[ltt-dev] Trouble acquiring/displaying traces

[Mathieu Desnoyers]

Can you give me the content of the control/ trace subdirectory ?

Also an hexdump of the facilities_* files (only the 20 first lines).

Thanks,

Mathieu

* Thomas E. Besemer (tbesemer at thomas-iv.com) wrote:
> Hi Mathieu (and all  on list) -
>
> Thanks for correcting my problems on patch install; it was
> operator error on my part.  I got patched, compiled, linked
> and booted, but seem to be having trouble getting traces
> (see end of email).
>
> Note that everything in LTT is compiled into the Kernel,
> no modules.
>
> Between starting and stoping trace, I ran some commands, and
> tar'd up a directory to show I/O, etc...
>
> Below is a sequence of what I am doing.
>
> All help appreciated.
>
> Thanks,
>
> tom
>
> --
> Installed Patches/tools, 2.6.25.4 Kernel:
>
> patch-2.6.25.4-lttng-0.10-pre55
> ltt-control-0.48-27022008
> lttv-0.10.0-pre13-27052008
>
> --
> Boot Messages:
>
> LTT : ltt-heartbeat init
> LTT : ltt-heartbeat init
> Requested number of bits 11
> Available number of bits 11
> Heartbeat timer will fire each 33 jiffies.
> Compact TSC init : truncate 8 lsb, cutoff 3 msb.
> LTT : ltt-relay init
> ltt-control init
> LTT : State dump init
> Data shifted from 24 bits
> 3 bits used for event IDs, 8 available for data.
>
>
> ---
> LTT Arm All Messages:
>
> [root at sn-sj26 tbesemer]# ltt-armall
> Loading probes
> FATAL: Could not load /lib/modules/2.6.25.4/modules.dep: No such file or 
> directory
> Connecting all markers
> Connecting internal_kernel_sched_schedule
> Connecting fs_buffer_wait_end
> Connecting fs_buffer_wait_start
> Connecting fs_close
> Connecting fs_exec
> Connecting fs_ioctl
> Connecting fs_llseek
>
> [snip much - lot's of output here]
>
>
> ---
> Starting Trace:
>
> [root at sn-sj26 tbesemer]# lttctl -n trace -d -l /mnt/debugfs/ltt -t /tmp/ltt
> Linux Trace Toolkit Trace Control 0.48-27022008
>
> Controlling trace : trace
>
> Linux Trace Toolkit Trace Daemon 0.48-27022008
>
> Reading from debugfs directory : /mnt/debugfs/ltt/trace
> Writing to trace directory : /tmp/ltt
>
> [root at sn-sj26 tbesemer]#
>
>
> ---
> Stoping Trace:
>
> [root at sn-sj26 tbesemer]# lttctl -n trace -R
> Linux Trace Toolkit Trace Control 0.48-27022008
>
> Controlling trace : trace
>
> [root at sn-sj26 tbesemer]#
>
>
> ---
> What's in /tmp/ltt:
>
> [root at sn-sj26 tbesemer]# ls -rtl /tmp/ltt
> total 8232
> drwxr-xr-x 2 root root    4096 May 30 11:43 eventdefs
> drwxr-xr-x 2 root root    4096 May 30 11:43 control
> -rwxr-xr-x 1 root root 1048576 May 30 11:45 cpu_7
> -rwxr-xr-x 1 root root 1048576 May 30 11:45 cpu_6
> -rwxr-xr-x 1 root root 1048576 May 30 11:45 cpu_5
> -rwxr-xr-x 1 root root 1048576 May 30 11:45 cpu_4
> -rwxr-xr-x 1 root root 1048576 May 30 11:45 cpu_3
> -rwxr-xr-x 1 root root 1048576 May 30 11:45 cpu_2
> -rwxr-xr-x 1 root root 1048576 May 30 11:45 cpu_1
> -rwxr-xr-x 1 root root 1048576 May 30 11:45 cpu_0
> -rwxr-xr-x 1 root root       0 Jun  8 10:35 compact_7
> -rwxr-xr-x 1 root root       0 Jun  8 10:35 compact_6
> -rwxr-xr-x 1 root root       0 Jun  8 10:35 compact_5
> -rwxr-xr-x 1 root root       0 Jun  8 10:35 compact_4
> -rwxr-xr-x 1 root root       0 Jun  8 10:35 compact_3
> -rwxr-xr-x 1 root root       0 Jun  8 10:35 compact_2
> -rwxr-xr-x 1 root root       0 Jun  8 10:35 compact_1
> -rwxr-xr-x 1 root root       0 Jun  8 10:35 compact_0
> [root at sn-sj26 tbesemer]#
>
>
>
> ---
> Doing Basic dump of Trace:
>
> [root at sn-sj26 tbesemer]# lttv -m textDump -t /tmp/ltt
> The input data file /tmp/ltt/compact_5 does not contain a trace
> The input data file /tmp/ltt/compact_6 does not contain a trace
>
> ** (process:10083): WARNING **: Unsupported trace version : 0.8
>
> ** (process:10083): WARNING **: parse_trace_header error
> The input data file /tmp/ltt/compact_4 does not contain a trace
>
> ** (process:10083): WARNING **: Unsupported trace version : 0.8
>
> ** (process:10083): WARNING **: parse_trace_header error
> The input data file /tmp/ltt/compact_3 does not contain a trace
> The input data file /tmp/ltt/compact_7 does not contain a trace
>
> ** (process:10083): WARNING **: Unsupported trace version : 0.8
>
> [snip lot's of similar output, finishing with this below]
>
>
> ** (process:10665): WARNING **: parse_trace_header error
> The input data file /tmp/ltt/compact_2 does not contain a trace
>
> ** ERROR **: Trace /tmp/ltt has no facility tracefile
> aborting...
> /workspace/tbesemer/local/bin/lttv: line 15: 10665 Aborted $0.real $*
> [root at sn-sj26 tbesemer]#
>
>
>
>
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-- 
Mathieu Desnoyers
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