LTTng » LTTng-tools

While testing the 2.2 RC tracefile size limit feature I came across this situation:

lttng create session foo
lttng enable-channel -u channel -s foo -C 8192
lttng enable-event "tp:tptest" -s foo -c channel -u
lttng start

[app is running...]

lttng stop
lttng destroy

The resulting trace folder look like this:

-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_0_0
-rw-rw---- 1 sib users 8.0K Apr 29 15:53 channel_1_0
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_1_1
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_1_2
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_1_3
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_1_4
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_2_0
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_3_0
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_4_0
-rw-rw---- 1 sib users 8.0K Apr 29 15:53 channel_5_0 <-- OK
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_1 --+ Why not 8K?
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_2   |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_3   |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_4   |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_5   |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_6   |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_7   |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_8   |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_9   |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_10  |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_11  |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_12  |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_13  |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_14  |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_15  |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_16  |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_17  |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_18  |
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_5_19--+
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_6_0
-rw-rw---- 1 sib users 4.0K Apr 29 15:53 channel_7_0
-rw-rw---- 1 sib users 8.0K Apr 29 15:53 metadata