Date: Sun, 28 Nov 1999 14:27:08 -0600 (CST) From: Mohit Aron <aron@cs.rice.edu> To: freebsd-net@freebsd.org Subject: interaction between Nagle's algorithm and TCP delayed ACKs Message-ID: <199911282027.OAA04627@cs.rice.edu>
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Hi, FreeBSD-2.2.6 had a macro called ACK_HACK in /sys/netinet/tcp_input.c that was effective in avoiding the undesirable interactions between the TCP Nagle's algorithm and the delayed ACKs. Basically, if the PUSH flag on a packet was set, this macro forced TCP to send an acknowledgment immediately. Since the PUSH flag is usually set on small packets that trigger Nagle's algorithm, this macro was effective. I checked the code for FreeBSD-3.3 and this macro is no longer there in /sys/netinet/tcp_input.c. Can this feature be re-added in later releases. In fact, I'd even like it to be turned on by default (it wasn't enabled in FreeBSD-2.2.6 by default). - Mohit To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message
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