Yeah, I actually need a network processor (NPU) where I can run Linux. Something like NPS-400, Ericsson SNP 4000 or Freescale T4240. A Ericsson research paper [1] also designed a hypothetical a 256 core ARM Cortex-m3 based NPU. Do you know of any many-core NPU based development board where I can install linux? 1. http://conferences.sigcomm.org/sigcomm/2013/papers/hotsdn/p103.pdf Many thanks for the help!! On Wed, Nov 29, 2017 at 12:37 AM, Gilad Ben-Yossef <gilad@xxxxxxxxxxxxx> wrote: > Hi, > > On Tue, Nov 28, 2017 at 10:38 PM, Jesper Dangaard Brouer <brouer@xxxxxxxxxx> > wrote: >> >> >> On Tue, 28 Nov 2017 15:00:04 -0500 "MD I. Islam" <tamim@xxxxxxxxxxx> >> wrote: >> >> > On Tue, Nov 28, 2017 at 6:02 AM, Jesper Dangaard Brouer >> > <brouer@xxxxxxxxxx> wrote: >> > > >> > > On Mon, 27 Nov 2017 18:33:10 -0500 "MD I. Islam" <tamim@xxxxxxxxxxx> >> > > wrote: >> > > >> > >> I was wondering if XDP can scale to many-core NPU (such as NPS-400 >> > >> which has 256 cores)? I need to develop a XCP/RCP like application >> > >> that can achieve bare-metal performance on each core. The application >> > >> will run in a run-to-completion model. I see, DPDK can run userspace >> > >> application on each core. I'm wondering if XDP has anything like >> > >> that? >> > >> Please let me know any suggestion. >> > > >> > > Hi Tamim, >> > > >> > > I think you are mixing up things a bit here... >> > > >> > > You mention a specific NIC (NPS-400) which have many cores inside the >> > > NIC. You need to understand XDP is a software solution, where the >> > > programming language is eBPF. XDP does NOT run inside the NIC, >> > > instead >> > > XDP runs as the earliest possible step in the Linux kernel network >> > > stack. >> > > >> > > The only NIC that does hardware offloading of XDP is Netronome[1], see >> > > their white papers[2]. >> > >> > Hi Jesper >> > >> > I was looking at >> > >> > http://events.linuxfoundation.org/sites/events/files/slides/Massively_Multi-Core_LPC_2013.pdf. >> > It looks like the NPS-400 NIC also runs an embedded Linux itself. The >> > packets are processed by the embedded ARC processor. Packets >> > processing however is done at userspace. They also use DPDK-like >> > framework OpenNPU/NPS SDK to bypass the kernel. Is it possible to >> > achieve something similar to using XDP? Please let me know if I'm >> > getting anything wrong. I'm not sure if it is possible for me (a >> > third party developer/PhD student) to load a customized Linux on the >> > their NIC. >> >> You should ask Gilad Ben-Yossef (Cc'ed), if he can help you getting XDP >> working on this NIC? ;-) >> >> > The NPS-400 wasn't a NIC but a network processor designed for a router and > anyway AFAIK, Mellanox (who purchased EZchip) killed this product line. > You might find their BlueField based NIC more suitable for what you want. > > I no longer work for Mellanox :-) > > Gilad > > > -- > Gilad Ben-Yossef > Chief Coffee Drinker > > "If you take a class in large-scale robotics, can you end up in a situation > where the homework eats your dog?" > -- Jean-Baptiste Queru
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