Linux Trace Toolkit Quickstart
------------------------------
Author : Mathieu Desnoyers, September 2005
-Last update : July 31, 2008
+Last update : January 9th, 2009
This document is made of four parts : the first one explains how to install
What you will typically want is to read sections 2 and 3 : install LTTng from
sources and use it.
-These operations are made for installing the LTTng 0.12 tracer on a linux 2.6.X
-kernel. You will also find instructions for installation of LTTV 0.8.x : the
+These operations are made for installing the LTTng 0.74 tracer on a linux 2.6.X
+kernel. You will also find instructions for installation of LTTV 0.12.x : the
Linux Trace Toolkit Viewer.
To see the list of compatibilities between LTTng, ltt-control, LTTV and
Items preceded by [ ] means they should be removed.
go to the "General setup" section
Select the following options :
- [*] Activate tracepoints
+ [*] Prompt for development and/or incomplete code/drivers
[*] Activate markers
- [*] Activate userspace markers ABI
- <*> Compile generic tracing probes
- Linux Trace Toolkit --->
- [LTTng fine-grained-timestamping]
- [*] Linux Trace Toolkit Instrumentation Support
- <M> or <*> Linux Trace Toolkit Relay+DebugFS Support
+ [*] Activate userspace markers ABI (experimental, optional)
+ [*] Immediate value optimization (optional)
+ [*] Linux Trace Toolkit Next Generation (LTTng) --->
+ <M> or <*> Compile lttng tracing probes
+ <M> or <*> Linux Trace Toolkit High-speed Lockless Data Relay
+ <M> or <*> Linux Trace Toolkit Lock-Protected Data Relay
<M> or <*> Linux Trace Toolkit Serializer
- <M> or <*> Linux Trace Toolkit Marker Control
- <M> or <*> Linux Trace Toolkit Tracer
- It makes no difference for the rest of the procedure whether the Tracer
- is compiled built-in or as a module.
- activate :
- [*] Align Linux Trace Toolkit Traces
- <M> Linux Trace Toolkit Netlink Controller
- <M> Linux Trace Toolkit State Dump
- your choice (see < Help >) :
- [ ] Write heartbeat event to shrink traces
- [ ] Support trace extraction from crash dump
+ <M> or <*> Linux Trace Toolkit Marker Control
+ <M> or <*> Linux Trace Toolkit Tracer
+ [*] Align Linux Trace Toolkit Traces
+ <M> or <*> Support logging events from userspace
+ [*] Support trace extraction from crash dump
+ <M> or <*> Linux Trace Toolkit Trace Controller
+ <M> or <*> Linux Trace Toolkit State Dump
Select <Exit>
Select <Exit>
Select <Yes>
-- on X86, X86_64
make install
reboot
-Select the Linux 2.6.17-lttng-0.x.xx kernel in your boot loader.
+Select the Linux 2.6.X-lttng-0.x.xx kernel in your boot loader.
-- on PowerPC
cp vmlinux.strip /boot/vmlinux-2.6.X-lttng-0.x.xx
ybin
select the right entry at the yaboot prompt (see choices : tab, select : type
the kernel name followed by enter)
-Select the Linux 2.6.17-lttng-0.x.xx kernel in your boot loader.
+Select the Linux 2.6.X-lttng-0.x.xx kernel in your boot loader.
--
modprobe mm-trace
modprobe net-trace
modprobe fs-trace
+modprobe jbd2-trace
+modprobe ext4-trace
modprobe syscall-trace
modprobe trap-trace
#if locking tracing is wanted, uncomment the following
echo mm-trace >> /etc/modules
echo net-trace >> /etc/modules
echo fs-trace >> /etc/modules
+echo jbd2-trace >> /etc/modules
+echo ext4-trace >> /etc/modules
+echo syscall-trace >> /etc/modules
+echo trap-trace >> /etc/modules
#if locking tracing is wanted, uncomment the following
#echo lockdep-trace >> /etc/modules
su -
cd /usr/src
wget http://ltt.polymtl.ca/lttng/ltt-control-0.x-xxxx2006.tar.gz
-gzip -cd ltt-control-0.x-xxxx2006.tar.gz | tar xvof -
+gzip -cd ltt-control-0.x-xxxx2008.tar.gz | tar xvof -
cd ltt-control-0.x-xxxx2006
(refer to README to see the development libraries that must be installed on you
system)
make
make install
-* Getting and installing the markers-userspace package for user space tracing
-See http://ltt.polymtl.ca/packages/markers-userspace-0.5.tar.bz2 or more recent.
+
+* Userspace tracing
+
+Make sure you selected the kernel menuconfig option :
+ <M> or <*> Support logging events from userspace
+And that the ltt-userspace-event kernel module is loaded if selected as a
+module.
+
+Simple userspace tracing is available through
+echo "some text to record" > /mnt/debugfs/ltt/write_event
+
+It will appear in the trace under event :
+channel : userspace
+event name : event
* Getting and installing the LTTV package (on the visualisation machine, same or
make install
+* Getting and installing the markers-userspace package for user space tracing
+(experimental)
+See http://ltt.polymtl.ca/packages/markers-userspace-0.5.tar.bz2 or more recent.
+
***********************************************************
projects / lttv.git / blobdiff