ltt usage issue:

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi all

I am new to lttng/ltt. I am having problems using lttng with LTT viewer.
since there is no lttng-user forum, I am posting it here. I apologize
for the same. Someone please respond. The version details of lttng,
lttv, ltt-usertrace, os etc are given below:

problem:
===========
I am simply unable to use ltt-usertrace. I tried to follow steps listed
in Quickstart guide. But I am getting nowhere. I am unable to produce trace

** ERROR **: Trace /tmp/trace has no facility tracefile
aborting...
/usr/local/bin/lttv: line 15: 26289 Aborted                 $0.real $*


Steps followed:
================
1. started the trace as follows:
[pradeep@fd0005 ltt-usertrace-0.32]$ sudo lttctl -n trace -d -l
/mnt/debugfs/ltt -t /tmp/trace
Linux Trace Toolkit Trace Control 0.40-26042007

Controlling trace : trace

Linux Trace Toolkit Trace Daemon 0.40-26042007

Reading from debugfs directory : /mnt/debugfs/ltt/trace
Writing to trace directory : /tmp/trace

Creating supplementary trace files
Appending facility file list.xml
Appending facility file locking.xml
Appending facility file kernel_arch_powerpc.xml
Appending facility file stack_arch_x86_64.xml
Appending facility file kernel_arch_i386.xml
Appending facility file kernel_arch_arm.xml
Appending facility file kernel_arch_x86_64.xml
Appending facility file kernel.xml
Appending facility file kernel_arch_mips.xml
Appending facility file kernel_arch_ppc.xml
Appending facility file fs.xml
Appending facility file net.xml
Appending facility file core.xml
Appending facility file mm.xml
Appending facility file kernel_arch_c2.xml
Appending facility file user_generic.xml
Appending facility file stack_arch_i386.xml
Appending facility file compact.xml
Appending facility file xen.xml

2. tried to use the sample-printf in the ltt-usertrace and stopped trace
after a while as follows:

[pradeep@fd0005 ltt-usertrace-0.32]$ sudo ./sample-printf
Will trace a printf of an incrementing counter.
Abort with CTRL-C.
No file is created with this example : it logs through a kernel
system call. See the LTTng lttctl command to start tracing.

[pradeep@fd0005 ltt-usertrace-0.32]$ sudo lttctl -n trace -R
Linux Trace Toolkit Trace Control 0.40-26042007

Controlling trace : trace

3. when I tried to view the trace with textDump as follows, no trace was
produced

[pradeep@fd0005 ltt-usertrace-0.32]$ sudo lttv -m textDump -t /tmp/trace
The input data file /tmp/trace/control/processes_0 does not contain a trace
The input data file /tmp/trace/control/interrupts_0 does not contain a trace
The input data file /tmp/trace/control/facilities_0 does not contain a trace
The input data file /tmp/trace/control/network_0 does not contain a trace
The input data file /tmp/trace/control/modules_0 does not contain a trace
The input data file /tmp/trace/cpu_0 does not contain a trace

** ERROR **: Trace /tmp/trace has no facility tracefile
aborting...
/usr/local/bin/lttv: line 15: 26289 Aborted                 $0.real $*
[pradeep@fd0005 ltt-usertrace-0.32]$ ls -l /tmp/trace/


OS and LTTng details
=====================
OS version: kernel-2.6.18
lttng version patch used : patch01-2.6.18-lttng-0.6.41
lttng-userspace app used: ltt-usertrace-0.32
trace toolkit viewer used: LinuxTraceToolkitViewer-0.8.82-09042007


dmesg output
============
[ 1674.624585] ltt-control init
[ 1680.208849] ltt-control ltt_control_input
[ 1680.208855] ltt_control : trace trace
[ 1680.208859] Creating trace trace
[ 1680.243713] ltt-control ltt_control_input
[ 1680.243719] ltt_control : trace trace
[ 1680.243723] Start tracing trace
[ 1680.243728] Dumping facility core
[ 1680.243734] Dumping facility locking
[ 1680.243740] Dumping facility statedump
[ 1680.243744] ltt_statedump_start
[ 1680.243746] do_ltt_statedump
[ 1680.255381] trace_statedump_statedump_end
[ 1728.012699] ltt-control ltt_control_input
[ 1728.012705] ltt_control : trace trace
[ 1728.012708] Stop tracing trace
[ 1728.043057] ltt-control ltt_control_input
[ 1728.043063] ltt_control : trace trace
[ 1728.043067] Destroying trace trace
[ 1728.072880] finish for cpu 0 , d85b786c
[ 1728.072885] finish for cpu 0 , ea764720
[ 1728.072888] finish for cpu 0 , df0fcd68
[ 1728.072890] finish for cpu 0 , eb396508
[ 1728.072893] finish for cpu 0 , f5a69c1c
[ 1728.072896] finish for cpu 0 , ea3ba37c
[ 1728.072917] LTT : unread channel facilities_ offset is 65536 and
cons_off : 0 (cpu 0)
[ 1728.072921] LTT : facilities_ : commit count : 65536, subbuf size 65536
[ 1728.072957] LTT : unread channel interrupts_ offset is 65536 and
cons_off : 0 (cpu 0)
[ 1728.072961] LTT : interrupts_ : commit count : 65536, subbuf size 65536
[ 1728.072991] LTT : unread channel processes_ offset is 262144 and
cons_off : 0 (cpu 0)
[ 1728.072995] LTT : processes_ : commit count : 262144, subbuf size 262144
[ 1728.073057] LTT : unread channel modules_ offset is 65536 and
cons_off : 0 (cpu 0)
[ 1728.073062] LTT : modules_ : commit count : 65536, subbuf size 65536
[ 1728.073089] LTT : unread channel cpu_ offset is 1048576 and cons_off
: 0 (cpu 0)
[ 1728.073093] LTT : cpu_ : commit count : 1048576, subbuf size 1048576
[ 1728.073239] LTT : unread channel network_ offset is 65536 and
cons_off : 0 (cpu 0)
[ 1728.073243] LTT : network_ : commit count : 65536, subbuf size 65536



I would really appreciate any help/pointers in this regard

Best Regards
Pradeep
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.5 (GNU/Linux)
Comment: Using GnuPG with Fedora - http://enigmail.mozdev.org

iD8DBQFGbcKY12kTuUTgP4YRAuMqAJ0WGxS5nxleTbFSMdXlgzt6Eh2GvgCg6a4y
tuYPwDhbtHiVgCo6pEg0SMs=
=TsGa
-----END PGP SIGNATURE-----