1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
|
**-c**, **--cpus** *cpu-list*
Set the osnoise tracer to run the sample threads in the cpu-list.
**-H**, **--house-keeping** *cpu-list*
Run rtla control threads only on the given cpu-list.
**-d**, **--duration** *time[s|m|h|d]*
Set the duration of the session.
**-D**, **--debug**
Print debug info.
**-e**, **--event** *sys:event*
Enable an event in the trace (**-t**) session. The argument can be a specific event, e.g., **-e** *sched:sched_switch*, or all events of a system group, e.g., **-e** *sched*. Multiple **-e** are allowed. It is only active when **-t** or **-a** are set.
**--filter** *<filter>*
Filter the previous **-e** *sys:event* event with *<filter>*. For further information about event filtering see https://www.kernel.org/doc/html/latest/trace/events.html#event-filtering.
**--trigger** *<trigger>*
Enable a trace event trigger to the previous **-e** *sys:event*.
If the *hist:* trigger is activated, the output histogram will be automatically saved to a file named *system_event_hist.txt*.
For example, the command:
rtla <command> <mode> -t -e osnoise:irq_noise --trigger="hist:key=desc,duration/1000:sort=desc,duration/1000:vals=hitcount"
Will automatically save the content of the histogram associated to *osnoise:irq_noise* event in *osnoise_irq_noise_hist.txt*.
For further information about event trigger see https://www.kernel.org/doc/html/latest/trace/events.html#event-triggers.
**-P**, **--priority** *o:prio|r:prio|f:prio|d:runtime:period*
Set scheduling parameters to the osnoise tracer threads, the format to set the priority are:
- *o:prio* - use SCHED_OTHER with *prio*;
- *r:prio* - use SCHED_RR with *prio*;
- *f:prio* - use SCHED_FIFO with *prio*;
- *d:runtime[us|ms|s]:period[us|ms|s]* - use SCHED_DEADLINE with *runtime* and *period* in nanoseconds.
**-C**, **--cgroup**\[*=cgroup*]
Set a *cgroup* to the tracer's threads. If the **-C** option is passed without arguments, the tracer's thread will inherit **rtla**'s *cgroup*. Otherwise, the threads will be placed on the *cgroup* passed to the option.
**--warm-up** *s*
After starting the workload, let it run for *s* seconds before starting collecting the data, allowing the system to warm-up. Statistical data generated during warm-up is discarded.
**--trace-buffer-size** *kB*
Set the per-cpu trace buffer size in kB for the tracing output.
**-h**, **--help**
Print help menu.
|
