From mboxrd@z Thu Jan 1 00:00:00 1970 From: mathieu.desnoyers@efficios.com (Mathieu Desnoyers) Date: Wed, 10 Aug 2016 15:11:09 +0000 (UTC) Subject: [lttng-dev] Lttng not producing trace files In-Reply-To: <1af4c52ad1c24d9d98c4d021bc369b64@ROCXCH14.cs.myharris.net> References: <1af4c52ad1c24d9d98c4d021bc369b64@ROCXCH14.cs.myharris.net> Message-ID: <1157074173.7177.1470841869819.JavaMail.zimbra@efficios.com> ----- On Aug 9, 2016, at 12:24 PM, Corbin, Craig wrote: > I am running lttng on an arm board. I am having an issue when tracing the > kernel, i don't have any trace file. I do notice i have a bunch of Unknown > symbol outputs when spawning the session deamon. But if i run lttng create > again i don't see these messages pop up. But the main issue is that if i do > #lttng create > #lttng enable-event --kernel --syscall --all > #lttng start > #lttng stop > I don't have anything in my trace session folder. I expected to see the trace > file being dumped here after lttng stop. > Below is what i get the first time i run lttng create > # lttng create > Spawning a session daemon > [ 74.874182] lttng_ring_buffer_client_discard: Unknown symbol > lib_ring_buffer_release_read (err 0) > [ 74.883131] lttng_ring_buffer_client_discard: Unknown symbol > channel_get_ring_buffer (err 0) > [ 74.891602] lttng_ring_buffer_client_discard: Unknown symbol > lttng_transport_unregister (err 0) > [ 74.900336] lttng_ring_buffer_client_discard: Unknown symbol channel_destroy > (err 0) > [ 74.908116] lttng_ring_buffer_client_discard: Unknown symbol > _lib_ring_buffer_memset (err 0) > [ 74.916584] lttng_ring_buffer_client_discard: Unknown symbol > _lib_ring_buffer_write (err 0) > [ 74.924967] lttng_ring_buffer_client_discard: Unknown symbol > lib_ring_buffer_offset_address (err 0) > [ 74.934049] lttng_ring_buffer_client_discard: Unknown symbol > _lib_ring_buffer_strcpy_from_user_inatomic (err 0) > [ 74.944188] lttng_ring_buffer_client_discard: Unknown symbol > lib_ring_buffer_reserve_slow (err 0) > [ 74.953104] lttng_ring_buffer_client_discard: Unknown symbol lttng_last_tsc > (err 0) > [ 74.960790] lttng_ring_buffer_client_discard: Unknown symbol > _lib_ring_buffer_strcpy (err 0) > [ 74.969261] lttng_ring_buffer_client_discard: Unknown symbol > lib_ring_buffer_read_offset_address (err 0) > [ 74.978773] lttng_ring_buffer_client_discard: Unknown symbol > _lib_ring_buffer_copy_from_user_inatomic (err 0) > [ 74.988724] lttng_ring_buffer_client_discard: Unknown symbol > lib_ring_buffer_nesting (err 0) > [ 74.997202] lttng_ring_buffer_client_discard: Unknown symbol > lttng_transport_register (err 0) > [ 75.005761] lttng_ring_buffer_client_discard: Unknown symbol lttng_trace_clock > (err 0) > [ 75.013709] lttng_ring_buffer_client_discard: Unknown symbol > lib_ring_buffer_open_read (err 0) > [ 75.022343] lttng_ring_buffer_client_discard: Unknown symbol channel_create > (err 0) The warnings above should not be there. Make sure your kernel meets the lttng-modules README file requirements, and that you issued depmod -a. Perhaps try to rebuild/re-install lttng-modules. Thanks, Mathieu > Session auto-19700101-000114 created. > Traces will be written in //lttng-traces/auto-19700101-000114 > _______________________________________________ > lttng-dev mailing list > lttng-dev at lists.lttng.org > https://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev -- Mathieu Desnoyers EfficiOS Inc. http://www.efficios.com -------------- next part -------------- An HTML attachment was scrubbed... URL: