From nobody Thu Mar 13 08:35:06 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 B43C824BBF6 for ; Fri, 14 Feb 2025 09:58:01 +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=1739527086; cv=none; b=uHgpToRxdD9h5dLnlIDeXg9RNkUVjy9L/wnGlWPkCRq3E4ql/GFiUW6ZUk8SrdiGwzFvapwvDq5+6rZk77XblZciTkxEIHPpoA+K9Pt4w7TkeBDppG4zxaK6ZlMUkdN7UOV9jb0tYXL6MspIQFlL4jN2ZvAFGuX68h3AuW11RBw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739527086; c=relaxed/simple; bh=47WKjJcwQWvsK1nkHibsYhis9CdASrT+Q8dQk4j5ZuA=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=RldKQ2iqTmqP7/IyHuc3lVK9qhaaDVX9XvnedMaHHQAySeDWw31htoIrmHd+p6nv0SRL2uPJV7r5qRU+HumZyw3rEP7JltkTliYozFmA5sS8IiTrbGIuihDHVs2UyykEMKSBHvAuHrzEhASSS0mL0/+Y+a8SEc2jvVyGXR8hDbg= 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=o6xcTAiq; 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="o6xcTAiq" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=igalia.com; s=20170329; h=Content-Transfer-Encoding:MIME-Version: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: In-Reply-To:References:List-Id:List-Help:List-Unsubscribe:List-Subscribe: List-Post:List-Owner:List-Archive; bh=YsVVftDpo1mgprsCaOUgA8Avd4mgoql5Qv3tMRR7rsM=; b=o6xcTAiqHiV2pPP/dgrmWTXin5 emYU8O2LedoV9llc3HVQt3seMZ34n9KdYN2ld1wRi2OQqUzx4+YbJhZ6qxVn2x+Vj5jorEqSaUbvq yGw0phEnSveIAJrltzRj6u4EoGi1F6SlHzfNk2FoJ7B3SrDQ7de+qoaxV4PrnRF1ox4RrbgiLsDyv 2yPs/Vrd+k2PUynumDJjrhSZbZXeXb/NNVnV9brPHePnueAJtgGDX70I6CRY/1yTSHVt+FSzLGPzm CZ3iZdydMSDC/LuwyzVMH1PtgkX43+2/tXFZX1o8S/3t9l0mkYciOWrRc8a9lioUWyWdpPjVkDKT5 lrVIfQfw==; 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 1tisS8-00HNmX-9y; Fri, 14 Feb 2025 10:57:50 +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 v2] sched_ext: Provides a sysfs 'events' to expose core event counters Date: Fri, 14 Feb 2025 18:57:36 +0900 Message-ID: <20250214095736.76693-1-changwoo@igalia.com> X-Mailer: git-send-email 2.48.1 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 sysfs entry at /sys/kernel/sched_ext/root/events to expose core event counters through the files system interface. Each line of the file shows the event name and its counter value. In addition, the format of scx_dump_event() is adjusted as the event name gets longer. Signed-off-by: Changwoo Min --- ChangeLog v1 -> v2: - Change the format of the output to the simpler form, "%s %llu\n". - Move the 'events' under the root/ subdir following the lifecycle of an scx scheduler. kernel/sched/ext.c | 27 ++++++++++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 0c5120c6381c..4f88b782886e 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -1576,7 +1576,7 @@ static DEFINE_PER_CPU(struct scx_event_stats, event_s= tats_cpu); * @kind: a kind of event to dump */ #define scx_dump_event(s, events, kind) do { \ - dump_line(&(s), "%30s: %16llu", #kind, (events)->kind); \ + dump_line(&(s), "%40s: %16llu", #kind, (events)->kind); \ } while (0) =20 =20 @@ -4383,8 +4383,33 @@ static ssize_t scx_attr_ops_show(struct kobject *kob= j, } SCX_ATTR(ops); =20 +#define scx_attr_event_show(buf, at, events, kind) ({ \ + sysfs_emit_at(buf, at, "%s %llu\n", #kind, (events)->kind); \ +}) + +static ssize_t scx_attr_events_show(struct kobject *kobj, + struct kobj_attribute *ka, char *buf) +{ + struct scx_event_stats events; + int at =3D 0; + + scx_bpf_events(&events, sizeof(events)); + at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_SELECT_CPU_FALLBACK); + at +=3D scx_attr_event_show(buf, at, &events, SCX_EV_DISPATCH_LOCAL_DSQ_O= FFLINE); + 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_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); + return at; +} +SCX_ATTR(events); + static struct attribute *scx_sched_attrs[] =3D { &scx_attr_ops.attr, + &scx_attr_events.attr, NULL, }; ATTRIBUTE_GROUPS(scx_sched); --=20 2.48.1