From nobody Mon Feb 9 16:01:38 2026 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 EB8001B0408 for ; Fri, 31 Jan 2025 07:10:36 +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=1738307438; cv=none; b=ARvlrUsVsPkQcYjFenRMW8aZJRamQtRP62qLfcaTV0Bcw4mxvjoPcSIPJlrAVjC16zK07ZWxiqhju0Xc3AjnBO9mE4Xc8cP7l0aXlqm7pHaCgJsJhCFiGwsge6aZVBwraG1A33NObYRHoi2CH6KfFSiMwOr+aPLmGzzlT3R+Cr8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1738307438; c=relaxed/simple; bh=EFRN06YrP7HFKEdVqjzP/kCbiwK4F1EK5Ov4W3EfMrc=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=C+71JdXUr7cilUc0BNxCNsygtAdJE2brRAKEvWH8dMJXEbtO06j1+r8/nMvrzguZK2yT9jJ2pgo4KygHx/S3fxGBVBYJje6ri5g7k6esXeJOCLaIRPGKRKgGboTQvI3M+WJUzJU+52oOzAOiKD64+UvwvmAO+mCkMyPvvTuvsgA= 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=pfIltwQl; 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="pfIltwQl" 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=pfIltwQl+7OLaT/lqix49Y39oK 3p88BcpXfVY8zBUUmtAiS2cAnO8/I/azujspX7VoF5hPvNekZQYf1i8/xiJCGMMR9XJNM8MfiwZFx wmdSbtu4U7W24QlyeD6yqVxiGpvh/sJquhZi5UNZiCjkWnrtjkpFxK5tpR7tjCWjCqsqYZbZDQpgZ CdppNsKBr8ECv0i/GhqRWoSNLWXhUiv0UZxdUuuFRcrdHqgexgSuDDM5LAop3SD0ssH71vyCtNw67 pPQF5jfhvZerGmrarm4nVZIO4WKmqkjh83vuHfqVFusN6V6unhYt5QE9riqsAcT5KOw2JU+rEgFfT fplRuNCg==; 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 1tdlAW-001Kad-SL; Fri, 31 Jan 2025 08:10:31 +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 v3 10/11] sched_ext: Print core event count in scx_central scheduler Date: Fri, 31 Jan 2025 16:09:37 +0900 Message-ID: <20250131070938.95551-11-changwoo@igalia.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250131070938.95551-1-changwoo@igalia.com> References: <20250131070938.95551-1-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