From patchwork Wed Dec 14 04:08:04 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Sun X-Patchwork-Id: 9474049 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 D305160823 for ; Wed, 14 Dec 2016 11:12:58 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C80C428713 for ; Wed, 14 Dec 2016 11:12:58 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B908E2871F; Wed, 14 Dec 2016 11:12:58 +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=-2.7 required=2.0 tests=BAYES_00, DATE_IN_PAST_06_12, 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 2477628713 for ; Wed, 14 Dec 2016 11:12:58 +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 1cH7SW-0006RT-IX; Wed, 14 Dec 2016 11:10:52 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cH7SU-0006PE-LT for xen-devel@lists.xenproject.org; Wed, 14 Dec 2016 11:10:50 +0000 Received: from [85.158.143.35] by server-2.bemta-6.messagelabs.com id 1F/9C-22326-AB821585; Wed, 14 Dec 2016 11:10:50 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFnrLLMWRWlGSWpSXmKPExsXS1tYhobtTIzD C4OB9JYvvWyYzOTB6HP5whSWAMYo1My8pvyKBNePXwUVsBTcVKuZ+fcHewDhfuouRk0NIoELi w8JZLCC2hACvxJFlM1ghbD+Jqy9aGbsYuYBqGhglPt1vAStiE1CXePy1hwnEFhFQkri3ajITS BGzQDeTxMqHW4GKODiEBewlti2NBalhEVCVWHJyPzOIzSvgIXHh5WFGiAVyEiePTWYFKecEiv /bkghxj7vExd537BMYeRcwMqxi1ChOLSpLLdI1MtZLKspMzyjJTczM0TU0MNPLTS0uTkxPzUl MKtZLzs/dxAgMBgYg2MH4Z37gIUZJDiYlUV6uqwERQnxJ+SmVGYnFGfFFpTmpxYcYZTg4lCR4 Z6kHRggJFqWmp1akZeYAwxImLcHBoyTCG6QClOYtLkjMLc5Mh0idYlSUEuddCdInAJLIKM2Da 4PFwiVGWSlhXkagQ4R4ClKLcjNLUOVfMYpzMCoJ824AmcKTmVcCN/0V0GImoMWiS/xBFpckIq SkGhgnh03K1zmQc+bzsu//mkrFnM6u+hDH739MpcX01M+3Sx5dj36ZcbNPlptx6au1E/L1H// XkxILePfWWFpGenX9Gg+OtUG862ye3wzUUatf8E3hoaP51e8mH3JF+VXOyZVanfZ31XqdKWzC wP+6Mk3+umx0se7+BTWXRblYXSfeL996i2XZ6Y1KLMUZiYZazEXFiQA+OGesgAIAAA== X-Env-Sender: yi.y.sun@linux.intel.com X-Msg-Ref: server-12.tower-21.messagelabs.com!1481713769!48240089!25 X-Originating-IP: [134.134.136.24] X-SpamReason: No, hits=0.0 required=7.0 tests=sa_preprocessor: VHJ1c3RlZCBJUDogMTM0LjEzNC4xMzYuMjQgPT4gMzkwOTcx\n X-StarScan-Received: X-StarScan-Version: 9.1.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 28999 invoked from network); 14 Dec 2016 11:10:49 -0000 Received: from mga09.intel.com (HELO mga09.intel.com) (134.134.136.24) by server-12.tower-21.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 14 Dec 2016 11:10:49 -0000 Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga102.jf.intel.com with ESMTP; 14 Dec 2016 03:10:48 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.33,346,1477983600"; d="scan'208";a="39863445" Received: from vmmmba-s2600wft.bj.intel.com ([10.240.193.63]) by orsmga004.jf.intel.com with ESMTP; 14 Dec 2016 03:10:46 -0800 From: Yi Sun To: xen-devel@lists.xenproject.org Date: Wed, 14 Dec 2016 12:08:04 +0800 Message-Id: <1481688484-5093-25-git-send-email-yi.y.sun@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1481688484-5093-1-git-send-email-yi.y.sun@linux.intel.com> References: <1481688484-5093-1-git-send-email-yi.y.sun@linux.intel.com> Cc: 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 v4 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 --- 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 8e2aa5b..2c41ea7 100644 --- a/docs/man/xl.pod.1.in +++ b/docs/man/xl.pod.1.in @@ -1701,6 +1701,9 @@ 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] @@ -1725,7 +1728,7 @@ 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. @@ -1735,7 +1738,7 @@ 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 @@ -1752,6 +1755,11 @@ 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. @@ -1762,10 +1770,21 @@ 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)