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What congestion control algorithm is implemented in TCP in OSX 10.9? I would like to know if it uses NewReno, or something newer like Cubic in Linux.

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  • So you want to know what congestion avoidance algorithm is used, is that the question? (See also stackoverflow.com/questions/8532372/…)
    – slhck
    Commented Jan 17, 2015 at 8:49
  • Yes it is. Thanks for the link, I'm gonna dig into it
    – Mychele
    Commented Jan 17, 2015 at 8:52

1 Answer 1

Reset to default
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In OSX Yosemite it appears to be CUBIC. In the sysctl -a output I see

net.inet.tcp.newreno_sockets: 0
net.inet.tcp.cubic_sockets: 21
net.inet.tcp.use_newreno: 0
net.inet.tcp.cubic_tcp_friendliness: 0
net.inet.tcp.cubic_fast_convergence: 0
net.inet.tcp.cubic_use_minrtt: 0
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