mode. __scx_add_event() is used since the caller holds an rq lock or p->pi_lock, so the preemption has already been disabled. Signed-off-by: Changwoo Min --- kernel/sched/ext.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 377c2e99cf4f..0ed2db44ae33 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -1468,6 +1468,11 @@ struct scx_event_stats { */ u64 SCX_EV_ENQ_SKIP_EXITING; =20 + /* + * The number of tasks dispatched in the bypassing mode. + */ + u64 SCX_EV_BYPASS_DISPATCH; + /* * The number of times the bypassing mode has been activated. */ @@ -2071,8 +2076,10 @@ static void do_enqueue_task(struct rq *rq, struct ta= sk_struct *p, u64 enq_flags, if (!scx_rq_online(rq)) goto local; =20 - if (scx_rq_bypassing(rq)) + if (scx_rq_bypassing(rq)) { + __scx_add_event(SCX_EV_BYPASS_DISPATCH, 1); goto global; + } =20 if (p->scx.ddsp_dsq_id !=3D SCX_DSQ_INVALID) goto direct; @@ -3253,6 +3260,8 @@ bool scx_prio_less(const struct task_struct *a, const= struct task_struct *b, =20 static int select_task_rq_scx(struct task_struct *p, int prev_cpu, int wak= e_flags) { + bool rq_bypass; + /* * sched_exec() calls with %WF_EXEC when @p is about to exec(2) as it * can be a good migration opportunity with low cache and memory @@ -3266,7 +3275,8 @@ static int select_task_rq_scx(struct task_struct *p, = int prev_cpu, int wake_flag if (unlikely(wake_flags & WF_EXEC)) return prev_cpu; =20 - if (SCX_HAS_OP(select_cpu) && !scx_rq_bypassing(task_rq(p))) { + rq_bypass =3D scx_rq_bypassing(task_rq(p)); + if (SCX_HAS_OP(select_cpu) && !rq_bypass) { s32 cpu; struct task_struct **ddsp_taskp; =20 @@ -3292,6 +3302,9 @@ static int select_task_rq_scx(struct task_struct *p, = int prev_cpu, int wake_flag p->scx.slice =3D SCX_SLICE_DFL; p->scx.ddsp_dsq_id =3D SCX_DSQ_LOCAL; } + + if (rq_bypass) + __scx_add_event(SCX_EV_BYPASS_DISPATCH, 1); return cpu; } } @@ -5000,6 +5013,7 @@ static void scx_dump_state(struct scx_exit_info *ei, = size_t dump_len) scx_dump_event(s, &events, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_dump_event(s, &events, SCX_EV_DISPATCH_KEEP_LAST); scx_dump_event(s, &events, SCX_EV_ENQ_SKIP_EXITING); + scx_dump_event(s, &events, SCX_EV_BYPASS_DISPATCH); scx_dump_event(s, &events, SCX_EV_BYPASS_ACTIVATE); =20 if (seq_buf_has_overflowed(&s) && dump_len >=3D sizeof(trunc_marker)) @@ -7138,6 +7152,7 @@ __bpf_kfunc void scx_bpf_events(struct scx_event_stat= s *events, scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_KEEP_LAST); scx_agg_event(&e_sys, e_cpu, SCX_EV_ENQ_SKIP_EXITING); + scx_agg_event(&e_sys, e_cpu, SCX_EV_BYPASS_DISPATCH); scx_agg_event(&e_sys, e_cpu, SCX_EV_BYPASS_ACTIVATE); } =20 --=20 2.48.1 From nobody Sun Dec 14 06:18:12 2025 Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) (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 4EE9E2010F5 for ; Tue, 4 Feb 2025 05:21:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.60.130.6 ARC-Seal: i=1; a=rsa-sha256; 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Tue, 04 Feb 2025 06:21:26 +0100 From: Changwoo Min To: tj@kernel.org, void@manifault.com, arighi@nvidia.com Cc: kernel-dev@igalia.com, linux-kernel@vger.kernel.org, Changwoo Min Subject: [PATCH v4 4/7] sched_ext: Add an event, SCX_EV_BYPASS_DURATION Date: Tue, 4 Feb 2025 14:20:54 +0900 Message-ID: <20250204052057.67776-5-changwoo@igalia.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250204052057.67776-1-changwoo@igalia.com> References: <20250204052057.67776-1-changwoo@igalia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Add a core event, SCX_EV_BYPASS_DURATION, which represents the total duration of bypass modes in nanoseconds. Signed-off-by: Changwoo Min --- kernel/sched/ext.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 0ed2db44ae33..8a9a30895381 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -1468,6 +1468,11 @@ struct scx_event_stats { */ u64 SCX_EV_ENQ_SKIP_EXITING; =20 + /* + * The total duration of bypass modes in nanoseconds. + */ + u64 SCX_EV_BYPASS_DURATION; + /* * The number of tasks dispatched in the bypassing mode. */ @@ -4408,6 +4413,8 @@ static void scx_clear_softlockup(void) static void scx_ops_bypass(bool bypass) { static DEFINE_RAW_SPINLOCK(bypass_lock); + static unsigned long bypass_timestamp; + int cpu; unsigned long flags; =20 @@ -4417,12 +4424,15 @@ static void scx_ops_bypass(bool bypass) WARN_ON_ONCE(scx_ops_bypass_depth <=3D 0); if (scx_ops_bypass_depth !=3D 1) goto unlock; + bypass_timestamp =3D ktime_get_ns(); scx_add_event(SCX_EV_BYPASS_ACTIVATE, 1); } else { scx_ops_bypass_depth--; WARN_ON_ONCE(scx_ops_bypass_depth < 0); if (scx_ops_bypass_depth !=3D 0) goto unlock; + scx_add_event(SCX_EV_BYPASS_DURATION, + ktime_get_ns() - bypass_timestamp); } =20 atomic_inc(&scx_ops_breather_depth); @@ -5013,6 +5023,7 @@ static void scx_dump_state(struct scx_exit_info *ei, = size_t dump_len) scx_dump_event(s, &events, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_dump_event(s, &events, SCX_EV_DISPATCH_KEEP_LAST); scx_dump_event(s, &events, SCX_EV_ENQ_SKIP_EXITING); + scx_dump_event(s, &events, SCX_EV_BYPASS_DURATION); scx_dump_event(s, &events, SCX_EV_BYPASS_DISPATCH); scx_dump_event(s, &events, SCX_EV_BYPASS_ACTIVATE); =20 @@ -7152,6 +7163,7 @@ __bpf_kfunc void scx_bpf_events(struct scx_event_stat= s *events, scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE); scx_agg_event(&e_sys, e_cpu, SCX_EV_DISPATCH_KEEP_LAST); scx_agg_event(&e_sys, e_cpu, SCX_EV_ENQ_SKIP_EXITING); + scx_agg_event(&e_sys, e_cpu, SCX_EV_BYPASS_DURATION); scx_agg_event(&e_sys, e_cpu, SCX_EV_BYPASS_DISPATCH); scx_agg_event(&e_sys, e_cpu, SCX_EV_BYPASS_ACTIVATE); 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charset="utf-8" scx_bpf_events() is added to the header files so the BPF scheduler can use it. Also, scx_read_event() is added to read an event type in a compatible way. Signed-off-by: Changwoo Min --- tools/sched_ext/include/scx/common.bpf.h | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/tools/sched_ext/include/scx/common.bpf.h b/tools/sched_ext/inc= lude/scx/common.bpf.h index d72b60a0c582..ae717f4d6ede 100644 --- a/tools/sched_ext/include/scx/common.bpf.h +++ b/tools/sched_ext/include/scx/common.bpf.h @@ -78,6 +78,10 @@ struct rq *scx_bpf_cpu_rq(s32 cpu) __ksym; struct cgroup *scx_bpf_task_cgroup(struct task_struct *p) __ksym __weak; u64 scx_bpf_now(void) __ksym __weak; =20 +void scx_bpf_events(struct scx_event_stats *events, size_t events__sz) __k= sym __weak; +#define scx_read_event(e, name) \ + (bpf_core_field_exists((e)->name) ? (e)->name : 0) + /* * Use the following as @it__iter when calling scx_bpf_dsq_move[_vtime]() = from * within bpf_for_each() loops. --=20 2.48.1 From nobody Sun Dec 14 06:18:12 2025 Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) (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 BB8BF1F8EEF for ; Tue, 4 Feb 2025 05:21:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=178.60.130.6 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738646503; cv=none; b=l0svnVdPifTDDfyQlqK9HaPjNUcxtPvNw0DL10boQEabrsYAwtLESIt7rEj/OjeMTxyCClSXD9iBKLoSVymc1fCHOLh3MKf0Do/WF7mh0BrnI9UUgpf6tDUu21meh9wZT4mhMRhxofWhokmDQ/10Ws32jfMhn8aSugbQd55Kc5Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738646503; c=relaxed/simple; bh=EFRN06YrP7HFKEdVqjzP/kCbiwK4F1EK5Ov4W3EfMrc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=QY1Geq28lal/teDerw3A8B73uCxNSy3rbxcXzgSFe4O+wEvxDcxnG0PiCCmWnk91S1y5AlxPMk1j5wpnzE4vdRyk7UfogGB7miG8wN4mvPFhxi3L4VpRGHK5yzb6kuLPcvo6d4T3IjEtSytYttl/3N45I74X2qcIDDqfnu6Q8uQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com; spf=pass smtp.mailfrom=igalia.com; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b=cE/KNvk8; arc=none smtp.client-ip=178.60.130.6 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=igalia.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=igalia.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=igalia.com header.i=@igalia.com header.b="cE/KNvk8" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Sender:Reply-To:Content-Type:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=BBLeT2PN/FG2eFSj93ESZQLZAda1GTvmFqlnUkA5aUU=; b=cE/KNvk8pfdRLSBAiKrmfoYIQP w5l+4Oq7XzOeZwO367sAWvU0+b90HxsqPjXH9we8WcX9Vpnx8mChYEx/FYQix8rWWmrYDthIT2QUd FqIEZedg9WyGh+L8KYu5U074hMsgUQjv8s+/4YSQfwhsOd2xH1Uiti6iIlY7iD9/mJnAoQ1ohluER 5s8w1FFU+Jgh/52g1SoGm/gQVASIhPSnYqTzw/B2duyvXV/yNEfscZ2NN1tsjOTEhgHV02vIJdhJD Mi+E7NuCjAHg5LXNcAjqP5Z7M7XmEz1G50Qr9SvEnCeoeJFn458Vaa7f+WDke0ZJMrxnTW+ZKPwOZ 2oZvgnHA==; Received: from [58.29.143.236] (helo=localhost) by fanzine2.igalia.com with utf8esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1tfBNJ-003J2Q-BW; Tue, 04 Feb 2025 06:21:35 +0100 From: Changwoo Min To: tj@kernel.org, void@manifault.com, arighi@nvidia.com Cc: kernel-dev@igalia.com, linux-kernel@vger.kernel.org, Changwoo Min Subject: [PATCH v4 6/7] sched_ext: Print core event count in scx_central scheduler Date: Tue, 4 Feb 2025 14:20:56 +0900 Message-ID: <20250204052057.67776-7-changwoo@igalia.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250204052057.67776-1-changwoo@igalia.com> References: <20250204052057.67776-1-changwoo@igalia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Modify the scx_central scheduler to print the core event counter every second. Signed-off-by: Changwoo Min --- tools/sched_ext/scx_central.bpf.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/tools/sched_ext/scx_central.bpf.c b/tools/sched_ext/scx_centra= l.bpf.c index 50bc1737c167..376c14d5dd0d 100644 --- a/tools/sched_ext/scx_central.bpf.c +++ b/tools/sched_ext/scx_central.bpf.c @@ -256,6 +256,7 @@ static int central_timerfn(void *map, int *key, struct = bpf_timer *timer) u64 now =3D scx_bpf_now(); u64 nr_to_kick =3D nr_queued; s32 i, curr_cpu; + struct scx_event_stats events; =20 curr_cpu =3D bpf_get_smp_processor_id(); if (timer_pinned && (curr_cpu !=3D central_cpu)) { @@ -291,6 +292,26 @@ static int central_timerfn(void *map, int *key, struct= bpf_timer *timer) =20 bpf_timer_start(timer, TIMER_INTERVAL_NS, BPF_F_TIMER_CPU_PIN); __sync_fetch_and_add(&nr_timers, 1); + + /* print event counters every second */ + if (nr_timers % 1000 =3D=3D 0) { + scx_bpf_events(&events, sizeof(events)); + + bpf_printk("%35s: %llu\n", "SCX_EV_SELECT_CPU_FALLBACK", + scx_read_event(&events, SCX_EV_SELECT_CPU_FALLBACK)); + bpf_printk("%35s: %llu\n", "SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE", + scx_read_event(&events, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE)); + bpf_printk("%35s: %llu\n", "SCX_EV_DISPATCH_KEEP_LAST", + scx_read_event(&events, SCX_EV_DISPATCH_KEEP_LAST)); + bpf_printk("%35s: %llu\n", "SCX_EV_ENQ_SKIP_EXITING", + scx_read_event(&events, SCX_EV_ENQ_SKIP_EXITING)); + bpf_printk("%35s: %llu\n", "SCX_EV_BYPASS_DURATION", + scx_read_event(&events, SCX_EV_BYPASS_DURATION)); + bpf_printk("%35s: %llu\n", "SCX_EV_BYPASS_DISPATCH", + scx_read_event(&events, SCX_EV_BYPASS_DISPATCH)); + bpf_printk("%35s: %llu\n", "SCX_EV_BYPASS_ACTIVATE", + scx_read_event(&events, SCX_EV_BYPASS_ACTIVATE)); + } return 0; } =20 --=20 2.48.1 From nobody Sun Dec 14 06:18:12 2025 Received: from fanzine2.igalia.com (fanzine.igalia.com [178.60.130.6]) (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 96D1C204687 for ; Tue, 4 Feb 2025 05:21:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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Received: from [58.29.143.236] (helo=localhost) by fanzine2.igalia.com with utf8esmtpsa (Cipher TLS1.3:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim) id 1tfBNN-003J2X-Ob; Tue, 04 Feb 2025 06:21:40 +0100 From: Changwoo Min To: tj@kernel.org, void@manifault.com, arighi@nvidia.com Cc: kernel-dev@igalia.com, linux-kernel@vger.kernel.org, Changwoo Min Subject: [PATCH v4 7/7] sched_ext: Print core event count in scx_qmap scheduler Date: Tue, 4 Feb 2025 14:20:57 +0900 Message-ID: <20250204052057.67776-8-changwoo@igalia.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250204052057.67776-1-changwoo@igalia.com> References: <20250204052057.67776-1-changwoo@igalia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Modify the scx_qmap scheduler to print the core event counter every second. Signed-off-by: Changwoo Min --- tools/sched_ext/scx_qmap.bpf.c | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) diff --git a/tools/sched_ext/scx_qmap.bpf.c b/tools/sched_ext/scx_qmap.bpf.c index 3a20bb0c014a..5edb79742e37 100644 --- a/tools/sched_ext/scx_qmap.bpf.c +++ b/tools/sched_ext/scx_qmap.bpf.c @@ -763,6 +763,8 @@ static void dump_shared_dsq(void) =20 static int monitor_timerfn(void *map, int *key, struct bpf_timer *timer) { + struct scx_event_stats events; + bpf_rcu_read_lock(); dispatch_highpri(true); bpf_rcu_read_unlock(); @@ -772,6 +774,23 @@ static int monitor_timerfn(void *map, int *key, struct= bpf_timer *timer) if (print_shared_dsq) dump_shared_dsq(); =20 + scx_bpf_events(&events, sizeof(events)); + + bpf_printk("%35s: %llu\n", "SCX_EV_SELECT_CPU_FALLBACK", + scx_read_event(&events, SCX_EV_SELECT_CPU_FALLBACK)); + bpf_printk("%35s: %llu\n", "SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE", + scx_read_event(&events, SCX_EV_DISPATCH_LOCAL_DSQ_OFFLINE)); + bpf_printk("%35s: %llu\n", "SCX_EV_DISPATCH_KEEP_LAST", + scx_read_event(&events, SCX_EV_DISPATCH_KEEP_LAST)); + bpf_printk("%35s: %llu\n", "SCX_EV_ENQ_SKIP_EXITING", + scx_read_event(&events, SCX_EV_ENQ_SKIP_EXITING)); + bpf_printk("%35s: %llu\n", "SCX_EV_BYPASS_DURATION", + scx_read_event(&events, SCX_EV_BYPASS_DURATION)); + bpf_printk("%35s: %llu\n", "SCX_EV_BYPASS_DISPATCH", + scx_read_event(&events, SCX_EV_BYPASS_DISPATCH)); + bpf_printk("%35s: %llu\n", "SCX_EV_BYPASS_ACTIVATE", + scx_read_event(&events, SCX_EV_BYPASS_ACTIVATE)); + bpf_timer_start(timer, ONE_SEC_IN_NS, 0); return 0; } --=20 2.48.1