UpTheCreek asked:
Does anyone know how to check the current value of initcwnd? (particularly on Debian [Squeeze])
I’ve searched, but can’t find a definitive answer to this. I haven’t changed it, but may want to depending on it’s current setting.
My answer:
Get the source code of your running kernel and inspect include/net/tcp.h. There you will find:
/* TCP initial congestion window */
#define TCP_INIT_CWND 10
This being the default value, and rarely changed even in userland, it isn’t otherwise exposed.
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