On 29 June 2018 at 13:55, Gert Doering <[email protected]> wrote: > Hi, > > On Fri, Jun 29, 2018 at 01:49:46PM +0100, [email protected] wrote: >> Just wondering what's the latest on the GPU for packet forwarding front (or >> is that deemed legacy now)? > > Last I've heard is that pixel shaders do not map really nicely to the > work needed for packet forwarding - so it works, but the performance gain > is not what you'd expect to see.
Which is to be expected right? Typical GPU instruction sets and ALUs are great for floating point operations which we don't need for packet processing. Packets typically need low complexity tasks performed at high rates. Various high end DC switches like Nexus boxes use GDDR5 RAM just as a graphics card would but the processing is done by an ASIC, which makes sense to me, that is not the place for general purpose x86 compute chips. This is a specific task. Cheers, James. _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
