On Jan 20, 2012, at 11:20 AM, Ira Weiny wrote: > On Fri, 20 Jan 2012 06:18:44 -0800 > "Atchley, Scott" <atchle...@ornl.gov> wrote: > >> Interesting. It totally hijacks the NIC; all traffic is captured. You would >> have to implement your own IP stack, Verbs stack, etc. >> > > Can multiple user space processes share the card? If so, how is security > handled between them?
It is not clear from the paper I scanned. There does seem to be a mechanism to send selected packets up the host stack. Scott > > Ira > >> Scott >> >> On Jan 19, 2012, at 11:50 AM, Yann Droneaud wrote: >> >>> Hi, >>> >>> I have discovered today the netmap project[1] through an ACM Queue >>> article[2]. >>> >>> Netmap is a new interface to send and receive packets through an >>> Ethernet interface (NIC). It seems to provide a raw access to network >>> interface in order to process packets at high rate with a low overhead. >>> >>> This is an another example of "kernel-bypass"/"zero-copy" which are core >>> features of InfiniBand verbs/RDMA. >>> >>> But unlike InfiniBand verbs/RDMA, Netmap seems to have a very small API. >>> >>> Such API could be enough to build an unreliable datagram messaging >>> system on "low cost" hardware (without concerns of determinism, flow >>> control, etc.). >>> >>> I'm asking myself if the way netmap exposes internal NIC rings could be >>> applicable for IB/IBoE HCA ? e.g. beyond 10GbE NIC, is netmap relevant ? >>> >>> Regards. >>> >>> [1] http://info.iet.unipi.it/~luigi/netmap/ >>> >>> netmap - a novel framework for fast packet I/O >>> Luigi Rizzo Università di Pisa >>> >>> [2] http://queue.acm.org/detail.cfm?id=2103536 >>> >>> Revisiting Network I/O APIs: The netmap Framework >>> Luigi Rizzo, 2012-01-17 >>> >>> -- >>> Yann Droneaud >>> >>> >>> -- >>> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in >>> the body of a message to majord...@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-rdma" in >> the body of a message to majord...@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > > -- > Ira Weiny > Member of Technical Staff > Lawrence Livermore National Lab > 925-423-8008 > wei...@llnl.gov -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
