From nobody Sun Dec 14 19:19:42 2025 Received: from m16.mail.126.com (m16.mail.126.com [220.197.31.9]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 0F7282686B9; Fri, 18 Apr 2025 03:27:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=220.197.31.9 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744946845; cv=none; b=iW0ccKVNSp3aqzlE9OzY28MhSZAA36sf2ldhnzaEwGhv60OuZec0e+BobX4p2g8u1+uKP7h6snIGAfud8pa5m6noe0T13GwN4k8dATE/jeSt+YlczZ0mS6bDgrY0OiC4zn+U22kmSnI5qsQ0fSrEvyVF6G8sedpAVvJCtcktRAM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744946845; c=relaxed/simple; bh=sRTYYXi+q6YFmn2CM84PAr5Xq+GZZ+uf1kwrPa8hsxQ=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=fCIiww7gPLqDrZIVRM3Y9BUp7mg7h1WLzoAdLjAnEAXwTe1oAABfOExAqlAmH6jVZ/4waG42IO7eiA0a3G1DDl37JaRPUkjMkJpZS1PCS1J0LArpAF+1rQMWbd0BmEIAB6PyXItSD2P1KxPCOwfwduH1EIF+yh0RDU2BikJKnto= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=126.com; spf=pass smtp.mailfrom=126.com; dkim=pass (1024-bit key) header.d=126.com header.i=@126.com header.b=T9mZ0So2; arc=none smtp.client-ip=220.197.31.9 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=126.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=126.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=126.com header.i=@126.com header.b="T9mZ0So2" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=126.com; s=s110527; h=From:Subject:Date:Message-Id:MIME-Version; bh=dfDAl NI7Mtaa7Np1mFi7q1dvflRvIlHpBBi3IZLBURw=; b=T9mZ0So2iZwkQ5uvZzcE2 Qz5TyXYVQUvYvUe52uzxNptLfR/huW8NphGOhWIVsILJKrSkste4spzXhHjeA3/X 5D/MHr9UBBIk8vofaQo+ztBXVr2j1mjCf8ihS2C462xthKeQ6M5BxAkc0q4k6JSS czr3SOh0yogG9Mkd5kLKPo= Received: from localhost.localdomain (unknown []) by gzsmtp4 (Coremail) with SMTP id PykvCgD3l2pNxgFodOZBDA--.38467S3; Fri, 18 Apr 2025 11:26:08 +0800 (CST) From: Honglei Wang To: tj@kernel.org, void@manifault.com, arighi@nvidia.com, changwoo@igalia.com Cc: 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, vschneid@redhat.com, joshdon@google.com, brho@google.com, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, jameshongleiwang@126.com Subject: [PATCH v2 1/2] sched_ext: change the variable name for slice refill event Date: Fri, 18 Apr 2025 11:26:02 +0800 Message-Id: <20250418032603.61803-2-jameshongleiwang@126.com> X-Mailer: git-send-email 2.39.5 (Apple Git-154) In-Reply-To: <20250418032603.61803-1-jameshongleiwang@126.com> References: <20250418032603.61803-1-jameshongleiwang@126.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 X-CM-TRANSID: PykvCgD3l2pNxgFodOZBDA--.38467S3 X-Coremail-Antispam: 1Uf129KBjvJXoW3Gr4DXrW8Aw4Dtw4fAF1rtFb_yoW7Zr45p3 W5G345tr48t3y2vrWFqF4ku3WaqrWFqw1qkF95W393ZF1jgwnYyFyYyr4aqFyYgrsYkF1S kw4UKF43ArZY9rDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDUYxBIdaVFxhVjvjDU0xZFpf9x0zRRRRiUUUUU= X-CM-SenderInfo: 5mdpv2pkrqwzphlzt0bj6rjloofrz/1tbirxwzrWgBwHqN3QAAsu Content-Type: text/plain; charset="utf-8" SCX_EV_ENQ_SLICE_DFL gives the impression that the event only occurs when the tasks were enqueued, which seems not accurate. What it actually means is the refilling with defalt slice, and this can occur either when enqueue or pick_task. Let's change the variable to SCX_EV_REFILL_SLICE_DFL. Signed-off-by: Honglei Wang --- v2: - refine the comments base on Andrea's suggestion. --- kernel/sched/ext.c | 22 +++++++++++----------- tools/sched_ext/scx_qmap.bpf.c | 4 ++-- 2 files changed, 13 insertions(+), 13 deletions(-) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 66bcd40a28ca..2a091ea23328 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -1517,10 +1517,10 @@ struct scx_event_stats { s64 SCX_EV_ENQ_SKIP_MIGRATION_DISABLED; =20 /* - * The total number of tasks enqueued (or pick_task-ed) with a - * default time slice (SCX_SLICE_DFL). + * Total number of times a task's time slice was refilled with the + * default value (SCX_SLICE_DFL). */ - s64 SCX_EV_ENQ_SLICE_DFL; + s64 SCX_EV_REFILL_SLICE_DFL; =20 /* * The total duration of bypass modes in nanoseconds. @@ -2197,7 +2197,7 @@ static void do_enqueue_task(struct rq *rq, struct tas= k_struct *p, u64 enq_flags, */ touch_core_sched(rq, p); p->scx.slice =3D SCX_SLICE_DFL; - __scx_add_event(SCX_EV_ENQ_SLICE_DFL, 1); + __scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1); local_norefill: dispatch_enqueue(&rq->scx.local_dsq, p, enq_flags); return; @@ -2205,7 +2205,7 @@ static void do_enqueue_task(struct rq *rq, struct tas= k_struct *p, u64 enq_flags, global: touch_core_sched(rq, p); /* see the comment in local: */ p->scx.slice =3D SCX_SLICE_DFL; - __scx_add_event(SCX_EV_ENQ_SLICE_DFL, 1); + __scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1); dispatch_enqueue(find_global_dsq(p), p, enq_flags); } =20 @@ -3296,7 +3296,7 @@ static struct task_struct *pick_task_scx(struct rq *r= q) p =3D prev; if (!p->scx.slice) { p->scx.slice =3D SCX_SLICE_DFL; - __scx_add_event(SCX_EV_ENQ_SLICE_DFL, 1); + __scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1); } } else { p =3D first_local_task(rq); @@ -3313,7 +3313,7 @@ static struct task_struct *pick_task_scx(struct rq *r= q) scx_warned_zero_slice =3D true; } p->scx.slice =3D SCX_SLICE_DFL; - __scx_add_event(SCX_EV_ENQ_SLICE_DFL, 1); + __scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1); } } =20 @@ -3399,7 +3399,7 @@ static int select_task_rq_scx(struct task_struct *p, = int prev_cpu, int wake_flag if (cpu >=3D 0) { p->scx.slice =3D SCX_SLICE_DFL; p->scx.ddsp_dsq_id =3D SCX_DSQ_LOCAL; - __scx_add_event(SCX_EV_ENQ_SLICE_DFL, 1); + __scx_add_event(SCX_EV_REFILL_SLICE_DFL, 1); } else { cpu =3D prev_cpu; } @@ -4413,7 +4413,7 @@ static ssize_t scx_attr_events_show(struct kobject *k= obj, at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_DISPATCH_KEEP_LAST); at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_ENQ_SKIP_EXITING); at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_ENQ_SKIP_MIGRATION_D= ISABLED); - at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_ENQ_SLICE_DFL); + at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_REFILL_SLICE_DFL); at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_BYPASS_DURATION); at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_BYPASS_DISPATCH); at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_BYPASS_ACTIVATE); @@ -5148,7 +5148,7 @@ static void scx_dump_state(struct scx_exit_info *ei, = size_t dump_len) 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_ENQ_SKIP_MIGRATION_DISABLED); - scx_dump_event(s, &events, SCX_EV_ENQ_SLICE_DFL); + scx_dump_event(s, &events, SCX_EV_REFILL_SLICE_DFL); 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); @@ -7313,7 +7313,7 @@ __bpf_kfunc void scx_bpf_events(struct scx_event_stat= s *events, 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_ENQ_SKIP_MIGRATION_DISABLED); - scx_agg_event(&e_sys, e_cpu, SCX_EV_ENQ_SLICE_DFL); + scx_agg_event(&e_sys, e_cpu, SCX_EV_REFILL_SLICE_DFL); 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); diff --git a/tools/sched_ext/scx_qmap.bpf.c b/tools/sched_ext/scx_qmap.bpf.c index 26c40ca4f36c..c3cd9a17d48e 100644 --- a/tools/sched_ext/scx_qmap.bpf.c +++ b/tools/sched_ext/scx_qmap.bpf.c @@ -784,8 +784,8 @@ static int monitor_timerfn(void *map, int *key, struct = bpf_timer *timer) scx_read_event(&events, SCX_EV_DISPATCH_KEEP_LAST)); bpf_printk("%35s: %lld", "SCX_EV_ENQ_SKIP_EXITING", scx_read_event(&events, SCX_EV_ENQ_SKIP_EXITING)); - bpf_printk("%35s: %lld", "SCX_EV_ENQ_SLICE_DFL", - scx_read_event(&events, SCX_EV_ENQ_SLICE_DFL)); + bpf_printk("%35s: %lld", "SCX_EV_REFILL_SLICE_DFL", + scx_read_event(&events, SCX_EV_REFILL_SLICE_DFL)); bpf_printk("%35s: %lld", "SCX_EV_BYPASS_DURATION", scx_read_event(&events, SCX_EV_BYPASS_DURATION)); bpf_printk("%35s: %lld", "SCX_EV_BYPASS_DISPATCH", --=20 2.45.2