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Tue, 7 Jan 2020 16:57:21 +0100 From: Gregory Esnaud To: "kvm@vger.kernel.org" Subject: [Newbie question] Why usage of CPU inside VM and outside VM is different Thread-Topic: [Newbie question] Why usage of CPU inside VM and outside VM is different Thread-Index: AdXFchc6k6fghFvyR2Cb2NX5qpnvFQ== Date: Tue, 7 Jan 2020 15:57:21 +0000 Message-ID: <8254fdfcfb7c4a82a5fc7a309152528e@exfo.com> Accept-Language: fr-FR, en-US Content-Language: fr-FR X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.72.130.123] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:81.255.187.177;IPV:CAL;SCL:-1;CTRY:FR;EFV:NLI;SFV:NSPM;SFS:(10009020)(4636009)(396003)(346002)(376002)(39850400004)(136003)(189003)(199004)(8936002)(316002)(36906005)(8676002)(26826003)(478600001)(81156014)(81166006)(2906002)(70586007)(70206006)(6916009)(108616005)(24736004)(2616005)(26005)(356004)(186003)(7696005)(5660300002)(4744005)(86362001)(336012)(36756003)(426003);DIR:OUT;SFP:1101;SCL:1;SRVR:CY4PR11MB1255;H:ON_Mail.exfo.com;FPR:;SPF:Pass;LANG:en;PTR:extranet.astellia.com;MX:1;A:1; X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: ff151c9d-1a88-41d9-c197-08d7938a48f9 X-MS-TrafficTypeDiagnostic: CY4PR11MB1255: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:9508; X-Forefront-PRVS: 027578BB13 X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: OMCLrpacFF772OPDM4g418MuZREiAY+6usDk1eiIT/GMCULd7fUxW1oY/Z9+58m0cYycKiqsJsMnhLYbDb0883iHBtAgniLWHbXVTawedgAA5vZvB/YN5+1HjvFSL3u16/mAFwTs+36UmWD8AZmodry3ihctkvNVEIK8ZbU0xYUrLA4N6UI9ZsKXSGBmQDyksyd+8QCeJp+xrnZI35MTpHpx0V8swNLSJlPI/zbKnJA6JeATLD3ekUgHIeEC8zGaJOjJIn0QmEcNNWLZsHFXKZxVcF6zpeG9m+sUwobifP8Mup50LezMvmdIgdItGK7Qm0hJw47ffKMb4mxjYS56fkXEteAD2V5jp60TKRCNXul+26o4VAKgc4SY5zSydyFv+e7dCvB/pT3ETh/dYPfPntiPBaWYZhwX13uG6dddS7Qg9K66gj4PLv0stvbFL54t X-OriginatorOrg: EXFO.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 07 Jan 2020 15:57:23.1969 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ff151c9d-1a88-41d9-c197-08d7938a48f9 X-MS-Exchange-CrossTenant-Id: 1c75be0f-2569-4bcc-95f7-3ad9d904f42a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=1c75be0f-2569-4bcc-95f7-3ad9d904f42a;Ip=[81.255.187.177];Helo=[ON_Mail.exfo.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR11MB1255 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Hello dear ML! We have deployed our application on an openstack RedHat platform with a KVM= integration. Our VM have 14 vCPU 'reserved'. >From an hypervisor (via top command) point of view our VM is consuming 9 CP= U (900%). This was reported by our platform provider. >From a VM point of view we are consuming only 2 CPU (200%), with a top also= . Our provider claim us to explain why we are consuming so much CPU. But we c= annot troubleshoot the infra as it's not our responsibility. From our point= of view, everything is ok. Would you please give any bugs/config/whatever that could help us to drive = our provider to a misconfiguration or whatever? Thanks very much, Greg