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Date: Mon, 2 Jan 2012 16:21:10 +0100 From: Jean-Michel Hautbois <jhautbois@...il.com> To: netdev@...r.kernel.org Subject: TCP communication for raw image transmission Hi all, I am currently working on a way to send raw images (~400*300 YUV 4:2:0) at a relative high speed (raw image and not compressed image due to specific codec issues). This would represent about 57MBps/sec on a 100Mbps ethernet link. This link is direct, nothing else will pass through it. My question is a performance and efficiency question. Here is what I am thinking about : - I have the image on one computer at a known memory adress - I want top transmit this picture using TCP packets with the rule "1row = 1packet", maybe "2rows=1packet" - All these packets have to go on an ethernet link and will be received on another computer starting at a known memory adress Something like this : http://imageshack.us/photo/my-images/15/tcpmemory.png/ I was thinking about using TCP socket (of course) and the sendfile syscall on sender side, splice syscall on the receiver side, but I don't know if this is the best (and fastest) way to do it ? I would like to avoid memory copy as much as possible as the systems on which it will be done are embedded arm computers. TCP is chosen in order to get ordered packets, but maybe am I wrong ? Thanks for any clues you can give ! Regards, JM -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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