From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 50C4FC433F5 for ; Fri, 3 Dec 2021 21:31:29 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1383251AbhLCVew (ORCPT ); Fri, 3 Dec 2021 16:34:52 -0500 Received: from mga03.intel.com ([134.134.136.65]:15695 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1353975AbhLCVen (ORCPT ); Fri, 3 Dec 2021 16:34:43 -0500 X-IronPort-AV: E=McAfee;i="6200,9189,10187"; a="237000626" X-IronPort-AV: E=Sophos;i="5.87,284,1631602800"; d="scan'208";a="237000626" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Dec 2021 13:31:16 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.87,284,1631602800"; d="scan'208";a="598116257" Received: from skl-02.jf.intel.com ([10.54.74.28]) by FMSMGA003.fm.intel.com with ESMTP; 03 Dec 2021 13:31:14 -0800 From: Tim Chen To: Peter Zijlstra Cc: Tim Chen , Arjan Van De Ven , Ricardo Neri , Len Brown , Srinivas Pandruvada , Artem Bityutskiy , Chen Yu , Song Bao Hua , yangyicong , Michael Larabel , linux-kernel@vger.kernel.org Subject: [PATCH 2/5] scheduler: Add SD_CLUSTER topology flag to cluster sched domain Date: Fri, 3 Dec 2021 12:32:39 -0800 Message-Id: X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add SD_CLUSTER to flag cluster sched domain topology. Scheduler needs to know if a topology level is at cluster level. It can then decide if cluster sched domain should be built based on boot or run time configuration specified in next patch. Signed-off-by: Tim Chen --- include/linux/sched/sd_flags.h | 7 +++++++ include/linux/sched/topology.h | 2 +- kernel/sched/topology.c | 3 +++ 3 files changed, 11 insertions(+), 1 deletion(-) diff --git a/include/linux/sched/sd_flags.h b/include/linux/sched/sd_flags.h index 57bde66d95f7..2321f1b4cee6 100644 --- a/include/linux/sched/sd_flags.h +++ b/include/linux/sched/sd_flags.h @@ -164,3 +164,10 @@ SD_FLAG(SD_OVERLAP, SDF_SHARED_PARENT | SDF_NEEDS_GROUPS) * NEEDS_GROUPS: No point in preserving domain if it has a single group. */ SD_FLAG(SD_NUMA, SDF_SHARED_PARENT | SDF_NEEDS_GROUPS) + +/* + * Domain members in the same CPU cluster + * + * NEEDS_GROUPS: Cluster resroucres are shared between groups. + */ +SD_FLAG(SD_CLUSTER, SDF_NEEDS_GROUPS) diff --git a/include/linux/sched/topology.h b/include/linux/sched/topology.h index a6ad1e02e57a..d71e75f03619 100644 --- a/include/linux/sched/topology.h +++ b/include/linux/sched/topology.h @@ -45,7 +45,7 @@ static inline int cpu_smt_flags(void) #ifdef CONFIG_SCHED_CLUSTER static inline int cpu_cluster_flags(void) { - return SD_SHARE_PKG_RESOURCES; + return SD_CLUSTER | SD_SHARE_PKG_RESOURCES; } #endif diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c index ee6b14ad3324..0c11531a64a0 100644 --- a/kernel/sched/topology.c +++ b/kernel/sched/topology.c @@ -1504,6 +1504,8 @@ static unsigned long __read_mostly *sched_numa_onlined_nodes; * function: * * SD_SHARE_CPUCAPACITY - describes SMT topologies + * SD_CLUSTER - describes multiple CPU clusters in a + * last level cache * SD_SHARE_PKG_RESOURCES - describes shared caches * SD_NUMA - describes NUMA topologies * @@ -1514,6 +1516,7 @@ static unsigned long __read_mostly *sched_numa_onlined_nodes; */ #define TOPOLOGY_SD_FLAGS \ (SD_SHARE_CPUCAPACITY | \ + SD_CLUSTER | \ SD_SHARE_PKG_RESOURCES | \ SD_NUMA | \ SD_ASYM_PACKING) -- 2.20.1