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From: lane@CAMIS.STANFORD.EDU (Christopher Lane)
Newsgroups: comp.sys.next
Subject: re: CPU load function?
Message-ID: <MailManager.671127103.1575.lane@ssrg-next-1>
Date: 8 Apr 91 16:11:43 GMT
References: <1991Apr8.063438.8964@engin.umich.edu>
Sender: Christopher Lane <lane@ssrg-next-1.stanford.edu>
Organization: Internet-USENET Gateway at Stanford University
Lines: 40

> I'm looking for a C or Mach function that will get me the percent
> usage/load of the CPU at any one time. If anyone knows of such a
> beastie, please email me (or post it I guess).

The function you probably want is 'table'.  An example usage from LoadAve.c
which is part of the NLoad application:

/* 'table()' version of 'loadave()' suggested by Morris Meyer */

#import <c.h>
#import <sys/table.h>

#define QUEUES 3

extern int table();

int loadave(long vector[QUEUES])
{
    struct tbl_loadavg tl;
    int i;

    if(table(TBL_LOADAVG, 0, &tl, 1, sizeof(tl)) == CERROR) return(CERROR);

    if(tl.tl_lscale == 0) return(CERROR);

    for (i = 0; i < QUEUES; i++) vector[i] = tl.tl_avenrun[i];

    return(tl.tl_lscale);
}


>I need it (or something like it) to implement a NeXTstep version of a nifty
>thing I've seen called xload on Suns here at Michigan....

Already been done, I'm afraid.  It's called 'NLoad' and I promise to have a
finished working version for 2.0 on the NeXT archives 'real soon now'.

- Christopher

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