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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?b2diSUorK0hnaFRtcWxablRDWU02UW1TeGU4bHpqdkNHL2tTNUorbHZ6cmxR?= =?utf-8?B?WWZMcjJrVmJweWY0ckhIZXJPWFlHRVJ1MGhnd20xZHV5NUZ0QjNIcGhweTA1?= =?utf-8?B?UlBobTBiemQrM0M4Q2hKdlBXcnpaWktSeCtwUHk5MjQyRFU0S3R5YzliaC85?= =?utf-8?B?M2x6YWhDMHozeWV5bWJ5bUpZTGV0cTZ3b3BvNDBuRVlxUTQvZ0Q1ajRSWTRi?= =?utf-8?B?ZUZ6ckliNE43Ui9pNVdFUTExc0V0TFczVUpVeFltWWdCQWNmaHNSRzdHbWxM?= =?utf-8?B?UUg0Z0Z0L2Rsb0VSQ1VzVGtkRlRjd0JGeFVGeHZvTndaSUtkSjAxa21FSWVE?= =?utf-8?B?QlpOUUkzQ1lvakhKemZJNTQ0OVJiSnA5WlVIazU3M3RJTmVNOENJV1Z5YUdU?= =?utf-8?B?VGd3bFdwc05kdG1SaWhrSlJ0aG4wOGUxdmRhUXBUMkRrUHNXY3FaMC9nUU9s?= =?utf-8?B?dUVIOWVXbTA0WVNsMlQzb2dxWlVGbW9pU3VUaDBXS2M5V1NYWVZBMmg3TzBC?= =?utf-8?B?THRWUGZGZy9RRjhyOWV5QStPUndUUzNWQUxBNG1qUm1GREVyWmsva04wdjFo?= =?utf-8?B?OFlNU1lLWVJLNGE0UlVkM1h4UDcveWlYaEQvNXhYblNhN3hCbHIrdEpTQmZZ?= =?utf-8?B?VFhuenVBNzIvRGFlb1kvbzRJUDBBdVZuUWRmcmlVWGc3UFdYSUx0VVFadjZv?= =?utf-8?B?Q0Vud0RiREhNcmM2MzRpbEo5YmMrdm5xUVcyRldUMllybjdaeE43aGd3L3lv?= =?utf-8?B?R0Z6eW1Gc25ybGtNMmZKNU5nOEZSelRkL1lMSEY0THB4RnE1WGZ1ZG8wYnZs?= =?utf-8?B?K2lYUjhkYTFTU2poZk5uMHVsTUFxbTZBRGxSaXloTlJGbXhkSVpqckVIVDZo?= =?utf-8?B?SHIrV1NsVVZ4dzJlbmtKTFFUTk1GZkR2ZGx5bHlvaW45MWF1K0xISlJoZk40?= =?utf-8?B?OW5KWHJvTWt4U3BtT2tWdXJEUU1ub3RORk0rTHZvcGVUci9HQzBUYkNkWnJ4?= =?utf-8?B?UFVsQXJYQnRPK2F4Q1ZsV1ExZzRpN3lIWUQvWDJBN1lxT1hQaElDOGg0c1J2?= =?utf-8?B?SEU4QVdHUDJYbHlEUlBacnBaa1ZveDVmWW1HWFBCSlhPRXJnbzVROE5RMXFI?= =?utf-8?B?RG1USjFlK1E0QVZ4eTRINWVZUWZpZWRxNkozLzAvcGY3NEV4QWgxUmJvREVY?= =?utf-8?B?M2pkdVdCL2lCbi9oL2J2SE9kcm1NbnFWMkpLUVJRZGNXRVFLRzNVNTR0eEVN?= =?utf-8?B?WXVNYXdJNENrMWp1QkNmQTlDZ3VDSWlSbE5hdk9lcXZ3ekNHenhBMHU5U0l0?= =?utf-8?B?NzhtZExFWTRmVHZXN3NTYU5jWGtHN2dHc2ZUaGVOU1IyV0tvY1hFKzJIckUr?= =?utf-8?B?cWRoYjFsZXE3dHRFcS9vZnZEcVk5N2xpbFhJZkV4a3Zpcm9mWHBydW9jRncr?= =?utf-8?B?SS8xRE5Nb1VIUEo5b2V3eG5NOFFSZmhad1B6NTlrM3FtVEV3ajRPaTgvWENo?= =?utf-8?B?WVdMSWhyaEtVL1Z0bkpFMjNVd1IyWGVZS0s1emQ2eHk3SVlCYkc1ODNQS1Q3?= =?utf-8?B?alhSdFVqQlRZQXBTMFVibjRIYlB4SGFKRHZXbUlJcXpTODY1WnhjbVpvVzIy?= =?utf-8?B?SlRGVjU0WmI0L1BzZUM5WlJjeWZKc1BGQ3dXNlVGZnhrQnRNdnhuSTh1dnRr?= =?utf-8?B?OWI3MEd1R2pheXBabS85WXoxTWZwU2RRcndXUExBUGFlUnMwSzBORjYwL25G?= =?utf-8?Q?VuGR9mdP9qN904OXBnAHxYSYvTVGdTiCamyyip6?= X-OriginatorOrg: suse.com X-MS-Exchange-CrossTenant-Network-Message-Id: 5464e0fd-82ce-41ef-ca60-08d94c369330 X-MS-Exchange-CrossTenant-AuthSource: VI1PR04MB5600.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 21 Jul 2021 10:59:13.2388 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: f7a17af6-1c5c-4a36-aa8b-f5be247aa4ba X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: dEf0LQWsYHQzzQqzt+AIs2RGUevIiRox+fs5ZuvqvZ4vS08v3jGQR2aJSAvnavSIjJfkO+2sRXltYNdjtWO/xQ== X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR04MB5325 On 21.07.2021 11:29, James Dingwall wrote: > We have a system which intermittently starts up and reports an incorrect cpu frequency: > > # grep -i mhz /var/log/kern.log > Jul 14 17:47:47 dom0 kernel: [ 0.000475] tsc: Detected 2194.846 MHz processor > Jul 14 22:03:37 dom0 kernel: [ 0.000476] tsc: Detected 2194.878 MHz processor > Jul 14 23:05:13 dom0 kernel: [ 0.000478] tsc: Detected 2194.848 MHz processor > Jul 14 23:20:47 dom0 kernel: [ 0.000474] tsc: Detected 2194.856 MHz processor > Jul 14 23:57:39 dom0 kernel: [ 0.000476] tsc: Detected 2194.906 MHz processor > Jul 15 01:04:09 dom0 kernel: [ 0.000476] tsc: Detected 2194.858 MHz processor > Jul 15 01:27:15 dom0 kernel: [ 0.000482] tsc: Detected 2194.870 MHz processor > Jul 15 02:00:13 dom0 kernel: [ 0.000481] tsc: Detected 2194.924 MHz processor > Jul 15 03:09:23 dom0 kernel: [ 0.000475] tsc: Detected 2194.892 MHz processor > Jul 15 03:32:50 dom0 kernel: [ 0.000482] tsc: Detected 2194.856 MHz processor > Jul 15 04:05:27 dom0 kernel: [ 0.000480] tsc: Detected 2194.886 MHz processor > Jul 15 05:00:38 dom0 kernel: [ 0.000473] tsc: Detected 2194.914 MHz processor > Jul 15 05:59:33 dom0 kernel: [ 0.000480] tsc: Detected 2194.924 MHz processor > Jul 15 06:22:31 dom0 kernel: [ 0.000474] tsc: Detected 2194.910 MHz processor > Jul 15 17:52:57 dom0 kernel: [ 0.000474] tsc: Detected 2194.854 MHz processor > Jul 15 18:51:36 dom0 kernel: [ 0.000474] tsc: Detected 2194.900 MHz processor > Jul 15 19:07:26 dom0 kernel: [ 0.000478] tsc: Detected 2194.902 MHz processor > Jul 15 19:43:56 dom0 kernel: [ 0.000154] tsc: Detected 6895.384 MHz processor Well, this is output from Dom0. What we'd need to see (in addition) is the corresponding hypervisor log at maximum verbosity (loglvl=all). > The xen 's' debug output: > > (XEN) TSC marked as reliable, warp = 0 (count=4) > (XEN) dom1: mode=0,ofs=0x1d1ac8bf8e,khz=6895385,inc=1 > (XEN) dom2: mode=0,ofs=0x28bc24c746,khz=6895385,inc=1 > (XEN) dom3: mode=0,ofs=0x345696b138,khz=6895385,inc=1 > (XEN) dom4: mode=0,ofs=0x34f2635f31,khz=6895385,inc=1 > (XEN) dom5: mode=0,ofs=0x3581618a7d,khz=6895385,inc=1 > (XEN) dom6: mode=0,ofs=0x3627ca68b2,khz=6895385,inc=1 > (XEN) dom7: mode=0,ofs=0x36dd491860,khz=6895385,inc=1 > (XEN) dom8: mode=0,ofs=0x377a57ea1a,khz=6895385,inc=1 > (XEN) dom9: mode=0,ofs=0x381eb175ce,khz=6895385,inc=1 > (XEN) dom10: mode=0,ofs=0x38cab2e260,khz=6895385,inc=1 > (XEN) dom11: mode=0,ofs=0x397fc47387,khz=6895385,inc=1 > (XEN) dom12: mode=0,ofs=0x3a552762a0,khz=6895385,inc=1 > > A processor from /proc/cpuinfo in dom0: > > processor : 3 > vendor_id : GenuineIntel > cpu family : 6 > model : 85 > model name : Intel(R) Xeon(R) D-2123IT CPU @ 2.20GHz > stepping : 4 > microcode : 0x2000065 > cpu MHz : 6895.384 > [...] > > Xen has been built at 310ab79875cb705cc2c7daddff412b5a4899f8c9 from the stable-4.12 branch. While this contradicts the title, both 4.11 and 4.12 are out of general support. Hence it would be more helpful if you could obtain respective logs with a more modern version of Xen - ideally from the master branch, or else the most recent stable one (4.15). Provided of course the issue continues to exist there in the first place. Jan