From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca by simark.ca with LMTP id SF1BKvzoHGjobxoAWB0awg (envelope-from ) for ; Thu, 08 May 2025 13:25:16 -0400 Authentication-Results: simark.ca; dkim=pass (2048-bit key; unprotected) header.d=lists.lttng.org header.i=@lists.lttng.org header.a=rsa-sha256 header.s=default header.b=jE5rBSZI; dkim-atps=neutral Received: by simark.ca (Postfix, from userid 112) id 9C39D1E10E; Thu, 8 May 2025 13:25:16 -0400 (EDT) X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-25) on simark.ca X-Spam-Level: X-Spam-Status: No, score=-6.8 required=5.0 tests=ARC_SIGNED,ARC_VALID,BAYES_00, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE,RCVD_IN_VALIDITY_CERTIFIED,RCVD_IN_VALIDITY_RPBL, RCVD_IN_VALIDITY_SAFE autolearn=ham autolearn_force=no version=4.0.1 Received: from lists.lttng.org (lists.lttng.org [158.69.130.29]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPS id B7E361E089 for ; Thu, 8 May 2025 13:25:15 -0400 (EDT) ARC-Filter: OpenARC Filter v1.2.1 lists.lttng.org 4ZtfCb1DjYz1myF ARC-Seal: i=2; d=lists.lttng.org; s=arc1; a=rsa-sha256; cv=fail; t=1746725115; b=M0g9r0Ir9TwsQYzXmYTne05S9oMkvbH2TI0RUmCDEwglPV6Lho2rjKq0cpI5KofGv+wd ECWEq+aJ+qT8wGK4Osuarb1wPR1rKd3iBxxeoHre7wPaFCySh3ema0LcBoLJ6Aou5iwZm sStGKVznV5+qL5By/eiusdn7A8dIrjniT2MAxwyA43gdwmgTcXXI2eEXvVQaVedLeY7aS log3HH7R+JvZktzagsPDeEgJW7YegGCMsn7loizIsp+0Nb4m8fG5KXyRv9r1MtOPEe66f tc/TbAejwN2dzPCEbFNlvCP2uMJjtwNHBFDhaOWlcQ3X42Zdu0bF763+ZC+RENwy/kQ== ARC-Message-Signature: i=2; d=lists.lttng.org; s=arc1; a=rsa-sha256; c=relaxed/simple; t=1746725115; h=DKIM-Signature:Message-ID:Date:Subject:To:MIME-Version:From:From; bh=UjAQincqxIRWSVT/8O/+/UKkGGMFkVvLJOJThfKFGEc=; b=dVkr2ZNLQ4aRIomSNPvzsW0tpXSiRKUTb2VYjYHxsXu8KdYXhwi5OtD9aziL9gNZZHtU FbaZF8UBS46rAid86oly8PMHR1XfBn2Wtr8wPmOMc0DQ3D+L8xcj/KPq+sKCKJ9eFBlaw DYQLBcJNHxhPkY13BPG42AEpTS92L6rFBWKnLFukXg8YL3PriRGwWC11oPUAMoIOGGZxg LPE8kRh71MIyAyT+5P2xv6otT29YL60zZiUPnQBngN3srUoyvWzKqhGm50NnjX8h0UjEZ op8sw4aiJtWIYkqo6AefJ7DfS4evPRDWs+yDs5ns5lzWRrjyVOMlvUl3Noio2PibqQA== ARC-Authentication-Results: i=2; lists.lttng.org; arc=fail smtp.remote-ip="::1" DKIM-Filter: OpenDKIM Filter v2.11.0 lists.lttng.org 4ZtfCb1DjYz1myF DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lists.lttng.org; s=default; t=1746725115; bh=UjAQincqxIRWSVT/8O/+/UKkGGMFkVvLJOJThfKFGEc=; h=Date:Subject:To:Cc:References:In-Reply-To:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=jE5rBSZIup0z8HGy0+nz+b8nKYY/PZQE9aTdPfffgcE5R6VVgg5DS6dvvqeHjWD6D jjldfbDvHKdgCQ3VjS0T+AHy7eYFi3HBhwheKpo2f+Q67RGeWVlnmeIsZ6UFeL5oF0 tO+Hqu0W9rkD5Yj+f4ZUutDKzyrO3T7tduuiDb++svZT1ZGW0cYw41k5L8zlV9CSEc sDVtoh8wFuszDWJ4NYLBL8TK6aZFSdYHSysM+234Lw8YsD4F9bxPfkhbFekUOCcMK4 oaBLIzpszcQ+SccwKn6FhqNxopMR8sgFha1qSqOd+5bYrhBXhoQesRzVFttmMSc6m6 qIDoNPXqujt5A== Received: from lists-lttng01.efficios.com (localhost [IPv6:::1]) by lists.lttng.org (Postfix) with ESMTP id 4ZtfCb1DjYz1myF; Thu, 8 May 2025 13:25:15 -0400 (EDT) ARC-Filter: OpenARC Filter v1.2.1 lists.lttng.org 4ZtfCY6xG1z1myD DKIM-Filter: OpenDKIM Filter v2.11.0 lists.lttng.org 4ZtfCY6xG1z1myD Received: from YT3PR01CU008.outbound.protection.outlook.com (mail-canadacentralazon11020087.outbound.protection.outlook.com [52.101.189.87]) by lists.lttng.org (Postfix) with ESMTPS id 4ZtfCY6xG1z1myD for ; Thu, 8 May 2025 13:25:13 -0400 (EDT) ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=jvacNcsy2ZyitjZyATFhso4CmrwN+uy0GscpOZYwEUCoiFMR2n4Ysp0ux66SO+xIebKWsbwvxJJ+IERcbXpEvawHhC6Vk21CMA4NAB1CCWEZoSoG+1WNBNuPrubcOCBYEyo8xiEfr6MI2kM4gwEuitTapoj9UMfpShL//RRBqf/KusqDTsLGjJX/xvWp8adgZfwZeMme7zPs6QO+t8A/bSgYh2VdnUjSy+EQ87jgKkezf1G5/JVXAMLYdJ9iHiA4VrNkgzvZZ2pCkA9QzPUVSOGccbJjZljwa4TwBcy8TY2gpEOR9r9KNmHXZEWDnxAKMfrgnr6EtMJoYHEXirhzhw== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=I14yXtXkGP1yTObQjxb2y6WQKlIIDrRxeRLNfAVJDuI=; b=mONt5s6Pbo9F9OpH7I+a1txCcnqOaL8owIo6DXgOsO0r9U7wNW3Fn9s6cs7xIJz1h34j0zJfyDa7+yBr4DlMYgEMaj+UwRDSLpoKfAYG86B+1jmjcTbMWO05r28z5fwYNtzcQPdMiYFVTXjrtM6OEK6UfJ/ZL1kGCuKpdAdd9UlSd5TPg8d3DOnZ5XxDjSbetJOdDb1LeM5NiZ1VyxFlR0tHhG9hq877dd+W2RafurC188vrkwIE3cxSaphgLsXnX1neH/teefkTI/Q6dxap4eIMDY3kB4+4GrE0BKc2Tsy+rj1JoisBzXpelXTVe4h9POetHuQIscM5YcQCcB5fpw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=efficios.com; dmarc=pass action=none header.from=efficios.com; dkim=pass header.d=efficios.com; arc=none Received: from YT4PR01MB10341.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:e8::14) by YT2PR01MB5367.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:52::10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8722.24; Thu, 8 May 2025 17:25:09 +0000 Received: from YT4PR01MB10341.CANPRD01.PROD.OUTLOOK.COM ([fe80::e27c:c1e2:e6e:9256]) by YT4PR01MB10341.CANPRD01.PROD.OUTLOOK.COM ([fe80::e27c:c1e2:e6e:9256%3]) with mapi id 15.20.8722.018; Thu, 8 May 2025 17:25:09 +0000 Message-ID: <0e6f9c3b-8daa-43ae-a3ee-6d7917b05b2e@efficios.com> Date: Thu, 8 May 2025 13:25:08 -0400 User-Agent: Mozilla Thunderbird Subject: Re: Not capturing ust events To: David Aldrich Cc: lttng-dev@lists.lttng.org References: <90aac2a4-0a4f-4d2a-a90f-c96c9be820af@efficios.com> Content-Language: en-US In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: YQBPR0101CA0271.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:c01:68::32) To YT4PR01MB10341.CANPRD01.PROD.OUTLOOK.COM (2603:10b6:b01:e8::14) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: YT4PR01MB10341:EE_|YT2PR01MB5367:EE_ X-MS-Office365-Filtering-Correlation-Id: 019ebedc-d4bb-4873-188a-08dd8e554824 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|366016|1800799024|376014; X-Microsoft-Antispam-Message-Info: =?utf-8?B?dkJBOXpBd1NaNUhlSGNDQ05CUEVhYk9jVm1uUUgwRTU2RlhjVS9ncENqd29t?= =?utf-8?B?eHV4Sk9NYjdLZE1tY00yaXl2WmZHdmFWaU1wQ0h2SDZkZ1NWeGJ4UnozT2cw?= =?utf-8?B?b0wzeXJjbmNyOEpyMUpNK09rVEs2VzhuOFIvREs2cDgzcC8wdTVYZ3Z4cU1N?= =?utf-8?B?QWk5eUhBRmUxOUdnVTU0Mnc5OTE3Q0RwS3RMWXlrUmNxYkVNcEFVSndwSXJy?= =?utf-8?B?bTRCOVBMNzNzcUtSYkREbXRmclRZWitobG9velFmZ3o0Q0pTS21MNWx3eWxU?= =?utf-8?B?a3FnZlhXZ04wMDZhaE9OT0prM051UmFkYmo5RzVGRTh1ZWlkTTM5a0xONXRN?= =?utf-8?B?TElrOUZISmN4TGVsWDQ4bmdYMzg4bXhsNDNMaTFNVWcxcEhjVHN6ekJIczVY?= =?utf-8?B?UTArUWF2NXFiamVSK0J3OFd2bUNtMVdGMlFySWZFcWRzY3UvT3c0cVBnN0hH?= =?utf-8?B?bnZXdkYrWFRNV2UwQmRNSDB2L2VKaVRDWC9QazduUGsxQTRBRkVlYWI2djdD?= =?utf-8?B?YkFNc3dNbDd2WVBJdlVra3IrQnQ1OHBVZnVoSE0vRTNUTm9ZMzc5QVBBWGdX?= =?utf-8?B?T3VHZFE5cEJxeDF5VVpReE9DcTdocXgwL0srMlRweHcwZkhPSDhNYldPN2Nh?= =?utf-8?B?eDlKNnRmcmovai9FRmN6bmF4UEREdkpWR0ZHR3orWDZSdlNsNlkzTVQ5SHI2?= =?utf-8?B?Z09SM0xCV2Jjc2UzMFZ3OE1wdHNva2t5cklRR2JhWGU0NnFTR1k3VU5paEJ3?= =?utf-8?B?MDBqV0lSNUNzSW80bElzZmlBNm5BVTlqYzRXWHl0WEo2ZHlwWWxQNFJLVnlr?= =?utf-8?B?L2tqdis5ejRlbHpudkhFaEZIc2Y1MHlqbzdGMlFWRzBUdFptVWt3RWtQWVUr?= =?utf-8?B?cVUwRnBkeEdsTlV2ajhiQU9JbDI4TVFpZk9wR243NlpjNDJnSi9xaW1EUUNV?= =?utf-8?B?T3dkem8zMTRqVFVNVVNteHZUYXJKalRweG9qcmdzVUJxaUJvaURUYTVxNk1F?= =?utf-8?B?K3VxREhLR250RzlOK0FHZjd1VkNqTjVaUDlUMnlIOW45d2pwdlNiODFleXcv?= =?utf-8?B?amoxWGJnT2JSaDhDMmRiSjRLYXVQcXZLRVhxNHkrUFhDNUNZNjVNOXFFdStO?= =?utf-8?B?aSsreGI3TWZkTnoweUE0VW1iMXZxSWlkZ25xdGt5RVJFanRuRVhkUC9zUVFn?= =?utf-8?B?cXgxU3J1WmZDWTlNTkptUkE0RTlDNkNCaXNrTHJBekVLbnFLQ010RExJTnpR?= =?utf-8?B?U3YzOE1zd1g2N253dzRCOHR0QVdJYy9vWCt0eWw2VW9JMkFPWVNpSGZUSGR4?= =?utf-8?B?RmhLeUs3VUhnZHMrcHFpT0ZxM3dTSWxqQmxQak1vbkhsN2FNbW5lam5GVHlL?= =?utf-8?B?UGxsVnlGRW5id3k0c3N6NXhxSUJHczBGcE5lMFB1T21CdWk4dUxqZThpZlB1?= =?utf-8?B?T2plaVNnZXo0ZEhFMVNCOHY1NzR3UFdKZE15ek41alJZYjhDVGxvcVhxOFN0?= =?utf-8?B?MVV5R0lZUTVaaVJmZitDTk40czFFa1JGdzN2RzJpU2RsaUdvSkhkNGtwSlFU?= =?utf-8?B?YVN4VVk0SXV1L1NDRzJRNHZsMnNyNVFTWVpMV0tPRG41SFFWTWNxUUJHVmNQ?= =?utf-8?B?ZHRQWHMxVG1sZVpKYUVOeTh2elV3Rno2ckoxcGdhZ2VnTEk5OTlMTUtkRzc2?= =?utf-8?B?a2Zua2pvWFc4bXQwYmtVZUZTOUR0V3FleFJaQUF6K21sVndON1U5WHJEZTFa?= =?utf-8?B?ZlpCUkE2emlOOVhDcGV1aGl1Ly9DNFVCdTVIS2RnT3NiWkIrWW96SzR2SlNM?= =?utf-8?Q?IZq7hLksHssD/NfwtwX+E6eWZ6sBEZK92An28=3D?= X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:YT4PR01MB10341.CANPRD01.PROD.OUTLOOK.COM; PTR:; CAT:NONE; SFS:(13230040)(366016)(1800799024)(376014); DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?aTgxNTlTRytRamtJOTVrSExWcTdEYkxrNTR4Q090ZVFFclhNdXd4VXNLOUl2?= =?utf-8?B?WjU3THdNaFZmelA5ZWFHVGloaS83dUJOdjBoaVVtbmlTQ3M1MWFOMk9EelhX?= =?utf-8?B?REhSa3B0cnE0bFI4MG0xTHhaazdHU3Z0SkVaKzlnQXMvckpYY0lZMWpRWkpm?= =?utf-8?B?MmxYTkhVbnZJcmNxRTF2dTN3WEd0NDVzcjJlQXgwOEFJSDRkWk4xcW9HQW5T?= =?utf-8?B?NlVTeEJ3dFF4cVNybXAxaVhhZkVjbnZQUUJLTVpZWVlmLzlseE54cmZYa0ZP?= =?utf-8?B?UUNKVkhpSWJ0S3FSaHBTcHVpa2tLRkRsWEV4ZERRaVFpNDIvZDR5cFpRNVJL?= =?utf-8?B?VDU4UFBrc2xLKzBvMzVDaVNKQWhUdEcxdXhjOWJ1ZXE2NkhvSk0vZjBUdS9n?= =?utf-8?B?emxGZWpURFV2U255dklTOCtlOGVpamE0ZW4vNk1GVTVMUi9tRUszT1o4cmZY?= =?utf-8?B?SjBUQmFUdE5NUWFRQ3NxVGRXNWJOSHBpU0tEcDV0aStZQlJEWWpOT3E3eFJH?= =?utf-8?B?cThZb3VqWUtCdWNDZytqVlAvb1ZadjhDenlVMHZKam9vK2hnN3FDbXlWVXRO?= =?utf-8?B?dklZS3BPNUVjRVZCQnBiWng2QXFUaU5TV2Q2Qkh3aHZpVzhTaXBSRWluQ0ly?= =?utf-8?B?NWMxUHd4ZXJESDBOSkc5NzlOVnBkMEx0TmNZeXg5OWR4bTQxNkpzbkdhMnFX?= =?utf-8?B?dGVzbWluZEJQYVdsaTI3d2ptb0FNejY0NE5qdUdvZXJ5MHhuQTRKcEJZVW8y?= =?utf-8?B?M2FrU3dIbW1YQTVHbkNPNEJ0OUtzc2M5SENHTUlNRnNNUGNvT1dyOFNHYXM3?= =?utf-8?B?UDRaWlN4NjFYTW44K1ZUUi9TTlc3bU8va1VVY25VbVRGeDZoYVdSc3ZzRG5P?= =?utf-8?B?Y1A1bUtyVVQxeUVLQ293SksxNE1Mb25ueDVya2x2aGRSWG5NMUt1M0NOb21L?= =?utf-8?B?RE9wZGQyOEJlSldlaWR4ZEJCZmozSkRRdHZ0TU5YUDl0RWlzSUg5VC8xcWVn?= =?utf-8?B?em0wN1hQWFE2RzlUVUc0TzRhTU5SRUhZTmxoWFJVNit4YTdkRmlmcmhsRCtI?= =?utf-8?B?WHhsVGE2Z3RGdUVZZFl0YkFFSTNIcnh0RzNabVUycEpZbnQxK21ka0RCZW5t?= =?utf-8?B?UkU5OHpxczhmdldVakV1dzRzbENzSDdVQzYvQzFvZEZBYUpOOFphRjhLczQ4?= =?utf-8?B?TWdCL0JUemhsMFQ0OWt6aGZwc094TlhxTldCNnJ5L0YyQXZvNzcrckVkb2x3?= =?utf-8?B?aXBIeldmUmZaemM2TitHRlZIVFB6WExqYWZ1ZVFXV0FHN3p6b0FZc3RibVFx?= =?utf-8?B?aXdRVGNVcHBEd01IUHk2RDJZc3dTTFU1NjQ2N2xTQXU0bGdvZjJxb3gvN2I0?= =?utf-8?B?TTFKRi9XOHdYN2U3em9JNkt3ZWNyYjhSMHhubFNYYS9wV0hQeTBrdllwWmt3?= =?utf-8?B?QWUzeUM3N0JuWGdyNWR2Uk5QZnZ2TEdIc0ZUVVNZS0xMNHpvZjB6cUlSbSsx?= =?utf-8?B?OGZucVFZeW9vYnR1MHo2cmdZTDNxWkF4bFhEcDVGMVgyYmdQN2NZTndxYklW?= =?utf-8?B?NHBIQ21CWkRjcVJReGNZWHRnUzNRSG9IQllpVDB3VGYzcTdWUHFWa2FiM2hq?= =?utf-8?B?QmdrQk8vVFh5TUtkcWZ6U2lOSEZ2NWEzWVlROXdEZFFSYTllNCtmbVFpVGZr?= =?utf-8?B?bmcvOCtHVWtRSDZLVjhJMWFLbW5ySzVGY2VrbGlzNFM4QVNxcUdqbnptSExl?= =?utf-8?B?RU03bEVTN2RkUG1maTNQZUdCYTdSN1JmaWJhN0dPSGNFTUxhdGs2MGx6RDRw?= =?utf-8?B?cDRuR0R5Zk9HcnBIaUpGc0hLZkVVNllkTytGMnRxc3lRSTZteXhlYXREelNR?= =?utf-8?B?VXM2NUIxRG9RTVFYZzJnN0JJM01iSDZ5dXBVYUtlQm1nT0FPS1BjOERVVEho?= =?utf-8?B?QjBBOW40QlhNM1pBU0VWWkFUNm5vWFk4Q0FOSDBmUmtRakk4d0lCREQ0aUdm?= =?utf-8?B?aFZXQ1JIc1FQT1JrbkttMUR4NWNoMSt0NWZ1Z0ZMQTlJUVVPVnM4NHJUQVRN?= =?utf-8?B?VW9NL3ZPK3FMQnZDSGlXVEhFK1V5QTRHL0ZiYWFreDFUeFV4UnRXS0k5ZTA2?= =?utf-8?Q?HcO6TcHJE1Hkx50m8azfr1Gfa?= X-OriginatorOrg: efficios.com X-MS-Exchange-CrossTenant-Network-Message-Id: 019ebedc-d4bb-4873-188a-08dd8e554824 X-MS-Exchange-CrossTenant-AuthSource: YT4PR01MB10341.CANPRD01.PROD.OUTLOOK.COM X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 May 2025 17:25:09.2201 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4f278736-4ab6-415c-957e-1f55336bd31e X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: WVKCAkiifwt0uHpcaNaaRYf6oqj6gxu9joYdJf47UScXnjBaxyGx50j5k8VcXlI5qy5LpOwJ+CMAqg0B+Dj+sg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: YT2PR01MB5367 X-BeenThere: lttng-dev@lists.lttng.org X-Mailman-Version: 2.1.39 Precedence: list List-Id: LTTng development list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Kienan Stewart via lttng-dev Reply-To: Kienan Stewart Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" Hi David, On 5/8/25 1:02 PM, David Aldrich wrote: > Hi Kienan > > Thanks very much for your reply. I can now capture UST events. (My > actual problem was that I was not linking to lttng-ust). > Glad you caught that. I had assumed it was linked in :) > I am now using the method you described: > >> lttng create my_proj >> lttng enable-event --userspace 'lttng_ust_tracef:*' >> lttng start >> ./my_app >> lttng stop >> lttng view # [Optional] > > This works and captures UST events but I am not capturing Kernel > events. My reason for running this experiment is that occasionally > our application shows glitches where a task takes longer than > expected. So I want to see what happens in that occurrence - perhaps > an ISR is running or something like that. So I assume that I need to > capture Kernel and UST events. > > Can you please advise me why Kernel events aren't being captured? > In the setup above, only a userspace channel is created. Assuming the user you are running the `lttng` commands with is a member of the tracing group and a root lttng-sessiond is running, a complete example might look like: ``` lttng create my_proj lttng enable-event --userspace 'lttng_ust_tracef:*' # this will automatically create a channel if one doesn't exist in the session lttng enable-channel --kernel --session my_proj kernel_channel # [1] lttng enable-event --kernel --all --channel kernel_channel --session my_proj # [2] lttng start ./my_app lttng stop lttng view ``` > Best regards > David thanks, kienan [1]: https://lttng.org/man/1/lttng-enable-channel/v2.13/ [2]: https://lttng.org/man/1/lttng-enable-event/v2.13/