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Assorted Rants Tagged ‘TCP’, page 1:

(Almost-)Zero-Additional-Latency UDP-over-TCP

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Quote: “we realize that for some of the Clients – UDP just doesn’t work because of some weird firewall between Client and Server”
Another Quote: “there is nothing to block us (so head-of-line blocking doesn’t apply)”
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TCP Peculiarities as Applied to Games, Part II

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Quote: “Nagle’s algorithm aims to deal with those [CENSORED] developers who’re trying to send data over TCP in really small chunks (like 1 byte each time)”
Another Quote: “it seems that “proportional rate reduction” (PRR, reportedly used by Linux kernels by default starting from 3.2) performs for gaming purposes a little bit better than the alternatives”
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TCP Peculiarities for Games, part 1

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Quote: “the best we can hope when using a single TCP connection over 5%-loss channel – is having 1.5-second “lag spike” every 5 or so minutes, and a 3-second “lag spike” every 2 hours.”
Another Quote: “we may already have the-information-we-need on the receiving host – but this information is hidden from us by layers of abstraction on receiving side”
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Packet Loss for an App-Level Developer. Part I. Router Failures, BGP Convergence Time, AQM, Traffic Shapers.

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Quote: “All the routers, switches (actually – pretty much each and every device which forms Internet infrastructure) – are allowed to drop each and every packet.”
Another Quote: “TCP, when it observes a dropped packet, interprets it as an indication of congestion – and slows down.”
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