A first glance through the log reveals these possibly significant entries:
DEBUG1 [15860/15996]: Sending response (size: 16, retcode: Unknown error code)
(in thread_manage_clients() at main.c:3803)
And later
PERROR [16322/16322]: sendmsg: Broken pipe (in lttcomm_send_unix_sock() at
Yes, with that LD_PRELOAD sample able to run.
root@/tmp/lttng-build-root/bin # ./lttng create app
Session app created.
Traces will be written in /root/lttng-traces/app-20131206-174935
root@/tmp/lttng-build-root/bin # dmesg
root@/tmp/lttng-build-root/bin # ./lttng enable-event -u -a
All UST events
The Lttng version installed is Dominus Vobiscum
The lttng tools: 2.3.1
Lttng-ust 2.3.1
Lttng modules 2.3.4
And The session running is
28664 root 0:00 ./lttng-sessiond -vvv
--consumerd64-path=/tmp/lttng-build-root/lib/lttng/libexec/lttng-consumerd
29027 root 0:00 lttng-consumerd
Hi !,
Thanks for your mail.
I'm also able to run the easy-ust and generate the traces successfully if I
create and run from an user not as root user.
But the kernel traces are generated fine for even root user but for ust it
runs fine only with non-root user in my case.
And the behavior is
On 07 Dec (06:16:14), Manikandan Govindaswamy wrote:
Please find the log for the --verbose-consumer attached.
With the log file you provided, *no* application registered to the
session daemon meaning probably that lttng-ust is either not called or
not linked at all.
By adding this in front, you
De : Manikandan Govindaswamy [mailto:ma...@vestas.com]
Envoyé : 6 décembre 2013 04:49
Now I'm trying with ust examples : demo and easy-ust and I'm facing the same
problem of no tracing is generated.
Please find the sessiond log and the execution sequence as below for sample.
I tried the
If:
$ gcc -o sample sample.o tp.o -ldl -llttng-ust
Fails with error: cannot find -llttng-ust, then do this instead:
$ gcc -o sample sample.o tp.o -L/usr/local/lib -ldl -llttng-ust
Daniel U. Thibault
Protection des systèmes et contremesures (PSC) | Systems Protection
Countermeasures (SPC)
As I'm using the custom image on x86 machine, i've kept the lib in
/tmp/lttng-build-root/lib folder and this sample able to see the library as
well.
And the same way I able to create the trace files for kernel but not for ust.
There were no dmesg as well.
[...]
root@/tmp # ldd sample
Yes, with that LD_PRELOAD sample able to run.
root@/tmp/lttng-build-root/bin # ./lttng create app
Session app created.
Traces will be written in /root/lttng-traces/app-20131206-174935
root@/tmp/lttng-build-root/bin # dmesg
root@/tmp/lttng-build-root/bin # ./lttng enable-event -u -a
All UST
Interesting. I've managed to sort-of-reproduce the problem. If I run
(from a user account which is NOT a tracing group member):
[...]
Then lttng correctly creates the trace folder in
/home/username/lttng-traces/a-... when sample is run, but it remains empty.
No ust sub-folder,
Could you launch the session daemon in verbose mode and post the logs?
lttng-sessiond -vvv --verbose-consumer
On Fri, Dec 6, 2013 at 10:51 AM, Manikandan Govindaswamy
ma...@vestas.com wrote:
Yes, with that LD_PRELOAD sample able to run.
root@/tmp/lttng-build-root/bin # ./lttng create app
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