* [lttng-dev] lttng - ubuntu 11.10 - problem @ 2012-06-15 7:41 somanath sahoo 2012-06-15 8:16 ` Francis Giraldeau 0 siblings, 1 reply; 8+ messages in thread From: somanath sahoo @ 2012-06-15 7:41 UTC (permalink / raw) Hi, As i am new to lttng usage, I have followed the instructions from <https://launchpad.net/~lttng/+archive/ppa> in order to install the lttng tool set in my ubuntu 11.10. After successful installation, i followed the getting started link on lttng.org <http://lttng.org/quickstart> in "root mode". 1. when i am executing the first command - ??? # lttng list -k ??? i am getting the following error ??? " Error: Unable to list kernel events" 2. # lttng create mysession ??? Session mysession created. 3. # lttng enable-event sched_switch,sched_process_fork -k ??? Error: Event sched_switch: Kernel tracer not available (channel channel0, session mysession) ??? Error: Event sched_process_fork: Kernel tracer not available (channel channel0, session mysession) ??? Warning: Some command(s) went wrong? 4. # lttng start ??? Tracing started for session mysession 5. # lttng stop ??? Tracing stopped for session mysession 6.? # lttng destroy ??? Session mysession destroyed at /root ------------ I have checked that lttng-sessiond is running by below command # ps -ef|grep lttn root?????? 535???? 1? 0 Jun14 ???????? 00:00:00 lttng-sessiond somanath? 5359???? 1? 0 Jun14 pts/1??? 00:00:00 lttng-sessiond --sig-parent --quiet root???? 19514 19495? 0 12:44 pts/2??? 00:00:00 grep --color=auto lttn -------------- Could anyone please help me to understand or clarify why kernel tracer is not available when above point (3) / (1) is executed or whether i need to do anything more , please let me know so that i can start using lttng in ubuntu 11.10 successfully. I have googled about this problem, I got to know about this similar problem from one link - http://www.mail-archive.com/lttng-dev at lists.lttng.org/msg00763.html However i executed all this commands under root and explicit lttng-seesiond start, But still the problem is persistant. Any help will be appreciated. Thanks & Regards, Somanath -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.lttng.org/pipermail/lttng-dev/attachments/20120615/87cd04df/attachment-0001.html> ^ permalink raw reply [flat|nested] 8+ messages in thread
* [lttng-dev] lttng - ubuntu 11.10 - problem 2012-06-15 7:41 [lttng-dev] lttng - ubuntu 11.10 - problem somanath sahoo @ 2012-06-15 8:16 ` Francis Giraldeau 2012-06-15 8:23 ` [lttng-dev] Prerequsites for adding perf context Oestman, Fredrik 2012-06-15 13:12 ` [lttng-dev] lttng - ubuntu 11.10 - problem David Goulet 0 siblings, 2 replies; 8+ messages in thread From: Francis Giraldeau @ 2012-06-15 8:16 UTC (permalink / raw) Le 2012-06-15 09:41, somanath sahoo a ?crit : > Hi, > > As i am new to lttng usage, I have followed the instructions from > <https://launchpad.net/~lttng/+archive/ppa> in order to install the > lttng tool set in my ubuntu 11.10. > After successful installation, i followed the getting started link on > lttng.org <http://lttng.org/quickstart> in "root mode". You may verify if kernel modules are loaded correctly. If not, then there may be a problem while the installation. lsmod | grep lttng If not, you may try to load them and see if any error message occurs: sudo modprobe lttng_tracer Francis -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.lttng.org/pipermail/lttng-dev/attachments/20120615/21eab633/attachment.html> -------------- next part -------------- A non-text attachment was scrubbed... Name: smime.p7s Type: application/pkcs7-signature Size: 4476 bytes Desc: Signature cryptographique S/MIME URL: <http://lists.lttng.org/pipermail/lttng-dev/attachments/20120615/21eab633/attachment.bin> ^ permalink raw reply [flat|nested] 8+ messages in thread
* [lttng-dev] Prerequsites for adding perf context 2012-06-15 8:16 ` Francis Giraldeau @ 2012-06-15 8:23 ` Oestman, Fredrik 2012-06-15 15:13 ` Mathieu Desnoyers 2012-06-15 13:12 ` [lttng-dev] lttng - ubuntu 11.10 - problem David Goulet 1 sibling, 1 reply; 8+ messages in thread From: Oestman, Fredrik @ 2012-06-15 8:23 UTC (permalink / raw) Hi, What exactly is needed on a system for # lttng add-context -k -t perf:<something> to work? Does perf have to be installed? I have hw perfevents, but not perf, and get hw perfevents: unable to reserve pmu cheers, Fredrik ?stman ^ permalink raw reply [flat|nested] 8+ messages in thread
* [lttng-dev] Prerequsites for adding perf context 2012-06-15 8:23 ` [lttng-dev] Prerequsites for adding perf context Oestman, Fredrik @ 2012-06-15 15:13 ` Mathieu Desnoyers 0 siblings, 0 replies; 8+ messages in thread From: Mathieu Desnoyers @ 2012-06-15 15:13 UTC (permalink / raw) * Oestman, Fredrik (Fredrik_Oestman at mentor.com) wrote: > Hi, > > > What exactly is needed on a system for > > # lttng add-context -k -t perf:<something> > > to work? Does perf have to be installed? > > I have hw perfevents, but not perf, and get > > hw perfevents: unable to reserve pmu CONFIG_PERF_EVENTS. And what version of kernel do you use ? > > > cheers, > > Fredrik ?stman > > > _______________________________________________ > 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 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [lttng-dev] lttng - ubuntu 11.10 - problem 2012-06-15 8:16 ` Francis Giraldeau 2012-06-15 8:23 ` [lttng-dev] Prerequsites for adding perf context Oestman, Fredrik @ 2012-06-15 13:12 ` David Goulet 2012-06-15 13:51 ` Matthew Khouzam 2012-06-15 15:12 ` Mathieu Desnoyers 1 sibling, 2 replies; 8+ messages in thread From: David Goulet @ 2012-06-15 13:12 UTC (permalink / raw) -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, In order to trace the kernel, you need the LTTng kernel modules available in the package "lttng-modules-dkms". So make sure you have these three packages installed: # sudo apt-get install lttng-tools lttng-modules-dkms babeltrace The error message you got indicates that there is simply no LTTng modules loaded. Please make sure they are loaded and if the problem persist, let us know! Thanks! David On 15/06/12 04:16 AM, Francis Giraldeau wrote: > Le 2012-06-15 09:41, somanath sahoo a ?crit : >> Hi, >> >> As i am new to lttng usage, I have followed the instructions from >> <https://launchpad.net/~lttng/+archive/ppa> in order to install the lttng >> tool set in my ubuntu 11.10. After successful installation, i followed >> the getting started link on lttng.org <http://lttng.org/quickstart> in >> "root mode". > > You may verify if kernel modules are loaded correctly. If not, then there > may be a problem while the installation. > > lsmod | grep lttng > > If not, you may try to load them and see if any error message occurs: > > sudo modprobe lttng_tracer > > Francis > > > > _______________________________________________ lttng-dev mailing list > lttng-dev at lists.lttng.org > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJP2zTIAAoJEELoaioR9I02CVEH/1ripsIVxDQ2JRPNXs0TVWLD 5B/qf3oKTohuKCoKE7Q7ZLyo1A9WN0z9JFouVecEPD7MisdJqYufEXkUNbxHg2+y 9nVT8xF7gToLRBi/qC/hH0JN6AADJmqTVxYAvygv8qWNkLR3PSqguDhE5nM9vrtF LJSEYlYQh0dktkBM9ESm0lrnbZO/AtXxQB4IbCQSwP1tsNmftEdZ24H8DN0/QWl9 niRT6XpBzogNJfQQOPFtJTFxpwKHiMQXdE78UtzzMBPZ9P57Go9jMgP+2FELFZl4 wcu+XMIF2Gx81AajfTkGAjPOczagqKzrgnMCduQaNgCI1hRoWOn7Yu1jTmA6Yxc= =oy1n -----END PGP SIGNATURE----- ^ permalink raw reply [flat|nested] 8+ messages in thread
* [lttng-dev] lttng - ubuntu 11.10 - problem 2012-06-15 13:12 ` [lttng-dev] lttng - ubuntu 11.10 - problem David Goulet @ 2012-06-15 13:51 ` Matthew Khouzam 2012-06-15 15:12 ` Mathieu Desnoyers 1 sibling, 0 replies; 8+ messages in thread From: Matthew Khouzam @ 2012-06-15 13:51 UTC (permalink / raw) After, check that your session daemon is loaded too. the following commands should return +- the following: lsmod |grep lttng lttng_probe_timer 15523 0 lttng_probe_statedump 15004 0 lttng_probe_signal 13567 0 lttng_probe_sched 16688 0 lttng_probe_kvm 16020 0 lttng_probe_irq 13728 0 lttng_probe_block 16630 0 lttng_types 12508 0 lttng_probe_lttng 12828 0 lttng_ring_buffer_metadata_mmap_client 13369 0 lttng_ring_buffer_client_mmap_overwrite 17622 0 lttng_ring_buffer_client_mmap_discard 17622 0 lttng_ring_buffer_metadata_client 13369 0 lttng_ring_buffer_client_overwrite 17622 0 lttng_ring_buffer_client_discard 17622 0 lttng_tracer 240715 14 lttng_probe_timer,lttng_probe_statedump,lttng_probe_signal,lttng_probe_sched,lttng_probe_kvm,lttng_probe_irq,lttng_probe_block,lttng_probe_lttng,lttng_ring_buffer_metadata_mmap_client,lttng_ring_buffer_client_mmap_overwrite,lttng_ring_buffer_client_mmap_discard,lttng_ring_buffer_metadata_client,lttng_ring_buffer_client_overwrite,lttng_ring_buffer_client_discard lttng_kretprobes 13278 1 lttng_tracer lttng_kprobes 12971 1 lttng_tracer lttng_ftrace 13162 1 lttng_tracer lttng_statedump 13903 1 lttng_tracer lttng_lib_ring_buffer 46389 7 lttng_ring_buffer_metadata_mmap_client,lttng_ring_buffer_client_mmap_overwrite,lttng_ring_buffer_client_mmap_discard,lttng_ring_buffer_metadata_client,lttng_ring_buffer_client_overwrite,lttng_ring_buffer_client_discard,lttng_tracer ps -aux |grep "ltt" root 1123 0.0 0.0 47008 728 ? Ssl Jun14 0:00 lttng-sessiond Hope this helps. Matthew On 12-06-15 09:12 AM, David Goulet wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi, > > In order to trace the kernel, you need the LTTng kernel modules available in > the package "lttng-modules-dkms". So make sure you have these three packages > installed: > > # sudo apt-get install lttng-tools lttng-modules-dkms babeltrace > > The error message you got indicates that there is simply no LTTng modules > loaded. Please make sure they are loaded and if the problem persist, let us know! > > Thanks! > David > > On 15/06/12 04:16 AM, Francis Giraldeau wrote: >> Le 2012-06-15 09:41, somanath sahoo a ?crit : >>> Hi, >>> >>> As i am new to lttng usage, I have followed the instructions from >>> <https://launchpad.net/~lttng/+archive/ppa> in order to install the lttng >>> tool set in my ubuntu 11.10. After successful installation, i followed >>> the getting started link on lttng.org <http://lttng.org/quickstart> in >>> "root mode". >> You may verify if kernel modules are loaded correctly. If not, then there >> may be a problem while the installation. >> >> lsmod | grep lttng >> >> If not, you may try to load them and see if any error message occurs: >> >> sudo modprobe lttng_tracer >> >> Francis >> >> >> >> _______________________________________________ lttng-dev mailing list >> lttng-dev at lists.lttng.org >> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.12 (GNU/Linux) > > iQEcBAEBAgAGBQJP2zTIAAoJEELoaioR9I02CVEH/1ripsIVxDQ2JRPNXs0TVWLD > 5B/qf3oKTohuKCoKE7Q7ZLyo1A9WN0z9JFouVecEPD7MisdJqYufEXkUNbxHg2+y > 9nVT8xF7gToLRBi/qC/hH0JN6AADJmqTVxYAvygv8qWNkLR3PSqguDhE5nM9vrtF > LJSEYlYQh0dktkBM9ESm0lrnbZO/AtXxQB4IbCQSwP1tsNmftEdZ24H8DN0/QWl9 > niRT6XpBzogNJfQQOPFtJTFxpwKHiMQXdE78UtzzMBPZ9P57Go9jMgP+2FELFZl4 > wcu+XMIF2Gx81AajfTkGAjPOczagqKzrgnMCduQaNgCI1hRoWOn7Yu1jTmA6Yxc= > =oy1n > -----END PGP SIGNATURE----- > > _______________________________________________ > lttng-dev mailing list > lttng-dev at lists.lttng.org > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev ^ permalink raw reply [flat|nested] 8+ messages in thread
* [lttng-dev] lttng - ubuntu 11.10 - problem 2012-06-15 13:12 ` [lttng-dev] lttng - ubuntu 11.10 - problem David Goulet 2012-06-15 13:51 ` Matthew Khouzam @ 2012-06-15 15:12 ` Mathieu Desnoyers 2012-06-15 15:32 ` Alexandre Montplaisir 1 sibling, 1 reply; 8+ messages in thread From: Mathieu Desnoyers @ 2012-06-15 15:12 UTC (permalink / raw) * David Goulet (david.goulet at polymtl.ca) wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > Hi, > > In order to trace the kernel, you need the LTTng kernel modules available in > the package "lttng-modules-dkms". So make sure you have these three packages > installed: > > # sudo apt-get install lttng-tools lttng-modules-dkms babeltrace hopefully lttng-modules-dkms issues "depmod -a" after the make modules_install ? Mathieu > > The error message you got indicates that there is simply no LTTng modules > loaded. Please make sure they are loaded and if the problem persist, let us know! > > Thanks! > David > > On 15/06/12 04:16 AM, Francis Giraldeau wrote: > > Le 2012-06-15 09:41, somanath sahoo a ?crit : > >> Hi, > >> > >> As i am new to lttng usage, I have followed the instructions from > >> <https://launchpad.net/~lttng/+archive/ppa> in order to install the lttng > >> tool set in my ubuntu 11.10. After successful installation, i followed > >> the getting started link on lttng.org <http://lttng.org/quickstart> in > >> "root mode". > > > > You may verify if kernel modules are loaded correctly. If not, then there > > may be a problem while the installation. > > > > lsmod | grep lttng > > > > If not, you may try to load them and see if any error message occurs: > > > > sudo modprobe lttng_tracer > > > > Francis > > > > > > > > _______________________________________________ lttng-dev mailing list > > lttng-dev at lists.lttng.org > > http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v1.4.12 (GNU/Linux) > > iQEcBAEBAgAGBQJP2zTIAAoJEELoaioR9I02CVEH/1ripsIVxDQ2JRPNXs0TVWLD > 5B/qf3oKTohuKCoKE7Q7ZLyo1A9WN0z9JFouVecEPD7MisdJqYufEXkUNbxHg2+y > 9nVT8xF7gToLRBi/qC/hH0JN6AADJmqTVxYAvygv8qWNkLR3PSqguDhE5nM9vrtF > LJSEYlYQh0dktkBM9ESm0lrnbZO/AtXxQB4IbCQSwP1tsNmftEdZ24H8DN0/QWl9 > niRT6XpBzogNJfQQOPFtJTFxpwKHiMQXdE78UtzzMBPZ9P57Go9jMgP+2FELFZl4 > wcu+XMIF2Gx81AajfTkGAjPOczagqKzrgnMCduQaNgCI1hRoWOn7Yu1jTmA6Yxc= > =oy1n > -----END PGP SIGNATURE----- > > _______________________________________________ > 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 ^ permalink raw reply [flat|nested] 8+ messages in thread
* [lttng-dev] lttng - ubuntu 11.10 - problem 2012-06-15 15:12 ` Mathieu Desnoyers @ 2012-06-15 15:32 ` Alexandre Montplaisir 0 siblings, 0 replies; 8+ messages in thread From: Alexandre Montplaisir @ 2012-06-15 15:32 UTC (permalink / raw) On 12-06-15 11:12 AM, Mathieu Desnoyers wrote: > * David Goulet (david.goulet at polymtl.ca) wrote: > Hi, > > In order to trace the kernel, you need the LTTng kernel modules > available in > the package "lttng-modules-dkms". So make sure you have these three > packages > installed: > > # sudo apt-get install lttng-tools lttng-modules-dkms babeltrace > > > hopefully lttng-modules-dkms issues "depmod -a" after the make > > modules_install ? Yeah it does, it runs it once at the end after all modules have been compiled. In Somanath's original email, there are two sessiond running, one as root and one as the user. I'm curious as to how the user one got started, perhaps the commands weren't executed as root somehow? Cheers, -- Alexandre Montplaisir DORSAL lab, ?cole Polytechnique de Montr?al ^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2012-06-15 15:32 UTC | newest] Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2012-06-15 7:41 [lttng-dev] lttng - ubuntu 11.10 - problem somanath sahoo 2012-06-15 8:16 ` Francis Giraldeau 2012-06-15 8:23 ` [lttng-dev] Prerequsites for adding perf context Oestman, Fredrik 2012-06-15 15:13 ` Mathieu Desnoyers 2012-06-15 13:12 ` [lttng-dev] lttng - ubuntu 11.10 - problem David Goulet 2012-06-15 13:51 ` Matthew Khouzam 2012-06-15 15:12 ` Mathieu Desnoyers 2012-06-15 15:32 ` Alexandre Montplaisir
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