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 the LTTng 0.5.18 tracer on a
  17 linux 2.6.15 kernel. You will also find instructions for installation of
  18 LTTV 0.8.x : the Linux Trace Toolkit Viewer.
  19
  20 The following lttng patch is necessary to have the tracing hooks in the kernel.
  21 The following ltt-control module controls the tracing.
  22
  23 Required programs and librairies are assumed to be automatically installed in an
  24 installation with Debian or RPM packages. In the case of an installation from
  25 sources, the dependencies are listed.
  26
  27
  28 ** Current development status **
  29
  30 LTTng :
  31 supported architectures :
  32 Intel Pentium (UP/SMP) with TSC
  33
  34 LTTV :
  35 supported architectures :
  36 Intel i386 and better
  37 Intel 64 bits
  38 PowerPC
  39
  40
  41
  42 Author : Mathieu Desnoyers, September 2005
  43 Last update : February 10, 2006
  44
  45
  46 ***********************************************************
  47 ** Section 1 * Installation from Debian or RPM packages  **
  48 ***********************************************************
  49
  50 ** NOTE : RPM and debian packages are only made once a version has been
  51    thoroughly tested. If they do not exist at the moment, please install from
  52          sources (see section 2 below). To see the list of compatibilities between
  53          LTTng, LTTv, genevent and lttng-modules, please refer to
  54          http://ltt.polymtl.ca > LTTng+LTTV versions compatibility
  55
  56
  57 * Install from RPM packages on Fedora Core 4 :
  58
  59 Get LTTV RPM from :
  60
  61 http://ltt.polymtl.ca/packages/fedora/RPMS
  62
  63 LTTV RPM are ready.
  64
  65 LTTng kernel and lttng-modules RPM are available for some architectures (i586,
  66 i686). Feel free to help fix the spec files to have correct lttng-modules RPM
  67 package.
  68
  69
  70 * Install from Deb packages on Debian :
  71
  72 You can use the ltt.polymtl.ca apt source to get LTTV for Debian :
  73
  74 Add the following two sources to your /etc/apt/sources.list :
  75
  76 deb http://ltt.polymtl.ca/packages/debian experimental main
  77 deb-src http://ltt.polymtl.ca/packages/debian experimental main
  78
  79
  80 * Install from precompiled binary packages (LTTV compiled only for i386, and
  81   LTTng only for i686 smp), perform the following :
  82
  83 su -
  84 apt-get update
  85 apt-get install lttv lttv-doc
  86 apt-get install kernel-image-2.6.12-rc4-mm2-lttng-0.4.2
  87 apt-get install lttng-modules-modules-2.6.12-rc4-mm2-lttng-0.4.2
  88   * note : the packages are signed by myself. I am not considered a trusted
  89     Debian source yet, so warnings are normal.
  90
  91 Then, follow the section "Editing the system wide configuration" in section 2.
  92
  93 * Create custom LTTV Debian packages
  94
  95 Binary packages are only available for i386. If you want to create your own LTTV
  96 packages for other platforms, do :
  97
  98 su -
  99 cd /usr/src
 100 apt-get source lttv
 101 cd lttv-0.6.9
 102 dpkg-buildpackage -rfakeroot
 103
 104 You should then have your LTTV .deb files created for your architecture.
 105
 106 * Create custom LTTng packages
 107
 108 For building LTTng Debian packages :
 109
 110 su -
 111 apt-get install kernel-source-2.6.12-rc4-mm2-lttng-0.4.2
 112 cd /usr/src
 113 bzip2 -cd kernel-source-2.6.12-rc4-mm2-lttng-0.4.2.tar.bz2 | tar xvof -
 114 cd kernel-source-2.6.12-rc4-mm2-lttng-0.4.2
 115 make menuconfig (or xconfig or config) (customize your configuration)
 116 make-kpkg kernel_image
 117
 118 You will then see your freshly created .deb in /usr/src. Install it with
 119 dpkg -i /usr/src/(image-name).deb
 120
 121 You will also need to create a package for the lttng-modules :
 122
 123 su -
 124 cd /usr/src
 125 apt-get source lttng-modules
 126 cd kernel-source-2.6.12-rc4-mm2-lttng-0.4.2
 127 make-kpkg --added_modules /usr/src/lttng-modules-0.3 modules_image
 128
 129 You will then see your freshly created .deb in /usr/src. Install it with
 130 dpkg -i /usr/src/lttng-modules-modules-(your version).deb
 131
 132
 133 Then, follow the section "Editing the system wide configuration" in section 2.
 134
 135
 136 ***********************************************************
 137 ** Section 2 * Installation from sources                 **
 138 ***********************************************************
 139
 140 * Prerequisites
 141
 142 Tools needed to follow the package download steps :
 143
 144 o wget
 145 o bzip2
 146 o gzip
 147 o tar
 148
 149 You have to install the standard development librairies and programs necessary
 150 to compile a kernel :
 151
 152 (from Documentation/Changes in the Linux kernel tree)
 153 o  Gnu C                  2.95.3                  # gcc --version
 154 o  Gnu make               3.79.1                  # make --version
 155 o  binutils               2.12                    # ld -v
 156 o  util-linux             2.10o                   # fdformat --version
 157 o  module-init-tools      0.9.10                  # depmod -V
 158
 159 You might also want to have libncurses5 to have the text mode kernel
 160 configuration menu, but there are alternatives.
 161
 162 Prerequisites for LTTV 0.6.x installation are :
 163
 164 gcc 3.2 or better
 165 gtk 2.4 or better development libraries
 166   (Debian : libgtk2.0, libgtk2.0-dev)
 167   (Fedora : gtk2, gtk2-devel)
 168   note : For Fedora users : this might require at least core 3 from Fedora,
 169   or you might have to compile your own GTK2 library.
 170 glib 2.4 or better development libraries
 171   (Debian : libglib2.0-0, libglib2.0-dev)
 172   (Fedora : glib2, glib2-devel)
 173 libpopt development libraries
 174   (Debian : libpopt0, libpopt-dev)
 175   (Fedora : popt)
 176 libpango development libraries
 177   (Debian : libpango1.0, libpango1.0-dev)
 178   (Fedora : pango, pango-devel)
 179 libc6 development librairies
 180   (Debian : libc6, libc6-dev)
 181   (Fedora : glibc, glibc)
 182
 183
 184 * Getting the LTTng packages
 185
 186 su -
 187 mkdir /usr/src/lttng
 188 cd /usr/src/lttng
 189 (see http://ltt.polymtl.ca/lttng for package listing)
 190 wget http://ltt.polymtl.ca/lttng/lttng-modules-0.5.tar.bz2
 191 wget http://ltt.polymtl.ca/lttng/patch-2.6.15-lttng-0.5.18.tar.bz2
 192 bzip2 -cd lttng-modules-0.5.tar.bz2 | tar xvof -
 193 bzip2 -cd patch-2.6.15-lttng-0.5.18.tar.bz2 | tar xvof -
 194
 195
 196 * Getting LTTng kernel sources
 197
 198 su -
 199 cd /usr/src
 200 wget http://kernel.org/pub/linux/kernel/v2.6/testing/linux-2.6.15.tar.bz2
 201 bzip2 -cd linux-2.6.15.tar.bz2 | tar xvof -
 202 cd linux-2.6.15
 203 cat /usr/src/lttng/patch-2.6.15-lttng-0.5.18* | patch -p1
 204 cd ..
 205 mv linux-2.6.15 linux-2.6.15-lttng-0.5.18
 206
 207
 208 * Installing a LTTng kernel
 209
 210 su -
 211 cd /usr/src/linux-2.6.15-lttng-0.5.18
 212 make menuconfig (or make xconfig or make config)
 213     Select the < Help > button if you are not familiar with kernel
 214     configuration.
 215     Items preceded by [*] means they has to be built into the kernel.
 216     Items preceded by [M] means they has to be built as modules.
 217     Items preceded by [ ] means they should be removed.
 218   go to the "Instrumentation Support" section
 219     Select the following options :
 220     [*] Linux Trace Toolkit Instrumentation Support
 221     <M> or <*> Linux Trace Toolkit Tracer
 222         It makes no difference for the rest of the procedure whether the Tracer
 223         is compiled built-in or as a module.
 224     activate :
 225        [*] Align Linux Trace Toolkit Traces
 226     do NOT activate (not ready yet) :
 227        [ ] Activate Linux Trace Toolkit Heartbeat Timer
 228                 You may or may not activate instrumentation per facility. They are all
 229                 selected for logging by default. It can be used as a compile time filter to
 230                 enable/disable logging of events. It is useful to discard events with a
 231                 minimal impact on the system and especially useful for now, as the dynamic
 232                 filter has not been implemented yet.
 233     Select <Exit>
 234   Select <Exit>
 235   Select <Yes>
 236 make
 237 make modules_install
 238 make install
 239
 240 reboot
 241
 242   Select the Linux 2.6.15-lttng-0.5.18 kernel in your boot loader.
 243
 244
 245 * Install the ltt-modules
 246
 247 su -
 248 cd /usr/src/lttng/lttng-modules-0.5
 249 KERNELDIR=/usr/src/linux-2.6.15-lttng-0.5.18 make
 250 KERNELDIR=/usr/src/linux-2.6.15-lttng-0.5.18 make modules_install
 251
 252
 253 * Editing the system wide configuration
 254
 255 You must activate relayfs and specify a mount point. This is typically done in
 256 fstab such that it happens at boot time.
 257
 258 If you have never used RelayFS before, these operation would do this for you :
 259
 260 mkdir /mnt/relayfs
 261 cp /etc/fstab /etc/fstab.lttng.bkp
 262 echo "relayfs         /mnt/relayfs    relayfs rw              0       0"  >> /etc/fstab
 263
 264 then, rebooting or issuing the following command will activate relayfs :
 265
 266 mount /mnt/relayfs
 267
 268 You need to load the ltt-control module to be able to control tracing from user
 269 space. This is done by issuing the command :
 270
 271 modprobe ltt-control
 272
 273 If you want to have complete information about the kernel state (including all
 274 the process names), you need to load the ltt-statedump module. This is done by
 275 issuing the command :
 276
 277 modprobe ltt-statedump
 278
 279 You can automate at boot time loading the ltt-control module by :
 280
 281 echo ltt-control >> /etc/modules
 282 echo ltt-statedump >> /etc/modules
 283
 284
 285 * Getting and installing the LTTV package
 286
 287 su -
 288 cd /usr/src
 289 wget http://ltt.polymtl.ca/packages/LinuxTraceToolkitViewer-0.8.13-07022006.tar.gz
 290 gzip -cd LinuxTraceToolkitViewer-0.8.13-07022006.tar.gz | tar xvof -
 291 cd LinuxTraceToolkitViewer-0.8.13-07022006
 292 (refer to README to see the development libraries that must be installed on you
 293 system)
 294 ./configure
 295 make
 296 make install
 297
 298
 299
 300
 301 ***********************************************************
 302 ** Section 3 * Using LTTng and LTTV                      **
 303 ***********************************************************
 304
 305 * Use graphical LTTV to control tracing and analyse traces
 306
 307 lttv-gui (or /usr/local/bin/lttv-gui)
 308   - Spot the "Tracing Control" icon : click on it
 309       (it's a traffic light icon)
 310     - enter the root password
 311     - click "start"
 312     - click "stop"
 313     - Yes
 314       * You should now see a trace
 315
 316 * Use text mode LTTng to control tracing
 317
 318 The tracing can be controlled from a terminal by using the lttctl command (as
 319 root).
 320
 321 Start tracing :
 322
 323 lttctl -n trace -d -l /mnt/relayfs/ltt -t /tmp/trace
 324
 325 Stop tracing and destroy trace channels :
 326
 327 lttctl -n trace -R
 328
 329 see lttctl --help for details.
 330
 331
 332 * Use text mode LTTV
 333
 334 Fell free to look in /usr/local/lib/lttv/plugins to see all the text and
 335 graphical plugins available.
 336
 337 For example, a simple trace dump in text format is available with :
 338
 339 lttv -m textDump -t /tmp/trace
 340
 341 see lttv -m textDump --help for detailed command line options of textDump.
 342
 343
 344
 345
 346 ***********************************************************
 347 ** Section 4 * Adding new instrumentations with genevent **
 348 ***********************************************************
 349
 350 * Getting and installing genevent
 351
 352 su -
 353 cd /usr/src
 354 wget http://ltt.polymtl.ca/packages/genevent-0.6.tar.gz
 355 gzip -cd genevent-0.8.tar.gz | tar xvof -
 356 cd genevent-0.8
 357 make
 358 make install
 359
 360
 361 * Add new events to the kernel with genevent
 362
 363 su -
 364 cd /usr/local/share/LinuxTraceToolkitViewer/facilities
 365 cp process.xml yourfacility.xml
 366   * edit yourfacility.xml to fit your needs.
 367 cd /tmp
 368 /usr/local/bin/genevent /usr/local/share/LinuxTraceToolkitViewer/facilities/yourfacility.xml
 369 cp ltt-facility-yourfacility.h ltt-facility-id-yourfacility.h \
 370          /usr/src/linux-2.6.15-lttng-0.5.18/include/linux/ltt
 371 cp ltt-facility-loader-yourfacility.c ltt-facility-loader-yourfacility.h \
 372          /usr/src/linux-2.6.15-lttng-0.5.18/ltt
 373   * edit the kernel file you want to instrument
 374     - Add #include <linux/ltt/ltt-facility-yourfacility.h> at the beginning
 375       of the file.
 376     - Add a call to the tracing functions. See their names and parameters in
 377       /usr/src/linux-2.6.15-lttng-0.5.18/include/linux/ltt/ltt-facility-yourfacility.h
 378
 379
 380