Author: tuexen Date: Sat May 4 10:38:54 2019 New Revision: 347096 URL: https://svnweb.freebsd.org/changeset/base/347096
Log: MFC r344368: Reduce the TCP initial retransmission timeout from 3 seconds to 1 second as allowed by RFC 6298. Reviewed by: kbowling@, Richard Scheffenegger Sponsored by: Netflix, Inc. Differential Revision: https://reviews.freebsd.org/D18941 Modified: stable/12/sys/netinet/tcp_syncache.c stable/12/sys/netinet/tcp_timer.h Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/netinet/tcp_syncache.c ============================================================================== --- stable/12/sys/netinet/tcp_syncache.c Sat May 4 10:36:16 2019 (r347095) +++ stable/12/sys/netinet/tcp_syncache.c Sat May 4 10:38:54 2019 (r347096) @@ -159,7 +159,7 @@ static int syncookie_cmp(struct in_conninfo *inc, str * tcp_backoff[1] + * tcp_backoff[2] + * tcp_backoff[3]) + 3 * tcp_rexmit_slop, - * 3000 ms * (1 + 2 + 4 + 8) + 3 * 200 ms = 45600 ms, + * 1000 ms * (1 + 2 + 4 + 8) + 3 * 200 ms = 15600 ms, * the odds are that the user has given up attempting to connect by then. */ #define SYNCACHE_MAXREXMTS 3 Modified: stable/12/sys/netinet/tcp_timer.h ============================================================================== --- stable/12/sys/netinet/tcp_timer.h Sat May 4 10:36:16 2019 (r347095) +++ stable/12/sys/netinet/tcp_timer.h Sat May 4 10:38:54 2019 (r347096) @@ -77,7 +77,7 @@ #define TCPTV_MSL ( 30*hz) /* max seg lifetime (hah!) */ #define TCPTV_SRTTBASE 0 /* base roundtrip time; if 0, no idea yet */ -#define TCPTV_RTOBASE ( 3*hz) /* assumed RTO if no info */ +#define TCPTV_RTOBASE ( 1*hz) /* assumed RTO if no info */ #define TCPTV_PERSMIN ( 5*hz) /* minimum persist interval */ #define TCPTV_PERSMAX ( 60*hz) /* maximum persist interval */ _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
