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 3EA6CE7AD76 for ; Tue, 3 Oct 2023 16:08:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231521AbjJCQIR (ORCPT ); Tue, 3 Oct 2023 12:08:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37000 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235282AbjJCQIQ (ORCPT ); Tue, 3 Oct 2023 12:08:16 -0400 Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.31]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 655089E; Tue, 3 Oct 2023 09:08:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1696349293; x=1727885293; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=GxY6djkdXGLXDWuW+6GGDFodlat750WRBGDESi40hYk=; b=JysLfR1vIuLvK61WxrqTk03gGQMSY5TQCHr+8awuksgt3+0rVHvQ241v jUefVYd5TP+kDV92nfb0MoCTcE9wJ3WKjbdWUXTyHQQ62+xmh+BS31My4 haO9hn9oRcFXWuxLMw04TsLwYEalRSqWQiHuzHgOfOtSSzKBzha9l8f5a elVZaFEn4atd1oPd/ViHrFdMNgrDIMnHzsaHv0xwnEs5bDiLSWiXg114U SsqpAYUnC9J8a0KgpeDYoxr+Qy4HxDntzsZItvey1ryR1rel90XlEh41t +DVIrQlTy/YgoDgD4QfYOsMlYi9xn6hIFoG5eFIYlhh6ETQgiZIqZQI9y A==; X-IronPort-AV: E=McAfee;i="6600,9927,10852"; a="447083215" X-IronPort-AV: E=Sophos;i="6.03,197,1694761200"; d="scan'208";a="447083215" Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Oct 2023 09:08:10 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10852"; a="998098083" X-IronPort-AV: E=Sophos;i="6.03,197,1694761200"; d="scan'208";a="998098083" Received: from agluck-desk3.sc.intel.com ([172.25.222.74]) by fmsmga006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Oct 2023 09:08:09 -0700 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , Shuah Khan , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , Randy Dunlap , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v7 0/8] Add support for Sub-NUMA cluster (SNC) systems Date: Tue, 3 Oct 2023 09:07:51 -0700 Message-ID: <20231003160800.8601-1-tony.luck@intel.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230928191350.205703-1-tony.luck@intel.com> References: <20230928191350.205703-1-tony.luck@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org The Sub-NUMA cluster feature on some Intel processors partitions the CPUs that share an L3 cache into two or more sets. This plays havoc with the Resource Director Technology (RDT) monitoring features. Prior to this patch Intel has advised that SNC and RDT are incompatible. Some of these CPU support an MSR that can partition the RMID counters in the same way. This allows for monitoring features to be used (with the caveat that memory accesses between different SNC NUMA nodes may still not be counted accuratlely. Note that this patch series improves resctrl reporting considerably on systems with SNC enabled, but there will still be some anomalies for processes accessing memory from other sub-NUMA nodes. Signed-off-by: Tony Luck Tony Luck (8): x86/resctrl: Prepare for new domain scope x86/resctrl: Prepare to split rdt_domain structure x86/resctrl: Prepare for different scope for control/monitor operations x86/resctrl: Split the rdt_domain and rdt_hw_domain structures x86/resctrl: Add node-scope to the options for feature scope x86/resctrl: Introduce snc_nodes_per_l3_cache x86/resctrl: Sub NUMA Cluster detection and enable x86/resctrl: Update documentation with Sub-NUMA cluster changes Documentation/arch/x86/resctrl.rst | 23 +- include/linux/resctrl.h | 85 +++-- arch/x86/include/asm/msr-index.h | 1 + arch/x86/kernel/cpu/resctrl/internal.h | 66 ++-- arch/x86/kernel/cpu/resctrl/core.c | 400 +++++++++++++++++----- arch/x86/kernel/cpu/resctrl/ctrlmondata.c | 58 ++-- arch/x86/kernel/cpu/resctrl/monitor.c | 58 ++-- arch/x86/kernel/cpu/resctrl/pseudo_lock.c | 14 +- arch/x86/kernel/cpu/resctrl/rdtgroup.c | 132 +++---- 9 files changed, 591 insertions(+), 246 deletions(-) base-commit: 6465e260f48790807eef06b583b38ca9789b6072 -- 2.41.0