Hi Wolfgang,
See inline edit.
On 2015-03-16 02:50 PM, Wolfgang Rostek wrote:
Hi group,
I'm a bit frustrated not passing the hello world level.
But I'm eager to get access to this nice tooling.
We'll make sure this happen :).
For now I'm assuming problems in access rights or
may be a 32/64bit library mismatch. Here my stackoverflow
On session creation you can use -o to specify an output PATH.
post which wasn't responded. Hope I'll get a push here.
thanks
Wolfgang R.
========================================================
LTTng at the very beginning
just at step zero of using lttng but can't pass it. Hope a small hint
gives me a push.
Trying the run the most simple demo of the distribution
lttng-ust/doc/examples/demo.
Okai so just to be sure I tested the demo and everything work as
expected let's see what is missing on your side.
Did you build from source or you got binary from a package manager ?
cat README
...
The simplest command to trace the demo program are:
lttng create
lttng enable-event -u -a
lttng start
./demo-trace
lttng destroy
That will create a trace in your $HOME/lttng-traces directory.
...
Put my user lttng-sessiond in verbose mode and can talk to it. Here
the state when the demo-trace starts
What do you mean by talk to it?
row@cobra7:/$ lttng list auto-20150313-091148
Tracing session auto-20150313-091148: [active]
Trace path: /home/local/ESG_GMBH/row/lttng-traces/auto-20150313-091148
=== Domain: UST global ===
Buffer type: per UID
Channels:
-------------
- channel0: [enabled]
Attributes:
overwrite mode: 0
subbufers size: 131072
number of subbufers: 4
switch timer interval: 0
read timer interval: 0
output: mmap()
Events:
* (type: tracepoint) [enabled]
Looks fine so far.
Executing the demo-trace shows no reaction in the daemon shell and no
output file created. Below the client log.
I can't see any problem reported and don't know what to check next.
Are you sure you got nothing ? Try lttng view if you have babeltrace
installed.
Also did you start the daemon in verbose mode ? Otherwise it is expected
to have no output.
thanks in advance for feedback
Wolfgang R.
row@cobra7:~/lttng_source/lttng-ust/doc/examples/demo$ export
LD_LIBRARY_PATH=/lib:/usr/lib:/usr/local/lib
Any particuliar reason to do an export LD_LIBRARY_PATH?
row@cobra7:~/lttng_source/lttng-ust/doc/examples/demo$ ./demo-trace
If you want to have more time to test you might want to add a sleep()
into the for loop in demo.c and put a higher loop threshold.
You will be able to test lttng list -u. Even if it looks like the events
got registered, it is a good start to pinpoint the problem.
Also you can start the sessiond with -vvv for a more verbose mode as you
probably know it.
Cheers!
liblttng_ust_tracepoint[17268/17268]: just registered a tracepoints
section from 0xb754f780 and having 2 tracepoints (in
tracepoint_register_lib() at tracepoint.c:767)
liblttng_ust_tracepoint[17268/17268]: registered tracepoint:
ust_baddr_statedump:soinfo (in tracepoint_register_lib() at
tracepoint.c:772)
liblttng_ust_tracepoint[17268/17268]: registered tracepoint:
lttng_ust_tracef:event (in tracepoint_register_lib() at tracepoint.c:772)
libust[17268/17268]: Provider "ust_baddr_statedump" accepted, version
1.0 is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: adding probe ust_baddr_statedump containing 1
events to lazy registration list (in lttng_probe_register() at
lttng-probes.c:216)
libust[17268/17268]: LTT : ltt ring buffer client
"relay-metadata-mmap" init
(in lttng_ring_buffer_metadata_client_init() at
lttng-ring-buffer-metadata-client.h:330)
libust[17268/17268]: LTT : ltt ring buffer client
"relay-overwrite-mmap" init
(in lttng_ring_buffer_client_overwrite_init() at
lttng-ring-buffer-client.h:681)
libust[17268/17268]: LTT : ltt ring buffer client
"relay-overwrite-rt-mmap" init
(in lttng_ring_buffer_client_overwrite_rt_init() at
lttng-ring-buffer-client.h:681)
libust[17268/17268]: LTT : ltt ring buffer client "relay-discard-mmap"
init
(in lttng_ring_buffer_client_discard_init() at
lttng-ring-buffer-client.h:681)
libust[17268/17268]: LTT : ltt ring buffer client
"relay-discard-rt-mmap" init
(in lttng_ring_buffer_client_discard_rt_init() at
lttng-ring-buffer-client.h:681)
libust[17268/17269]: Info: sessiond not accepting connections to
global apps socket (in ust_listener_thread() at lttng-ust-comm.c:1221)
libust[17268/17269]: Waiting for global apps sessiond (in
wait_for_sessiond() at lttng-ust-comm.c:1132)
libust[17268/17270]: Info: sessiond not accepting connections to local
apps socket (in ust_listener_thread() at lttng-ust-comm.c:1221)
libust[17268/17270]: Waiting for local apps sessiond (in
wait_for_sessiond() at lttng-ust-comm.c:1132)
libust[17268/17268]: Provider "lttng_ust_tracef" accepted, version 1.0
is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: just registered probe ust_baddr_statedump
containing 1 events (in lttng_lazy_probe_register() at lttng-probes.c:115)
libust[17268/17268]: adding probe lttng_ust_tracef containing 1 events
to lazy registration list (in lttng_probe_register() at
lttng-probes.c:216)
libust[17268/17268]: Provider "ust_tests_demo3" accepted, version 1.0
is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: just registered probe lttng_ust_tracef containing
1 events (in lttng_lazy_probe_register() at lttng-probes.c:115)
libust[17268/17268]: adding probe ust_tests_demo3 containing 1 events
to lazy registration list (in lttng_probe_register() at
lttng-probes.c:216)
libust[17268/17268]: Provider "ust_tests_demo" accepted, version 1.0
is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: just registered probe ust_tests_demo3 containing
1 events (in lttng_lazy_probe_register() at lttng-probes.c:115)
libust[17268/17268]: adding probe ust_tests_demo containing 2 events
to lazy registration list (in lttng_probe_register() at
lttng-probes.c:216)
libust[17268/17268]: Provider "ust_tests_demo2" accepted, version 1.0
is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: just registered probe ust_tests_demo containing 2
events (in lttng_lazy_probe_register() at lttng-probes.c:115)
libust[17268/17268]: adding probe ust_tests_demo2 containing 1 events
to lazy registration list (in lttng_probe_register() at
lttng-probes.c:216)
liblttng_ust_tracepoint[17268/17268]: just registered a tracepoints
section from 0x804b144 and having 4 tracepoints (in
tracepoint_register_lib() at tracepoint.c:767)
liblttng_ust_tracepoint[17268/17268]: registered tracepoint:
ust_tests_demo:starting (in tracepoint_register_lib() at tracepoint.c:772)
liblttng_ust_tracepoint[17268/17268]: registered tracepoint:
ust_tests_demo:done (in tracepoint_register_lib() at tracepoint.c:772)
liblttng_ust_tracepoint[17268/17268]: registered tracepoint:
ust_tests_demo2:loop (in tracepoint_register_lib() at tracepoint.c:772)
liblttng_ust_tracepoint[17268/17268]: registered tracepoint:
ust_tests_demo3:done (in tracepoint_register_lib() at tracepoint.c:772)
Demo program starting.
Tracing... done.
liblttng_ust_tracepoint[17268/17268]: just unregistered a tracepoints
section from 0x804b144 (in tracepoint_unregister_lib() at
tracepoint.c:797)
libust[17268/17268]: Provider "ust_tests_demo2" accepted, version 1.0
is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: just unregistered probe ust_tests_demo2 (in
lttng_probe_unregister() at lttng-probes.c:245)
libust[17268/17268]: Provider "ust_tests_demo" accepted, version 1.0
is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: just unregistered probe ust_tests_demo (in
lttng_probe_unregister() at lttng-probes.c:245)
libust[17268/17268]: Provider "ust_tests_demo3" accepted, version 1.0
is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: just unregistered probe ust_tests_demo3 (in
lttng_probe_unregister() at lttng-probes.c:245)
libust[17268/17268]: Provider "lttng_ust_tracef" accepted, version 1.0
is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: just unregistered probe lttng_ust_tracef (in
lttng_probe_unregister() at lttng-probes.c:245)
libust[17268/17268]: LTT : ltt ring buffer client
"relay-discard-rt-mmap" exit
(in lttng_ring_buffer_client_discard_rt_exit() at
lttng-ring-buffer-client.h:688)
libust[17268/17268]: LTT : ltt ring buffer client "relay-discard-mmap"
exit
(in lttng_ring_buffer_client_discard_exit() at
lttng-ring-buffer-client.h:688)
libust[17268/17268]: LTT : ltt ring buffer client
"relay-overwrite-rt-mmap" exit
(in lttng_ring_buffer_client_overwrite_rt_exit() at
lttng-ring-buffer-client.h:688)
libust[17268/17268]: LTT : ltt ring buffer client
"relay-overwrite-mmap" exit
(in lttng_ring_buffer_client_overwrite_exit() at
lttng-ring-buffer-client.h:688)
libust[17268/17268]: LTT : ltt ring buffer client
"relay-metadata-mmap" exit
(in lttng_ring_buffer_metadata_client_exit() at
lttng-ring-buffer-metadata-client.h:337)
libust[17268/17268]: Provider "ust_baddr_statedump" accepted, version
1.0 is compatible with LTTng UST provider version 1.0. (in
check_provider_version() at lttng-probes.c:174)
libust[17268/17268]: just unregistered probe ust_baddr_statedump (in
lttng_probe_unregister() at lttng-probes.c:245)
liblttng_ust_tracepoint[17268/17268]: just unregistered a tracepoints
section from 0xb754f780 (in tracepoint_unregister_lib() at
tracepoint.c:797)
row@cobra7:~/lttng_source/lttng-ust/doc/examples/demo$
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--
Jonathan R. Julien
Efficios
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