Intel Pentium (UP/SMP) with TSC
PowerPC 32 and 64 bits
ARM
+x86_64
C2 Microsystems (variant of MIPS)
LTTV :
* Editing the system wide configuration
-You must activate relayfs and specify a mount point. This is typically done in
+You must activate debugfs and specify a mount point. This is typically done in
fstab such that it happens at boot time.
-If you have never used RelayFS before, these operation would do this for you :
+If you have never used DebugFS before, these operation would do this for you :
-mkdir /mnt/relayfs
+mkdir /mnt/debugfs
cp /etc/fstab /etc/fstab.lttng.bkp
-echo "relayfs /mnt/relayfs relayfs rw 0 0" >> /etc/fstab
+echo "debugfs /mnt/debugfs debugfs rw 0 0" >> /etc/fstab
-then, rebooting or issuing the following command will activate relayfs :
+then, rebooting or issuing the following command will activate debugfs :
-mount /mnt/relayfs
+mount /mnt/debugfs
You need to load the ltt-control module to be able to control tracing from user
space. This is done by issuing the command :
modprobe ltt-control
+modprobe ltt-core
+modprobe ltt-relay
If you want to have complete information about the kernel state (including all
the process names), you need to load the ltt-statedump module. This is done by
You can automate at boot time loading the ltt-control module by :
echo ltt-control >> /etc/modules
+echo ltt-core >> /etc/modules
+echo ltt-relay >> /etc/modules
echo ltt-statedump >> /etc/modules
Start tracing :
-lttctl -n trace -d -l /mnt/relayfs/ltt -t /tmp/trace
+lttctl -n trace -d -l /mnt/debugfs/ltt -t /tmp/trace
Stop tracing and destroy trace channels :