/* * Copyright (c) 1982, 1986, 1989, 1993 * The Regents of the University of California. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * @(#)vm_meter.c 8.4 (Berkeley) 1/4/94 * $FreeBSD: head/sys/vm/vm_meter.c 21673 1997-01-14 07:20:47Z jkh $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct loadavg averunnable = { {0, 0, 0}, FSCALE }; /* load average, of runnable procs */ struct vmmeter cnt; static int maxslp = MAXSLP; /* * Constants for averages over 1, 5, and 15 minutes * when sampling at 5 second intervals. */ static fixpt_t cexp[3] = { 0.9200444146293232 * FSCALE, /* exp(-1/12) */ 0.9834714538216174 * FSCALE, /* exp(-1/60) */ 0.9944598480048967 * FSCALE, /* exp(-1/180) */ }; /* * Compute a tenex style load average of a quantity on * 1, 5 and 15 minute intervals. */ static void loadav(struct loadavg *avg) { register int i, nrun; register struct proc *p; for (nrun = 0, p = allproc.lh_first; p != 0; p = p->p_list.le_next) { switch (p->p_stat) { case SSLEEP: if (p->p_priority > PZERO || p->p_slptime != 0) continue; /* fall through */ case SRUN: case SIDL: nrun++; } } for (i = 0; i < 3; i++) avg->ldavg[i] = (cexp[i] * avg->ldavg[i] + nrun * FSCALE * (FSCALE - cexp[i])) >> FSHIFT; } void vmmeter() { if (time.tv_sec % 5 == 0) loadav(&averunnable); if (proc0.p_slptime > maxslp / 2) wakeup(&proc0); } SYSCTL_INT(_vm, VM_V_FREE_MIN, v_free_min, CTLFLAG_RW, &cnt.v_free_min, 0, ""); SYSCTL_INT(_vm, VM_V_FREE_TARGET, v_free_target, CTLFLAG_RW, &cnt.v_free_target, 0, ""); SYSCTL_INT(_vm, VM_V_FREE_RESERVED, v_free_reserved, CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); SYSCTL_INT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); SYSCTL_INT(_vm, VM_V_CACHE_MIN, v_cache_min, CTLFLAG_RW, &cnt.v_cache_min, 0, ""); SYSCTL_INT(_vm, VM_V_CACHE_MAX, v_cache_max, CTLFLAG_RW, &cnt.v_cache_max, 0, ""); SYSCTL_INT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, &averunnable, loadavg, ""); static int vmtotal SYSCTL_HANDLER_ARGS { struct proc *p; struct vmtotal total, *totalp; vm_map_entry_t entry; vm_object_t object; vm_map_t map; int paging; totalp = &total; bzero(totalp, sizeof *totalp); /* * Mark all objects as inactive. */ for (object = TAILQ_FIRST(&vm_object_list); object != NULL; object = TAILQ_NEXT(object,object_list)) object->flags &= ~OBJ_ACTIVE; /* * Calculate process statistics. */ for (p = allproc.lh_first; p != 0; p = p->p_list.le_next) { if (p->p_flag & P_SYSTEM) continue; switch (p->p_stat) { case 0: continue; case SSLEEP: case SSTOP: if (p->p_flag & P_INMEM) { if (p->p_priority <= PZERO) totalp->t_dw++; else if (p->p_slptime < maxslp) totalp->t_sl++; } else if (p->p_slptime < maxslp) totalp->t_sw++; if (p->p_slptime >= maxslp) continue; break; case SRUN: case SIDL: if (p->p_flag & P_INMEM) totalp->t_rq++; else totalp->t_sw++; if (p->p_stat == SIDL) continue; break; } /* * Note active objects. */ paging = 0; for (map = &p->p_vmspace->vm_map, entry = map->header.next; entry != &map->header; entry = entry->next) { if (entry->is_a_map || entry->is_sub_map || entry->object.vm_object == NULL) continue; entry->object.vm_object->flags |= OBJ_ACTIVE; paging |= entry->object.vm_object->paging_in_progress; } if (paging) totalp->t_pw++; } /* * Calculate object memory usage statistics. */ for (object = TAILQ_FIRST(&vm_object_list); object != NULL; object = TAILQ_NEXT(object, object_list)) { totalp->t_vm += object->size; totalp->t_rm += object->resident_page_count; if (object->flags & OBJ_ACTIVE) { totalp->t_avm += object->size; totalp->t_arm += object->resident_page_count; } if (object->shadow_count > 1) { /* shared object */ totalp->t_vmshr += object->size; totalp->t_rmshr += object->resident_page_count; if (object->flags & OBJ_ACTIVE) { totalp->t_avmshr += object->size; totalp->t_armshr += object->resident_page_count; } } } totalp->t_free = cnt.v_free_count + cnt.v_cache_count; return (sysctl_handle_opaque(oidp, totalp, sizeof total, req)); } SYSCTL_PROC(_vm, VM_METER, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD, 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", "");