[Ovmsdev] webserver (?) crash

[Michael Balzer]

Am 20.03.2018 um 06:47 schrieb Greg D.:
> Ok, interesting.  Am I seeing an out-of-memory crash?  I can't tell...
>
> It seems like the webserver status button is the worst offender,
> probably because it's doing a lot of work and building a big payload. 
> Very often hangs for a while before responding, and if so, usually
> results in the job queue overflow.  If I catch it quick enough and hit
> home or some other shorter task, the overflow will drain and I'll get
> the new screen; otherwise a crash.  Sometimes there will be a timeout
> mixed in.  I'm wondering if our little squirrel in the ESP32 just can't
> pedal hard enough...

Most crashes now are related to lack of free memory.

Regarding the status page I just hit the page 10 times:

OVMS# mo m
Free 8-bit 27264/283200, 32-bit 27544/55820, SPIRAM 0/0
I (784440) webserver: HTTP GET /status
D (785010) webserver: Serve /status: 6068 bytes used, 21200 free
I (787240) webserver: HTTP GET /status
D (787830) webserver: Serve /status: 6064 bytes used, 21168 free
I (788720) webserver: HTTP GET /status
D (789290) webserver: Serve /status: 6104 bytes used, 21164 free
I (790110) webserver: HTTP GET /status
D (790700) webserver: Serve /status: 6100 bytes used, 21164 free
I (791530) webserver: HTTP GET /status
D (792120) webserver: Serve /status: 6068 bytes used, 21200 free
I (792980) webserver: HTTP GET /status
D (793550) webserver: Serve /status: 6100 bytes used, 21164 free
I (794400) webserver: HTTP GET /status
D (794980) webserver: Serve /status: 6068 bytes used, 21200 free
I (795860) webserver: HTTP GET /status
D (796730) webserver: Serve /status: 6100 bytes used, 21164 free
I (797160) webserver: HTTP GET /status
D (797740) webserver: Serve /status: 6064 bytes used, 21168 free
I (798430) webserver: HTTP GET /status
D (799020) webserver: Serve /status: 6060 bytes used, 21200 free
OVMS# mo m
Free 8-bit 27264/283200, 32-bit 27544/55820, SPIRAM 0/0

So no memory loss and no crashes.

The 6K is just the buffer usage after processing. The commands executed for the status page need additional RAM, but above 20 K free, the page normally has no
problems.

Regards,
Michael

-- 
Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
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