Am 18.12.2013 17:27, schrieb Francis Giraldeau:
Le 2013-12-16 13:35, Klaus Dannecker a écrit :
Hi Francis,
sample.h -> ../instumentation/events/lttng-modul
lttng-trace-events-sample.c -> ../addons/
and two various example
trace-events-sample.c ; trace-events-sample.h
trace-events-sample1.c with the
the examples are stored in the folder ../addons/
in the make-File i add
obj-m += lttng-trace-events-sample.o
obj-m += trace-events-sample.o
obj-m += trace-events-sample1.o
where is the error?
what sample is the best?
can i use the same trace-event in all sample?
First, there were two definition with the same name, that is you may
end-up enabling one, but calling the other. It's better to use unique
names.
Also, the module lttng-modsign must be loaded first, otherwise the
tracepoint won't generate data.
It's better to put the probe code in it's own module.
You should put '\n' at the end of printk() (and printf() in general) to
force a flush, otherwise the string accumulates, and is flushed later.
I did put your code into addons-klaus branch on github. Grab the source,
then:
make
sudo make modules_install
sudo depmod -a
sudo lttng-sessiond -v
// make sure normal modules are loaded
cd addons
./control-addons.sh load
// make sure sample modules are loaded
// verify that event-sample thread is running (pgrep -l event-sample)
lttng create
lttng enable-event -k foo1_bar
lttng start
// check dmesg for event-sample output
lttng stop
lttng view
I tested it and it worked for me.
https://github.com/giraldeau/lttng-modules/tree/addons-klaus
ok, so i downloadet the
https://github.com/giraldeau/lttng-modules/tree/addons-klaus
but i can't compile this.
klaus@ubuntu:~/lttng_src/lttng-modules-addons-klaus$ make
..
CC [M]
/home/klaus/lttng_src/lttng-modules-addons-klaus/probes/lttng-probe-user.o
CC [M]
/home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-context-perf-counters.o
LD [M] /home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-tracer.o
MD5SUM /home/klaus/lttng_src/lttng-modules-addons-klaus/.System.map.md5
md5sum: /boot/System.map-3.8.0-29-generic: Permission denied
make[2]: ***
[/home/klaus/lttng_src/lttng-modules-addons-klaus/.System.map.md5] Error 1
make[1]: *** [_module_/home/klaus/lttng_src/lttng-modules-addons-klaus]
Error 2
make[1]: Leaving directory `/usr/src/linux-headers-3.8.0-29-generic'
make: *** [default] Error 2
klaus@ubuntu:~/lttng_src/lttng-modules-addons-klaus$
when i use sudo make, i become another error:
make -C /lib/modules/3.8.0-29-generic/build
M=/home/klaus/lttng_src/lttng-modules-addons-klaus modules
make[1]: Entering directory `/usr/src/linux-headers-3.8.0-29-generic'
AS [M]
/home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-certificate.o
/home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-certificate.o:
Assembler messages:
/home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-certificate.o:
Warning: end of file in comment; newline inserted
/home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-certificate.o:1:
Error: junk at end of line, first unrecognized character valued 0x7f
/home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-certificate.o:1:
Error: junk at end of line, first unrecognized character valued 0x1
/home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-certificate.o:1:
Error: junk at end of line, first unrecognized character valued 0x3
...
/home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-certificate.S:13:
Error: file not found: signing_key.x509
make[2]: ***
[/home/klaus/lttng_src/lttng-modules-addons-klaus/lttng-certificate.o]
Error 1
make[1]: *** [_module_/home/klaus/lttng_src/lttng-modules-addons-klaus]
Error 2
make[1]: Leaving directory `/usr/src/linux-headers-3.8.0-29-generic'
make: *** [default] Error 2
but the File signing_key.x509 exist!
I'm so sorry that I always get errors!
Cheers,
Klaus
Cheers,
Francis
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