projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| b688fc87 WJ |
1 | /* |
| 2 | * Copyright (c) 1982, 1986, 1989 Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * Redistribution and use in source and binary forms, with or without | |
| 6 | * modification, are permitted provided that the following conditions | |
| 7 | * are met: | |
| 8 | * 1. Redistributions of source code must retain the above copyright | |
| 9 | * notice, this list of conditions and the following disclaimer. | |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 11 | * notice, this list of conditions and the following disclaimer in the | |
| 12 | * documentation and/or other materials provided with the distribution. | |
| 13 | * 3. All advertising materials mentioning features or use of this software | |
| 14 | * must display the following acknowledgement: | |
| 15 | * This product includes software developed by the University of | |
| 16 | * California, Berkeley and its contributors. | |
| 17 | * 4. Neither the name of the University nor the names of its contributors | |
| 18 | * may be used to endorse or promote products derived from this software | |
| 19 | * without specific prior written permission. | |
| 20 | * | |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 31 | * SUCH DAMAGE. | |
| 32 | * | |
| 33 | * @(#)vm_meter.c 7.11 (Berkeley) 4/20/91 | |
| 34 | */ | |
| 35 | ||
| 36 | #include "param.h" | |
| 37 | #include "proc.h" | |
| 38 | #include "systm.h" | |
| 39 | #include "kernel.h" | |
| 40 | ||
| 41 | #include "vm_param.h" | |
| 42 | #include "vmmeter.h" | |
| 43 | ||
| 44 | fixpt_t averunnable[3]; /* load average, of runnable procs */ | |
| 45 | ||
| 46 | int maxslp = MAXSLP; | |
| 47 | int saferss = SAFERSS; | |
| 48 | ||
| 49 | ||
| 50 | vmmeter() | |
| 51 | { | |
| 52 | register unsigned *cp, *rp, *sp; | |
| 53 | ||
| 54 | if (time.tv_sec % 5 == 0) | |
| 55 | vmtotal(); | |
| 56 | if (proc0.p_slptime > maxslp/2) | |
| 57 | wakeup((caddr_t)&proc0); | |
| 58 | } | |
| 59 | ||
| 60 | vmtotal() | |
| 61 | { | |
| 62 | register struct proc *p; | |
| 63 | int nrun = 0; | |
| 64 | ||
| 65 | total.t_vm = 0; | |
| 66 | total.t_avm = 0; | |
| 67 | total.t_rm = 0; | |
| 68 | total.t_arm = 0; | |
| 69 | total.t_rq = 0; | |
| 70 | total.t_dw = 0; | |
| 71 | total.t_pw = 0; | |
| 72 | total.t_sl = 0; | |
| 73 | total.t_sw = 0; | |
| 74 | for (p = allproc; p != NULL; p = p->p_nxt) { | |
| 75 | if (p->p_flag & SSYS) | |
| 76 | continue; | |
| 77 | if (p->p_stat) { | |
| 78 | switch (p->p_stat) { | |
| 79 | ||
| 80 | case SSLEEP: | |
| 81 | if (p->p_pri <= PZERO && p->p_slptime == 0) | |
| 82 | nrun++; | |
| 83 | /* fall through */ | |
| 84 | case SSTOP: | |
| 85 | #ifdef notdef | |
| 86 | if (p->p_flag & SPAGE) | |
| 87 | total.t_pw++; | |
| 88 | else | |
| 89 | #endif | |
| 90 | if (p->p_flag & SLOAD) { | |
| 91 | if (p->p_pri <= PZERO) | |
| 92 | total.t_dw++; | |
| 93 | else if (p->p_slptime < maxslp) | |
| 94 | total.t_sl++; | |
| 95 | } else if (p->p_slptime < maxslp) | |
| 96 | total.t_sw++; | |
| 97 | if (p->p_slptime < maxslp) | |
| 98 | goto active; | |
| 99 | break; | |
| 100 | ||
| 101 | case SRUN: | |
| 102 | case SIDL: | |
| 103 | nrun++; | |
| 104 | if (p->p_flag & SLOAD) | |
| 105 | total.t_rq++; | |
| 106 | else | |
| 107 | total.t_sw++; | |
| 108 | active: | |
| 109 | break; | |
| 110 | } | |
| 111 | } | |
| 112 | } | |
| 113 | loadav(averunnable, nrun); | |
| 114 | } | |
| 115 | ||
| 116 | /* | |
| 117 | * Constants for averages over 1, 5, and 15 minutes | |
| 118 | * when sampling at 5 second intervals. | |
| 119 | */ | |
| 120 | fixpt_t cexp[3] = { | |
| 121 | 0.9200444146293232 * FSCALE, /* exp(-1/12) */ | |
| 122 | 0.9834714538216174 * FSCALE, /* exp(-1/60) */ | |
| 123 | 0.9944598480048967 * FSCALE, /* exp(-1/180) */ | |
| 124 | }; | |
| 125 | ||
| 126 | /* | |
| 127 | * Compute a tenex style load average of a quantity on | |
| 128 | * 1, 5 and 15 minute intervals. | |
| 129 | */ | |
| 130 | loadav(avg, n) | |
| 131 | register fixpt_t *avg; | |
| 132 | int n; | |
| 133 | { | |
| 134 | register int i; | |
| 135 | ||
| 136 | for (i = 0; i < 3; i++) | |
| 137 | avg[i] = (cexp[i] * avg[i] + n * FSCALE * (FSCALE - cexp[i])) | |
| 138 | >> FSHIFT; | |
| 139 | #if defined(COMPAT_43) && (defined(vax) || defined(tahoe)) | |
| 140 | for (i = 0; i < 3; i++) | |
| 141 | avenrun[i] = (double) averunnable[i] / FSCALE; | |
| 142 | #endif /* COMPAT_43 */ | |
| 143 | } |