Re: setup problems for PCVision + JAI CV-M1

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

I have another general question about the driver operation. I'm looking
at an application that doesn't need real time performance - we'll be
capturing 1 image and using the results of an analysis to drive a
machine. I've chopped out enough bits of test_itifg to produce some test
code capable of capturing an image using mmap and select modes. The
statistics printed by the Clean_Up function are

run statistics:
        frames captured 9,
        frames transfered 5,
        frames timedout 0,
        frames get_by_blocked 0.
        frames get_by_signal 0.
        frames get_by_select 1.

a similar set of stats is produced by the test_itifg program when using
equivalent parameters.

run statistics:
        frames captured 9,
        frames transfered 5,
        frames timedout 0,
        frames get_by_blocked 0.
        frames get_by_signal 0.
        frames get_by_select 1.

I'm a little confused about what controls the "frames transferred". I'm
assuming that this means frames transferred between framebuffer memory
and main memory, and that this is likely to be something of a
performance penalty if the data is not required. Is this something I
have control of, and if so how?

Thanks.

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