From patchwork Wed Jun 14 01:12:56 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Sun X-Patchwork-Id: 9785149 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 E22606038E for ; Wed, 14 Jun 2017 01:28:14 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D55D028419 for ; Wed, 14 Jun 2017 01:28:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CA18628539; Wed, 14 Jun 2017 01:28:14 +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 50E3828472 for ; Wed, 14 Jun 2017 01:28:14 +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 1dKx4m-0008Kk-BX; Wed, 14 Jun 2017 01:26:28 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dKx4k-0008IK-J1 for xen-devel@lists.xenproject.org; Wed, 14 Jun 2017 01:26:26 +0000 Received: from [85.158.139.211] by server-4.bemta-5.messagelabs.com id 07/8F-02181-1C090495; Wed, 14 Jun 2017 01:26:25 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrALMWRWlGSWpSXmKPExsVywNykWPfgBId Ig+8dIhbft0xmcmD0OPzhCksAYxRrZl5SfkUCa8b0mStYCqaoV2zY+o+xgfGwQhcjF4eQwDRG ia0bt7N0MXJySAjwShxZNoMVwvaTaD61iRGiqIFR4veaiWBFbALqEo+/9jCB2CICShL3Vk1mA iliFtjJJLHu9HdmkISwgIPEuY232EFsFgFVie5Hz8EaeAU8JbY0X2SE2CAncfLYZLBtnEDx7t fPwGqEBDwkfl6ZyjSBkXcBI8MqRo3i1KKy1CJdI0O9pKLM9IyS3MTMHF1DA1O93NTi4sT01Jz EpGK95PzcTYzAkKhnYGDcwXh3st8hRkkOJiVR3iV2DpFCfEn5KZUZicUZ8UWlOanFhxhlODiU JHjD+4FygkWp6akVaZk5wOCESUtw8CiJ8Na2AaV5iwsSc4sz0yFSpxgVpcR5I0H6BEASGaV5c G2wiLjEKCslzMvIwMAgxFOQWpSbWYIq/4pRnINRSZj3OMgUnsy8Erjpr4AWMwEtvn7FBmRxSS JCSqqB0WYpe7/HLi9rxkSr7I02k8xvxmofbF0v7la5zb2pclvwvR+8fLUPvtTcdm2Ztq2t+QK j775XNULvr7Akcraq9GwvWvCIccWryPVWjle3b59yaGO0zseSomP/m28knV18dPFigZLLk4Wv 5y1PuLPLZFLkQWfzWf+OnN4irNGx46njR3NB5cAzkUosxRmJhlrMRcWJAD8umJCDAgAA X-Env-Sender: yi.y.sun@linux.intel.com X-Msg-Ref: server-16.tower-206.messagelabs.com!1497403511!87398197!24 X-Originating-IP: [192.55.52.115] X-SpamReason: No, hits=0.5 required=7.0 tests=BODY_RANDOM_LONG X-StarScan-Received: X-StarScan-Version: 9.4.19; banners=-,-,- X-VirusChecked: Checked Received: (qmail 935 invoked from network); 14 Jun 2017 01:26:24 -0000 Received: from mga14.intel.com (HELO mga14.intel.com) (192.55.52.115) by server-16.tower-206.messagelabs.com with DHE-RSA-AES256-GCM-SHA384 encrypted SMTP; 14 Jun 2017 01:26:24 -0000 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga103.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 13 Jun 2017 18:26:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.39,340,1493708400"; d="scan'208";a="99174100" Received: from vmmmba-s2600wft.bj.intel.com ([10.240.193.64]) by orsmga002.jf.intel.com with ESMTP; 13 Jun 2017 18:26:20 -0700 From: Yi Sun To: xen-devel@lists.xenproject.org Date: Wed, 14 Jun 2017 09:12:56 +0800 Message-Id: <1497402776-22348-24-git-send-email-yi.y.sun@linux.intel.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1497402776-22348-1-git-send-email-yi.y.sun@linux.intel.com> References: <1497402776-22348-1-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, roger.pau@citrix.com Subject: [Xen-devel] [PATCH v12 23/23] 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 | 18 ++++++++++++------ 2 files changed, 34 insertions(+), 9 deletions(-) diff --git a/docs/man/xl.pod.1.in b/docs/man/xl.pod.1.in index 78bf884..db951c0 100644 --- a/docs/man/xl.pod.1.in +++ b/docs/man/xl.pod.1.in @@ -1716,6 +1716,9 @@ 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] @@ -1740,7 +1743,7 @@ 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. @@ -1750,7 +1753,7 @@ 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 @@ -1767,6 +1770,11 @@ 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. @@ -1777,10 +1785,21 @@ 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..04dd957 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 @@ -107,7 +107,7 @@ System CAT information such as maximum COS and CBM length can be obtained by: The simplest way to change a domain's CBM from its default is running: -`xl psr-cat-cbm-set [OPTIONS] ` +`xl psr-cat-set [OPTIONS] ` where cbm is a number to represent the corresponding cache subset can be used. A cbm is valid only when: @@ -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) @@ -172,13 +178,13 @@ options is invalid. Example: Setting code CBM for a domain: -`xl psr-cat-cbm-set -c ` +`xl psr-cat-set -c ` Setting data CBM for a domain: -`xl psr-cat-cbm-set -d ` +`xl psr-cat-set -d ` Setting the same code and data CBM for a domain: -`xl psr-cat-cbm-set ` +`xl psr-cat-set ` ## Reference