[lttng-dev] Lttng start failed

Tue Jun 12 10:05:48 EDT 2012

* Pavan Anumula (pavan.anumula at sasken.com) wrote:
> Hi Mathieu,
> Still I am unable to start tracing, And I am facing the same start  errors. Please kindly help me on this.
> This time I loaded the modules by modprobe( not with insmod as I did  before), Then I run the command  " arm-none-linux-gnueabi-lttng-sessiond  -vvv " (before arm-none-linux-gnueabi-lttng-sessiond  -d),

When using "arm-none-linux-gnueabi-lttng-sessiond  -vvv", you should
_not_ run "arm-none-linux-gnueabi-lttng-sessiond  -d".

> The below is the Output, And It got hanged overthere.

This is normal: the sessiond is waiting for applications to connect. It
does not hang, it just waits.

David, can you follow up on this issue ? It seems to be
sessiond-related.

Thanks,

Mathieu

> Later when I started lttng start I am acing the same erros below:
>  root at arago:~/lttng-traces# arm-none-linux-gnueabi-lttng start
> LTTng: Failure to write metadata to buffers (timeout)
> Error: Starting kernel trace failed
> 
> ************************************************************************************************
> DEBUG3: Creating LTTng run directory: /var/run/lttng [in create_lttng_rundir() at main.c:4315]
> DEBUG2: Kernel consumer err path: /var/run/lttng/kconsumerd/error [in main() at main.c:4543]
> DEBUG2: Kernel consumer cmd path: /var/run/lttng/kconsumerd/command [in main() at main.c:4545]
> DEBUG1: Client socket path /var/run/lttng/client-lttng-sessiond [in main() at main.c:4592]
> DEBUG1: Application socket path /var/run/lttng/apps-lttng-sessiond [in main() at main.c:4593]
> DEBUG1: LTTng run directory path: /var/run/lttng [in main() at main.c:4594]
> DEBUG2: UST consumer 32 bits err path: /var/run/lttng/ustconsumerd32/error [in main() at main.c:4603]
> DEBUG2: UST consumer 32 bits cmd path: /var/run/lttng/ustconsumerd32/command [in main() at main.c:4605]
> DEBUG2: UST consumer 64 bits err path: /var/run/lttng/ustconsumerd64/error [in main() at main.c:4614]
> DEBUG2: UST consumer 64 bits cmd path: /var/run/lttng/ustconsumerd64/command [in main() at main.c:4616]
> DEBUG3: Created hashtable size 4 at 0x4a080 of type 1 [in lttng_ht_new() at hashtable.c:96]
> DEBUG3: Created hashtable size 4 at 0x4a168 of type 1 [in lttng_ht_new() at hashtable.c:96]
> DEBUG2: Creating consumer directory: /var/run/lttng/kconsumerd [in set_consumer_sockets() at main.c:4357]
> DEBUG1: Modprobe successfully lttng-tracer [in modprobe_lttng_control() at modprobe.c:163]
> DEBUG2: Kernel tracer version validated (major version 2) [in kernel_validate_version() at kernel.c:675]
> DEBUG1: Modprobe successfully lttng-ftrace [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-kprobes [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-kretprobes [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-lib-ring-buffer [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-ring-buffer-client-discard [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-ring-buffer-client-overwrite [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-ring-buffer-metadata-client [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-ring-buffer-client-mmap-discard [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-ring-buffer-client-mmap-overwrite [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-ring-buffer-metadata-mmap-client [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-probe-lttng [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-types [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-probe-block [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-probe-irq [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-probe-kvm [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-probe-sched [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-probe-signal [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-probe-statedump [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Modprobe successfully lttng-probe-timer [in modprobe_lttng_data() at modprobe.c:199]
> DEBUG1: Kernel tracer fd 6 [in init_kernel_tracer() at main.c:1887]
> DEBUG2: Creating consumer directory: /var/run/lttng/ustconsumerd64 [in set_consumer_sockets() at main.c:4357]
> DEBUG2: Creating consumer directory: /var/run/lttng/ustconsumerd32 [in set_consumer_sockets() at main.c:4357]
> DEBUG1: Signal handler set for SIGTERM, SIGPIPE and SIGINT [in set_signal_handler() at main.c:4449]
> DEBUG1: All permissions are set [in set_permissions() at main.c:4250]
> DEBUG1: poll set max size set to 65535 [in compat_poll_set_max_size() at compat-poll.c:196]
> DEBUG1: [thread] Manage application started [in thread_manage_apps() at main.c:1179]
> DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> DEBUG1: fd 13 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> DEBUG1: Apps thread polling on 2 fds [in thread_manage_apps() at main.c:1200]
> DEBUG1: Thread manage kernel started [in thread_manage_kernel() at main.c:876]
> DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> DEBUG1: fd 11 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> DEBUG1: Updating kernel poll set [in update_kernel_poll() at main.c:748]
> DEBUG1: Thread kernel polling on 2 fds [in thread_manage_kernel() at main.c:905]
> DEBUG1: [thread] Manage application registration started [in thread_registration_apps() at main.c:1392]
> DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> DEBUG1: fd 10 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> DEBUG1: Notifying applications of session daemon state: 1 [in notify_ust_apps() at main.c:687]
> DEBUG1: [thread] Dispatch UST command started [in thread_dispatch_ust_registration() at main.c:1324]
> DEBUG1: Futex n to 1 prepare done [in futex_nto1_prepare() at futex.c:73]
> DEBUG1: Woken up but nothing in the UST command queue [in thread_dispatch_ust_registration() at main.c:1334]
> DEBUG1: [thread] Manage client started [in thread_manage_clients() at main.c:3794]
> DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> DEBUG1: fd 9 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> DEBUG1: Accepting client command ... [in thread_manage_clients() at main.c:3826]
> DEBUG1: Got the wait shm fd 15 [in get_wait_shm() at shm.c:117]
> DEBUG1: Futex wait update active 1 [in futex_wait_update() at futex.c:62]
> DEBUG1: Accepting application registration [in thread_registration_apps() at main.c:1423]
> ********************************************************************************************************
> Am I missing anything??
> 
> Thanks in Advance,
> Pavan
> 
> 
> ________________________________________
> From: Mathieu Desnoyers [mathieu.desnoyers at efficios.com]
> Sent: Monday, June 11, 2012 7:24 PM
> To: Pavan Anumula
> Cc: lttng-dev at lists.lttng.org
> Subject: Re: [lttng-dev] Lttng start failed
> 
> * Pavan Anumula (pavan.anumula at sasken.com) wrote:
> > Hi Mathieu,
> >
> > Please find the info below as per your comments
> >
> >
> > ########## Output of  command "arm-none-linux-gnueabi-lttng-sessiond -vvv " , After loading the modules #######
> >
> > DEBUG3: Creating LTTng run directory: /var/run/lttng [in create_lttng_rundir() at main.c:4315]
> > DEBUG2: Kernel consumer err path: /var/run/lttng/kconsumerd/error [in main() at main.c:4543]
> > DEBUG2: Kernel consumer cmd path: /var/run/lttng/kconsumerd/command [in main() at main.c:4545]
> > DEBUG1: Client socket path /var/run/lttng/client-lttng-sessiond [in main() at main.c:4592]
> > DEBUG1: Application socket path /var/run/lttng/apps-lttng-sessiond [in main() at main.c:4593]
> > DEBUG1: LTTng run directory path: /var/run/lttng [in main() at main.c:4594]
> > DEBUG2: UST consumer 32 bits err path: /var/run/lttng/ustconsumerd32/error [in main() at main.c:4603]
> > DEBUG2: UST consumer 32 bits cmd path: /var/run/lttng/ustconsumerd32/command [in main() at main.c:4605]
> > DEBUG2: UST consumer 64 bits err path: /var/run/lttng/ustconsumerd64/error [in main() at main.c:4614]
> > DEBUG2: UST consumer 64 bits cmd path: /var/run/lttng/ustconsumerd64/command [in main() at main.c:4616]
> > DEBUG3: Created hashtable size 4 at 0x4a080 of type 1 [in lttng_ht_new() at hashtable.c:96]
> > DEBUG3: Created hashtable size 4 at 0x4a168 of type 1 [in lttng_ht_new() at hashtable.c:96]
> > DEBUG2: Creating consumer directory: /var/run/lttng/kconsumerd [in set_consumer_sockets() at main.c:4357]
> > FATAL: Module lttng_tracer not found.
> > Error: Unable to load module lttng-tracer
> 
> Hrm. You want to do kernel tracing, but modprobe cannot find the lttng
> kernel tracer modules. You might want to run depmod -a or something like
> that on your target, and ensure that modprobe works properly.
> 
> Thanks,
> 
> Mathieu
> 
> > DEBUG2: Kernel tracer version validated (major version 2) [in kernel_validate_version() at kernel.c:675]
> > DEBUG1: Modprobe successfully lttng-ftrace [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Modprobe successfully lttng-kprobes [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Modprobe successfully lttng-kretprobes [in modprobe_lttng_data() at modprobe.c:199]
> > FATAL: Module lttng_lib_ring_buffer not found.
> > Error: Unable to load module lttng-lib-ring-buffer
> > FATAL: Module lttng_ring_buffer_client_discard not found.
> > Error: Unable to load module lttng-ring-buffer-client-discard
> > FATAL: Module lttng_ring_buffer_client_overwrite not found.
> > Error: Unable to load module lttng-ring-buffer-client-overwrite
> > FATAL: Module lttng_ring_buffer_metadata_client not found.
> > Error: Unable to load module lttng-ring-buffer-metadata-client
> > FATAL: Module lttng_ring_buffer_client_mmap_discard not found.
> > Error: Unable to load module lttng-ring-buffer-client-mmap-discard
> > FATAL: Module lttng_ring_buffer_client_mmap_overwrite not found.
> > Error: Unable to load module lttng-ring-buffer-client-mmap-overwrite
> > FATAL: Module lttng_ring_buffer_metadata_mmap_client not found.
> > Error: Unable to load module lttng-ring-buffer-metadata-mmap-client
> > FATAL: Module lttng_probe_lttng not found.
> > Error: Unable to load module lttng-probe-lttng
> > DEBUG1: Modprobe successfully lttng-types [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Modprobe successfully lttng-probe-block [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Modprobe successfully lttng-probe-irq [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Modprobe successfully lttng-probe-kvm [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Modprobe successfully lttng-probe-sched [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Modprobe successfully lttng-probe-signal [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Modprobe successfully lttng-probe-statedump [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Modprobe successfully lttng-probe-timer [in modprobe_lttng_data() at modprobe.c:199]
> > DEBUG1: Kernel tracer fd 6 [in init_kernel_tracer() at main.c:1887]
> > DEBUG2: Creating consumer directory: /var/run/lttng/ustconsumerd64 [in set_consumer_sockets() at main.c:4357]
> > DEBUG2: Creating consumer directory: /var/run/lttng/ustconsumerd32 [in set_consumer_sockets() at main.c:4357]
> > DEBUG1: Signal handler set for SIGTERM, SIGPIPE and SIGINT [in set_signal_handler() at main.c:4449]
> > DEBUG1: All permissions are set [in set_permissions() at main.c:4250]
> > DEBUG1: poll set max size set to 65535 [in compat_poll_set_max_size() at compat-poll.c:196]
> > DEBUG1: [thread] Manage client started [in thread_manage_clients() at main.c:3794]
> > DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: fd 9 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: Accepting client command ... [in thread_manage_clients() at main.c:3826]
> > DEBUG1: [thread] Dispatch UST command started [in thread_dispatch_ust_registration() at main.c:1324]
> > DEBUG1: Futex n to 1 prepare done [in futex_nto1_prepare() at futex.c:73]
> > DEBUG1: Woken up but nothing in the UST command queue [in thread_dispatch_ust_registration() at main.c:1334]
> > DEBUG1: Thread manage kernel started [in thread_manage_kernel() at main.c:876]
> > DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: fd 11 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: Updating kernel poll set [in update_kernel_poll() at main.c:748]
> > DEBUG1: Thread kernel polling on 2 fds [in thread_manage_kernel() at main.c:905]
> > DEBUG1: [thread] Manage application started [in thread_manage_apps() at main.c:1179]
> > DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: fd 13 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: Apps thread polling on 2 fds [in thread_manage_apps() at main.c:1200]
> > DEBUG1: [thread] Manage application registration started [in thread_registration_apps() at main.c:1392]
> > DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: fd 10 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: Notifying applications of session daemon state: 1 [in notify_ust_apps() at main.c:687]
> > DEBUG1: Got the wait shm fd 15 [in get_wait_shm() at shm.c:117]
> > DEBUG1: Futex wait update active 1 [in futex_wait_update() at futex.c:62]
> > DEBUG1: Accepting application registration [in thread_registration_apps() at main.c:1423]
> >
> >
> >
> > #### Output of  command "arm-none-linux-gnueabi-lttng-sessiond -vvv "  before loading the modules #############
> >
> > DEBUG3: Creating LTTng run directory: /var/run/lttng [in create_lttng_rundir() at main.c:4315]
> > DEBUG2: Kernel consumer err path: /var/run/lttng/kconsumerd/error [in main() at main.c:4543]
> > DEBUG2: Kernel consumer cmd path: /var/run/lttng/kconsumerd/command [in main() at main.c:4545]
> > DEBUG1: Client socket path /var/run/lttng/client-lttng-sessiond [in main() at main.c:4592]
> > DEBUG1: Application socket path /var/run/lttng/apps-lttng-sessiond [in main() at main.c:4593]
> > DEBUG1: LTTng run directory path: /var/run/lttng [in main() at main.c:4594]
> > DEBUG2: UST consumer 32 bits err path: /var/run/lttng/ustconsumerd32/error [in main() at main.c:4603]
> > DEBUG2: UST consumer 32 bits cmd path: /var/run/lttng/ustconsumerd32/command [in main() at main.c:4605]
> > DEBUG2: UST consumer 64 bits err path: /var/run/lttng/ustconsumerd64/error [in main() at main.c:4614]
> > DEBUG2: UST consumer 64 bits cmd path: /var/run/lttng/ustconsumerd64/command [in main() at main.c:4616]
> > DEBUG3: Created hashtable size 4 at 0x4a080 of type 1 [in lttng_ht_new() at hashtable.c:96]
> > DEBUG3: Created hashtable size 4 at 0x4a168 of type 1 [in lttng_ht_new() at hashtable.c:96]
> > DEBUG2: Creating consumer directory: /var/run/lttng/kconsumerd [in set_consumer_sockets() at main.c:4357]
> > FATAL: Module lttng_tracer not found.
> > Error: Unable to load module lttng-tracer
> > DEBUG1: Failed to open /proc/lttng [in init_kernel_tracer() at main.c:1871]
> > Error: Unable to remove module lttng-tracer
> > Warning: No kernel tracer available
> > DEBUG2: Creating consumer directory: /var/run/lttng/ustconsumerd64 [in set_consumer_sockets() at main.c:4357]
> > DEBUG2: Creating consumer directory: /var/run/lttng/ustconsumerd32 [in set_consumer_sockets() at main.c:4357]
> > DEBUG1: Signal handler set for SIGTERM, SIGPIPE and SIGINT [in set_signal_handler() at main.c:4449]
> > DEBUG1: All permissions are set [in set_permissions() at main.c:4250]
> > DEBUG1: poll set max size set to 65535 [in compat_poll_set_max_size() at compat-poll.c:196]
> > DEBUG1: [thread] Manage application started [in thread_manage_apps() at main.c:1179]
> > DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: fd 12 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: Apps thread polling on 2 fds [in thread_manage_apps() at main.c:1200]
> > DEBUG1: Thread manage kernel started [in thread_manage_kernel() at main.c:876]
> > DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: fd 10 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: Updating kernel poll set [in update_kernel_poll() at main.c:748]
> > DEBUG1: Thread kernel polling on 2 fds [in thread_manage_kernel() at main.c:905]
> > DEBUG1: [thread] Manage application registration started [in thread_registration_apps() at main.c:1392]
> > DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: fd 9 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: Notifying applications of session daemon state: 1 [in notify_ust_apps() at main.c:687]
> > DEBUG1: [thread] Dispatch UST command started [in thread_dispatch_ust_registration() at main.c:1324]
> > DEBUG1: Futex n to 1 prepare done [in futex_nto1_prepare() at futex.c:73]
> > DEBUG1: Woken up but nothing in the UST command queue [in thread_dispatch_ust_registration() at main.c:1334]
> > DEBUG1: [thread] Manage client started [in thread_manage_clients() at main.c:3794]
> > DEBUG1: fd 3 of 1 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: fd 8 of 2 added to pollfd [in compat_poll_add() at compat-poll.c:91]
> > DEBUG1: Accepting client command ... [in thread_manage_clients() at main.c:3826]
> > DEBUG1: Got the wait shm fd 14 [in get_wait_shm() at shm.c:117]
> > DEBUG1: Futex wait update active 1 [in futex_wait_update() at futex.c:62]
> > DEBUG1: Accepting application registration [in thread_registration_apps() at main.c:1423]
> >
> >
> > Regards,
> > Pavan
> >
> > -----Original Message-----
> > From: Mathieu Desnoyers [mailto:mathieu.desnoyers at efficios.com]
> > Sent: Saturday, June 09, 2012 6:03 PM
> > To: Pavan Anumula
> > Cc: lttng-dev at lists.lttng.org
> > Subject: Re: [lttng-dev] Lttng start failed
> >
> > * Pavan Anumula (pavan.anumula at sasken.com) wrote:
> > > Hi Mathue,
> > >
> > > Thanks for the quick reply,
> > >
> > > After inserting lttng modules , I had given the command  "arm-none-linux-gnueabi-lttng-sessiond -vvv"  as you said, Below is the output where there are error messages. Please help me in resolving the issue, SO that I can catch kernel and user traces.
> > >
> > >
> > > root at arago:/usr/lttng/modules# arm-none-linux-gnueabi-lttng-sessiond
> > > -d root at arago:/usr/lttng/modules#
> > > arm-none-linux-gnueabi-lttng-sessiond -vvv
> > > DEBUG3: Creating LTTng run directory: /var/run/lttng [in
> > > create_lttng_rundir() at main.c:4315]
> > > DEBUG2: Kernel consumer err path: /var/run/lttng/kconsumerd/error [in
> > > main() at main.c:4543]
> > > DEBUG2: Kernel consumer cmd path: /var/run/lttng/kconsumerd/command
> > > [in main() at main.c:4545]
> > > DEBUG1: Client socket path /var/run/lttng/client-lttng-sessiond [in
> > > main() at main.c:4592]
> > > DEBUG1: Application socket path /var/run/lttng/apps-lttng-sessiond [in
> > > main() at main.c:4593]
> > > DEBUG1: LTTng run directory path: /var/run/lttng [in main() at
> > > main.c:4594]
> > > DEBUG2: UST consumer 32 bits err path:
> > > /var/run/lttng/ustconsumerd32/error [in main() at main.c:4603]
> > > DEBUG2: UST consumer 32 bits cmd path:
> > > /var/run/lttng/ustconsumerd32/command [in main() at main.c:4605]
> > > DEBUG2: UST consumer 64 bits err path:
> > > /var/run/lttng/ustconsumerd64/error [in main() at main.c:4614]
> > > DEBUG2: UST consumer 64 bits cmd path:
> > > /var/run/lttng/ustconsumerd64/command [in main() at main.c:4616]
> > > Error: Already running daemon.
> >
> > Please kill the lttng-sessiond that is already started (the one with -d). Instead of that one, run the sessiond with:
> >
> > lttng-sessiond -vvv
> >
> > (don't run lttng-sessiond -d before)
> >
> > Thanks,
> >
> > Mathieu
> >
> > >
> > >
> > >
> > >
> > > Thanks in advance,
> > > Pavan
> > >
> > > -----Original Message-----
> > > From: Mathieu Desnoyers [mailto:mathieu.desnoyers at efficios.com]
> > > Sent: Friday, June 08, 2012 11:12 PM
> > > To: Pavan Anumula
> > > Cc: lttng-dev at lists.lttng.org
> > > Subject: Re: [lttng-dev] Lttng start failed
> > >
> > > * Pavan Anumula (pavan.anumula at sasken.com) wrote:
> > > > Hi ,
> > > >
> > > > I am new to LTTng usage, I am trying to use LTTng 2.0.1 and LTTng-modules-2.0.2  for ARM(omapL138), with Linux kernel 2.6.33 wit RT-29 patch on it.
> > > >
> > > > After enabling all the kernel events I am facing the below errors. I loaded all the modules manually by insmod.
> > > >
> > > >
> > > >
> > > > root at arago:~/lttng-traces# arm-none-linux-gnueabi-lttng create
> > > > newsessiom Session newsessiom created.
> > > > Traces will be written in
> > > > /home/root/lttng-traces/newsessiom-20110325-154922
> > > >
> > > > root at arago:~/lttng-traces# arm-none-linux-gnueabi-lttng enable-event
> > > > -a --kernel All kernel events are enabled in channel channel0
> > > >
> > > > root at arago:~/lttng-traces# arm-none-linux-gnueabi-lttng start
> > > > LTTng: Failure to write metadata to buffers (timeout)
> > > > Error: Starting kernel trace failed
> > > >
> > > > Please kindly help me on this.
> > >
> > > I think you should look into the lttng-sessiond --help :
> > >
> > >       --consumerd32-path PATH     Specify path for the 32-bit UST consumer daemon binary
> > >       --consumerd32-libdir PATH   Specify path for the 32-bit UST consumer daemon libraries
> > >       --consumerd64-path PATH     Specify path for the 64-bit UST consumer daemon binary
> > >       --consumerd64-libdir PATH   Specify path for the 64-bit UST consumer daemon libraries
> > >
> > > options. My guess is that lttng-sessiond is not able to find the consumerd binary files, maybe due to a rename or because they have been moved after install.
> > >
> > > One more thing that might help is to launch the lttng-sessiond with "-vvv" : it will provide verbose output and let us know where things fall apart.
> > >
> > > Thanks,
> > >
> > > Mathieu
> > >
> > >
> > > >
> > > >
> > > > Thanks in advance,
> > > > Pavan
> > > >
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> > >
> > >
> > > --
> > > Mathieu Desnoyers
> > > Operating System Efficiency R&D Consultant EfficiOS Inc.
> > > http://www.efficios.com
> >
> > --
> > Mathieu Desnoyers
> > Operating System Efficiency R&D Consultant EfficiOS Inc.
> > http://www.efficios.com
> 
> --
> Mathieu Desnoyers
> Operating System Efficiency R&D Consultant
> EfficiOS Inc.
> http://www.efficios.com

-- 
Mathieu Desnoyers
Operating System Efficiency R&D Consultant
EfficiOS Inc.
http://www.efficios.com