From nobody Sun Feb 8 23:25:54 2026 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 66F4AEB64DD for ; Wed, 21 Jun 2023 17:41:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231419AbjFURlA (ORCPT ); Wed, 21 Jun 2023 13:41:00 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43706 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230195AbjFURkm (ORCPT ); Wed, 21 Jun 2023 13:40:42 -0400 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BB2A8F1; Wed, 21 Jun 2023 10:40:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1687369241; x=1718905241; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=r5UMYKpVO7CH5T1tFztMST9Hrba8NtQtdvEfQNwuWZQ=; b=DCoHPGXZKn/ckg3zWJDtlg6os+RX5UYy5B/A1AGWMSwp4nYv+gaYJ72S 7Ly6gt5NwJjIp7HzE6wytPUHwOXcyB2Ang6XNeWsDgBEgcWPtR5QBL75+ 8mpdz5Rpu2wqyYX8GPoCJnoxBIw1WwicMmk6Os+gcPoqZvw0a6nbKX8Zu j7c7BoAnXqT+jmdwVeMDnduEoyiSKllEliJ+MJAZKaNC8mIz7gXFXxQ9Q U40XSWcOX4vmMHsQ2zNHq5YBaoJ9nv42NhlHx44LDGfSAtZvGqkUqgz0p EqUxluo9eMI2VqHsT3Y4mF414raPLV0wIm2ldKh6mmwdP/7OQbqtcusUU g==; X-IronPort-AV: E=McAfee;i="6600,9927,10748"; a="359120553" X-IronPort-AV: E=Sophos;i="6.00,261,1681196400"; d="scan'208";a="359120553" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2023 10:40:17 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10748"; a="779921580" X-IronPort-AV: E=Sophos;i="6.00,261,1681196400"; d="scan'208";a="779921580" Received: from agluck-desk3.sc.intel.com ([172.25.222.74]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Jun 2023 10:40:17 -0700 From: Tony Luck To: Fenghua Yu , Reinette Chatre , Peter Newman , Jonathan Corbet , x86@kernel.org Cc: Shaopeng Tan , James Morse , Jamie Iles , Babu Moger , linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, patches@lists.linux.dev, Tony Luck Subject: [PATCH v2 6/7] x86/resctrl: Update documentation with Sub-NUMA cluster changes Date: Wed, 21 Jun 2023 10:40:05 -0700 Message-Id: <20230621174006.42533-7-tony.luck@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230621174006.42533-1-tony.luck@intel.com> References: <20230621174006.42533-1-tony.luck@intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" With Sub-NUMA Cluster mode enabled the scope of monitoring resources is per-NODE instead of per-L3 cache. Suffixes of directories with "L3" in their name refer to Sub-NUMA nodes instead of L3 cache ids. Signed-off-by: Tony Luck --- Documentation/arch/x86/resctrl.rst | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) diff --git a/Documentation/arch/x86/resctrl.rst b/Documentation/arch/x86/re= sctrl.rst index cb05d90111b4..13fc9fa664fc 100644 --- a/Documentation/arch/x86/resctrl.rst +++ b/Documentation/arch/x86/resctrl.rst @@ -345,9 +345,13 @@ When control is enabled all CTRL_MON groups will also = contain: When monitoring is enabled all MON groups will also contain: =20 "mon_data": - This contains a set of files organized by L3 domain and by - RDT event. E.g. on a system with two L3 domains there will - be subdirectories "mon_L3_00" and "mon_L3_01". Each of these + This contains a set of files organized by L3 domain or by NUMA + node (depending on whether Sub-NUMA Cluster (SNC) mode is disabled + or enabled respectively) and by RDT event. E.g. on a system with + SNC mode disabled with two L3 domains there will be subdirectories + "mon_L3_00" and "mon_L3_01" the numerical suffix refers to the + L3 cache id. With SNC enabled the directory names are the same, + but the numerical suffix refers to the node id. Each of these directories have one file per event (e.g. "llc_occupancy", "mbm_total_bytes", and "mbm_local_bytes"). In a MON group these files provide a read out of the current value of the event for --=20 2.40.1