我是lttng的新手，所以我尝试遵循lttng.org的“快速入门”教程。
我已经安装了LTTng Stable 2.10 PPA（lttng-tools，lttng-modules-dkms，liblttng-ust-dev）。 起初，我面临内核跟踪的问题：
~/lttng_train$ sudo lttng create my
Session my created.
Traces will be written in /home/szymon/lttng-traces/my-20181130-222008
~/lttng_train$ sudo lttng list --kernel
Error: Unable to list kernel events: Kernel tracer not available
Error: Command error
有什么想法吗？感谢您的支持！
其他信息：
~/lttng_train$ dpkg -l | grep lttng
ii liblttng-ctl0:amd64 2.10.5-1~ubuntu16.04.1 amd64 LTTng control and utility library
ii liblttng-ust-ctl4:amd64 2.10.2-1~ubuntu16.04.1 amd64 LTTng 2.0 Userspace Tracer (trace control library)
ii liblttng-ust-dev:amd64 2.10.2-1~ubuntu16.04.1 amd64 LTTng 2.0 Userspace Tracer (development files)
ii liblttng-ust-python-agent0:amd64 2.10.2-1~ubuntu16.04.1 amd64 LTTng 2.0 Userspace Tracer (Python agent native library)
ii liblttng-ust0:amd64 2.10.2-1~ubuntu16.04.1 amd64 LTTng 2.0 Userspace Tracer (tracing libraries)
ii lttng-modules-dkms 2.10.8-1~ubuntu16.04.1 all Linux Trace Toolkit (LTTng) kernel modules (DKMS)
ii lttng-tools 2.10.5-1~ubuntu16.04.1 amd64 LTTng control and utility programs
~$ uname -a
Linux szymon 4.4.0-98-generic #121-Ubuntu SMP Tue Oct 10 14:24:03 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
~$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 16.04.5 LTS
Release: 16.04
Codename: xenial
~/lttng_train$ ps aux | grep lttng-sessiond
root 7862 0.0 0.3 859960 10880 ? Ssl 19:12 0:00 /usr/bin/lttng-sessiond
szymon 14853 0.0 0.0 15440 936 pts/1 S+ 22:21 0:00 grep --color=auto lttng-sessiond
~/lttng_train$ lsmod | grep lttng
~/