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Message-ID: <tip-a76f8c6da1e48fd4ef025f42c736389532ff30ba@git.kernel.org> Date: Fri, 1 May 2009 13:28:35 GMT From: tip-bot for Jason Baron <jbaron@...hat.com> To: linux-tip-commits@...r.kernel.org Cc: linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...hat.com, jbaron@...hat.com, tglx@...utronix.de, randy.dunlap@...cle.com, mingo@...e.hu Subject: [tip:tracing/core] tracing: add new tracepoints docbook Commit-ID: a76f8c6da1e48fd4ef025f42c736389532ff30ba Gitweb: http://git.kernel.org/tip/a76f8c6da1e48fd4ef025f42c736389532ff30ba Author: Jason Baron <jbaron@...hat.com> AuthorDate: Thu, 30 Apr 2009 13:29:42 -0400 Committer: Ingo Molnar <mingo@...e.hu> CommitDate: Fri, 1 May 2009 14:03:35 +0200 tracing: add new tracepoints docbook Add tracepoint docbook. This will help us document and understand what tracepoints are in the kernel. Since there are multiple macros, and files that contain tracepoints. [ Impact: add documentation ] Signed-off-by: Jason Baron <jbaron@...hat.com> Acked-by: Randy Dunlap <randy.dunlap@...cle.com> Cc: akpm@...ux-foundation.org Cc: rostedt@...dmis.org Cc: fweisbec@...il.com Cc: mathieu.desnoyers@...ymtl.ca Cc: wcohen@...hat.com LKML-Reference: <84160b6bd94aff02455da7e12bad054d34c579a0.1241107197.git.jbaron@...hat.com> Signed-off-by: Ingo Molnar <mingo@...e.hu> --- Documentation/DocBook/Makefile | 3 +- Documentation/DocBook/tracepoint.tmpl | 84 +++++++++++++++++++++++++++++++++ 2 files changed, 86 insertions(+), 1 deletions(-) diff --git a/Documentation/DocBook/Makefile b/Documentation/DocBook/Makefile index 8918a32..4c8f4d6 100644 --- a/Documentation/DocBook/Makefile +++ b/Documentation/DocBook/Makefile @@ -13,7 +13,8 @@ DOCBOOKS := z8530book.xml mcabook.xml device-drivers.xml \ gadget.xml libata.xml mtdnand.xml librs.xml rapidio.xml \ genericirq.xml s390-drivers.xml uio-howto.xml scsi.xml \ mac80211.xml debugobjects.xml sh.xml regulator.xml \ - alsa-driver-api.xml writing-an-alsa-driver.xml + alsa-driver-api.xml writing-an-alsa-driver.xml \ + tracepoint.xml ### # The build process is as follows (targets): diff --git a/Documentation/DocBook/tracepoint.tmpl b/Documentation/DocBook/tracepoint.tmpl new file mode 100644 index 0000000..70891bc --- /dev/null +++ b/Documentation/DocBook/tracepoint.tmpl @@ -0,0 +1,84 @@ +<?xml version="1.0" encoding="UTF-8"?> +<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.1.2//EN" + "http://www.oasis-open.org/docbook/xml/4.1.2/docbookx.dtd" []> + +<book id="Tracepoints"> + <bookinfo> + <title>The Linux Kernel Tracepoint API</title> + + <authorgroup> + <author> + <firstname>Jason</firstname> + <surname>Baron</surname> + <affiliation> + <address> + <email>jbaron@...hat.com</email> + </address> + </affiliation> + </author> + </authorgroup> + + <legalnotice> + <para> + This documentation is free software; you can redistribute + it and/or modify it under the terms of the GNU General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later + version. + </para> + + <para> + This program is distributed in the hope that it will be + useful, but WITHOUT ANY WARRANTY; without even the implied + warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + See the GNU General Public License for more details. + </para> + + <para> + You should have received a copy of the GNU General Public + License along with this program; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, + MA 02111-1307 USA + </para> + + <para> + For more details see the file COPYING in the source + distribution of Linux. + </para> + </legalnotice> + </bookinfo> + + <toc></toc> + <chapter id="intro"> + <title>Introduction</title> + <para> + Tracepoints are static probe points that are located in strategic points + throughout the kernel. 'Probes' register/unregister with tracepoints + via a callback mechanism. The 'probes' are strictly typed functions that + are passed a unique set of parameters defined by each tracepoint. + </para> + + <para> + From this simple callback mechanism, 'probes' can be used to profile, debug, + and understand kernel behavior. There are a number of tools that provide a + framework for using 'probes'. These tools include Systemtap, ftrace, and + LTTng. + </para> + + <para> + Tracepoints are defined in a number of header files via various macros. Thus, + the purpose of this document is to provide a clear accounting of the available + tracepoints. The intention is to understand not only what tracepoints are + available but also to understand where future tracepoints might be added. + </para> + + <para> + The API presented has functions of the form: + <function>trace_tracepointname(function parameters)</function>. These are the + tracepoints callbacks that are found throughout the code. Registering and + unregistering probes with these callback sites is covered in the + <filename>Documentation/trace/*</filename> directory. + </para> + </chapter> + +</book> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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