[ltt-dev] latest LTTng on 64bit RHEL

[Mathieu Desnoyers]

BTW, there are improvements to LTTV on their way that will permit to
automatically synchronize traces collected from networked nodes from the
TCP traffic sequence numbers or added UDP synchronization.

That might be something you'd like to look at. I'm CCing Benjamin
Poirier who is currently finishing his masters on this. He is in the
process of integrating the resulting algorithms to LTTV.

Mathieu


* Martin Kosina (martin_kosina at yahoo.com) wrote:
> Yep, module loading problem between the two OS flavors, sorry for the dumb
> question!
> Wonderful tool, btw, just starting to learn how to interpret all the
> data. We are looking into a more sophisticated / continuous profiling of a
> network management system that collects data from hundreds of thousands of
> devices (smart power grid infrastructure), looks like LTTng might work very
> well.
> 
> Best,
> Martin
> 
> 
> On Thu, Oct 15, 2009 at 6:53 PM, Mathieu Desnoyers <
> compudj at krystal.dyndns.org> wrote:
> 
> > * Martin Kosina (martin_kosina at yahoo.com) wrote:
> > > Hi guys,
> > >
> > > Are there any known issues with running LTTng on em64t, specifically on
> > > RHEL5 ? The traces run normally, but are basically empty, just a single
> > > "unknown process" and just a bunch of "MODE_UNKNOWN" messages in the
> > Event
> > > Viewer and no timelines.
> > >
> > > Kernel is a 2.6.30.9 (built from git://
> > > git.kernel.org/pub/scm/linux/kernel/git/compudj/linux-2.6-lttng.git on
> > the
> > > traced  host), latest ltt-control, and lttv from git. Traces built from
> > the
> > > same sources on ia32 are working fine there. (The GUI is running on a
> > 32-bit
> > > box mounting the other machine's /tmp, FWIW).
> > >
> > > Thanks,
> > > Martin
> > >
> > >
> > > P.S. It all looks pretty normal when arming/running/stopping:
> > >
> > > [mkosina at metersim04 lttv]$ sudo /usr/local/bin/ltt-armall
> > > Connecting all markers
> > > Connecting /mnt/debugfs/ltt/markers/input/input_event
> > > Connecting /mnt/debugfs/ltt/markers/irq_state/idt_table
> > > Connecting /mnt/debugfs/ltt/markers/module_state/list_module
> > > Connecting /mnt/debugfs/ltt/markers/softirq_state/softirq_vec
> > > Connecting /mnt/debugfs/ltt/markers/swap_state/statedump_swap_files
> > > Connecting /mnt/debugfs/ltt/markers/syscall_state/sys_call_table
> > >
> >
> > Hrm, it looks like your LTTng probe modules are either not compiled or
> > not loaded.
> >
> > Can you give us a copy of your kernel .config and lsmod output ?
> >
> > Mathieu
> >
> > > [mkosina at metersim04 lttv]$ sudo /usr/local/bin/lttctl -C --channel_root
> > > /mnt/debugfs/ltt -w /tmp/trace1 -o channel.all.overwrite=0 -n 1 trace
> > >
> > > Linux Trace Toolkit Trace Control 0.71-30092009
> > >
> > > Controlling trace : trace
> > >
> > > lttctl: Creating trace
> > > lttctl: Forking lttd
> > > Linux Trace Toolkit Trace Daemon 0.71-30092009
> > >
> > > Reading from debugfs directory : /mnt/debugfs/ltt/trace
> > > Writing to trace directory : /tmp/trace1
> > >
> > > [mkosina at metersim04 lttv]$ sudo /usr/local/bin/lttctl -D trace
> > > Linux Trace Toolkit Trace Control 0.71-30092009
> > >
> > > Controlling trace : trace
> > >
> > > lttctl: Pausing trace
> > > lttctl: Destroying trace
> >
> > > _______________________________________________
> > > ltt-dev mailing list
> > > ltt-dev at lists.casi.polymtl.ca
> > > http://lists.casi.polymtl.ca/cgi-bin/mailman/listinfo/ltt-dev
> >
> >
> > --
> > Mathieu Desnoyers
> > OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68
> >

-- 
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68