1 /*- 2 * Copyright (c) 1989 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * %sccs.include.redist.c% 6 */ 7 8 #if defined(LIBC_SCCS) && !defined(lint) 9 static char sccsid[] = "@(#)getloadavg.c 6.6 (Berkeley) 04/27/93"; 10 #endif /* LIBC_SCCS and not lint */ 11 12 #include <sys/param.h> 13 #include <sys/time.h> 14 #include <sys/resource.h> 15 #include <sys/sysctl.h> 16 #include <vm/vm_param.h> 17 18 #include <stdlib.h> 19 20 /* 21 * getloadavg() -- Get system load averages. 22 * 23 * Put `nelem' samples into `loadavg' array. 24 * Return number of samples retrieved, or -1 on error. 25 */ 26 int 27 getloadavg(loadavg, nelem) 28 double loadavg[]; 29 int nelem; 30 { 31 struct loadavg loadinfo; 32 int size, i, mib[2]; 33 34 mib[0] = CTL_VM; 35 mib[1] = VM_LOADAVG; 36 size = sizeof(loadinfo); 37 if (sysctl(mib, 2, &loadinfo, &size, NULL, 0) < 0) 38 return (-1); 39 40 nelem = MIN(nelem, sizeof(loadinfo.ldavg) / sizeof(fixpt_t)); 41 for (i = 0; i < nelem; i++) 42 loadavg[i] = (double) loadinfo.ldavg[i] / loadinfo.fscale; 43 return (nelem); 44 } 45