LTTng » LTTng-tools

Disable all events on ust does not work.

lttng create mysession
lttng enable-event test -u
lttng enable-event test2 -u
lttng disable-event -u -a
lttng list mysession
killall lttng-sessiond

Result:

Spawning a session daemon
Session mysession created.
Traces will be written in /home/jonathan/lttng-traces/mysession-20150909-171434
UST event test created in channel channel0
UST event test2 created in channel channel0
Error: UST event not found
Tracing session mysession: [inactive]
    Trace path: /home/jonathan/lttng-traces/mysession-20150909-171434

=== Domain: UST global ===

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
      output: mmap()

    Events:
      test2 (type: tracepoint) [enabled]
      test (type: tracepoint) [enabled]

Looks like it works when using enable-event -u -a:

Traces will be written in /home/jonathan/lttng-traces/mysession-20150909-171544
All UST events are enabled in channel channel0
All UST events are disabled in channel channel0
Tracing session mysession: [inactive]
    Trace path: /home/jonathan/lttng-traces/mysession-20150909-171544

=== Domain: UST global ===

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
      output: mmap()

    Events:
      * (type: tracepoint) [disabled]

The behaviour on kernel/python/jul/log4j is to disable all event.

Session mysession created.
Traces will be written in /home/jonathan/lttng-traces/mysession-20150909-171705
Kernel event test created in channel channel0
All Kernel events are disabled in channel channel0
Tracing session mysession: [inactive]
    Trace path: /home/jonathan/lttng-traces/mysession-20150909-171705

=== Domain: Kernel ===

Channels:
-------------
- channel0: [enabled]

    Attributes:
      overwrite mode: 0
      subbufers size: 262144
      number of subbufers: 4
      switch timer interval: 0
      read timer interval: 200000
      trace file count: 0
      trace file size (bytes): 0
      output: splice()

    Events:
      test (loglevel: TRACE_EMERG (0)) (type: tracepoint) [disabled]