Updating 'known issues' for Linux TCP buffer size oddness
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@ -138,3 +138,8 @@ try "-l 4K".
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* On OpenBSD, the server seems to require a "-4" argument, implying
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that it can only be used with IPv4.
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* When specifying the TCP buffer size using the "-w" flag on Linux, Linux
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doubles the value you pass in. (You can see this using iperf3's debug flag).
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But then the CWND does not actually ramp up to the doubled value, but only
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to about 75% of the doubled value. This appears to be by design.
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