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Thu, 08 May 2025 10:02:25 -0700 (PDT) MIME-Version: 1.0 References: <90aac2a4-0a4f-4d2a-a90f-c96c9be820af@efficios.com> In-Reply-To: <90aac2a4-0a4f-4d2a-a90f-c96c9be820af@efficios.com> Date: Thu, 8 May 2025 18:02:12 +0100 X-Gm-Features: ATxdqUHVK2QVn1-2E_5iK9UsJn9qR5krnPklYTpAZf7ES6nUAJKkPQR9_fKkSnc Message-ID: Subject: Re: Not capturing ust events To: Kienan Stewart Cc: lttng-dev@lists.lttng.org Content-Type: text/plain; charset="UTF-8" X-Mailman-Approved-At: Thu, 08 May 2025 17:30:47 -0400 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: David Aldrich via lttng-dev Reply-To: David Aldrich Errors-To: lttng-dev-bounces@lists.lttng.org Sender: "lttng-dev" 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). 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? Best regards David