From patchwork Mon Feb 13 06:32:36 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Sun X-Patchwork-Id: 9568869 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 86E8C6045D for ; Mon, 13 Feb 2017 06:38:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 75DD62818E for ; Mon, 13 Feb 2017 06:38:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6AABB281DB; Mon, 13 Feb 2017 06:38:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C5A772818E for ; Mon, 13 Feb 2017 06:38:12 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cdAFj-0006xN-Uf; Mon, 13 Feb 2017 06:36:47 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cdAFi-0006u1-HF for xen-devel@lists.xenproject.org; Mon, 13 Feb 2017 06:36:46 +0000 Received: from [85.158.143.35] by server-2.bemta-6.messagelabs.com id B1/4A-22326-DF351A85; Mon, 13 Feb 2017 06:36:45 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrHLMWRWlGSWpSXmKPExsXS1tbhqPs3eGG EwfNnwhbft0xmcmD0OPzhCksAYxRrZl5SfkUCa8b+TpOCRsWKD7fXsDUwHpbuYuTiEBKYziix 4kEncxcjJ4eEAK/EkWUzWCFsf4lXWxYxQhQ1MErcmHUPrIhNQF3i8dceJhBbREBJ4t6qyUwgR cwCi5gkVkz6zgaSEBawl1j4rJ8dxGYRUJW4fbQfrIFXwENix90mqG1yEiePTQbbxgkUP3LoPS OILSTgLtG/axPLBEbeBYwMqxjVi1OLylKLdE31kooy0zNKchMzc3QNDcz0clOLixPTU3MSk4r 1kvNzNzECw4EBCHYwTr/sf4hRkoNJSZS32n5hhBBfUn5KZUZicUZ8UWlOavEhRhkODiUJXg1g eAkJFqWmp1akZeYAAxMmLcHBoyTC2wOS5i0uSMwtzkyHSJ1iVJQS5zUGSQiAJDJK8+DaYNFwi VFWSpiXEegQIZ6C1KLczBJU+VeM4hyMSsK8VUFAU3gy80rgpr8CWswEtNj1wVyQxSWJCCmpBs ZZSzsCMlbsWj1vWSkv46pHu+fKHLwyN6SORUtI5UapkEafqPyRI62CHteK1F/MeLKpKSLm7W0 thcOKL0IuZrdOi9f/+n5Tg1Mjd/zEFQWHow8tmLn/c+zrl+Juaqp1jGaszQplx6Pzpn14Ieix pu5tE0dArOCy2pAfyqrzakRffWurDV3Ta6PEUpyRaKjFXFScCABdyD6/gQIAAA== X-Env-Sender: yi.y.sun@linux.intel.com X-Msg-Ref: server-16.tower-21.messagelabs.com!1486967780!52889311!10 X-Originating-IP: [134.134.136.65] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 9.2.3; banners=-,-,- X-VirusChecked: Checked Received: (qmail 26810 invoked from network); 13 Feb 2017 06:36:44 -0000 Received: from mga03.intel.com (HELO mga03.intel.com) (134.134.136.65) by server-16.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 13 Feb 2017 06:36:44 -0000 Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 12 Feb 2017 22:36:44 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.35,155,1484035200"; d="scan'208";a="224551856" Received: from vmmmba-s2600wft.bj.intel.com ([10.240.193.63]) by fmsmga004.fm.intel.com with ESMTP; 12 Feb 2017 22:36:41 -0800 From: Yi Sun To: xen-devel@lists.xenproject.org Date: Mon, 13 Feb 2017 14:32:36 +0800 Message-Id: <1486967556-3702-25-git-send-email-yi.y.sun@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1486967556-3702-1-git-send-email-yi.y.sun@linux.intel.com> References: <1486967556-3702-1-git-send-email-yi.y.sun@linux.intel.com> Cc: kevin.tian@intel.com, wei.liu2@citrix.com, andrew.cooper3@citrix.com, dario.faggioli@citrix.com, he.chen@linux.intel.com, ian.jackson@eu.citrix.com, Yi Sun , mengxu@cis.upenn.edu, jbeulich@suse.com, chao.p.peng@linux.intel.com Subject: [Xen-devel] [PATCH v7 24/24] docs: add L2 CAT description in docs. X-BeenThere: xen-devel@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" X-Virus-Scanned: ClamAV using ClamSMTP This patch adds L2 CAT description in related documents. Signed-off-by: He Chen Signed-off-by: Yi Sun Acked-by: Wei Liu --- docs/man/xl.pod.1.in | 25 ++++++++++++++++++++++--- docs/misc/xl-psr.markdown | 10 ++++++++-- 2 files changed, 30 insertions(+), 5 deletions(-) diff --git a/docs/man/xl.pod.1.in b/docs/man/xl.pod.1.in index 7caed08..5e7676e 100644 --- a/docs/man/xl.pod.1.in +++ b/docs/man/xl.pod.1.in @@ -1711,6 +1711,9 @@ occupancy monitoring share the same set of underlying monitoring service. Once a domain is attached to the monitoring service, monitoring data can be shown for any of these monitoring types. +There is no cache monitoring and memory bandwidth monitoring on L2 cache so +far. + =over 4 =item B [I] @@ -1735,7 +1738,7 @@ monitor types are: Intel Broadwell and later server platforms offer capabilities to configure and make use of the Cache Allocation Technology (CAT) mechanisms, which enable more -cache resources (i.e. L3 cache) to be made available for high priority +cache resources (i.e. L3/L2 cache) to be made available for high priority applications. In the Xen implementation, CAT is used to control cache allocation on VM basis. To enforce cache on a specific domain, just set capacity bitmasks (CBM) for the domain. @@ -1745,7 +1748,7 @@ Intel Broadwell and later server platforms also offer Code/Data Prioritization applications. CDP is used on a per VM basis in the Xen implementation. To specify code or data CBM for the domain, CDP feature must be enabled and CBM type options need to be specified when setting CBM, and the type options (code -and data) are mutually exclusive. +and data) are mutually exclusive. There is no CDP support on L2 so far. =over 4 @@ -1762,6 +1765,11 @@ B Specify the socket to process, otherwise all sockets are processed. +=item B<-l LEVEL>, B<--level=LEVEL> + +Specify the cache level to process, otherwise the last level cache (L3) is +processed. + =item B<-c>, B<--code> Set code CBM when CDP is enabled. @@ -1772,10 +1780,21 @@ Set data CBM when CDP is enabled. =back -=item B [I] +=item B [I] [I] Show CAT settings for a certain domain or all domains. +B + +=over 4 + +=item B<-l LEVEL>, B<--level=LEVEL> + +Specify the cache level to process, otherwise the last level cache (L3) is +processed. + +=back + =back =head1 IGNORED FOR COMPATIBILITY WITH XM diff --git a/docs/misc/xl-psr.markdown b/docs/misc/xl-psr.markdown index c3c1e8e..bd2b6bd 100644 --- a/docs/misc/xl-psr.markdown +++ b/docs/misc/xl-psr.markdown @@ -70,7 +70,7 @@ total-mem-bandwidth instead of cache-occupancy). E.g. after a `xl psr-cmt-attach Cache Allocation Technology (CAT) is a new feature available on Intel Broadwell and later server platforms that allows an OS or Hypervisor/VMM to -partition cache allocation (i.e. L3 cache) based on application priority or +partition cache allocation (i.e. L3/L2 cache) based on application priority or Class of Service (COS). Each COS is configured using capacity bitmasks (CBM) which represent cache capacity and indicate the degree of overlap and isolation between classes. System cache resource is divided into numbers of @@ -119,13 +119,19 @@ A cbm is valid only when: In a multi-socket system, the same cbm will be set on each socket by default. Per socket cbm can be specified with the `--socket SOCKET` option. +In different systems, the different cache level is supported, e.g. L3 cache or +L2 cache. Per cache level cbm can be specified with the `--level LEVEL` option. + Setting the CBM may not be successful if insufficient COS is available. In such case unused COS(es) may be freed by setting CBM of all related domains to its default value(all-ones). Per domain CBM settings can be shown by: -`xl psr-cat-show` +`xl psr-cat-show [OPTIONS] ` + +In different systems, the different cache level is supported, e.g. L3 cache or +L2 cache. Per cache level cbm can be specified with the `--level LEVEL` option. ## Code and Data Prioritization (CDP)