[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Thu, 01 Feb 2007 18:59:53 -0600
From: Robert Hancock <hancockr@...w.ca>
To: Lapo TIN <lapolapolapo@....it>
Cc: james.garcia@...sd.net, linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: smp and irq conflict
Lapo TIN wrote:
> I need to capture at 25 frame per second from each channel...
> So 25 x 8 total frames per second on the pci.
>
>
> So do you think I have to change the motherboard ?
> What is important ? the chipset ? is there specification I need ?
What resolution are you using? 720x480 with 24 bits per pixel and 25fps
will use about 25MB/sec on the PCI bus, there is no way you can keep up
with 8 channels running on a standard 32-bit 33MHz PCI bus which can
only transfer 133 MB/sec at most. If you need this much transfer rate,
you likely need PCI Express or PCI-X capture cards or at least a
motherboard which has multiple PCI buses (which most desktop boards
don't typically have).
You may be able to reduce the resolution and/or frame rate in order to
allow the PCI bus to cope. Also, do you have enough CPU and disk speed
in order to cope with all these streams?
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from hancockr@...pamshaw.ca
Home Page: http://www.roberthancock.com/
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists