mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-30 04:00:37 +00:00
f38a2c4ea7
Original commit message from CVS: added some thoughts about scheduler doing a little profiling on elements
26 lines
745 B
Text
26 lines
745 B
Text
$Id$
|
|
|
|
Could schedulers do a little profiling?
|
|
|
|
* scheduler keeps a list of usecs the process function of each element was
|
|
running
|
|
* process functions are: loop, chain, get
|
|
* scheduler keeps a sum of all times
|
|
* each gst-element has a profile_percentage field
|
|
|
|
* when going to play
|
|
* scheduler sets sum and all usecs in the list to 0
|
|
* when handling an element
|
|
* remember old usecs t_old
|
|
* take time t1
|
|
* call elements processing function
|
|
* take time t2
|
|
* t_new=t2-t1
|
|
* sum+=(t_new-t_old)
|
|
* profile_percentage=t_new/sum;
|
|
* should the percentage be averaged?
|
|
* profile_percentage=(profile_percentage+(t_new/sum))/2.0;
|
|
|
|
* the profile_percentage shows how much CPU time the element uses in relation
|
|
to the whole pipeline
|
|
|