projects / lttng-tools.git / blame
| Commit | Line | Data |
|---|---|---|
| 11533074 JG |
1 | lttng-metadata(1) |
| 2 | ================= | |
| 3 | ||
| 4 | ||
| 5 | NAME | |
| 6 | ---- | |
| 7 | lttng-metadata - Manage an LTTng tracing session's metadata generation | |
| 8 | ||
| 9 | ||
| 10 | SYNOPSIS | |
| 11 | -------- | |
| 12 | [verse] | |
| ce19b9ed | 13 | *lttng* ['linkgenoptions:(GENERAL OPTIONS)'] *metadata regenerate* [option:--session='SESSION'] |
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14 | |
| 15 | ||
| 16 | DESCRIPTION | |
| 17 | ----------- | |
| 18 | The `lttng metadata` command manages a tracing session's metadata | |
| 19 | generation options. | |
| 20 | ||
| 21 | As of this version, only the `regenerate` command's action is available. | |
| 22 | Regenerating a tracing session's metadata can be used to | |
| 23 | resample the offset between the system's monotonic clock and | |
| 24 | the wall-clock time. | |
| 25 | ||
| 26 | This command is meant to be used to resample the wall-clock time | |
| 27 | following a major | |
| 28 | link:https://en.wikipedia.org/wiki/Network_Time_Protocol[NTP] | |
| 29 | correction. As such, a system booting with an incorrect wall time can be | |
| 30 | traced before its wall time is NTP-corrected. Regenerating the tracing | |
| 31 | session's metadata ensures that trace viewers can accurately determine | |
| 32 | the events time relative to Unix Epoch. | |
| 33 | ||
| 34 | ||
| 35 | include::common-cmd-options-head.txt[] | |
| 36 | ||
| 37 | ||
| 38 | option:-s, option:--session='SESSION':: | |
| 39 | Manage the metadata generation of the tracing session named 'SESSION' | |
| 40 | instead of the current tracing session. | |
| 41 | ||
| 42 | ||
| 43 | include::common-cmd-help-options.txt[] | |
| 44 | ||
| 45 | ||
| 46 | LIMITATIONS | |
| 47 | ----------- | |
| 48 | The `lttng metadata regenerate` command can only be used on kernel and | |
| 49 | user space tracing sessions (using per-user buffering), in non-live | |
| 50 | mode. | |
| 51 | ||
| 7c1a4458 PP |
52 | See man:lttng-enable-channel(1) for more information about |
| 53 | buffering schemes and man:lttng-create(1) for more information | |
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54 | about the different tracing session modes. |
| 55 | ||
| 56 | ||
| 57 | include::common-cmd-footer.txt[] | |
| 58 | ||
| 59 | ||
| 60 | SEE ALSO | |
| 61 | -------- | |
| 7c1a4458 | 62 | man:lttng(1) |