[libcamera-devel] How to activate AGC control in libcamera, or set the GAIN/EXPOSURE parameter by v4l2 command.

[Naushir Patuck]

Hi all,

I did try a long running test, and interestingly, mine did also fail
at around the 15hour mark (approx 1540000 frames).  My qcam process
(running under gdb) was just terminated at that point.  However, no
reboot occurred.  Looking at the dmesg logs, it seems that the Out of
Memory killer terminated the task.  This suggests that there is maybe
a memory leak lurking somewhere in either libcamera core or the
Raspberry Pi ipa/pipeline handler.

Nomura-san, could you send us the output of dmesg when you run into
this failure again, just to check if we are seeing the same thing?

Thanks,
Naush

On Thu, 8 Oct 2020 at 07:48, <tetsuya.nomura at soho-enterprise.com> wrote:
>
> Dear David-san
>
> We took a log to catch when (how long time after application start) reboot occurs.
> The logs says around 1100minuite, maybe the raspi got rebooted, no other log.
>
> And the older version and the combination, this phenomena never happened.
>
> libcamera: c3548a333f86d31213ca9f2ccc3faf743b246743
> rpi-update: f794477c7c48061a720d6b9331d27f8d0300009c
> (We are using the latest one for both.)
>
> Best Regards,
>
> NOMURA
> -----Original Message-----
> From: David Plowman <david.plowman at raspberrypi.com>
> Sent: Wednesday, October 7, 2020 7:37 PM
> To: tetsuya.nomura at soho-enterprise.com
> Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>; Kieran Bingham <kieran.bingham at ideasonboard.com>; libcamera-devel at lists.libcamera.org
> Subject: Re: [libcamera-devel] How to activate AGC control in libcamera, or set the GAIN/EXPOSURE parameter by v4l2 command.
>
> Hello Nomura-san
>
> Thanks for your message.
>
> So we're not aware of any problems like the one you report but we'll see if we can reproduce it - obviously it will take a little while. Do you believe the Pi crashed completely and rebooted? If so, might we be able to get any system logs that could give us a clue as to what happened?
>
> Thanks and best regards
> David
>