Difference between revisions of "Module/System monitor"
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(created page for sys_mon module, with only some basic info) |
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<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 ('''all times are given in microseconds'''): | |||
; periodic_time : time between two calls of the main periodic function (averaged over 1s) | |||
; periodic_cycle : time it took to execute the main periodic functions (averaged over 1s) | |||
; periodic_cycle_min : minimum time it took to execute the main periodic functions during the last second | |||
; periodic_cycle_max : maximum time 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 ''[[Modules#In_the_airframe_file|main_freq]]'' parameter like in the example below or set your actual main frequency''' | |||
To use it load the sys_mon module: | To use it load the sys_mon module: | ||
Latest revision as of 09:25, 26 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 (all times are given in microseconds):
- periodic_time
- time between two calls of the main periodic function (averaged over 1s)
- periodic_cycle
- time it took to execute the main periodic functions (averaged over 1s)
- periodic_cycle_min
- minimum time it took to execute the main periodic functions during the last second
- periodic_cycle_max
- maximum time 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>
|