Current Path : /sys/vm/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
Current File : //sys/vm/vm_meter.c |
/*- * 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. * 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 */ #include <sys/cdefs.h> __FBSDID("$FreeBSD: release/9.1.0/sys/vm/vm_meter.c 219968 2011-03-24 18:40:11Z jhb $"); #include <sys/param.h> #include <sys/systm.h> #include <sys/kernel.h> #include <sys/lock.h> #include <sys/mutex.h> #include <sys/proc.h> #include <sys/resource.h> #include <sys/sx.h> #include <sys/vmmeter.h> #include <sys/smp.h> #include <vm/vm.h> #include <vm/vm_page.h> #include <vm/vm_extern.h> #include <vm/vm_param.h> #include <vm/pmap.h> #include <vm/vm_map.h> #include <vm/vm_object.h> #include <sys/sysctl.h> struct vmmeter cnt; SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min, CTLFLAG_RW, &cnt.v_free_min, 0, ""); SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target, CTLFLAG_RW, &cnt.v_free_target, 0, ""); SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved, CTLFLAG_RW, &cnt.v_free_reserved, 0, ""); SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target, CTLFLAG_RW, &cnt.v_inactive_target, 0, ""); SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min, CTLFLAG_RW, &cnt.v_cache_min, 0, ""); SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max, CTLFLAG_RW, &cnt.v_cache_max, 0, ""); SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min, CTLFLAG_RW, &cnt.v_pageout_free_min, 0, ""); SYSCTL_UINT(_vm, OID_AUTO, v_free_severe, CTLFLAG_RW, &cnt.v_free_severe, 0, ""); static int sysctl_vm_loadavg(SYSCTL_HANDLER_ARGS) { #ifdef SCTL_MASK32 u_int32_t la[4]; if (req->flags & SCTL_MASK32) { la[0] = averunnable.ldavg[0]; la[1] = averunnable.ldavg[1]; la[2] = averunnable.ldavg[2]; la[3] = averunnable.fscale; return SYSCTL_OUT(req, la, sizeof(la)); } else #endif return SYSCTL_OUT(req, &averunnable, sizeof(averunnable)); } SYSCTL_PROC(_vm, VM_LOADAVG, loadavg, CTLTYPE_STRUCT | CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, 0, sysctl_vm_loadavg, "S,loadavg", "Machine loadaverage history"); static int vmtotal(SYSCTL_HANDLER_ARGS) { struct proc *p; struct vmtotal total; vm_map_entry_t entry; vm_object_t object; vm_map_t map; int paging; struct thread *td; struct vmspace *vm; bzero(&total, sizeof(total)); /* * Mark all objects as inactive. */ mtx_lock(&vm_object_list_mtx); TAILQ_FOREACH(object, &vm_object_list, object_list) { if (!VM_OBJECT_TRYLOCK(object)) { /* * Avoid a lock-order reversal. Consequently, * the reported number of active pages may be * greater than the actual number. */ continue; } vm_object_clear_flag(object, OBJ_ACTIVE); VM_OBJECT_UNLOCK(object); } mtx_unlock(&vm_object_list_mtx); /* * Calculate process statistics. */ sx_slock(&allproc_lock); FOREACH_PROC_IN_SYSTEM(p) { if (p->p_flag & P_SYSTEM) continue; PROC_LOCK(p); switch (p->p_state) { case PRS_NEW: PROC_UNLOCK(p); continue; break; default: FOREACH_THREAD_IN_PROC(p, td) { thread_lock(td); switch (td->td_state) { case TDS_INHIBITED: if (TD_IS_SWAPPED(td)) total.t_sw++; else if (TD_IS_SLEEPING(td) && td->td_priority <= PZERO) total.t_dw++; else total.t_sl++; break; case TDS_CAN_RUN: total.t_sw++; break; case TDS_RUNQ: case TDS_RUNNING: total.t_rq++; thread_unlock(td); continue; default: break; } thread_unlock(td); } } PROC_UNLOCK(p); /* * Note active objects. */ paging = 0; vm = vmspace_acquire_ref(p); if (vm == NULL) continue; map = &vm->vm_map; vm_map_lock_read(map); for (entry = map->header.next; entry != &map->header; entry = entry->next) { if ((entry->eflags & MAP_ENTRY_IS_SUB_MAP) || (object = entry->object.vm_object) == NULL) continue; VM_OBJECT_LOCK(object); vm_object_set_flag(object, OBJ_ACTIVE); paging |= object->paging_in_progress; VM_OBJECT_UNLOCK(object); } vm_map_unlock_read(map); vmspace_free(vm); if (paging) total.t_pw++; } sx_sunlock(&allproc_lock); /* * Calculate object memory usage statistics. */ mtx_lock(&vm_object_list_mtx); TAILQ_FOREACH(object, &vm_object_list, object_list) { /* * Perform unsynchronized reads on the object to avoid * a lock-order reversal. In this case, the lack of * synchronization should not impair the accuracy of * the reported statistics. */ if (object->type == OBJT_DEVICE || object->type == OBJT_SG) { /* * Devices, like /dev/mem, will badly skew our totals. */ continue; } if (object->ref_count == 0) { /* * Also skip unreferenced objects, including * vnodes representing mounted file systems. */ continue; } total.t_vm += object->size; total.t_rm += object->resident_page_count; if (object->flags & OBJ_ACTIVE) { total.t_avm += object->size; total.t_arm += object->resident_page_count; } if (object->shadow_count > 1) { /* shared object */ total.t_vmshr += object->size; total.t_rmshr += object->resident_page_count; if (object->flags & OBJ_ACTIVE) { total.t_avmshr += object->size; total.t_armshr += object->resident_page_count; } } } mtx_unlock(&vm_object_list_mtx); total.t_free = cnt.v_free_count + cnt.v_cache_count; return (sysctl_handle_opaque(oidp, &total, sizeof(total), req)); } /* * vcnt() - accumulate statistics from all cpus and the global cnt * structure. * * The vmmeter structure is now per-cpu as well as global. Those * statistics which can be kept on a per-cpu basis (to avoid cache * stalls between cpus) can be moved to the per-cpu vmmeter. Remaining * statistics, such as v_free_reserved, are left in the global * structure. * * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req) */ static int vcnt(SYSCTL_HANDLER_ARGS) { int count = *(int *)arg1; int offset = (char *)arg1 - (char *)&cnt; int i; CPU_FOREACH(i) { struct pcpu *pcpu = pcpu_find(i); count += *(int *)((char *)&pcpu->pc_cnt + offset); } return (SYSCTL_OUT(req, &count, sizeof(int))); } SYSCTL_PROC(_vm, VM_TOTAL, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD|CTLFLAG_MPSAFE, 0, sizeof(struct vmtotal), vmtotal, "S,vmtotal", "System virtual memory statistics"); SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats"); static SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats"); static SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats"); SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats"); SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_swtch, 0, vcnt, "IU", "Context switches"); SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_trap, 0, vcnt, "IU", "Traps"); SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_syscall, 0, vcnt, "IU", "Syscalls"); SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_intr, 0, vcnt, "IU", "Hardware interrupts"); SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_soft, 0, vcnt, "IU", "Software interrupts"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_vm_faults, 0, vcnt, "IU", "VM faults"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_cow_faults, 0, vcnt, "IU", "COW faults"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_cow_optim, 0, vcnt, "IU", "Optimized COW faults"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_zfod, 0, vcnt, "IU", "Zero fill"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_ozfod, 0, vcnt, "IU", "Optimized zero fill"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_swapin, 0, vcnt, "IU", "Swapin operations"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_swapout, 0, vcnt, "IU", "Swapout operations"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_swappgsin, 0, vcnt, "IU", "Swapin pages"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_swappgsout, 0, vcnt, "IU", "Swapout pages"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_vnodein, 0, vcnt, "IU", "Vnodein operations"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_vnodeout, 0, vcnt, "IU", "Vnodeout operations"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_vnodepgsin, 0, vcnt, "IU", "Vnodein pages"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_vnodepgsout, 0, vcnt, "IU", "Vnodeout pages"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_intrans, 0, vcnt, "IU", "In transit page blocking"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_reactivated, 0, vcnt, "IU", "Reactivated pages"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_pdwakeups, 0, vcnt, "IU", "Pagedaemon wakeups"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_pdpages, 0, vcnt, "IU", "Pagedaemon page scans"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tcached, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_tcached, 0, vcnt, "IU", "Total pages cached"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_dfree, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_pfree, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_tfree, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_size, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_page_size, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_page_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_page_count, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_reserved, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_free_reserved, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_target, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_free_target, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_free_min, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_free_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_free_count, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_wire_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_wire_count, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_active_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_active_count, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_target, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_inactive_target, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_inactive_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_inactive_count, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_count, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_cache_count, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_cache_min, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cache_max, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_cache_max, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pageout_free_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_pageout_free_min, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_interrupt_free_min, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_interrupt_free_min, 0, vcnt, "IU", ""); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_forks, 0, vcnt, "IU", "Number of fork() calls"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_vforks, 0, vcnt, "IU", "Number of vfork() calls"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_rforks, 0, vcnt, "IU", "Number of rfork() calls"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_kthreads, 0, vcnt, "IU", "Number of fork() calls by kernel"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_forkpages, 0, vcnt, "IU", "VM pages affected by fork()"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_vforkpages, 0, vcnt, "IU", "VM pages affected by vfork()"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_rforkpages, 0, vcnt, "IU", "VM pages affected by rfork()"); SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD|CTLFLAG_MPSAFE, &cnt.v_kthreadpages, 0, vcnt, "IU", "VM pages affected by fork() by kernel"); SYSCTL_INT(_vm_stats_misc, OID_AUTO, zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0, "");