[lttng-dev] make a trace_event in a modul (driver)
Klaus Dannecker
klaus.dannecker at gmx.de
Fri Nov 22 05:54:22 EST 2013
Am 21.11.2013 18:41, schrieb Jérémie Galarneau:
> On Thu, Nov 21, 2013 at 11:42 AM, Klaus Dannecker
> <klaus.dannecker at gmx.de> wrote:
>> Am 21.11.2013 16:49, schrieb Jérémie Galarneau:
>>
>>> On Thu, Nov 21, 2013 at 4:48 AM, Klaus Dannecker <klaus.dannecker at gmx.de>
>>> wrote:
>>>> Hi,
>>>>
>>>> Nobody can help me?
>>>>
>>>> now i have ubuntu 13.10 installed in a vmware.
>>>> but i have the same error!
>>>>
>>>> s$ sudo make modules_install
>>>> make -C /lib/modules/3.11.0-12-generic/build
>>>> M=/home/klaus/lttng_src/lttng-modules modules_install
>>>> make[1]: Entering directory `/usr/src/linux-headers-3.11.0-12-generic'
>>>> INSTALL
>>>> /home/klaus/lttng_src/lttng-modules/lib/lttng-lib-ring-buffer.ko
>>>>
>>>> Can't read private key
>>> Ubuntu now ships with module signing enabled by default.
>>> Does the installation fail, or is it just a warning?
>> i don't know
>>
>>>> ....
>>>> lsmod | grep lttng
>>>> -> no module found
>>>>
>>> The modules will not be automatically loaded after being built and
>>> installed. You have to launch lttng-sessiond (as root) for that. What
>>> is the output of the following commands?
>>>
>>> make
>>> sudo make modules_install
>>> sudo depmod -a
>>> sudo lttng-sessiond &
>>> lsmod | grep lttng
>> klaus at ubuntu:~/lttng_src/lttng-modules$ make
>> make -C /lib/modules/3.11.0-12-generic/build
>> M=/home/klaus/lttng_src/lttng-modules modules
>>
>> make[1]: Entering directory `/usr/src/linux-headers-3.11.0-12-generic'
>> /home/klaus/lttng_src/lttng-modules/probes/Makefile:30: File
>> /usr/src/linux-headers-3.11.0-12-generic/virt/kvm/iodev.h not found. Probe
>> "kvm" x86-specific is disabled. Use full kernel source tree to enable it.
>> /home/klaus/lttng_src/lttng-modules/probes/Makefile:81: Files
>> /usr/src/linux-headers-3.11.0-12-generic/fs/ext3/*.h not found. Probe "ext3"
>> is disabled. Use full kernel source tree to enable it.
>> /home/klaus/lttng_src/lttng-modules/probes/Makefile:142: Files
>> /usr/src/linux-headers-3.11.0-12-generic/fs/btrfs/*.h not found. Probe
>> "btrfs" is disabled. Use full kernel source tree to enable it.
>> /home/klaus/lttng_src/lttng-modules/probes/Makefile:158: Files
>> /usr/src/linux-headers-3.11.0-12-generic/fs/ext4/*.h not found. Probe "ext4"
>> is disabled. Use full kernel source tree to enable it.
>> Building modules, stage 2.
>> MODPOST 44 modules
>> make[1]: Leaving directory `/usr/src/linux-headers-3.11.0-12-generic'
>>
>> klaus at ubuntu:~/lttng_src/lttng-modules$ sudo make modules_install
>>
>> make -C /lib/modules/3.11.0-12-generic/build
>> M=/home/klaus/lttng_src/lttng-modules modules_install
>> make[1]: Entering directory `/usr/src/linux-headers-3.11.0-12-generic'
>> INSTALL /home/klaus/lttng_src/lttng-modules/lib/lttng-lib-ring-buffer.ko
>> Can't read private key
>> INSTALL
>> /home/klaus/lttng_src/lttng-modules/lttng-ring-buffer-client-discard.ko
>>
>> Can't read private key
>> ...
>> DEPMOD 3.11.0-12-generic
>> make[1]: Leaving directory `/usr/src/linux-headers-3.11.0-12-generic'
>> klaus at ubuntu:~/lttng_src/lttng-modules$
>>
>> klaus at ubuntu:~/lttng_src/lttng-modules$ sudo depmod -a
>> klaus at ubuntu:~/lttng_src/lttng-modules$
>> klaus at ubuntu:~/lttng_src/lttng-modules$ sudo lttng-sessiond &
>> [1] 23486
>> klaus at ubuntu:~/lttng_src/lttng-modules$ lsmod | grep lttng
>>
>> [1]+ Stopped sudo lttng-sessiond
>> klaus at ubuntu:~/lttng_src/lttng-modules$
>>
> Hard to say why lttng-sessiond received SIGSTOP...
>
> Could you try running the session daemon in verbose mode in another terminal?
> sudo lttng-sessiond -vvv
klaus at ubuntu:~$ sudo lttng-sessiond -vvv
[sudo] password for klaus:
DEBUG3 [23710/23710]: Creating LTTng run directory: /var/run/lttng (in
create_lttng_rundir() at main.c:4267)
DEBUG2 [23710/23710]: Kernel consumer err path:
/var/run/lttng/kconsumerd/error (in main() at main.c:4696)
DEBUG2 [23710/23710]: Kernel consumer cmd path:
/var/run/lttng/kconsumerd/command (in main() at main.c:4698)
DEBUG1 [23710/23710]: Client socket path
/var/run/lttng/client-lttng-sessiond (in main() at main.c:4751)
DEBUG1 [23710/23710]: Application socket path
/var/run/lttng/lttng-ust-sock-5 (in main() at main.c:4752)
DEBUG1 [23710/23710]: Application wait path /lttng-ust-wait-5 (in main()
at main.c:4753)
DEBUG1 [23710/23710]: LTTng run directory path: /var/run/lttng (in
main() at main.c:4754)
DEBUG2 [23710/23710]: UST consumer 32 bits err path:
/var/run/lttng/ustconsumerd32/error (in main() at main.c:4763)
DEBUG2 [23710/23710]: UST consumer 32 bits cmd path:
/var/run/lttng/ustconsumerd32/command (in main() at main.c:4765)
DEBUG2 [23710/23710]: UST consumer 64 bits err path:
/var/run/lttng/ustconsumerd64/error (in main() at main.c:4774)
DEBUG2 [23710/23710]: UST consumer 64 bits cmd path:
/var/run/lttng/ustconsumerd64/command (in main() at main.c:4776)
DEBUG3 [23710/23710]: Created hashtable size 4 at 0x982c080 of type 1
(in lttng_ht_new() at hashtable.c:127)
DEBUG3 [23710/23710]: Created hashtable size 4 at 0x982c270 of type 1
(in lttng_ht_new() at hashtable.c:127)
DEBUG3 [23710/23710]: Created hashtable size 4 at 0x982c498 of type 1
(in lttng_ht_new() at hashtable.c:127)
DEBUG3 [23710/23710]: Created hashtable size 4 at 0x982c6c0 of type 1
(in lttng_ht_new() at hashtable.c:127)
DEBUG2 [23710/23710]: Creating consumer directory:
/var/run/lttng/kconsumerd (in set_consumer_sockets() at main.c:4309)
DEBUG1 [23710/23710]: Modprobe successfully lttng-tracer (in
modprobe_lttng_control() at modprobe.c:192)
DEBUG2 [23710/23710]: Kernel tracer version validated (major version 2)
(in kernel_validate_version() at kernel.c:700)
DEBUG1 [23710/23710]: Modprobe successfully lttng-ftrace (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-kprobes (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-kretprobes (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-lib-ring-buffer (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully
lttng-ring-buffer-client-discard (in modprobe_lttng_data() at
modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully
lttng-ring-buffer-client-overwrite (in modprobe_lttng_data() at
modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully
lttng-ring-buffer-metadata-client (in modprobe_lttng_data() at
modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully
lttng-ring-buffer-client-mmap-discard (in modprobe_lttng_data() at
modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully
lttng-ring-buffer-client-mmap-overwrite (in modprobe_lttng_data() at
modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully
lttng-ring-buffer-metadata-mmap-client (in modprobe_lttng_data() at
modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-types (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-asoc (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-block (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-btrfs (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-compaction (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-ext3 (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-ext4 (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-gpio (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-irq (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-jbd (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-jbd2 (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-kmem (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-kvm (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-kvm-x86 (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-kvm-x86-mmu (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-lock (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-module (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-napi (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-net (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-power (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-printk (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-random (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-rcu (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-regmap (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-regulator (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-rpm (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-sched (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-scsi (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-signal (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-skb (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-sock (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-statedump (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-sunrpc (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-timer (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-udp (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-vmscan (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-workqueue (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Modprobe successfully lttng-probe-writeback (in
modprobe_lttng_data() at modprobe.c:228)
DEBUG1 [23710/23710]: Kernel tracer fd 6 (in init_kernel_tracer() at
main.c:2364)
DEBUG2 [23710/23710]: Creating consumer directory:
/var/run/lttng/ustconsumerd64 (in set_consumer_sockets() at main.c:4309)
DEBUG2 [23710/23710]: Creating consumer directory:
/var/run/lttng/ustconsumerd32 (in set_consumer_sockets() at main.c:4309)
DEBUG3 [23710/23710]: Session daemon client socket 9 and application
socket 10 created (in init_daemon_socket() at main.c:4175)
DEBUG1 [23710/23710]: All permissions are set (in set_permissions() at
main.c:4255)
DEBUG3 [23710/23710]: Created hashtable size 4 at 0x982e160 of type 2
(in lttng_ht_new() at hashtable.c:127)
DEBUG3 [23710/23710]: Global buffer per UID registry initialized (in
buffer_reg_init_uid_registry() at buffer-registry.c:99)
DEBUG3 [23710/23710]: Created hashtable size 4 at 0x982e388 of type 2
(in lttng_ht_new() at hashtable.c:127)
DEBUG3 [23710/23710]: Global buffer per PID registry initialized (in
buffer_reg_init_pid_registry() at buffer-registry.c:220)
DEBUG1 [23710/23710]: epoll set max size is 327338 (in
compat_epoll_set_max_size() at compat-epoll.c:280)
DEBUG1 [23710/23710]: Command subsystem initialized (in cmd_init() at
cmd.c:3056)
DEBUG1 [23710/23710]: Pid 23710 written in file
/var/run/lttng/lttng-sessiond.pid (in utils_create_pid_file() at
utils.c:437)
DEBUG1 [23710/23710]: Pid 5345 written in file /var/run/lttng/jul.port
(in utils_create_pid_file() at utils.c:437)
DEBUG1 [23710/23710]: TCP inet operation timeout set to 216 sec (in
lttcomm_inet_init() at inet.c:529)
DEBUG1 [23710/23710]: Health check time delta in seconds set to 236 (in
health_init() at health.c:73)
DEBUG1 [23710/23820]: [thread] Manage health check started (in
thread_manage_health() at main.c:3511)
DEBUG1 [23710/23824]: [thread] Manage application started (in
thread_manage_apps() at main.c:1256)
DEBUG1 [23710/23823]: [thread] Manage application registration started
(in thread_registration_apps() at main.c:1766)
DEBUG1 [23710/23822]: [thread] Dispatch UST command started (in
thread_dispatch_ust_registration() at main.c:1543)
DEBUG1 [23710/23821]: [thread] Manage client started (in
thread_manage_clients() at main.c:3695)
DEBUG1 [23710/23821]: Accepting client command ... (in
thread_manage_clients() at main.c:3747)
DEBUG1 [23710/23819]: [ht-thread] startup. (in thread_ht_cleanup() at
ht-cleanup.c:35)
DEBUG3 [23710/23819]: [ht-thread] Polling on 2 fds. (in
thread_ht_cleanup() at ht-cleanup.c:59)
DEBUG1 [23710/23825]: [ust-thread] Manage application notify command (in
ust_thread_manage_notify() at ust-thread.c:38)
DEBUG1 [23710/23826]: [jul-thread] Manage JUL application registration.
(in jul_thread_manage_registration() at jul-thread.c:250)
DEBUG3 [23710/23826]: URI string: tcp://localhost (in uri_parse() at
uri.c:291)
DEBUG1 [23710/23824]: Apps thread polling on 2 fds (in
thread_manage_apps() at main.c:1286)
DEBUG1 [23710/23822]: Futex n to 1 prepare done (in futex_nto1_prepare()
at futex.c:75)
DEBUG1 [23710/23823]: Notifying applications of session daemon state: 1
(in notify_ust_apps() at main.c:593)
DEBUG3 [23710/23825]: [ust-thread] Manage notify polling on 2 fds (in
ust_thread_manage_notify() at ust-thread.c:63)
DEBUG1 [23710/23820]: Health check ready (in thread_manage_health() at
main.c:3574)
DEBUG1 [23710/23827]: [thread] Thread manage kernel started (in
thread_manage_kernel() at main.c:794)
DEBUG1 [23710/23827]: Updating kernel poll set (in update_kernel_poll()
at main.c:654)
DEBUG1 [23710/23827]: Thread kernel polling on 2 fds (in
thread_manage_kernel() at main.c:839)
DEBUG1 [23710/23822]: Woken up but nothing in the UST command queue (in
thread_dispatch_ust_registration() at main.c:1566)
DEBUG2 [23710/23826]: IP address resolved to 127.0.0.1 (in
set_ip_address() at uri.c:132)
DEBUG3 [23710/23826]: URI dtype: 1, proto: 1, host: localhost, subdir: ,
ctrl: 0, data: 0 (in uri_parse() at uri.c:505)
PERROR [23710/23826]: bind inet: Address already in use (in
lttcomm_bind_inet_sock() at inet.c:109)
DEBUG1 [23710/23826]: [jul-thread] is cleaning up and stopping. (in
jul_thread_manage_registration() at jul-thread.c:356)
DEBUG3 [23710/23826]: [jul-thread] Cleaning JUL apps ht (in
clean_jul_apps_ht() at jul-thread.c:100)
DEBUG1 [23710/23823]: Got the wait shm fd 26 (in get_wait_shm() at
shm.c:115)
DEBUG1 [23710/23823]: Futex wait update active 1 (in futex_wait_update()
at futex.c:63)
DEBUG1 [23710/23823]: Accepting application registration (in
thread_registration_apps() at main.c:1803)
another terminal:
klaus at ubuntu:~/lttng_src/lttng-modules$ lsmod | grep lttng
lttng_probe_writeback 22927 0
lttng_probe_workqueue 13726 0
lttng_probe_vmscan 17138 0
....
but:
klaus at ubuntu:~/lttng_src/lttng-modules$ lttng list -k
Error: Unable to list kernel events: Tracing the kernel requires a root
lttng-sessiond daemon, as well as "tracing" group membership or root
user ID for the lttng client.
Error: Command error
klaus at ubuntu:~/lttng_src/lttng-modules$
then stop the command sudo lttng-sessiond -vvv with "STRG+C"
^CDEBUG1 [23710/23710]: SIGINT caught (in sighandler() at main.c:4374)
DEBUG1 [23710/23710]: Terminating all threads (in stop_threads() at
main.c:370)
DEBUG1 [23710/23710]: Futex n to 1 wake done (in futex_nto1_wake() at
futex.c:104)
DEBUG1 [23710/23821]: Clean command context structure (in
clean_command_ctx() at main.c:573)
...
klaus at ubuntu:~/lttng_src/lttng-modules$ lsmod | grep lttng
klaus at ubuntu:~/lttng_src/lttng-modules$
Regards,
Klaus
> This should load the modules or at least log an error if it fails to do so.
>
>> Thanks for your help!
>>
>> Regards,
>> Klaus
>>
>>> Regards,
>>> Jérémie
>>>
>>>> Thanks!
>>>>
>>>> Am 13.11.2013 18:37, schrieb Klaus Dannecker:
>>>>
>>>>
>>>> Am 09.11.2013 09:33, schrieb Klaus Dannecker:
>>>>
>>>> Hi,
>>>> I want to write a driver with trace events.
>>>> In the first step i compile the example trace-events-sample.c with the
>>>> makefile:
>>>>
>>>> ifneq ($(KERNELRELEASE),)
>>>> obj-m := modul_trace-events-sample.o
>>>> modul_trace-events-sample-y := trace-events-sample.o
>>>> ccflags-y := -I$(src)
>>>> else
>>>> KDIR ?= /lib/modules/`uname -r`/build
>>>> default:
>>>> $(MAKE) -C $(KDIR) M=$$PWD
>>>> endif
>>>>
>>>> now i get the modul_trace-events-sample.ko File.
>>>> now:
>>>> insmod modul_trace-events-sample.ko
>>>> lttng create
>>>> lttng enable-event -k -a
>>>> lttng start
>>>> ...wait...
>>>> lttng stop
>>>> lttng destroy
>>>>
>>>> now i look the result in the eclise viewer, but i found event
>>>> "trace_foo_bar" not in the session!
>>>> what am I doing wrong?
>>>>
>>>> I use ubuntu 13.04 in a vmware
>>>>
>>>> Thanks
>>>>
>>>> _______________________________________________
>>>>
>>>> Hi,
>>>>
>>>> now i found a answer:
>>>> http://lists.lttng.org/pipermail/lttng-dev/2013-October/021540.html
>>>> now i download the lttng-module and compiled it.
>>>>
>>>> $ git clone git://git.lttng.org/lttng-modules.git
>>>> $ cd lttng-tools
>>>> $ make
>>>> $ sudo make modules_install
>>>> here I get error
>>>> INSTALL
>>>> /mnt/hgfs/shared_Folder/lttng-modules/lib/lttng-lib-ring-buffer.ko
>>>> Can't read private key
>>>> ...
>>>> what does that mean?
>>>> what should I do?
>>>>
>>>> please help me!
>>>>
>>>> another question:
>>>> when i create a trace events in module_a,
>>>> can i use it in module_b?
>>>> if yes, what should I do?
>>>>
>>>> thanks Klaus
>>>>
>>>>
>>>> _______________________________________________
>>>> lttng-dev mailing list
>>>> lttng-dev at lists.lttng.org
>>>> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> lttng-dev mailing list
>>>> lttng-dev at lists.lttng.org
>>>> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>>>>
>>>
>
>
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