Disable TCP Delayed ACKs

user_40620 0
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I have an application that receives relatively sparse traffic over TCP with no application-level responses. I believe the TCP stack is sending delayed ACKs (based on glancing at a network packet capture). What is the recommended way to disable delayed-ACK in the network stack for a single socket? I've looked at TCP_QUICKACK, but it seems that the stack will change it under my feet anyways.

This is running on a Linux 2.6 kernel, and I am not worried about portability.

tcp linux
3 Answers

The accepted answer has a bug, it should be

flags = 0;
flglen = sizeof(flags);
setsockopt(sfd, SOL_TCP, TCP_QUICKACK, &flags, flglen)

(SOL_TCP, not IPPROTO_TCP)

Post here in case someone need it.

As @damolp suggested, it is not a bug. Keep it here for record.

user_84337690
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