Added by Bernd Hufmann about 12 years ago. Updated over 8 years ago.
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Description
LTTng Tools 2.1.0 offers the ability to configure filter when enabling events. It currently displays only that a filter is configured for command "lttng list <session>". It would be beneficial also to display the actual filter expression in the command output instead of displaying only [with filter].
Since we are in RC mode right now for 2.1.x, I am tagging this feature request for 2.2.
Thanks
I'm moving this feature for 2.6 unfortunately.
We are quite close to the rc1 of 2.5 and I feel uncomfortable adding this right now since it requires a lot of code and adding stuff to the public ABI/API. I usually prefer changes on the API done way before so people can play with it and we can make adjustment instead of rushing it.
I've started a branch containing some code for the feature but it's not working at all for now.
Just let me know when this is slowly getting to work. I'll match the MI as soon as possible. Don't hesitate to open a bug and assign it to.
Starting from 2.8 the filter expression is available on the command line and the mi.
E.g
Buffer type: per UID
Channels:
-------------
- channel0: [enabled]
Attributes:
overwrite mode: 0
subbufers size: 131072
number of subbufers: 4
switch timer interval: 0
read timer interval: 0
trace file count: 0
trace file size (bytes): 0
discarded events: 0
lost packets: 0
output: mmap()
Events:
* (type: tracepoint) [enabled] [filter: 'test']
<events>
<event>
<name>*</name>
<type>TRACEPOINT</type>
<enabled>true</enabled>
<filter_expression>test</filter_expression>
<exclusions/>
</event>
</events>
Cheers