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Thu, 08 May 2025 10:59:56 -0700 (PDT) MIME-Version: 1.0 References: <90aac2a4-0a4f-4d2a-a90f-c96c9be820af@efficios.com> <0e6f9c3b-8daa-43ae-a3ee-6d7917b05b2e@efficios.com> In-Reply-To: <0e6f9c3b-8daa-43ae-a3ee-6d7917b05b2e@efficios.com> Date: Thu, 8 May 2025 18:59:45 +0100 X-Gm-Features: AX0GCFtHzr-BAjqfty49cDp_u6X--207kR4UI9SrLiqnNRMhB7wRGPQRb2qNUWE 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 again for replying. > Glad you caught that. I had assumed it was linked in :) Yes, I should have spotted that earlier! > 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 > ``` I now see: $ lttng enable-channel --kernel --session my_proj kernel_channel Error: Channel kernel_channel: Tracing the kernel requires a root lttng-sessiond daemon, as well as "tracing" group membership or root user ID for the lttng client (session my_proj) I am a member of the tracing group, however I need to understand how to configure the daemon. I'll have another look at the docs. Best regards David