From: Mathieu Desnoyers via lttng-dev <lttng-dev@lists.lttng.org> To: Yonghong Yan <yanyh15@gmail.com> Cc: lttng-dev <lttng-dev@lists.lttng.org> Subject: Re: process/thread-specific UST tracing Date: Fri, 15 May 2020 15:15:16 -0400 (EDT) [thread overview] Message-ID: <996953575.22598.1589570116107.JavaMail.zimbra@efficios.com> (raw) In-Reply-To: <CACJEY85H4OMTz9ggfZZP3QCXoWgLiJgsMVNTP8LNBAF67mQTEQ@mail.gmail.com> [-- Attachment #1.1: Type: text/plain, Size: 1365 bytes --] ----- On May 15, 2020, at 1:16 PM, lttng-dev <lttng-dev@lists.lttng.org> wrote: > I am tracing a multiprocess/multithreaded code (MPI/OpenMP) using lttng-ust. > Right now, I need to include process id and thread id for each event in order > to generate process/thread indexed view of the traces. Is there a way that I > can store per-process events into a specific buffer without mixing the events > with other events that are generated on the same CPU? The same thing for > per-thread events, I would like lttng or CTF to allow to store per-thread > events in a specific buffer without mixing the events with other events on the > same CPU channel. With that feature, I do not need to store process id and > thread id in each event and then need to query all the events in order to > collect per-process or per-thread event. No, but you can use kernel tracing (lttng-modules) of the scheduler events (sched:*) to map the CPU number to the currently running thread and process at trace post-processing. By doing so, both current thread and process become implicit with the CPU number. Thanks, Mathieu > Thank you > Yonghong > _______________________________________________ > lttng-dev mailing list > lttng-dev@lists.lttng.org > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com [-- Attachment #1.2: Type: text/html, Size: 2529 bytes --] [-- Attachment #2: Type: text/plain, Size: 156 bytes --] _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
WARNING: multiple messages have this Message-ID (diff)
From: Mathieu Desnoyers via lttng-dev <lttng-dev@lists.lttng.org> To: Yonghong Yan <yanyh15@gmail.com> Cc: lttng-dev <lttng-dev@lists.lttng.org> Subject: Re: [lttng-dev] process/thread-specific UST tracing Date: Fri, 15 May 2020 15:15:16 -0400 (EDT) [thread overview] Message-ID: <996953575.22598.1589570116107.JavaMail.zimbra@efficios.com> (raw) Message-ID: <20200515191516.selS2gtKR3oYafoA9oHxcoqe8nz1Uk1Gs4nngSU1GGc@z> (raw) In-Reply-To: <CACJEY85H4OMTz9ggfZZP3QCXoWgLiJgsMVNTP8LNBAF67mQTEQ@mail.gmail.com> [-- Attachment #1.1: Type: text/plain, Size: 1365 bytes --] ----- On May 15, 2020, at 1:16 PM, lttng-dev <lttng-dev@lists.lttng.org> wrote: > I am tracing a multiprocess/multithreaded code (MPI/OpenMP) using lttng-ust. > Right now, I need to include process id and thread id for each event in order > to generate process/thread indexed view of the traces. Is there a way that I > can store per-process events into a specific buffer without mixing the events > with other events that are generated on the same CPU? The same thing for > per-thread events, I would like lttng or CTF to allow to store per-thread > events in a specific buffer without mixing the events with other events on the > same CPU channel. With that feature, I do not need to store process id and > thread id in each event and then need to query all the events in order to > collect per-process or per-thread event. No, but you can use kernel tracing (lttng-modules) of the scheduler events (sched:*) to map the CPU number to the currently running thread and process at trace post-processing. By doing so, both current thread and process become implicit with the CPU number. Thanks, Mathieu > Thank you > Yonghong > _______________________________________________ > lttng-dev mailing list > lttng-dev@lists.lttng.org > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com [-- Attachment #1.2: Type: text/html, Size: 2529 bytes --] [-- Attachment #2: Type: text/plain, Size: 156 bytes --] _______________________________________________ lttng-dev mailing list lttng-dev@lists.lttng.org https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
next prev parent reply other threads:[~2020-05-15 19:21 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-05-15 17:16 process/thread-specific UST tracing Yonghong Yan via lttng-dev 2020-05-15 17:16 ` [lttng-dev] " Yonghong Yan via lttng-dev 2020-05-15 19:15 ` Mathieu Desnoyers via lttng-dev [this message] 2020-05-15 19:15 ` Mathieu Desnoyers via lttng-dev
Reply instructions: You may reply publicly to this message via plain-text email using any one of the following methods: * Save the following mbox file, import it into your mail client, and reply-to-all from there: mbox Avoid top-posting and favor interleaved quoting: https://en.wikipedia.org/wiki/Posting_style#Interleaved_style * Reply using the --to, --cc, and --in-reply-to switches of git-send-email(1): git send-email \ --in-reply-to=996953575.22598.1589570116107.JavaMail.zimbra@efficios.com \ --to=lttng-dev@lists.lttng.org \ --cc=mathieu.desnoyers@efficios.com \ --cc=yanyh15@gmail.com \ /path/to/YOUR_REPLY https://kernel.org/pub/software/scm/git/docs/git-send-email.html * If your mail client supports setting the In-Reply-To header via mailto: links, try the mailto: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions for how to clone and mirror all data and code used for this inbox; as well as URLs for NNTP newsgroup(s).