Aren
/
NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Turn on TCP_NODELAY on the remote tape socket, from FreeBSD. Here is the 

commit message from Bill Fenner:

Turn on TCP_NODELAY on the remote socket, to turn off sender silly window
 syndrome avoidance.  The combination of SWS avoidance and ack-every-other
 causes low throughput if the block size divided by the MSS is odd (which
 is true with the default block size and MSS).
Turning on TCP_NODELAY disables the Nagle algorithm and sender SWS avoidance.
 The rdump request/response protocol can not invoke Nagle and cannot cause
 SWS, so this has no negative effects.

Also, put back the code that sets the TOS to "throughput", which seems to
have been erroneously removed during the Lite-2 merge.
This commit is contained in:
thorpej 1998-07-30 18:14:00 +00:00
parent b7a585b61d
commit ae36dbe3f7
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
sbin/dump/dumprmt.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: dumprmt.c,v 1.20 1998/03/30 01:54:40 mrg Exp $ */
/* $NetBSD: dumprmt.c,v 1.21 1998/07/30 18:14:00 thorpej Exp $ */
/*-
* Copyright (c) 1980, 1993
@ -38,7 +38,7 @@
#if 0
static char sccsid[] = "@(#)dumprmt.c 8.3 (Berkeley) 4/28/95";
#else
__RCSID("$NetBSD: dumprmt.c,v 1.20 1998/03/30 01:54:40 mrg Exp $");
__RCSID("$NetBSD: dumprmt.c,v 1.21 1998/07/30 18:14:00 thorpej Exp $");
#endif
#endif /* not lint */
@ -58,6 +58,7 @@ __RCSID("$NetBSD: dumprmt.c,v 1.20 1998/03/30 01:54:40 mrg Exp $");
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <protocols/dumprestore.h>
@ -132,11 +133,8 @@ rmtgetconn()
char *cp;
static struct servent *sp = NULL;
static struct passwd *pwd = NULL;
#ifdef notdef
static int on = 1;
#endif
char *tuser, *name;
int size;
int size, opt;
if (sp == NULL) {
sp = getservbyname("shell", "tcp");
@ -172,6 +170,12 @@ rmtgetconn()
setsockopt(rmtape, SOL_SOCKET, SO_SNDBUF, &size, sizeof (size)) < 0)
size -= TP_BSIZE;
(void)setsockopt(rmtape, SOL_SOCKET, SO_RCVBUF, &size, sizeof (size));
opt = IPTOS_THROUGHPUT;
(void)setsockopt(rmtape, IPPROTO_IP, IP_TOS, &opt, sizeof (opt));
opt = 1;
(void)setsockopt(rmtape, IPPROTO_TCP, TCP_NODELAY, &opt, sizeof (opt));
}
static int