query about frame capture statistics

[Richard Beare <Richard.Beare@cmis.csiro.au>]

Hi all, 

I'm about to start writing some code to support a PCVision card to be
used in a piece of equipment and I'm a little confused about some of the
statistics produced by test_itifg. In particular, does the "frames
transeferred" measure refer to the number of frames transferred between
the board memory and main memory, while "frames captured" refers to
PCVision memory only. 

In my application I'm not particularly worried about frame rate. We'll
be capturing one image, analysising it, and then using the analysis
results to drive the machine. If the driver is continually moving image
data to main memory then there will probably be a considerable system
load caused by memory transfer of images that I'm never going to look
at. Am I correct in my interpretation, and if so, what is the
appropriate way to improve the situation?


Theis is the command I'm using and the relevant part of the response.

/test_itifg -f cameras/cv-m1-20pll-pcv.cam -o mmap -s select -t 1 -i

run statistics:
        frames captured 8,
        frames transfered 5,
        frames timedout 0,
        frames get_by_blocked 0.
        frames get_by_signal 0.
        frames get_by_select 1.

-- 
Richard Beare
Richard.Beare@cmis.csiro.au