From nobody Sun Dec 14 14:17:53 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 E110522B8CD for ; Thu, 16 Jan 2025 15:16:30 +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=1737040592; cv=none; b=OxxKyM3j1hYl8qoNP4z86v7P9w/Uxfy/jp6gm0gVlzf0F4HDPVWamz2EqGtCjgHVDe+10kuV8BxdFme2Om6PvXFQg1vYu9FB7ZWWWqORFv3xsv/palLoRmvZwtQtuEevJB6t8WPblWMy/q16J4RUwBxPRdhGdjERX1cxlrX78tY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1737040592; c=relaxed/simple; bh=/IJH4/RbnwUGtB3Br4x8sBywU5fFRGmSRoYvMNYPEd4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=aMElz51cLRb8v2aCxWc4hn6UvVDDUHNuZRZh5kgYjqjO7f7Dv7usRm/7Bk3lc7RelW+p4Yo4OOzoVnrK+WPAbZVpTr1VzCmJKLdi5nvYLfDr4/+JaK+AdpiDomkl9gNa+7cxsmSEdMGwcomXlUSKCCitGNzWTBp2D9AmD7o1jqA= 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=OYEYBxza; 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="OYEYBxza" 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=n03m1gDZ+bi2/4h851sCqFa64jr1IiJSC7KZVSMTN6w=; b=OYEYBxzaTe7KmM1EX5OSHrpflW ffWH8kZSJbKQF8X44JDCOuGtAn+gHkbihTSn47XwI8o38nhuAI9GDtACsB4ZPxjF3DhMZPNsWMRZd pWBzhGu31LAoeeoXgtyXUlBNFewMPq2I4Fh0Hcfh6B5JthvhYThtK9Het3pSgqTORkjpbrge6WWzE 0gxlmi4Yx5B2FSav6gWDjvwR/0fHJn/Q8TygR4CIxVJ3DGWV5g7wTpXe0E6qOHcRwXMvodUIsD0Cv s7+0K8+M66r3CZoIUgJxH9xpq+tmLhwrruTdpf+deen9hUIFPz3hOamX98/28Jozk4hfw3bz/pSjg UQ9xOaQw==; 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 1tYRba-00Gi18-K3; Thu, 16 Jan 2025 16:16:23 +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 3/7] sched_ext: Add an event, SCX_EVENT_CNTD_RUN_WO_ENQ Date: Fri, 17 Jan 2025 00:15:39 +0900 Message-ID: <20250116151543.80163-4-changwoo@igalia.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250116151543.80163-1-changwoo@igalia.com> References: <20250116151543.80163-1-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_EVENT_CNTD_RUN_WO_ENQ, which represents how many times a task is continued to run without ops.enqueue() when SCX_OPS_ENQ_LAST is not set. Signed-off-by: Changwoo Min --- kernel/sched/ext.c | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index 8054e4e5ed0c..909f12a41934 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -1473,6 +1473,12 @@ struct scx_event_stat { * the meantime. In this case, the task is bounced to the global DSQ. */ u64 OFFLINE_LOCAL_DSQ; + + /* + * If SCX_OPS_ENQ_LAST is not set, the number of times that a task + * continued to run because there were no other tasks on the CPU. + */ + u64 CNTD_RUN_WO_ENQ; }; =20 #define SCX_EVENT_IDX(e) (offsetof(struct scx_event_stat, e)/sizeof(u64)) @@ -1486,12 +1492,14 @@ enum scx_event_kind { SCX_EVENT_BEGIN =3D 0, SCX_EVENT_DEFINE(INVAL_SELECT_CPU), SCX_EVENT_DEFINE(OFFLINE_LOCAL_DSQ), + SCX_EVENT_DEFINE(CNTD_RUN_WO_ENQ), SCX_EVENT_END =3D SCX_EVENT_END_IDX(), }; =20 static const char *scx_event_stat_str[] =3D { [SCX_EVENT_INVAL_SELECT_CPU] =3D "invalid_select_cpu", [SCX_EVENT_OFFLINE_LOCAL_DSQ] =3D "offline_local_dsq", + [SCX_EVENT_CNTD_RUN_WO_ENQ] =3D "cntd_run_wo_enq", }; =20 /* @@ -2914,6 +2922,7 @@ static int balance_one(struct rq *rq, struct task_str= uct *prev) if (prev_on_rq && (!static_branch_unlikely(&scx_ops_enq_last) || scx_rq_bypassing(rq))) { rq->scx.flags |=3D SCX_RQ_BAL_KEEP; + scx_add_event(CNTD_RUN_WO_ENQ, 1); goto has_tasks; } rq->scx.flags &=3D ~SCX_RQ_IN_BALANCE; --=20 2.48.1