Greetings,
sorry if this winds up a double/triple post, it doesn't seem to have gone
though the first time, and my mailer's giving me fits...
I've been put in charge of a project to use RT-Linux to do some hard
real-time image processing at 30-60 frames per second. What I need to do
is run a userspace program to analyse one image, and somehow interrupt
that program at every 3 ms (for 30 fps) to do some accounting and book
keeping, and then interrupt it every 33 ms to tell it to move onto the
next image. I'm at a loss for how to go about doing it.
I can set up two timers in the kernel (one with a period of 3 ms and the
other with a period of 33), but how do I get these timered interrupts to
interrupt the user space process? More importantly, how can I guarantee
that the user space program has spent at least most of the time actually
running? (The target system is a 4-way SMP P3 system).. I don't want to
run the processing code in the kernel because it's a progressive algorithm
that would never yield (do I understand that correnctly? it will process
as much of the image as possible and then move on when it's told, so no
user space processes would ever run??).
Any ideas would be a great help... I'm really at a loss for this one, and
I'll admit i'm still coming up to speed in the real-time world..
thanks,
john.c
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/* John Clemens http://www.rpi.edu/~clemej _/ "I Hate Quotes" */
/* ICQ: 7175925 [EMAIL PROTECTED] _/ -- Samuel L. Clemens */
/* RPI Comp. Eng. 2000, Linux Parallel/Network/OS/Driver Specialist */
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