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NetBSD/sys/uvm/uvm_meter.c

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/* $NetBSD: uvm_meter.c,v 1.80 2020/06/14 21:41:42 ad Exp $ */
/*
* Copyright (c) 1997 Charles D. Cranor and Washington University.
* 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. 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
* from: Id: uvm_meter.c,v 1.1.2.1 1997/08/14 19:10:35 chuck Exp
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: uvm_meter.c,v 1.80 2020/06/14 21:41:42 ad Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/cpu.h>
#include <sys/proc.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <uvm/uvm.h>
#include <uvm/uvm_pdpolicy.h>
/*
* maxslp: ???? XXXCDC
*/
int maxslp = MAXSLP; /* patchable ... */
struct loadavg averunnable;
static void uvm_total(struct vmtotal *);
/*
* sysctl helper routine for the vm.vmmeter node.
*/
static int
sysctl_vm_meter(SYSCTLFN_ARGS)
{
struct sysctlnode node;
struct vmtotal vmtotals;
node = *rnode;
node.sysctl_data = &vmtotals;
uvm_total(&vmtotals);
return (sysctl_lookup(SYSCTLFN_CALL(&node)));
}
/*
* sysctl helper routine for the vm.uvmexp node.
*/
static int
sysctl_vm_uvmexp(SYSCTLFN_ARGS)
{
struct sysctlnode node;
uvm_update_uvmexp();
node = *rnode;
if (oldlenp)
node.sysctl_size = uimin(*oldlenp, node.sysctl_size);
return (sysctl_lookup(SYSCTLFN_CALL(&node)));
}
static int
sysctl_vm_uvmexp2(SYSCTLFN_ARGS)
{
struct sysctlnode node;
struct uvmexp_sysctl u;
int active, inactive;
uvm_estimatepageable(&active, &inactive);
memset(&u, 0, sizeof(u));
/* uvm_availmem() will sync the counters if old. */
u.free = uvm_availmem(true);
u.pagesize = uvmexp.pagesize;
u.pagemask = uvmexp.pagemask;
u.pageshift = uvmexp.pageshift;
u.npages = uvmexp.npages;
u.active = active;
u.inactive = inactive;
u.paging = uvmexp.paging;
u.wired = uvmexp.wired;
u.reserve_pagedaemon = uvmexp.reserve_pagedaemon;
u.reserve_kernel = uvmexp.reserve_kernel;
u.freemin = uvmexp.freemin;
u.freetarg = uvmexp.freetarg;
u.inactarg = 0; /* unused */
u.wiredmax = uvmexp.wiredmax;
u.nswapdev = uvmexp.nswapdev;
u.swpages = uvmexp.swpages;
u.swpginuse = uvmexp.swpginuse;
u.swpgonly = uvmexp.swpgonly;
u.nswget = uvmexp.nswget;
u.cpuhit = cpu_count_get(CPU_COUNT_CPUHIT);
u.cpumiss = cpu_count_get(CPU_COUNT_CPUMISS);
u.faults = cpu_count_get(CPU_COUNT_NFAULT);
u.traps = cpu_count_get(CPU_COUNT_NTRAP);
u.intrs = cpu_count_get(CPU_COUNT_NINTR);
u.swtch = cpu_count_get(CPU_COUNT_NSWTCH);
u.softs = cpu_count_get(CPU_COUNT_NSOFT);
u.syscalls = cpu_count_get(CPU_COUNT_NSYSCALL);
u.pageins = cpu_count_get(CPU_COUNT_PAGEINS);
u.pgswapin = 0; /* unused */
u.pgswapout = uvmexp.pgswapout;
u.forks = cpu_count_get(CPU_COUNT_FORKS);
u.forks_ppwait = cpu_count_get(CPU_COUNT_FORKS_PPWAIT);
u.forks_sharevm = cpu_count_get(CPU_COUNT_FORKS_SHAREVM);
u.zeroaborts = uvmexp.zeroaborts;
u.fltnoram = cpu_count_get(CPU_COUNT_FLTNORAM);
u.fltnoanon = cpu_count_get(CPU_COUNT_FLTNOANON);
u.fltpgwait = cpu_count_get(CPU_COUNT_FLTPGWAIT);
u.fltpgrele = cpu_count_get(CPU_COUNT_FLTPGRELE);
u.fltrelck = cpu_count_get(CPU_COUNT_FLTRELCK);
u.fltrelckok = cpu_count_get(CPU_COUNT_FLTRELCKOK);
u.fltanget = cpu_count_get(CPU_COUNT_FLTANGET);
u.fltanretry = cpu_count_get(CPU_COUNT_FLTANRETRY);
u.fltamcopy = cpu_count_get(CPU_COUNT_FLTAMCOPY);
u.fltnamap = cpu_count_get(CPU_COUNT_FLTNAMAP);
u.fltnomap = cpu_count_get(CPU_COUNT_FLTNOMAP);
u.fltlget = cpu_count_get(CPU_COUNT_FLTLGET);
u.fltget = cpu_count_get(CPU_COUNT_FLTGET);
u.flt_anon = cpu_count_get(CPU_COUNT_FLT_ANON);
u.flt_acow = cpu_count_get(CPU_COUNT_FLT_ACOW);
u.flt_obj = cpu_count_get(CPU_COUNT_FLT_OBJ);
u.flt_prcopy = cpu_count_get(CPU_COUNT_FLT_PRCOPY);
u.flt_przero = cpu_count_get(CPU_COUNT_FLT_PRZERO);
u.pdwoke = uvmexp.pdwoke;
u.pdrevs = uvmexp.pdrevs;
u.pdfreed = uvmexp.pdfreed;
u.pdscans = uvmexp.pdscans;
u.pdanscan = uvmexp.pdanscan;
u.pdobscan = uvmexp.pdobscan;
u.pdreact = uvmexp.pdreact;
u.pdbusy = uvmexp.pdbusy;
u.pdpageouts = uvmexp.pdpageouts;
u.pdpending = uvmexp.pdpending;
u.pddeact = uvmexp.pddeact;
u.execpages = cpu_count_get(CPU_COUNT_EXECPAGES);
u.colorhit = cpu_count_get(CPU_COUNT_COLORHIT);
u.colormiss = cpu_count_get(CPU_COUNT_COLORMISS);
u.ncolors = uvmexp.ncolors;
u.bootpages = uvmexp.bootpages;
u.poolpages = pool_totalpages();
u.countsyncall = cpu_count_get(CPU_COUNT_SYNC);
u.anonunknown = cpu_count_get(CPU_COUNT_ANONUNKNOWN);
u.anonclean = cpu_count_get(CPU_COUNT_ANONCLEAN);
u.anondirty = cpu_count_get(CPU_COUNT_ANONDIRTY);
u.fileunknown = cpu_count_get(CPU_COUNT_FILEUNKNOWN);
u.fileclean = cpu_count_get(CPU_COUNT_FILECLEAN);
u.filedirty = cpu_count_get(CPU_COUNT_FILEDIRTY);
u.fltup = cpu_count_get(CPU_COUNT_FLTUP);
u.fltnoup = cpu_count_get(CPU_COUNT_FLTNOUP);
u.anonpages = u.anonclean + u.anondirty + u.anonunknown;
u.filepages = u.fileclean + u.filedirty + u.fileunknown - u.execpages;
node = *rnode;
node.sysctl_data = &u;
node.sysctl_size = sizeof(u);
if (oldlenp)
node.sysctl_size = uimin(*oldlenp, node.sysctl_size);
return (sysctl_lookup(SYSCTLFN_CALL(&node)));
}
/*
* sysctl helper routine for uvm_pctparam.
*/
static int
uvm_sysctlpctparam(SYSCTLFN_ARGS)
{
int t, error;
struct sysctlnode node;
struct uvm_pctparam *pct;
pct = rnode->sysctl_data;
t = pct->pct_pct;
node = *rnode;
node.sysctl_data = &t;
error = sysctl_lookup(SYSCTLFN_CALL(&node));
if (error || newp == NULL)
return error;
if (t < 0 || t > 100)
return EINVAL;
error = uvm_pctparam_check(pct, t);
if (error) {
return error;
}
uvm_pctparam_set(pct, t);
return (0);
}
/*
* uvm_sysctl: sysctl hook into UVM system.
*/
SYSCTL_SETUP(sysctl_vm_setup, "sysctl vm subtree setup")
{
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "vmmeter",
SYSCTL_DESCR("Simple system-wide virtual memory "
"statistics"),
sysctl_vm_meter, 0, NULL, sizeof(struct vmtotal),
CTL_VM, VM_METER, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "loadavg",
SYSCTL_DESCR("System load average history"),
NULL, 0, &averunnable, sizeof(averunnable),
CTL_VM, VM_LOADAVG, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "uvmexp",
SYSCTL_DESCR("Detailed system-wide virtual memory "
"statistics"),
sysctl_vm_uvmexp, 0, &uvmexp, sizeof(uvmexp),
CTL_VM, VM_UVMEXP, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT,
CTLTYPE_STRUCT, "uvmexp2",
SYSCTL_DESCR("Detailed system-wide virtual memory "
"statistics (MI)"),
sysctl_vm_uvmexp2, 0, NULL, 0,
CTL_VM, VM_UVMEXP2, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT, CTLTYPE_INT, "maxslp",
SYSCTL_DESCR("Maximum process sleep time before being "
"swapped"),
NULL, 0, &maxslp, 0,
CTL_VM, VM_MAXSLP, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
CTLTYPE_INT, "uspace",
SYSCTL_DESCR("Number of bytes allocated for a kernel "
"stack"),
NULL, USPACE, NULL, 0,
CTL_VM, VM_USPACE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
CTLTYPE_LONG, "minaddress",
SYSCTL_DESCR("Minimum user address"),
NULL, VM_MIN_ADDRESS, NULL, 0,
CTL_VM, VM_MINADDRESS, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE,
CTLTYPE_LONG, "maxaddress",
SYSCTL_DESCR("Maximum user address"),
NULL, VM_MAX_ADDRESS, NULL, 0,
CTL_VM, VM_MAXADDRESS, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_UNSIGNED,
CTLTYPE_INT, "guard_size",
SYSCTL_DESCR("Guard size of main thread"),
NULL, 0, &user_stack_guard_size, 0,
CTL_VM, VM_GUARD_SIZE, CTL_EOL);
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_UNSIGNED|CTLFLAG_READWRITE,
CTLTYPE_INT, "thread_guard_size",
SYSCTL_DESCR("Guard size of other threads"),
NULL, 0, &user_thread_stack_guard_size, 0,
CTL_VM, VM_THREAD_GUARD_SIZE, CTL_EOL);
#ifdef PMAP_DIRECT
sysctl_createv(clog, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_BOOL, "ubc_direct",
SYSCTL_DESCR("Use direct map for UBC I/O"),
NULL, 0, &ubc_direct, 0,
CTL_VM, CTL_CREATE, CTL_EOL);
#endif
uvmpdpol_sysctlsetup();
}
/*
* uvm_total: calculate the current state of the system.
*/
static void
uvm_total(struct vmtotal *totalp)
{
struct lwp *l;
#if 0
struct vm_map_entry * entry;
struct vm_map *map;
int paging;
#endif
int freepg;
int active;
memset(totalp, 0, sizeof *totalp);
/*
* calculate process statistics
*/
mutex_enter(&proc_lock);
LIST_FOREACH(l, &alllwp, l_list) {
if (l->l_proc->p_flag & PK_SYSTEM)
continue;
switch (l->l_stat) {
case 0:
continue;
case LSSLEEP:
case LSSTOP:
if ((l->l_flag & LW_SINTR) == 0) {
totalp->t_dw++;
} else if (l->l_slptime < maxslp) {
totalp->t_sl++;
}
if (l->l_slptime >= maxslp)
continue;
break;
case LSRUN:
case LSONPROC:
case LSIDL:
totalp->t_rq++;
if (l->l_stat == LSIDL)
continue;
break;
}
/*
* note active objects
*/
#if 0
/*
* XXXCDC: BOGUS! rethink this. in the mean time
* don't do it.
*/
paging = 0;
vm_map_lock(map);
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.uvm_obj == NULL)
continue;
/* XXX how to do this with uvm */
}
vm_map_unlock(map);
if (paging)
totalp->t_pw++;
#endif
}
mutex_exit(&proc_lock);
/*
* Calculate object memory usage statistics.
*/
freepg = uvm_availmem(true);
uvm_estimatepageable(&active, NULL);
totalp->t_free = freepg;
totalp->t_vm = uvmexp.npages - freepg + uvmexp.swpginuse;
totalp->t_avm = active + uvmexp.swpginuse; /* XXX */
totalp->t_rm = uvmexp.npages - freepg;
totalp->t_arm = active;
totalp->t_vmshr = 0; /* XXX */
totalp->t_avmshr = 0; /* XXX */
totalp->t_rmshr = 0; /* XXX */
totalp->t_armshr = 0; /* XXX */
}
void
uvm_pctparam_set(struct uvm_pctparam *pct, int val)
{
pct->pct_pct = val;
pct->pct_scaled = val * UVM_PCTPARAM_SCALE / 100;
}
int
uvm_pctparam_get(struct uvm_pctparam *pct)
{
return pct->pct_pct;
}
int
uvm_pctparam_check(struct uvm_pctparam *pct, int val)
{
if (pct->pct_check == NULL) {
return 0;
}
return (*pct->pct_check)(pct, val);
}
void
uvm_pctparam_init(struct uvm_pctparam *pct, int val,
int (*fn)(struct uvm_pctparam *, int))
{
pct->pct_check = fn;
uvm_pctparam_set(pct, val);
}
int
uvm_pctparam_createsysctlnode(struct uvm_pctparam *pct, const char *name,
const char *desc)
{
return sysctl_createv(NULL, 0, NULL, NULL,
CTLFLAG_PERMANENT|CTLFLAG_READWRITE,
CTLTYPE_INT, name, SYSCTL_DESCR(desc),
uvm_sysctlpctparam, 0, (void *)pct, 0, CTL_VM, CTL_CREATE, CTL_EOL);
}
/*
* Update uvmexp with aggregate values from the per-CPU counters.
*/
void
uvm_update_uvmexp(void)
{
/* uvm_availmem() will sync the counters if old. */
uvmexp.free = (int)uvm_availmem(true);
uvmexp.cpuhit = (int)cpu_count_get(CPU_COUNT_CPUHIT);
uvmexp.cpumiss = (int)cpu_count_get(CPU_COUNT_CPUMISS);
uvmexp.faults = (int)cpu_count_get(CPU_COUNT_NFAULT);
uvmexp.traps = (int)cpu_count_get(CPU_COUNT_NTRAP);
uvmexp.intrs = (int)cpu_count_get(CPU_COUNT_NINTR);
uvmexp.swtch = (int)cpu_count_get(CPU_COUNT_NSWTCH);
uvmexp.softs = (int)cpu_count_get(CPU_COUNT_NSOFT);
uvmexp.syscalls = (int)cpu_count_get(CPU_COUNT_NSYSCALL);
uvmexp.pageins = (int)cpu_count_get(CPU_COUNT_PAGEINS);
uvmexp.forks = (int)cpu_count_get(CPU_COUNT_FORKS);
uvmexp.forks_ppwait = (int)cpu_count_get(CPU_COUNT_FORKS_PPWAIT);
uvmexp.forks_sharevm = (int)cpu_count_get(CPU_COUNT_FORKS_SHAREVM);
uvmexp.fltnoram = (int)cpu_count_get(CPU_COUNT_FLTNORAM);
uvmexp.fltnoanon = (int)cpu_count_get(CPU_COUNT_FLTNOANON);
uvmexp.fltpgwait = (int)cpu_count_get(CPU_COUNT_FLTPGWAIT);
uvmexp.fltpgrele = (int)cpu_count_get(CPU_COUNT_FLTPGRELE);
uvmexp.fltrelck = (int)cpu_count_get(CPU_COUNT_FLTRELCK);
uvmexp.fltrelckok = (int)cpu_count_get(CPU_COUNT_FLTRELCKOK);
uvmexp.fltanget = (int)cpu_count_get(CPU_COUNT_FLTANGET);
uvmexp.fltanretry = (int)cpu_count_get(CPU_COUNT_FLTANRETRY);
uvmexp.fltamcopy = (int)cpu_count_get(CPU_COUNT_FLTAMCOPY);
uvmexp.fltnamap = (int)cpu_count_get(CPU_COUNT_FLTNAMAP);
uvmexp.fltnomap = (int)cpu_count_get(CPU_COUNT_FLTNOMAP);
uvmexp.fltlget = (int)cpu_count_get(CPU_COUNT_FLTLGET);
uvmexp.fltget = (int)cpu_count_get(CPU_COUNT_FLTGET);
uvmexp.flt_anon = (int)cpu_count_get(CPU_COUNT_FLT_ANON);
uvmexp.flt_acow = (int)cpu_count_get(CPU_COUNT_FLT_ACOW);
uvmexp.flt_obj = (int)cpu_count_get(CPU_COUNT_FLT_OBJ);
uvmexp.flt_prcopy = (int)cpu_count_get(CPU_COUNT_FLT_PRCOPY);
uvmexp.flt_przero = (int)cpu_count_get(CPU_COUNT_FLT_PRZERO);
uvmexp.anonpages = (int)(cpu_count_get(CPU_COUNT_ANONCLEAN) +
cpu_count_get(CPU_COUNT_ANONDIRTY) +
cpu_count_get(CPU_COUNT_ANONUNKNOWN));
uvmexp.filepages = (int)(cpu_count_get(CPU_COUNT_FILECLEAN) +
cpu_count_get(CPU_COUNT_FILEDIRTY) +
cpu_count_get(CPU_COUNT_FILEUNKNOWN) -
cpu_count_get(CPU_COUNT_EXECPAGES));
uvmexp.execpages = (int)cpu_count_get(CPU_COUNT_EXECPAGES);
uvmexp.colorhit = (int)cpu_count_get(CPU_COUNT_COLORHIT);
uvmexp.colormiss = (int)cpu_count_get(CPU_COUNT_COLORMISS);
}
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