lttng_benchmark

Linux(debug)#
Linux(debug)# clear
Linux(debug)# lttng create
Session auto-20170823-003745 created.
Traces will be written in /root/lttng-traces/auto-20170823-003745
Linux(debug)# lttng enable-event -u 'tp_0:*'
UST event tp_0:* created in channel channel0
Linux(debug)#
Linux(debug)# lttng start
Tracing started for session auto-20170823-003745
Linux(debug)# lttng list auto-20170823-003745
Tracing session auto-20170823-003745: [active]
    Trace path: /root/lttng-traces/auto-20170823-003745

=== 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:
      tp_0:* (type: tracepoint) [enabled]

Linux(debug)#
Linux(debug)#
Linux(debug)# cd /root

Linux(debug)# ./lttng
lttng-traces/        lttng_benchmark.bin
Linux(debug)# ./lttng_benchmark.bin
Time to log using      lttng with 5 arguments is: 1894063 microseconds
Linux(debug)# lttng stop
Waiting for data availability.
Tracing stopped for session auto-20170823-003745
Linux(debug)# lttng view | wc -l
1000000
Linux(debug)#
Linux(debug)#
Linux(debug)#
Linux(debug)# lttng destroy
Session auto-20170823-003745 destroyed
Linux(debug)# cd lttng-traces
Linux(debug)# ls
auto-20170823-003745
Linux(debug)# rm -rf *
Linux(debug)# cd
Linux(debug)#
Linux(debug)#
Linux(debug)# lttng create
Session auto-20170823-003907 created.
Traces will be written in /root/lttng-traces/auto-20170823-003907
Linux(debug)#lttng enable-channel --userspace --num-subbuf 16 --subbuf-size 1024k test_channel
UST channel test_channel enabled for session auto-20170823-003907
Linux(debug)#
Linux(debug)#
Linux(debug)# lttng enable-event -u -c test_channel 'tp_0:*'
UST event tp_0:* created in channel test_channel
Linux(debug)#
Linux(debug)#
Linux(debug)# lttng start
Tracing started for session auto-20170823-003907
Linux(debug)#
Linux(debug)#
Linux(debug)# cd /root
Linux(debug)# ./lttng_benchmark.bin
Time to log using      lttng with 5 arguments is: 1882393 microseconds
Linux(debug)# lttng list  auto-20170823-003907
Tracing session auto-20170823-003907: [active]
    Trace path: /root/lttng-traces/auto-20170823-003907

=== Domain: UST global ===

Buffer type: per UID
Channels:
-------------
- test_channel: [enabled]

    Attributes:
      overwrite mode: 0
      subbufers size: 1048576
      number of subbufers: 16
      switch timer interval: 0
      read timer interval: 0
      trace file count: 0
      trace file size (bytes): 0
      output: mmap()

    Events:
      tp_0:* (type: tracepoint) [enabled]

Linux(debug)# lttng stop
Waiting for data availability.
Tracing stopped for session auto-20170823-003907
Linux(debug)#
Linux(debug)#
Linux(debug)# lttng view | wc -l
1000000