macomber@thoreau.nsc.com (Robert Macomber) (03/03/90)
I'm having trouble extracting average load statistics on a DS3100. It's a loaner machine running ULTRIX (version 3.0, I think). I've tried compiling the "stats" remote statistics server and the "top" performance monitor, but both come up with zero values for the avenrun variables. There must be some way, because "xload" seems to work okay. If some kind soul knows the answer (or better yet has a working version of rstatd) I'd be grateful to learn about it. Thanks in Advance. -- Robert L. Macomber National Semiconductor South Portland, Maine macomber@thoreau.nsc.com
alan@shodha.dec.com ( Alan's Home for Wayward Notes File.) (03/03/90)
In article <33@thoreau.nsc.com>, macomber@thoreau.nsc.com (Robert Macomber) writes: > > I'm having trouble extracting average load statistics on a DS3100. > It's a loaner machine running ULTRIX (version 3.0, I think). > I've tried compiling the "stats" remote statistics server and the "top" > performance monitor, but both come up with zero values for the avenrun > variables. There must be some way, because "xload" seems to work > okay. The load average is stored in a data structure called "avenrun" (you probably already know this). On a VAX system type of avenrun is double. On the DECstation it is type "fix". There is an include file you'll be interested in called <sys/fixpoint.h>. To convert fix to double use FIX_TO_DBL(). > > Thanks in Advance. You're welcome. > -- > Robert L. Macomber -- Alan Rollow alan@nabeth.enet.dec.com
bin@primate.wisc.edu (Brain in Neutral) (03/04/90)
Something I have used to get load average out of a MIPS M/120. Might
be useful on a DECstation as well... strip out the irrelevant junk...
/*
RISC/os 4.0 version
xloadback - back end for xload for machines with no X server.
Just sends load average to stdout every now and then. Should
attach over network to xloadfront process on machine with X
server that reads it and displays it a la regular xload.
Sends the load*100 as a 32-bit quantity in network byte order.
12 July 1989 Paul DuBois dubois@rhesus.primate.wisc.edu
*/
# include <stdio.h>
# include <nlist.h>
# include <sys/fixpoint.h>
# include <sys/file.h>
# define UNIX "/unix"
# define KMEM_FILE "/dev/kmem"
# define KMEM_ERROR "cannot open /dev/kmem"
# define LOADAV 0
struct nlist namelist[] = { /* namelist for vmunix grubbing */
{"avenrun"},
{0}
};
char hostname[256];
main ()
{
register int kmem; /* kmem pointer */
long lavgSeek; /* offset to load average in kmem */
ufix tmpLoad; /* system load info */
long iLoad;
if (gethostname (hostname, sizeof (hostname)))
smerror ("don't know hostname");
/* Get name list. Then open kmem so we can seek for information */
nlist(UNIX, namelist);
if (namelist[LOADAV].n_type == 0)
smerror("cannot get name list");
lavgSeek = namelist[LOADAV].n_value;
kmem = open(KMEM_FILE, O_RDONLY);
if (kmem < 0)
smerror(KMEM_ERROR);
write (1, hostname, strlen (hostname) + 1);
for (;;)
{
sleep (5);
lseek(kmem, lavgSeek, 0);
read(kmem, (char *) &tmpLoad, sizeof (tmpLoad));
iLoad = (long) (FIX_TO_DBL (tmpLoad) * 100.0);
iLoad = htonl (iLoad);
printf ("%d %d %g\n", iLoad, ntohl (iLoad), FIX_TO_DBL (tmpLoad));
/*write(1, (char *) &iLoad, sizeof (iLoad));*/
fflush (stdout);
}
}
/* Diagnostic printer - Print message and exit */
smerror(message)
char *message;
{
fprintf (stderr, "%s\n", message);
exit(1);
}litwack@dccs.upenn.edu (Mark Litwack) (03/07/90)
jim@mango.miami.edu (jim brown) just posted patches for top on comp.sources.bugs that fixes the problems on the DS3100. -mark