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From: Lukas Bulwahn <lukas.bulwahn@gmail.com>
To: Steven Rostedt <rostedt@goodmis.org>
Cc: linux-trace-devel@vger.kernel.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Tom Zanussi <zanussi@kernel.org>,
	Daniel Bristot de Oliveira <bristot@redhat.com>,
	Masami Hiramatsu <mhiramat@kernel.org>,
	Namhyung Kim <namhyung@kernel.org>,
	linux-rt-users <linux-rt-users@vger.kernel.org>,
	Clark Williams <williams@redhat.com>,
	Daniel Black <daniel@linux.ibm.com>
Subject: Re: [PATCH v2 01/21] libtracefs: Added new API tracefs_sql()
Date: Tue, 3 Aug 2021 09:27:42 +0200	[thread overview]
Message-ID: <CAKXUXMzMW5NeCjxXDQEmC-imrbg3AGR4sg+TOwnj0eFRyLSb4g@mail.gmail.com> (raw)
In-Reply-To: <20210803042347.679499-2-rostedt@goodmis.org>

On Tue, Aug 3, 2021 at 6:23 AM Steven Rostedt <rostedt@goodmis.org> wrote:
>
> From: "Steven Rostedt (VMware)" <rostedt@goodmis.org>
>
> This adds the API tracefs_sql() that takes a tep_handle handler, a name,
> and a SQL string and parses it to produce a tracefs_synth synthetic event
> handler.
>
> Currently it only supports simple SQL of the type:
>
>   SELECT start.common_pid AS pid, end.common_timestamp.usecs AS usecs
>     FROM sched_waking AS start JOIN sched_switch AS end
>     ON start.pid = end.next_pid
>
> Special thanks to:
>
>   Lukas Bulwahn for first introducing the idea at RT Summit on the Summit
>     Spring of 2019.

Thanks, Steven, for putting this idea to life.

I hope that the tracing users appreciate this new declarative
interface using SQL and it makes tracing events easier comprehensible
to a larger community of users.

Lukas

  reply	other threads:[~2021-08-03  7:27 UTC|newest]

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-03  4:23 [PATCH v2 00/21] libtracefs: Introducing tracefs_sql() to create synthetice events with an SQL line Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 01/21] libtracefs: Added new API tracefs_sql() Steven Rostedt
2021-08-03  7:27   ` Lukas Bulwahn [this message]
2021-08-03  4:23 ` [PATCH v2 02/21] tracefs: Add unit tests for tracefs_sql() Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 03/21] libtracefs: Add comparing start and end fields in tracefs_sql() Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 04/21] libtracefs: Add unit test to test tracefs_sql() compare Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 05/21] libtracefs: Add filtering for start and end events in tracefs_sql() Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 06/21] libtracefs: Add unit test to test tracefs_sql() where clause Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 07/21] libtracefs: Make sqlhist parser reentrant Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 08/21] libtracefs: Make parser unique to libtracefs Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 09/21] libtracefs: Add line number and index to expr structure Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 10/21] libtracefs: Add error message when match fields are not FROM and JOIN events Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 11/21] libtracefs: Add error message when match or init fails from bad events Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 12/21] libtracefs; Add error message for bad selections to SQL sequence Steven Rostedt
2021-08-03 12:40   ` Daniel Bristot de Oliveira
2021-08-03  4:23 ` [PATCH v2 13/21] libtracefs: Add error message when compare fields fail Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 14/21] libtracefs: Add error message for grouping events in SQL filter Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 15/21] libtracefs: Add error message for bad filters in SQL statement Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 16/21] libtracefs: Add error message when calculation has no label Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 17/21] libtracefs: Add man page for tracefs_sql() Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 18/21] libtracefs: Allow for simple SQL statements to create a histogram Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 19/21] libtracefs: Allow trace_sql() to take keywords for fields with backslash Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 20/21] libtracefs: Add CAST() syntax to SQL parsing for histogram types Steven Rostedt
2021-08-03  4:23 ` [PATCH v2 21/21] libtracefs: Add CAST(x AS _COUNTER_) syntax to create values in histograms Steven Rostedt
2021-08-04 11:57 ` [PATCH v2 00/21] libtracefs: Introducing tracefs_sql() to create synthetice events with an SQL line Ahmed S. Darwish
2021-08-04 13:23   ` Steven Rostedt

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