I am new to Tracing. I was trying to use Lttng in my Android based Dragonboard Develop kit. I installed Lttng with Bitbake, by adding below line in conf/local.conf
After the succesful build and flashing, I can access the Lttng in my platform. Below is the output of "lttng" command
LTTng Trace Control 2.6.0 - Gaia - v2.6.0
usage: lttng [OPTIONS] <COMMAND> [<ARGS>]
Options:
-V, --version Show version
-h, --help Show this help
--list-options Simple listing of lttng options
--list-commands Simple listing of lttng commands
-v, --verbose Increase verbosity
-q, --quiet Quiet mode
-m, --mi TYPE Machine Interface mode.
Type: xml
-g, --group NAME Unix tracing group name. (default: tracing)
-n, --no-sessiond Don't spawn a session daemon
--sessiond-path PATH Session daemon full path
--relayd-path PATH Relayd daemon full path
Commands:
add-context Add context to event and/or channel
calibrate Quantify LTTng overhead
create Create tracing session
destroy Tear down tracing session
enable-channel Enable tracing channel
enable-event Enable tracing event
disable-channel Disable tracing channel
disable-event Disable tracing event
list List possible tracing options
set-session Set current session name
snapshot Snapshot buffers of current session name
start Start tracing
stop Stop tracing
version Show version information
view Start trace viewer
save Save session configuration
load Load session configuration
Each command also has its own -h, --help option.
Please see the lttng(1) man page for full documentation.
When I try to create a session. I am getting below error.
/ # lttng create test-session
Spawning a session daemon
modprobe: ERROR: could not insert 'lttng_tracer': Required key not available
Error: Unable to load required module lttng-tracer
Warning: No kernel tracer available
Session test-session created.
Traces will be written in /home/root/lttng-traces/test-session-19700101-000212
Error: Unable to create config file
Error: Command error
Please help me.
Thanks in Advance.