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1 | |
2 | QUICKSTART |
3 | |
4 | How to use LTTng and LTTV in a few lines : |
5 | |
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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 | |
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16 | These operations are made for installing the LTTng 0.5.X tracer on a |
17 | linux 2.6.X kernel. You will also find instructions for installation of |
18 | LTTV 0.8.x : the Linux Trace Toolkit Viewer. |
19 | |
20 | To see the list of compatibilities between LTTng, ltt-control, LTTV, genevent |
21 | and lttng-modules, please refer to : |
22 | http://ltt.polymtl.ca > LTTng+LTTV versions compatibility |
23 | |
24 | |
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25 | |
26 | The following lttng patch is necessary to have the tracing hooks in the kernel. |
27 | The following ltt-control module controls the tracing. |
28 | |
29 | Required programs and librairies are assumed to be automatically installed in an |
30 | installation with Debian or RPM packages. In the case of an installation from |
31 | sources, the dependencies are listed. |
32 | |
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33 | |
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34 | ** Current development status ** |
35 | |
36 | LTTng : |
37 | supported architectures : |
38 | Intel Pentium (UP/SMP) with TSC |
39 | |
40 | LTTV : |
41 | supported architectures : |
42 | Intel i386 and better |
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43 | Intel 64 bits |
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44 | PowerPC |
45 | |
46 | |
47 | |
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48 | Author : Mathieu Desnoyers, September 2005 |
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49 | Last update : February 10, 2006 |
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50 | |
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51 | |
52 | *********************************************************** |
53 | ** Section 1 * Installation from Debian or RPM packages ** |
54 | *********************************************************** |
55 | |
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56 | ** NOTE : RPM and debian packages are only made once a version has been |
57 | thoroughly tested. If they do not exist at the moment, please install from |
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58 | sources (see section 2 below). To see the list of compatibilities between |
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59 | LTTng, ltt-control, LTTV, genevent and lttng-modules, please refer to |
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60 | http://ltt.polymtl.ca > LTTng+LTTV versions compatibility |
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61 | |
62 | |
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63 | * Install from RPM packages on Fedora Core 4 : |
64 | |
65 | Get LTTV RPM from : |
66 | |
67 | http://ltt.polymtl.ca/packages/fedora/RPMS |
68 | |
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69 | LTTV RPM are ready. |
70 | |
71 | LTTng kernel and lttng-modules RPM are available for some architectures (i586, |
72 | i686). Feel free to help fix the spec files to have correct lttng-modules RPM |
73 | package. |
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74 | |
75 | |
76 | * Install from Deb packages on Debian : |
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77 | |
78 | You can use the ltt.polymtl.ca apt source to get LTTV for Debian : |
79 | |
80 | Add the following two sources to your /etc/apt/sources.list : |
81 | |
82 | deb http://ltt.polymtl.ca/packages/debian experimental main |
83 | deb-src http://ltt.polymtl.ca/packages/debian experimental main |
84 | |
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85 | |
86 | * Install from precompiled binary packages (LTTV compiled only for i386, and |
87 | LTTng only for i686 smp), perform the following : |
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88 | |
89 | su - |
90 | apt-get update |
91 | apt-get install lttv lttv-doc |
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92 | apt-get install kernel-image-2.6.12-rc4-mm2-lttng-0.4.2 |
93 | apt-get install lttng-modules-modules-2.6.12-rc4-mm2-lttng-0.4.2 |
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94 | * note : the packages are signed by myself. I am not considered a trusted |
95 | Debian source yet, so warnings are normal. |
96 | |
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97 | Then, follow the section "Editing the system wide configuration" in section 2. |
98 | |
99 | * Create custom LTTV Debian packages |
100 | |
101 | Binary packages are only available for i386. If you want to create your own LTTV |
102 | packages for other platforms, do : |
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103 | |
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104 | su - |
105 | cd /usr/src |
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106 | apt-get source lttv |
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107 | cd lttv-0.6.9 |
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108 | dpkg-buildpackage -rfakeroot |
109 | |
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110 | You should then have your LTTV .deb files created for your architecture. |
111 | |
112 | * Create custom LTTng packages |
113 | |
114 | For building LTTng Debian packages : |
115 | |
116 | su - |
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117 | apt-get install kernel-source-2.6.12-rc4-mm2-lttng-0.4.2 |
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118 | cd /usr/src |
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119 | bzip2 -cd kernel-source-2.6.12-rc4-mm2-lttng-0.4.2.tar.bz2 | tar xvof - |
120 | cd kernel-source-2.6.12-rc4-mm2-lttng-0.4.2 |
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121 | make menuconfig (or xconfig or config) (customize your configuration) |
122 | make-kpkg kernel_image |
123 | |
124 | You will then see your freshly created .deb in /usr/src. Install it with |
125 | dpkg -i /usr/src/(image-name).deb |
126 | |
127 | You will also need to create a package for the lttng-modules : |
128 | |
129 | su - |
130 | cd /usr/src |
131 | apt-get source lttng-modules |
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132 | cd kernel-source-2.6.12-rc4-mm2-lttng-0.4.2 |
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133 | make-kpkg --added_modules /usr/src/lttng-modules-0.3 modules_image |
134 | |
135 | You will then see your freshly created .deb in /usr/src. Install it with |
136 | dpkg -i /usr/src/lttng-modules-modules-(your version).deb |
137 | |
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138 | |
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139 | Then, follow the section "Editing the system wide configuration" in section 2. |
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140 | |
141 | |
142 | *********************************************************** |
143 | ** Section 2 * Installation from sources ** |
144 | *********************************************************** |
145 | |
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146 | * Prerequisites |
147 | |
148 | Tools needed to follow the package download steps : |
149 | |
150 | o wget |
151 | o bzip2 |
152 | o gzip |
153 | o tar |
154 | |
155 | You have to install the standard development librairies and programs necessary |
156 | to compile a kernel : |
157 | |
158 | (from Documentation/Changes in the Linux kernel tree) |
159 | o Gnu C 2.95.3 # gcc --version |
160 | o Gnu make 3.79.1 # make --version |
161 | o binutils 2.12 # ld -v |
162 | o util-linux 2.10o # fdformat --version |
163 | o module-init-tools 0.9.10 # depmod -V |
164 | |
165 | You might also want to have libncurses5 to have the text mode kernel |
166 | configuration menu, but there are alternatives. |
167 | |
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168 | Prerequisites for LTTV 0.x.x installation are : |
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169 | |
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170 | gcc 3.2 or better |
171 | gtk 2.4 or better development libraries |
172 | (Debian : libgtk2.0, libgtk2.0-dev) |
173 | (Fedora : gtk2, gtk2-devel) |
174 | note : For Fedora users : this might require at least core 3 from Fedora, |
175 | or you might have to compile your own GTK2 library. |
176 | glib 2.4 or better development libraries |
177 | (Debian : libglib2.0-0, libglib2.0-dev) |
178 | (Fedora : glib2, glib2-devel) |
179 | libpopt development libraries |
180 | (Debian : libpopt0, libpopt-dev) |
181 | (Fedora : popt) |
182 | libpango development libraries |
183 | (Debian : libpango1.0, libpango1.0-dev) |
184 | (Fedora : pango, pango-devel) |
185 | libc6 development librairies |
186 | (Debian : libc6, libc6-dev) |
187 | (Fedora : glibc, glibc) |
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188 | |
189 | |
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190 | * Getting the LTTng packages |
191 | |
192 | su - |
193 | mkdir /usr/src/lttng |
194 | cd /usr/src/lttng |
195 | (see http://ltt.polymtl.ca/lttng for package listing) |
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196 | wget http://ltt.polymtl.ca/lttng/lttng-modules-0.5.tar.bz2 |
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197 | wget http://ltt.polymtl.ca/lttng/patch-2.6.15-lttng-0.x.xx.tar.bz2 |
198 | bzip2 -cd lttng-modules-0.x.tar.bz2 | tar xvof - |
199 | bzip2 -cd patch-2.6.15-lttng-0.x.xx.tar.bz2 | tar xvof - |
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200 | |
201 | |
202 | * Getting LTTng kernel sources |
203 | |
204 | su - |
205 | cd /usr/src |
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206 | wget http://kernel.org/pub/linux/kernel/v2.6/testing/linux-2.6.15.tar.bz2 |
207 | bzip2 -cd linux-2.6.15.tar.bz2 | tar xvof - |
208 | cd linux-2.6.15 |
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209 | cat /usr/src/lttng/patch-2.6.15-lttng-0.x.xx* | patch -p1 |
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210 | cd .. |
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211 | mv linux-2.6.15 linux-2.6.15-lttng-0.x.xx |
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212 | |
213 | |
214 | * Installing a LTTng kernel |
215 | |
216 | su - |
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217 | cd /usr/src/linux-2.6.15-lttng-0.x.xx |
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218 | make menuconfig (or make xconfig or make config) |
219 | Select the < Help > button if you are not familiar with kernel |
220 | configuration. |
221 | Items preceded by [*] means they has to be built into the kernel. |
222 | Items preceded by [M] means they has to be built as modules. |
223 | Items preceded by [ ] means they should be removed. |
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224 | go to the "Instrumentation Support" section |
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225 | Select the following options : |
226 | [*] Linux Trace Toolkit Instrumentation Support |
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227 | <M> or <*> Linux Trace Toolkit Tracer |
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228 | It makes no difference for the rest of the procedure whether the Tracer |
229 | is compiled built-in or as a module. |
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230 | activate : |
231 | [*] Align Linux Trace Toolkit Traces |
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232 | [*] Allow tracing from userspace |
233 | your choice (see < Help >) : |
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234 | [ ] Activate Linux Trace Toolkit Heartbeat Timer |
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235 | You may or may not activate instrumentation per facility. They are all |
236 | selected for logging by default. It can be used as a compile time filter to |
237 | enable/disable logging of events. It is useful to discard events with a |
238 | minimal impact on the system and especially useful for now, as the dynamic |
239 | filter has not been implemented yet. |
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240 | Select <Exit> |
241 | Select <Exit> |
242 | Select <Yes> |
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243 | make |
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244 | make modules_install |
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245 | make install |
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246 | |
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247 | reboot |
248 | |
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249 | Select the Linux 2.6.15-lttng-0.x.xx kernel in your boot loader. |
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250 | |
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251 | |
252 | * Install the ltt-modules |
253 | |
254 | su - |
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255 | cd /usr/src/lttng/lttng-modules-0.xx |
256 | KERNELDIR=/usr/src/linux-2.6.15-lttng-0.x.xx make |
257 | KERNELDIR=/usr/src/linux-2.6.15-lttng-0.x.xx make modules_install |
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258 | |
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259 | |
260 | * Editing the system wide configuration |
261 | |
262 | You must activate relayfs and specify a mount point. This is typically done in |
263 | fstab such that it happens at boot time. |
264 | |
265 | If you have never used RelayFS before, these operation would do this for you : |
266 | |
267 | mkdir /mnt/relayfs |
268 | cp /etc/fstab /etc/fstab.lttng.bkp |
269 | echo "relayfs /mnt/relayfs relayfs rw 0 0" >> /etc/fstab |
270 | |
271 | then, rebooting or issuing the following command will activate relayfs : |
272 | |
273 | mount /mnt/relayfs |
274 | |
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275 | You need to load the ltt-control module to be able to control tracing from user |
276 | space. This is done by issuing the command : |
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277 | |
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278 | modprobe ltt-control |
279 | |
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280 | If you want to have complete information about the kernel state (including all |
281 | the process names), you need to load the ltt-statedump module. This is done by |
282 | issuing the command : |
283 | |
284 | modprobe ltt-statedump |
285 | |
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286 | You can automate at boot time loading the ltt-control module by : |
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287 | |
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288 | echo ltt-control >> /etc/modules |
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289 | echo ltt-statedump >> /etc/modules |
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290 | |
291 | |
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292 | * Getting and installing the ltt-control package (on the traced machine) |
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293 | |
294 | su - |
295 | cd /usr/src |
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296 | wget http://ltt.polymtl.ca/lttng/ltt-control-0.x-xxxx2006.tar.gz |
297 | gzip -cd ltt-control-0.x-xxxx2006.tar.gz | tar xvof - |
298 | cd ltt-control-0.x-xxxx2006 |
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299 | (refer to README to see the development libraries that must be installed on you |
300 | system) |
301 | ./configure |
302 | make |
303 | make install |
304 | |
305 | |
306 | * Getting and installing the LTTV package (on the visualisation machine, same or |
307 | different from the visualisation machine) |
308 | |
309 | su - |
310 | cd /usr/src |
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311 | wget http://ltt.polymtl.ca/packages/LinuxTraceToolkitViewer-0.x.xx-xxxx2006.tar.gz |
312 | gzip -cd LinuxTraceToolkitViewer-0.x.xx-xxxx2006.tar.gz | tar xvof - |
313 | cd LinuxTraceToolkitViewer-0.x.xx-xxxx2006 |
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314 | (refer to README to see the development libraries that must be installed on you |
315 | system) |
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316 | ./configure |
317 | make |
318 | make install |
319 | |
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320 | |
321 | |
322 | |
323 | *********************************************************** |
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324 | ** Section 3 * Using LTTng and LTTV ** |
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325 | *********************************************************** |
326 | |
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327 | * Use graphical LTTV to control tracing and analyse traces |
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328 | |
329 | lttv-gui (or /usr/local/bin/lttv-gui) |
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330 | - Spot the "Tracing Control" icon : click on it |
331 | (it's a traffic light icon) |
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332 | - enter the root password |
333 | - click "start" |
334 | - click "stop" |
335 | - Yes |
336 | * You should now see a trace |
337 | |
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338 | * Use text mode LTTng to control tracing |
339 | |
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340 | The tracing can be controlled from a terminal by using the lttctl command (as |
341 | root). |
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342 | |
343 | Start tracing : |
344 | |
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345 | lttctl -n trace -d -l /mnt/relayfs/ltt -t /tmp/trace |
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346 | |
347 | Stop tracing and destroy trace channels : |
348 | |
349 | lttctl -n trace -R |
350 | |
351 | see lttctl --help for details. |
352 | |
353 | |
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354 | * Use text mode LTTV |
355 | |
356 | Fell free to look in /usr/local/lib/lttv/plugins to see all the text and |
357 | graphical plugins available. |
358 | |
359 | For example, a simple trace dump in text format is available with : |
360 | |
361 | lttv -m textDump -t /tmp/trace |
362 | |
363 | see lttv -m textDump --help for detailed command line options of textDump. |
364 | |
365 | |
366 | |
367 | |
368 | *********************************************************** |
369 | ** Section 4 * Adding new instrumentations with genevent ** |
370 | *********************************************************** |
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371 | |
372 | * Getting and installing genevent |
373 | |
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374 | su - |
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375 | cd /usr/src |
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376 | wget http://ltt.polymtl.ca/packages/genevent-0.xx.tar.gz |
377 | gzip -cd genevent-0.xx.tar.gz | tar xvof - |
378 | cd genevent-0.xx |
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379 | make |
380 | make install |
381 | |
382 | |
383 | * Add new events to the kernel with genevent |
384 | |
385 | su - |
386 | cd /usr/local/share/LinuxTraceToolkitViewer/facilities |
387 | cp process.xml yourfacility.xml |
388 | * edit yourfacility.xml to fit your needs. |
389 | cd /tmp |
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390 | /usr/local/bin/genevent /usr/local/share/LinuxTraceToolkitViewer/facilities/yourfacility.xml |
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391 | cp ltt-facility-yourfacility.h ltt-facility-id-yourfacility.h \ |
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392 | /usr/src/linux-2.6.15-lttng-0.x.xx8/include/linux/ltt |
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393 | cp ltt-facility-loader-yourfacility.c ltt-facility-loader-yourfacility.h \ |
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394 | /usr/src/linux-2.6.15-lttng-0.x.xx/ltt |
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395 | * edit the kernel file you want to instrument |
396 | - Add #include <linux/ltt/ltt-facility-yourfacility.h> at the beginning |
397 | of the file. |
398 | - Add a call to the tracing functions. See their names and parameters in |
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399 | /usr/src/linux-2.6.15-lttng-0.x.xx/include/linux/ltt/ltt-facility-yourfacility.h |
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400 | |
401 | |
402 | |