From nobody Sun Dec 14 11:35:36 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; d=subspace.kernel.org; s=arc-20240116; t=1738646492; cv=none; b=jWk8BumLzCFL6on1lEcGuN6k3sgkMeaSSh6+0BAm7hqIiZX3MrIWC8V3ZH+qLg+l8LKksHD8glWFbRcia7aZVHyv4yEWuO6NYkhu05e7pT3eZFDBapWJVEnrpDyD3ytqlEo6yHdNhLbCCCZcfEqtAncmdYxtUoCzVB8as5sM874= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738646492; c=relaxed/simple; bh=0zO4mzU89XZcHygErnqGdtfH4bgG1UUoHnYwzYtDlhY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KjaSbeiuw1Rl5btcz8VYIHZhd62qRntcRn1HYHAg7KVNs/cnpb7hZR7cY0tmEV61/lFGltRKGz5uGd6LONsd4DyECpMY4mvhex4pOfwfY8c4P2CODjUOb+HvwA0mijDVE/syjXkI93MwiEeYudEZWcgaLd4LgQmQo0ys0+Upbxc= 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=bDav7Xkj; 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="bDav7Xkj" 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=XWUZUB7dEkdjPX3TEON8I8RpFQFPW1DHkKvNFPFf/hI=; b=bDav7XkjjeqveKDFb8+9rp3ldP QJofScKy/hvfu/Eah6cM85Dv/R/8mMXCTgUJfGD/IwtmwxquChC0y4y+deoDZc8dmAKzqdzspFlmJ quqwWCPKnWLNVLlhSOgMef4PCB+Z1U43y5qjkUANnGL4FLKfnBKtDskl2Yf/0LnWxq8tKItpzim4K gPZFEBw7CarflOfa2eQ1hdU5BLQKT0m7NSnEntpXUzCbDYHdgq+EMzr3TvtUlAo5SfZRFZh2UUUpk 7+thFfhm34cYSFrBPg+spfLFMkBW9aKBcfz1nEn92tMvIRXojg1EYRUw024L+60S1g3L5ozIzl9cW /PGqjTrA==; 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 1tfBN9-003J23-UG; 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); } --=20 2.48.1