The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/vm/vm_meter.c

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    1 /*
    2  * (MPSAFE)
    3  *
    4  * Copyright (c) 1982, 1986, 1989, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)vm_meter.c  8.4 (Berkeley) 1/4/94
   32  * $FreeBSD: src/sys/vm/vm_meter.c,v 1.34.2.7 2002/10/10 19:28:22 dillon Exp $
   33  * $DragonFly: src/sys/vm/vm_meter.c,v 1.15 2008/04/28 18:04:08 dillon Exp $
   34  */
   35 
   36 #include <sys/param.h>
   37 #include <sys/proc.h>
   38 #include <sys/systm.h>
   39 #include <sys/kernel.h>
   40 #include <sys/resource.h>
   41 #include <sys/vmmeter.h>
   42 
   43 #include <vm/vm.h>
   44 #include <vm/vm_page.h>
   45 #include <vm/vm_extern.h>
   46 #include <vm/vm_param.h>
   47 #include <sys/lock.h>
   48 #include <vm/pmap.h>
   49 #include <vm/vm_map.h>
   50 #include <vm/vm_object.h>
   51 #include <sys/sysctl.h>
   52 
   53 struct vmstats vmstats;
   54 
   55 static int maxslp = MAXSLP;
   56 
   57 SYSCTL_UINT(_vm, VM_V_FREE_MIN, v_free_min,
   58         CTLFLAG_RW, &vmstats.v_free_min, 0,
   59         "Minimum number of pages desired free");
   60 SYSCTL_UINT(_vm, VM_V_FREE_TARGET, v_free_target,
   61         CTLFLAG_RW, &vmstats.v_free_target, 0,
   62         "Number of pages desired free");
   63 SYSCTL_UINT(_vm, VM_V_FREE_RESERVED, v_free_reserved,
   64         CTLFLAG_RW, &vmstats.v_free_reserved, 0,
   65         "Number of pages reserved for deadlock");
   66 SYSCTL_UINT(_vm, VM_V_INACTIVE_TARGET, v_inactive_target,
   67         CTLFLAG_RW, &vmstats.v_inactive_target, 0,
   68         "Number of pages desired inactive");
   69 SYSCTL_UINT(_vm, VM_V_CACHE_MIN, v_cache_min,
   70         CTLFLAG_RW, &vmstats.v_cache_min, 0,
   71         "Min number of pages desired on cache queue");
   72 SYSCTL_UINT(_vm, VM_V_CACHE_MAX, v_cache_max,
   73         CTLFLAG_RW, &vmstats.v_cache_max, 0,
   74         "Max number of pages in cached obj");
   75 SYSCTL_UINT(_vm, VM_V_PAGEOUT_FREE_MIN, v_pageout_free_min,
   76         CTLFLAG_RW, &vmstats.v_pageout_free_min, 0,
   77         "Min number pages reserved for kernel");
   78 SYSCTL_UINT(_vm, OID_AUTO, v_free_severe,
   79         CTLFLAG_RW, &vmstats.v_free_severe, 0, "");
   80 
   81 SYSCTL_STRUCT(_vm, VM_LOADAVG, loadavg, CTLFLAG_RD, 
   82     &averunnable, loadavg, "Machine loadaverage history");
   83 
   84 static int do_vmtotal_callback(struct proc *p, void *data);
   85 
   86 /*
   87  * No requirements.
   88  */
   89 static int
   90 do_vmtotal(SYSCTL_HANDLER_ARGS)
   91 {
   92         struct vmtotal total;
   93         globaldata_t gd;
   94         int n;
   95 
   96         bzero(&total, sizeof(total));
   97         for (n = 0; n < ncpus; ++n) {
   98                 gd = globaldata_find(n);
   99 
  100                 /* total.t_rq calculated separately */
  101                 /* total.t_dw calculated separately */
  102                 /* total.t_pw calculated separately */
  103                 /* total.t_sl calculated separately */
  104                 /* total.t_sw calculated separately */
  105                 total.t_vm += gd->gd_vmtotal.t_vm;
  106                 total.t_avm += gd->gd_vmtotal.t_avm;
  107                 total.t_rm += gd->gd_vmtotal.t_rm;
  108                 total.t_arm += gd->gd_vmtotal.t_arm;
  109                 total.t_vmshr += gd->gd_vmtotal.t_vmshr;
  110                 total.t_avmshr += gd->gd_vmtotal.t_avmshr;
  111                 total.t_rmshr += gd->gd_vmtotal.t_rmshr;
  112                 total.t_armshr += gd->gd_vmtotal.t_armshr;
  113                 /* total.t_free calculated separately */
  114         }
  115 
  116         /*
  117          * Calculate process statistics.
  118          */
  119         allproc_scan(do_vmtotal_callback, &total);
  120 
  121         /*
  122          * Adjust for sysctl return.  Add real memory into virtual memory.
  123          * Set t_free.
  124          *
  125          * t_rm - Real memory
  126          * t_vm - Virtual memory (real + swap)
  127          */
  128         total.t_vm += total.t_rm;
  129         total.t_free = vmstats.v_free_count + vmstats.v_cache_count;
  130 
  131         return (sysctl_handle_opaque(oidp, &total, sizeof(total), req));
  132 }
  133 
  134 static int
  135 do_vmtotal_callback(struct proc *p, void *data)
  136 {
  137         struct vmtotal *totalp = data;
  138         struct lwp *lp;
  139 
  140         if (p->p_flags & P_SYSTEM)
  141                 return(0);
  142 
  143         lwkt_gettoken(&p->p_token);
  144 
  145         FOREACH_LWP_IN_PROC(lp, p) {
  146                 switch (lp->lwp_stat) {
  147                 case LSSTOP:
  148                 case LSSLEEP:
  149                         if ((p->p_flags & P_SWAPPEDOUT) == 0) {
  150                                 if ((lp->lwp_flags & LWP_SINTR) == 0)
  151                                         totalp->t_dw++;
  152                                 else if (lp->lwp_slptime < maxslp)
  153                                         totalp->t_sl++;
  154                         } else if (lp->lwp_slptime < maxslp) {
  155                                 totalp->t_sw++;
  156                         }
  157                         if (lp->lwp_slptime >= maxslp)
  158                                 goto out;
  159                         break;
  160 
  161                 case LSRUN:
  162                         if (p->p_flags & P_SWAPPEDOUT)
  163                                 totalp->t_sw++;
  164                         else
  165                                 totalp->t_rq++;
  166                         if (p->p_stat == SIDL)
  167                                 goto out;
  168                         break;
  169 
  170                 default:
  171                         goto out;
  172                 }
  173 
  174                 /*
  175                  * Set while in vm_fault()
  176                  */
  177                 if (lp->lwp_flags & LWP_PAGING)
  178                         totalp->t_pw++;
  179         }
  180 out:
  181         lwkt_reltoken(&p->p_token);
  182         return(0);
  183 }
  184 
  185 /*
  186  * No requirements.
  187  */
  188 static int
  189 do_vmstats(SYSCTL_HANDLER_ARGS)
  190 {
  191         struct vmstats vms = vmstats;
  192         return (sysctl_handle_opaque(oidp, &vms, sizeof(vms), req));
  193 }
  194 
  195 /*
  196  * No requirements.
  197  */
  198 static int
  199 do_vmmeter(SYSCTL_HANDLER_ARGS)
  200 {
  201         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
  202         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
  203         struct vmmeter vmm;
  204         int i;
  205 
  206         bzero(&vmm, sizeof(vmm));
  207         for (i = 0; i < ncpus; ++i) {
  208                 int off;
  209                 struct globaldata *gd = globaldata_find(i);
  210 
  211                 for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
  212                         *(u_int *)((char *)&vmm + off) +=
  213                                 *(u_int *)((char *)&gd->gd_cnt + off);
  214                 }
  215                 
  216         }
  217         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
  218         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
  219 }
  220 
  221 /*
  222  * vcnt() -     accumulate statistics from the cnt structure for each cpu
  223  *
  224  *      The vmmeter structure is now per-cpu as well as global.  Those
  225  *      statistics which can be kept on a per-cpu basis (to avoid cache
  226  *      stalls between cpus) can be moved to the per-cpu vmmeter.  Remaining
  227  *      statistics, such as v_free_reserved, are left in the global
  228  *      structure.
  229  *
  230  * (sysctl_oid *oidp, void *arg1, int arg2, struct sysctl_req *req)
  231  *
  232  * No requirements.
  233  */
  234 static int
  235 vcnt(SYSCTL_HANDLER_ARGS)
  236 {
  237         int i;
  238         int count = 0;
  239         int offset = arg2;
  240 
  241         for (i = 0; i < ncpus; ++i) {
  242                 struct globaldata *gd = globaldata_find(i);
  243                 count += *(int *)((char *)&gd->gd_cnt + offset);
  244         }
  245         return(SYSCTL_OUT(req, &count, sizeof(int)));
  246 }
  247 
  248 /*
  249  * No requirements.
  250  */
  251 static int
  252 vcnt_intr(SYSCTL_HANDLER_ARGS)
  253 {
  254         int i;
  255         int count = 0;
  256 
  257         for (i = 0; i < ncpus; ++i) {
  258                 struct globaldata *gd = globaldata_find(i);
  259 
  260                 count += gd->gd_cnt.v_intr + gd->gd_cnt.v_ipi +
  261                          gd->gd_cnt.v_timer;
  262         }
  263         return(SYSCTL_OUT(req, &count, sizeof(int)));
  264 }
  265 
  266 #define VMMETEROFF(var) offsetof(struct vmmeter, var)
  267 
  268 SYSCTL_PROC(_vm, OID_AUTO, vmtotal, CTLTYPE_OPAQUE|CTLFLAG_RD,
  269     0, sizeof(struct vmtotal), do_vmtotal, "S,vmtotal", 
  270     "System virtual memory aggregate");
  271 SYSCTL_PROC(_vm, OID_AUTO, vmstats, CTLTYPE_OPAQUE|CTLFLAG_RD,
  272     0, sizeof(struct vmstats), do_vmstats, "S,vmstats", 
  273     "System virtual memory statistics");
  274 SYSCTL_PROC(_vm, OID_AUTO, vmmeter, CTLTYPE_OPAQUE|CTLFLAG_RD,
  275     0, sizeof(struct vmmeter), do_vmmeter, "S,vmmeter", 
  276     "System statistics");
  277 SYSCTL_NODE(_vm, OID_AUTO, stats, CTLFLAG_RW, 0, "VM meter stats");
  278 SYSCTL_NODE(_vm_stats, OID_AUTO, sys, CTLFLAG_RW, 0, "VM meter sys stats");
  279 SYSCTL_NODE(_vm_stats, OID_AUTO, vm, CTLFLAG_RW, 0, "VM meter vm stats");
  280 SYSCTL_NODE(_vm_stats, OID_AUTO, misc, CTLFLAG_RW, 0, "VM meter misc stats");
  281 
  282 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_swtch, CTLTYPE_UINT|CTLFLAG_RD,
  283         0, VMMETEROFF(v_swtch), vcnt, "IU", "Context switches");
  284 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_coll, CTLTYPE_UINT|CTLFLAG_RD,
  285         0, VMMETEROFF(v_intrans_coll), vcnt, "IU", "Intransit map collisions (total)");
  286 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intrans_wait, CTLTYPE_UINT|CTLFLAG_RD,
  287         0, VMMETEROFF(v_intrans_wait), vcnt, "IU", "Intransit map collisions which blocked");
  288 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_ints, CTLTYPE_UINT|CTLFLAG_RD,
  289         0, VMMETEROFF(v_forwarded_ints), vcnt, "IU", "Forwarded interrupts due to MP lock");
  290 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_hits, CTLTYPE_UINT|CTLFLAG_RD,
  291         0, VMMETEROFF(v_forwarded_hits), vcnt, "IU", "Forwarded hits due to MP lock");
  292 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_forwarded_misses, CTLTYPE_UINT|CTLFLAG_RD,
  293         0, VMMETEROFF(v_forwarded_misses), vcnt, "IU", "Forwarded misses due to MP lock");
  294 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_trap, CTLTYPE_UINT|CTLFLAG_RD,
  295         0, VMMETEROFF(v_trap), vcnt, "IU", "Traps");
  296 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_syscall, CTLTYPE_UINT|CTLFLAG_RD,
  297         0, VMMETEROFF(v_syscall), vcnt, "IU", "Syscalls");
  298 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_intr, CTLTYPE_UINT|CTLFLAG_RD,
  299         0, VMMETEROFF(v_intr), vcnt_intr, "IU", "Hardware interrupts");
  300 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_ipi, CTLTYPE_UINT|CTLFLAG_RD,
  301         0, VMMETEROFF(v_ipi), vcnt, "IU", "Inter-processor interrupts");
  302 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_timer, CTLTYPE_UINT|CTLFLAG_RD,
  303         0, VMMETEROFF(v_timer), vcnt, "IU", "LAPIC timer interrupts");
  304 SYSCTL_PROC(_vm_stats_sys, OID_AUTO, v_soft, CTLTYPE_UINT|CTLFLAG_RD,
  305         0, VMMETEROFF(v_soft), vcnt, "IU", "Software interrupts");
  306 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vm_faults, CTLTYPE_UINT|CTLFLAG_RD,
  307         0, VMMETEROFF(v_vm_faults), vcnt, "IU", "VM faults");
  308 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_faults, CTLTYPE_UINT|CTLFLAG_RD,
  309         0, VMMETEROFF(v_cow_faults), vcnt, "IU", "COW faults");
  310 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_cow_optim, CTLTYPE_UINT|CTLFLAG_RD,
  311         0, VMMETEROFF(v_cow_optim), vcnt, "IU", "Optimized COW faults");
  312 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_zfod, CTLTYPE_UINT|CTLFLAG_RD,
  313         0, VMMETEROFF(v_zfod), vcnt, "IU", "Zero fill");
  314 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ozfod, CTLTYPE_UINT|CTLFLAG_RD,
  315         0, VMMETEROFF(v_ozfod), vcnt, "IU", "Optimized zero fill");
  316 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapin, CTLTYPE_UINT|CTLFLAG_RD,
  317         0, VMMETEROFF(v_swapin), vcnt, "IU", "Swapin operations");
  318 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swapout, CTLTYPE_UINT|CTLFLAG_RD,
  319         0, VMMETEROFF(v_swapout), vcnt, "IU", "Swapout operations");
  320 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsin, CTLTYPE_UINT|CTLFLAG_RD,
  321         0, VMMETEROFF(v_swappgsin), vcnt, "IU", "Swapin pages");
  322 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_swappgsout, CTLTYPE_UINT|CTLFLAG_RD,
  323         0, VMMETEROFF(v_swappgsout), vcnt, "IU", "Swapout pages");
  324 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodein, CTLTYPE_UINT|CTLFLAG_RD,
  325         0, VMMETEROFF(v_vnodein), vcnt, "IU", "Vnodein operations");
  326 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodeout, CTLTYPE_UINT|CTLFLAG_RD,
  327         0, VMMETEROFF(v_vnodeout), vcnt, "IU", "Vnodeout operations");
  328 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsin, CTLTYPE_UINT|CTLFLAG_RD,
  329         0, VMMETEROFF(v_vnodepgsin), vcnt, "IU", "Vnodein pages");
  330 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vnodepgsout, CTLTYPE_UINT|CTLFLAG_RD,
  331         0, VMMETEROFF(v_vnodepgsout), vcnt, "IU", "Vnodeout pages");
  332 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_intrans, CTLTYPE_UINT|CTLFLAG_RD,
  333         0, VMMETEROFF(v_intrans), vcnt, "IU", "In transit page blocking");
  334 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_reactivated, CTLTYPE_UINT|CTLFLAG_RD,
  335         0, VMMETEROFF(v_reactivated), vcnt, "IU", "Reactivated pages");
  336 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdwakeups, CTLTYPE_UINT|CTLFLAG_RD,
  337         0, VMMETEROFF(v_pdwakeups), vcnt, "IU", "Pagedaemon wakeups");
  338 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_ppwakeups, CTLTYPE_UINT|CTLFLAG_RD,
  339         0, VMMETEROFF(v_ppwakeups), vcnt, "IU", "vm_wait wakeups");
  340 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pdpages, CTLTYPE_UINT|CTLFLAG_RD,
  341         0, VMMETEROFF(v_pdpages), vcnt, "IU", "Pagedaemon page scans");
  342 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_dfree, CTLTYPE_UINT|CTLFLAG_RD,
  343         0, VMMETEROFF(v_dfree), vcnt, "IU", "Pages freed by daemon");
  344 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_pfree, CTLTYPE_UINT|CTLFLAG_RD,
  345         0, VMMETEROFF(v_pfree), vcnt, "IU", "Pages freed by exiting processes");
  346 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_tfree, CTLTYPE_UINT|CTLFLAG_RD,
  347         0, VMMETEROFF(v_tfree), vcnt, "IU", "Total pages freed");
  348 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forks, CTLTYPE_UINT|CTLFLAG_RD,
  349         0, VMMETEROFF(v_forks), vcnt, "IU", "Number of fork() calls");
  350 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforks, CTLTYPE_UINT|CTLFLAG_RD,
  351         0, VMMETEROFF(v_vforks), vcnt, "IU", "Number of vfork() calls");
  352 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforks, CTLTYPE_UINT|CTLFLAG_RD,
  353         0, VMMETEROFF(v_rforks), vcnt, "IU", "Number of rfork() calls");
  354 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreads, CTLTYPE_UINT|CTLFLAG_RD,
  355         0, VMMETEROFF(v_kthreads), vcnt, "IU", "Number of fork() calls by kernel");
  356 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_forkpages, CTLTYPE_UINT|CTLFLAG_RD,
  357         0, VMMETEROFF(v_forkpages), vcnt, "IU", "VM pages affected by fork()");
  358 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_vforkpages, CTLTYPE_UINT|CTLFLAG_RD,
  359         0, VMMETEROFF(v_vforkpages), vcnt, "IU", "VM pages affected by vfork()");
  360 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_rforkpages, CTLTYPE_UINT|CTLFLAG_RD,
  361         0, VMMETEROFF(v_rforkpages), vcnt, "IU", "VM pages affected by rfork()");
  362 SYSCTL_PROC(_vm_stats_vm, OID_AUTO, v_kthreadpages, CTLTYPE_UINT|CTLFLAG_RD,
  363         0, VMMETEROFF(v_kthreadpages), vcnt, "IU", "VM pages affected by fork() by kernel");
  364 
  365 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  366         v_page_size, CTLFLAG_RD, &vmstats.v_page_size, 0,
  367         "Page size in bytes");
  368 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  369         v_page_count, CTLFLAG_RD, &vmstats.v_page_count, 0, 
  370         "Total number of pages in system");
  371 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  372         v_free_reserved, CTLFLAG_RD, &vmstats.v_free_reserved, 0,
  373         "Number of pages reserved for deadlock");
  374 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  375         v_free_target, CTLFLAG_RD, &vmstats.v_free_target, 0,
  376         "Number of pages desired free");
  377 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  378         v_free_min, CTLFLAG_RD, &vmstats.v_free_min, 0,
  379         "Minimum number of pages desired free");
  380 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  381         v_free_count, CTLFLAG_RD, &vmstats.v_free_count, 0,
  382         "Number of pages free");
  383 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  384         v_wire_count, CTLFLAG_RD, &vmstats.v_wire_count, 0,
  385         "Number of pages wired down");
  386 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  387         v_active_count, CTLFLAG_RD, &vmstats.v_active_count, 0,
  388         "Number of pages active");
  389 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  390         v_inactive_target, CTLFLAG_RD, &vmstats.v_inactive_target, 0,
  391         "Number of pages desired inactive");
  392 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  393         v_inactive_count, CTLFLAG_RD, &vmstats.v_inactive_count, 0,
  394         "Number of pages inactive");
  395 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  396         v_cache_count, CTLFLAG_RD, &vmstats.v_cache_count, 0,
  397         "Number of pages on buffer cache queue");
  398 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  399         v_cache_min, CTLFLAG_RD, &vmstats.v_cache_min, 0,
  400         "Min number of pages desired on cache queue");
  401 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  402         v_cache_max, CTLFLAG_RD, &vmstats.v_cache_max, 0,
  403         "Max number of pages in cached obj");
  404 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  405         v_pageout_free_min, CTLFLAG_RD, &vmstats.v_pageout_free_min, 0,
  406         "Min number pages reserved for kernel");
  407 SYSCTL_UINT(_vm_stats_vm, OID_AUTO,
  408         v_interrupt_free_min, CTLFLAG_RD, &vmstats.v_interrupt_free_min, 0,
  409         "Reserved number of pages for int code");
  410 SYSCTL_INT(_vm_stats_misc, OID_AUTO,
  411         zero_page_count, CTLFLAG_RD, &vm_page_zero_count, 0,
  412         "Number of zeroing pages");
  413 
  414 /*
  415  * No requirements.
  416  */
  417 static int
  418 do_vmmeter_pcpu(SYSCTL_HANDLER_ARGS)
  419 {
  420         int boffset = offsetof(struct vmmeter, vmmeter_uint_begin);
  421         int eoffset = offsetof(struct vmmeter, vmmeter_uint_end);
  422         struct globaldata *gd = arg1;
  423         struct vmmeter vmm;
  424         int off;
  425 
  426         bzero(&vmm, sizeof(vmm));
  427         for (off = boffset; off <= eoffset; off += sizeof(u_int)) {
  428                 *(u_int *)((char *)&vmm + off) +=
  429                         *(u_int *)((char *)&gd->gd_cnt + off);
  430         }
  431         vmm.v_intr += vmm.v_ipi + vmm.v_timer;
  432         return (sysctl_handle_opaque(oidp, &vmm, sizeof(vmm), req));
  433 }
  434 
  435 /*
  436  * Called from the low level boot code only.
  437  */
  438 static void
  439 vmmeter_init(void *dummy __unused)
  440 {
  441         int i;
  442 
  443         for (i = 0; i < ncpus; ++i) {
  444                 struct sysctl_ctx_list *ctx;
  445                 struct sysctl_oid *oid;
  446                 struct globaldata *gd;
  447                 char name[32];
  448 
  449                 ksnprintf(name, sizeof(name), "cpu%d", i);
  450 
  451                 ctx = kmalloc(sizeof(*ctx), M_TEMP, M_WAITOK);
  452                 sysctl_ctx_init(ctx);
  453                 oid = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_vm),
  454                                       OID_AUTO, name, CTLFLAG_RD, 0, "");
  455 
  456                 gd = globaldata_find(i);
  457                 SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
  458                                 "vmmeter", CTLTYPE_OPAQUE|CTLFLAG_RD,
  459                                 gd, sizeof(struct vmmeter), do_vmmeter_pcpu,
  460                                 "S,vmmeter", "System per-cpu statistics");
  461         }
  462 }
  463 SYSINIT(vmmeter, SI_SUB_PSEUDO, SI_ORDER_ANY, vmmeter_init, 0);

Cache object: 9a54c13de42001ac920072f4e84b939a


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