I think you are going to have some issue because you are trying to have the HW do some filtering which a driver (or existing user-space tool) would need to be in communications with your application to do this. That's why the PF_RING is processing all the packets. In your case you are trying to use some driver functions but then want to do other things in user-space.
You should also be careful using the term zero-copy as it has a lot of different meanings over the years. Have you looked at DPDK from another group here at Intel? Go to www.intel.com and search on DPDK to find out all about it. Cheers, John > -----Original Message----- > From: Brian C. Wiles [mailto:bwi...@o1.com] > Sent: Friday, August 02, 2013 12:36 PM > To: 'e1000-devel@lists.sourceforge.net' > Subject: [E1000-devel] Zero-Copy Support > > Hi, > > I've been looking for the fastest way to receive packets at wire line > speed. It looks like using the mmap with the packet socket interface > in the kernel is the best way to save 1 data copy per packet. I have a > quad-port 82575GB Intel NIC. Does the current igb driver (or whatever > I should use) support the chip's capability to read/write directly to > the NIC's memory from userspace? > > I'm developing an application to hairpin UDP packets from one host to > another, and I need as quick operation as possible. I've seen mention > of PF_RING and DNA, but it appears the kernel already has the support I > need (via mmap) minus direct access to the NIC's memory. > > Ideally, I want to have the ability to assign an IP address to, say, > eth0 and read from eth0 only the UDP packets destined to my > application's port. With PF_RING DNA, I would have to process all the > packets that arrived on that interface, including ARP, since the kernel > is no longer in the loop. > > Is there a way to do this with the stock kernel and igb driver, or do > I need to implement some sort of zero-copy logic in the kernel? If > there's a better way to do this, please let me know. Thanks. > > -Brian > > Brian C. Wiles | Director of Software Development > O1 Communications > 5190 Golden Foothill Pkwy, > El Dorado Hills, CA 95762 > office: 916.235.2032 > email: bwi...@o1.com<mailto:bwi...@o1.com> | web: > www.o1.com<http://www.o1.com/> ------------------------------------------------------------------------------ Get your SQL database under version control now! Version control is standard for application code, but databases havent caught up. So what steps can you take to put your SQL databases under version control? Why should you start doing it? Read more to find out. http://pubads.g.doubleclick.net/gampad/clk?id=49501711&iu=/4140/ostg.clktrk _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
