[libcamera-devel] swisp performance notes

[Kieran Bingham]

Quoting Milan Zamazal via libcamera-devel (2023-12-15 09:47:39)
> Pavel Machek via libcamera-devel <libcamera-devel at lists.libcamera.org> writes:
> 
> > For some reason latest version uses full sensor resolution.
> 
> The same here on Debix Model A (with SoftwareISP-v04-hans1):
> 
>   DEBUG SimplePipeline simple.cpp:1005 Picked 3280x2464-SRGGB10_1X10 -> 3280x2464-SRGGB10 for max stream size 3276x2460
> 
> Resulting in:
> 
>   # ./cam -c 1 --capture=1 -s role=still
>   ...
>   ERROR V4L2 v4l2_videodevice.cpp:1906 /dev/video1[15:cap]: Failed to start streaming: Cannot allocate memory
> 
> The failing line is:
> 
>   ret = ioctl(VIDIOC_STREAMON, &bufferType_);
> 
> This is with available memory ~1.5 GB.

Have you configured any CMA? I think CMA defaults to 32MB which won't be
sufficient for processing large images.

> 
> And:
> 
>   # LIBCAMERA_LOG_LEVELS='*:DEBUG' ./cam -c 1 --capture=1 -s role=still,width=640,height=480
>   DEBUG SimplePipeline simple.cpp:751 Link 'imx219 1-0010':0 -> 'csis-32e40000.csi':0 configured with format 640x480-SRGGB10_1X10
>   ...
>   DEBUG SimplePipeline simple.cpp:1005 Picked 640x480-SRGGB10_1X10 -> 640x480-SRGGB10 for max stream size 640x480
>   DEBUG SimplePipeline simple.cpp:1045 Adjusting size from 640x480 to 640x480
>   ERROR Camera camera.cpp:1171 Can't configure camera with invalid configuration
> 
> It's hard for me to distinguish without deeper inspection whether dealing with
> features or non-optimal defaults or user errors.
> 
> Regards,
> Milan
>