Difference between revisions of "Module/System monitor"
Jump to navigation
Jump to search
(add note that the sys_mon module has to run at the full main freq) |
(slightly more details on the sys_mon report) |
||
| Line 1: | Line 1: | ||
<categorytree style="float:right; clear:right; margin-left:1ex; border: 1px solid gray; padding: 0.7ex;" mode=pages>Modules</categorytree> | <categorytree style="float:right; clear:right; margin-left:1ex; border: 1px solid gray; padding: 0.7ex;" mode=pages>Modules</categorytree> | ||
The sys_mon module gives you some information about the timing of the periodic tasks | The sys_mon module gives you some information about the timing of the periodic tasks and a rough estimate of cpu load (averaged over 1 sec). | ||
The SYS_MON message contains the following information: | |||
; periodic_time : time in us between two calls of the main periodic function (averaged over 1s) | |||
; periodic_cycle : time in us it took to execute the main periodic functions (averaged over 1s) | |||
; periodic_cycle_min : minimum time in us it took to execute the main periodic functions during the last second | |||
; periodic_cycle_max : maximum time in us it took to execute the main periodic functions during the last second | |||
; event_number : number of times the event loop was called during the last second | |||
; cpu_load : rough estimate of cpu load (averaged over 1 sec) | |||
So your periodic_time should be 1/PERIODIC_FREQUENCY. | |||
The periodic_cycle_max should not be over the periodic_time, otherwise in at least one cycle it took longer to calculate everything and the next one was slightly delayed. | |||
'''The sys_mon module has to run at the full main frequency!''' | '''The sys_mon module has to run at the full main frequency!''' | ||
Revision as of 06:47, 23 August 2013
The sys_mon module gives you some information about the timing of the periodic tasks and a rough estimate of cpu load (averaged over 1 sec).
The SYS_MON message contains the following information:
- periodic_time
- time in us between two calls of the main periodic function (averaged over 1s)
- periodic_cycle
- time in us it took to execute the main periodic functions (averaged over 1s)
- periodic_cycle_min
- minimum time in us it took to execute the main periodic functions during the last second
- periodic_cycle_max
- maximum time in us it took to execute the main periodic functions during the last second
- event_number
- number of times the event loop was called during the last second
- cpu_load
- rough estimate of cpu load (averaged over 1 sec)
So your periodic_time should be 1/PERIODIC_FREQUENCY.
The periodic_cycle_max should not be over the periodic_time, otherwise in at least one cycle it took longer to calculate everything and the next one was slightly delayed.
The sys_mon module has to run at the full main frequency!
So either don't specify a main_freq parameter like in the example below or set your actual main frequency
To use it load the sys_mon module:
| File: conf/airframes/myplane.xml |
<modules>
...
<load name="sys_mon.xml"/>
</modules>
|