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charset="us-ascii" MIME-Version: 1.0 X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: DM8PR11MB5749.namprd11.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2cc78ed0-317a-463a-f50b-08db0df6f53c X-MS-Exchange-CrossTenant-originalarrivaltime: 13 Feb 2023 19:17:33.0273 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 46c98d88-e344-4ed4-8496-4ed7712e255d X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: Q82mpCmZGzI77IWyiPex52u0wrc6Bfo7L8+vr3/fPeCob/L8SKqG0+7eZG/UkoJJKMywJXzrPpDx6SHqb0LlRKijdW/on9+fTGZ17LTCwuc= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY8PR11MB7685 X-OriginatorOrg: intel.com Content-Transfer-Encoding: quoted-printable X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_NONE,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: Hello Tom, >The linux kernel commit 670638477aed ("perf/x86/intel/pt: Opportunistically >use single range output mode"), added in version v5.5.0 had a bug that was >fixed by commit ce0d998be927 ("perf/x86/intel/pt: Fix sampling using >single range output") in version 6.1.0. > >The bug manifested for intel microarchitectures Rocket Lake, Raptor Lake a= nd >Alder Lake. Actually, it's a h/w bug that got exposed by using single-range output. It= affects Core processors starting from Ice Lake and it only affects Processor Trace.= Also, it is only exposed by the py-record-btrace test, which does a lot of single= -stepping. It might be better to just add an XFAIL for that one test. I'm not sure if= maintaining a processor list makes sense. The kernel patch disables single-range for >= 1 page for all processors and does not try to maintain a list of affected processo= rs. We might want to do the same in GDB and either disable that test for kernels between= 5.5 and 6.1, or setup an XFAIL. The Branch Trace Store issue you found seems to affect all btrace tests on = ADL E-cores. This is a different issue. I can reproduce it and I am currently= debugging it. Regards, Markus. 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