[lttng-dev] Lttng start failed
David Goulet
dgoulet at efficios.com
Tue Jun 12 11:34:39 EDT 2012
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Hi Pavan,
The output below is normal and should be working fine. However, the problem is
that you have _NO_ debug message after the "lttng start". That command should
at least produce 10+ lines of messages after this last line:
"DEBUG1: Accepting application registration [in thread_registration_apps() at
main.c:1423]"
Can you enlight me and tell me if by doing "lttng create newsessiom" and
"lttng enable-event -a -k", you have output messages coming out of the session
daemon in -vvv mode ?
If NOT, you are talking to another daemon! A quick "ps faux | grep
lttng-sessiond" could help clear that question.
If only one daemon is running and stuck at the above debug message, the next
step is to tell me on what the daemon is waiting on using either "strace -p"
or "gdb" also. There is 6 threads so having the strace -p output for all of
them would help me greatly.
Thanks!
David
On 12/06/12 10:05 AM, Mathieu Desnoyers wrote:
> * 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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>>>>
>>>>> _______________________________________________ lttng-dev mailing
>>>>> list lttng-dev at lists.lttng.org
>>>>> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>>>>
>>>>
>>>> -- 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
>
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