From: tom.deneau@amd.com (Deneau, Tom)
Subject: [lttng-dev] Error: Kernel create channel failed
Date: Tue, 30 May 2017 14:15:47 +0000 [thread overview]
Message-ID: <CY4PR12MB1912F9F050D1DF167B92DE089BF00@CY4PR12MB1912.namprd12.prod.outlook.com> (raw)
I seem to have gotten my lttng into a state where kernel tracing does not work.
I have tried uninstalling and reinstalling packages with no luck and also building from source.
Any suggestions welcome.
My distro is Ubuntu 16.04 but the kernel is 4.10.0-20-generic.
I have installed 2.9 using
apt install linux-tools-generic dkms
apt-add-repository ppa:lttng/stable-2.9
apt-get update
apt install -y lttng-tools liblttng-ust-dev liblttng-ust-agent-java python3-lttngust lttng-modules-dkms
wget http://ftp.us.debian.org/debian/pool/main/l/lttng-modules/lttng-modules-dkms_2.9.1-1_all.deb
dpkg -i lttng-modules-dkms_2.9.1-1_all.deb
apt install -y babeltrace python3-babeltrace
After lttng create test, I then try
# lttng -vvv enable-channel k -k --num-subbuf 64 --subbuf-size 512k
DEBUG1 - 08:27:54.415995 [13972/13972]: Channel subbuf num set to 64 (in cmd_enable_channels() at commands/enable_channels.c:420)
DEBUG1 - 08:27:54.416045 [13972/13972]: Channel subbuf size set to 524288 (in cmd_enable_channels() at commands/enable_channels.c:384)
DEBUG2 - 08:27:54.416080 [13972/13972]: Config file path found: /root (in _get_session_name() at utils.c:63)
DEBUG1 - 08:27:54.416087 [13972/13972]: Session name found: test (in _get_session_name() at utils.c:64)
DEBUG1 - 08:27:54.416099 [13972/13972]: Enabling channel k (in enable_channel() at commands/enable_channels.c:225)
DEBUG1 - 08:27:54.416129 [13972/13972]: LSM cmd type : 5 (in send_session_msg() at lttng-ctl.c:135)
Error: Channel k: Kernel create channel failed (session test)
Error: Command error
DEBUG1 - 08:27:54.416479 [13972/13972]: Clean exit (in clean_exit() at lttng.c:149)
next reply other threads:[~2017-05-30 14:15 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-30 14:15 Deneau, Tom [this message]
2017-05-31 18:30 ` Jonathan Rajotte-Julien
2017-05-31 23:18 ` Deneau, Tom
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