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A couple of changes of mine that I've been using for a while:

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route.c: look up the netname as-is first before the shifted name. this
         makes a big speed difference, as the lookups are generally local
	 DNS.  The shifted names can be very wrong (there is still guessing
	 and fudging involved) and usually go remote, taking a long time
	 to fail.  If you have the RFC reccomended netnames in your reverse
	 lookups, this is even faster still.
main.c:  dont do a sethostent(1) - this is causing the resolver to use a
	 VC (tcp) connection to the resolver, which has more overheads and
	 is slower than the default UDP case.  This once made sense when
	 everything was based on text host tables.
This commit is contained in:
Peter Wemm 1996-01-14 23:42:19 +00:00
parent 05ddff6e30
commit cc63cd5663
2 changed files with 11 additions and 3 deletions
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8
usr.bin/netstat/main.c
View File

@ -364,12 +364,20 @@ main(argc, argv)
printf("%s: no stats routine\n", tp->pr_name);
exit(0);
}
#if 0
/*
* Keep file descriptors open to avoid overhead
* of open/close on each call to get* routines.
*/
sethostent(1);
setnetent(1);
#else
/*
* This does not make sense any more with DNS being default over
* the files. Doing a setXXXXent(1) causes a tcp connection to be
* used for the queries, which is slower.
*/
#endif
if (iflag) {
intpr(interval, nl[N_IFNET].n_value);
exit(0);

6
usr.bin/netstat/route.c
View File

@ -36,7 +36,7 @@
static char sccsid[] = "From: @(#)route.c 8.6 (Berkeley) 4/28/95";
#endif
static const char rcsid[] =
"$Id: route.c,v 1.8 1995/12/05 07:29:15 julian Exp $";
"$Id: route.c,v 1.9 1996/01/14 23:33:13 peter Exp $";
#endif /* not lint */
#include <sys/param.h>
@ -662,8 +662,8 @@ netname(in, mask)
net = i & mask;
while ((mask & 1) == 0)
mask >>= 1, net >>= 1;
if (!(np = getnetbyaddr(net, AF_INET)))
np = getnetbyaddr(i, AF_INET);
if (!(np = getnetbyaddr(i, AF_INET)))
np = getnetbyaddr(net, AF_INET);
if (np)
cp = np->n_name;
}