ltt/branches/poly/QUICKSTART

   1
   2 QUICKSTART
   3
   4 How to use LTTng and LTTV in a few lines :
   5
   6 This document is made of four parts : The first one explains how to install
   7 LTTng and LTTV from Debian and RPM binary packages, the second one explains how
   8 to install LTTng and LTTV from sources and the third one describes the steps
   9 to follow to trace a system and view it. The fourth and last part explains
  10 briefly how to add a new trace point to the kernel.
  11
  12 What you will typically want is to read sections 1 and 3 : install LTTng from
  13 binary packages and use it. If there are no packages ready for your system, you
  14 will have to install from sources (section 2) instead.
  15
  16 These operations are made for installing LTTng 0.2 on a linux 2.6.12-rc2-mm2
  17 kernel. Change the versions to fit your needs.
  18
  19 Author : Mathieu Desnoyers, September 2005
  20
  21
  22
  23 ***********************************************************
  24 ** Section 1 * Installation from Debian or RPM packages  **
  25 ***********************************************************
  26
  27 No Debian or RPM packages are ready yet.
  28
  29 TODO
  30
  31
  32 ***********************************************************
  33 ** Section 2 * Installation from sources                 **
  34 ***********************************************************
  35
  36 * Getting the LTTng packages
  37
  38 su -
  39 mkdir /usr/src/lttng
  40 cd /usr/src/lttng
  41 (see http://ltt.polymtl.ca/lttng for package listing)
  42 wget http://ltt.polymtl.ca/lttng/lttng-modules-0.2.tar.bz2
  43 wget http://ltt.polymtl.ca/lttng/patch-2.6.12-rc4-mm2-lttng-0.3.bz2
  44 bzip2 -cd lttng-modules-0.2.tar.bz2 | tar xvof -
  45
  46
  47 * Getting LTTng kernel sources
  48
  49 su -
  50 cd /usr/src
  51 wget http://kernel.org/pub/linux/kernel/v2.6/testing/linux-2.6.12-rc4.tar.bz2
  52 wget http://kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.12-rc4/2.6.12-rc4-mm2/2.6.12-rc4-mm2.bz2
  53 bzip2 -cd linux-2.6.12-rc4.tar.bz2 | tar xvof -
  54 cd linux-2.6.12-rc4
  55 bzip2 -cd ../2.6.12-rc4-mm2.bz2 | patch -p1
  56 bzip2 -cd /usr/src/lttng/patch-2.6.12-rc4-mm2-lttng-0.3.bz2 | patch -p1
  57 cd ..
  58 mv linux-2.6.12-rc4 linux-2.6.12-rc4-mm2-lttng-0.3
  59
  60
  61 * Installing a LTTng kernel
  62
  63 su -
  64 cd /usr/src/linux-2.6.12-rc4-mm2-lttng-0.3
  65 make menuconfig
  66   General setup
  67     * Linux Trace Toolkit Instrumentation Support
  68     M or * Linux Trace Toolkit Tracer
  69     do NOT activate (not ready yet) :
  70         Align Linux Trace Toolkit Traces
  71         Activate Linux Trace Toolkit Heartbeat Timer
  72               IMPORTANT : This is enabled by default : you must disable it!
  73 make
  74 make install
  75 make modules_install
  76
  77 Depending on your boot loader, you may want to execute :
  78 update-grub or lilo
  79
  80 reboot
  81
  82
  83 * Install the ltt-modules
  84
  85 su -
  86 cd /usr/src/lttng/lttng-modules-0.2
  87 KERNELDIR=/usr/src/linux-2.6.12-rc4-mm2-lttng-0.3 make
  88 KERNELDIR=/usr/src/linux-2.6.12-rc4-mm2-lttng-0.3 make modules_install
  89
  90 note : at this stage, you might want to execute
  91 modprobe ltt-control
  92
  93 and you might also want to do this :
  94 echo ltt-control >> /etc/modules
  95
  96
  97 * Getting and installing the LTTV package
  98
  99 su -
 100 cd /usr/src
 101 wget http://ltt.polymtl.ca/packages/LinuxTraceToolkitViewer-0.6.1-16092005.tar.gz
 102 gzip -cd LinuxTraceToolkitViewer-0.6.1-16092005.tar.gz | tar xvof -
 103 cd LinuxTraceToolkitViewer-0.6.1-16092005
 104 (refer to README to see the development libraries that must be installed on you
 105 system)
 106 ./configure
 107 make
 108 make install
 109
 110
 111
 112
 113 ***********************************************************
 114 ** Section 3 * Using LTTng and LTTV                      **
 115 ***********************************************************
 116
 117 * Use graphical LTTV to control tracing and analyse traces
 118
 119 lttv-gui (or /usr/local/bin/lttv-gui)
 120   - Spot the "Tracing Control" icon : click on it
 121       (it's a traffic light icon)
 122     - enter the root password
 123     - click "start"
 124     - click "stop"
 125     - Yes
 126       * You should now see a trace
 127
 128 * Use text mode LTTng to control tracing
 129
 130 The tracing can be controlled from a terminal by using the lttctl command.
 131
 132 Start tracing :
 133
 134 lttctl -n trace -d -l /mnt/relayfs/ltt -t /tmp/trace1
 135
 136 Stop tracing and destroy trace channels :
 137
 138 lttctl -n trace -R
 139
 140 see lttctl --help for details.
 141
 142
 143 * Use text mode LTTV
 144
 145 Fell free to look in /usr/local/lib/lttv/plugins to see all the text and
 146 graphical plugins available.
 147
 148 For example, a simple trace dump in text format is available with :
 149
 150 lttv -m textDump -t /tmp/trace
 151
 152 see lttv -m textDump --help for detailed command line options of textDump.
 153
 154
 155
 156
 157 ***********************************************************
 158 ** Section 4 * Adding new instrumentations with genevent **
 159 ***********************************************************
 160
 161 * Getting and installing genevent
 162
 163 su -
 164 cd /usr/src
 165 wget http://ltt.polymtl.ca/packages/genevent-0.1.tar.gz
 166 gzip -cd genevent-0.1.tar.gz | tar xvof -
 167 cd genevent-0.1
 168 make
 169 make install
 170
 171
 172 * Add new events to the kernel with genevent
 173
 174 su -
 175 cd /usr/local/share/LinuxTraceToolkitViewer/facilities
 176 cp process.xml yourfacility.xml
 177   * edit yourfacility.xml to fit your needs.
 178 cd /tmp
 179 /usr/local/bin/genevent /usr/local/share/LinuxTraceToolkitViewer/yourfacility.xml
 180 cp ltt-facility-yourfacility.h ltt-facility-id-yourfacility.h \
 181          /usr/src/linux-2.6.12-rc4-mm2-lttng-0.3/include/linux/ltt
 182 cp ltt-facility-loader-yourfacility.c ltt-facility-loader-yourfacility.h \
 183          /usr/src/linux-2.6.12-rc4-mm2-lttng-0.3/ltt
 184   * edit the kernel file you want to instrument
 185     - Add #include <linux/ltt/ltt-facility-yourfacility.h> at the beginning
 186       of the file.
 187     - Add a call to the tracing functions. See their names and parameters in
 188       /usr/src/linux-2.6.12-rc4-mm2-lttng-0.3/include/linux/ltt/ltt-facility-yourfacility.h
 189
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