Re: problems with lttng-0.5.1/ltt-control-0.5/linux-2.6.14.1

Good point. The quickstart guide is not adapted to these old versions.
He should get the quickstart from the older LTTV packages instead of
fetching it from the website.

Mathieu

* Parissa Heidari ([email protected]) wrote:
> 
> Hi Mathieu,
> 
> This is an old version, I think it was using Relayfs instead of debugfs. 
> Regarding: 
> > Reading from relayfs directory : /media/debugfs/
> Could Relayfs cause the problem? 
> 
> Parissa. 
> 
> > Hi Martin,
> >
> > * Martin Robb ([email protected]) wrote:
> > > I am trying to use lttng with a Linux 2.6.14 kernel. I applied
> > > patch-2.6.14-lttng-0.5.1. I compiled ltt-control-0.5-06042006. However,
> > > I'm getting some run time errors. I've not used lttng before, so I'm
> > > probably just misunderstanding something. Any help on this would be most
> > > welcome.
> > >
> > > When I run the command:
> > >
> > > sudo lttctl -n trace -d -l /media/debugfs/ltt -t /tmp/trace
> >
> > This command looks ok
> >
> > > I get the error:
> > >
> > > Linux Trace Toolkit Trace Control
> > > Controlling trace : trace
> > > Create Trace Error: Failed to send netlink message: Connection refused
> >
> > It normally happen if the ltt-control.ko is not loaded/not builtin. It
> > is the netlink based control module.
> >
> > > Thinking that it may need some sort of daemon, and noticing an lttd
> > > command, I then tried:
> > >
> > > sudo lttd -t /tmp/trace -c /media/debugfs/
> >
> > This one should read "-c /media/debugfs/ltt", so you would not try files
> > outside of LTTng's realm.
> >
> > Please check if your ltt-control module is loaded appropriately and if
> > the ltt-control (userspace package) and lttng version match (see the
> > compatibility list on http://ltt.polymtl.ca). Since you are using an old
> > LTTng version, you might want to get a newer one and backport it, since
> > a _lot_ of things happened since then.
> >
> > Regards,
> >
> > Mathieu
> >
> > > Linux Trace Toolkit Trace Daemon
> > >
> > > Reading from relayfs directory : /media/debugfs/
> > >
> > > Writing to trace directory : /tmp/trace
> > >
> > > Creating trace subdirectory /tmp/trace
> > >
> > > Channel file : /media/debugfs//uhci
> > >
> > > Entering channel subdirectory...
> > >
> > > Creating trace subdirectory /tmp/trace/uhci
> > >
> > > Channel file : /media/debugfs//uhci/0000:00:1d.1
> > >
> > > Opening file.
> > >
> > > Channel file : /media/debugfs//uhci/0000:00:1d.0
> > >
> > > Opening file.
> > >
> > > Channel file : /media/debugfs//usbmon
> > >
> > > Entering channel subdirectory...
> > >
> > > Creating trace subdirectory /tmp/trace/usbmon
> > >
> > > Channel file : /media/debugfs//usbmon/3s
> > >
> > > Opening file.
> > >
> > > Channel file : /media/debugfs//usbmon/3t
> > >
> > > Opening file.
> > >
> > > Channel file : /media/debugfs//usbmon/2s
> > >
> > > Opening file.
> > >
> > > Channel file : /media/debugfs//usbmon/2t
> > >
> > > Opening file.
> > >
> > > Channel file : /media/debugfs//usbmon/1s
> > >
> > > Opening file.
> > >
> > > Channel file : /media/debugfs//usbmon/1t
> > >
> > > Opening file.
> > >
> > > Error in getting the number of subbuffers: Inappropriate ioctl for device
> > >
> > > I presume the ioctl error is the key. Here is the relevant configuration
> > > from my kernel .config file:
> > >
> > > #
> > >
> > > # Instrumentation Support
> > >
> > > #
> > >
> > > CONFIG_LTT=y
> > >
> > > CONFIG_LTT_TRACER=y
> > >
> > > CONFIG_LTT_ALIGNMENT=y
> > >
> > > CONFIG_LTT_HEARTBEAT=y
> > >
> > > CONFIG_LTT_FACILITY_CORE=y
> > >
> > > CONFIG_LTT_FACILITY_FS=y
> > >
> > > CONFIG_LTT_FACILITY_IPC=y
> > >
> > > CONFIG_LTT_FACILITY_KERNEL=y
> > >
> > > CONFIG_LTT_FACILITY_KERNEL_ARCH=y
> > >
> > > CONFIG_LTT_FACILITY_MEMORY=y
> > >
> > > CONFIG_LTT_FACILITY_NETWORK=y
> > >
> > > CONFIG_LTT_FACILITY_PROCESS=y
> > >
> > > CONFIG_LTT_FACILITY_SOCKET=y
> > >
> > > CONFIG_LTT_FACILITY_STATEDUMP=y
> > >
> > > CONFIG_LTT_FACILITY_TIMER=y
> > >
> > > ...
> > >
> > > #
> > >
> > > # Kernel hacking
> > >
> > > #
> > >
> > > # CONFIG_PRINTK_TIME is not set
> > >
> > > CONFIG_DEBUG_KERNEL=y
> > >
> > > CONFIG_MAGIC_SYSRQ=y
> > >
> > > CONFIG_LOG_BUF_SHIFT=17
> > >
> > > CONFIG_DETECT_SOFTLOCKUP=y
> > >
> > > # CONFIG_SCHEDSTATS is not set
> > >
> > > # CONFIG_DEBUG_SLAB is not set
> > >
> > > CONFIG_DEBUG_SPINLOCK=y
> > >
> > > CONFIG_DEBUG_SPINLOCK_SLEEP=y
> > >
> > > # CONFIG_DEBUG_KOBJECT is not set
> > >
> > > CONFIG_DEBUG_HIGHMEM=y
> > >
> > > CONFIG_DEBUG_BUGVERBOSE=y
> > >
> > > CONFIG_DEBUG_INFO=y
> > >
> > > CONFIG_DEBUG_FS=y
> > >
> > > # CONFIG_FRAME_POINTER is not set
> > >
> > > CONFIG_EARLY_PRINTK=y
> > >
> > > CONFIG_DEBUG_STACKOVERFLOW=y
> > >
> > > CONFIG_KPROBES=y
> > >
> > > CONFIG_DEBUG_STACK_USAGE=y
> > >
> > > # CONFIG_DEBUG_PAGEALLOC is not set
> > >
> > > CONFIG_4KSTACKS=y
> > >
> > > CONFIG_X86_FIND_SMP_CONFIG=y
> > >
> > > CONFIG_X86_MPPARSE=y
> > >
> > >
> > > Thanks,
> > > Martin Robb
> > >
> > >
> > >
> > > _______________________________________________
> > > Ltt-dev mailing list
> > > [email protected]
> > > http://listserv.shafik.org/mailman/listinfo/ltt-dev
> 

-- 
Mathieu Desnoyers
Computer Engineering Ph.D. Student, Ecole Polytechnique de Montreal
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F  BA06 3F25 A8FE 3BAE 9A68