Re:Dissecting QNX [pdf]
by tyingq on Wednesday September 19, 2018 @11:00AM
(#18024619)
Maybe also because things like DPDK (or similar) made it possible for Linix to play at that scale?
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The routers I am talking cannot do packet processing on the CPU. We are talking about 3.2 Tbps per linecard with 10 linecards per router.
All data plane activity is done on custom in-house ASICs called network processors (NPs). The CPU only handles control plane traffic and general administration.