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NetBSD/usr.bin/top/machine/m_netbsd15.c

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/* $NetBSD: m_netbsd15.c,v 1.16 2002/03/23 01:28:11 thorpej Exp $ */
/*
* top - a top users display for Unix
*
* SYNOPSIS: For a NetBSD-1.5 (or later) system
*
* DESCRIPTION:
* Originally written for BSD4.4 system by Christos Zoulas.
* Based on the FreeBSD 2.0 version by Steven Wallace and Wolfram Schneider.
* NetBSD-1.0 port by Arne Helme. Process ordering by Luke Mewburn.
* NetBSD-1.3 port by Luke Mewburn, based on code by Matthew Green.
* NetBSD-1.4/UVM port by matthew green.
* NetBSD-1.5 port by Simon Burge.
* NetBSD-1.6/UBC port by Tomas Svensson.
* -
* This is the machine-dependent module for NetBSD-1.5 and later
* works for:
* NetBSD-1.5ZC
* and should work for:
* NetBSD-1.6 (when released)
* -
* top does not need to be installed setuid or setgid with this module.
*
* LIBS: -lkvm
*
* CFLAGS: -DHAVE_GETOPT -DORDER -DHAVE_STRERROR
*
* AUTHORS: Christos Zoulas <christos@ee.cornell.edu>
* Steven Wallace <swallace@freebsd.org>
* Wolfram Schneider <wosch@cs.tu-berlin.de>
* Arne Helme <arne@acm.org>
* Luke Mewburn <lukem@netbsd.org>
* matthew green <mrg@eterna.com.au>
* Simon Burge <simonb@netbsd.org>
* Tomas Svensson <ts@unix1.net>
*
*
* $Id: m_netbsd15.c,v 1.16 2002/03/23 01:28:11 thorpej Exp $
*/
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/sched.h>
#include <sys/swap.h>
#include <uvm/uvm_extern.h>
#include <err.h>
#include <errno.h>
#include <kvm.h>
#include <math.h>
#include <nlist.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "os.h"
#include "top.h"
#include "machine.h"
#include "utils.h"
#include "display.h"
#include "loadavg.h"
void percentages64 __P((int, int *, u_int64_t *, u_int64_t *, u_int64_t *));
/* get_process_info passes back a handle. This is what it looks like: */
struct handle {
struct kinfo_proc2 **next_proc; /* points to next valid proc pointer */
int remaining; /* number of pointers remaining */
};
/* define what weighted cpu is. */
#define weighted_cpu(pct, pp) ((pp)->p_swtime == 0 ? 0.0 : \
((pct) / (1.0 - exp((pp)->p_swtime * logcpu))))
/* what we consider to be process size: */
#define PROCSIZE(pp) \
((pp)->p_vm_tsize + (pp)->p_vm_dsize + (pp)->p_vm_ssize)
/*
* These definitions control the format of the per-process area
*/
static char header[] =
" PID X PRI NICE SIZE RES STATE TIME WCPU CPU COMMAND";
/* 0123456 -- field to fill in starts at header+6 */
#define UNAME_START 6
#define Proc_format \
"%5d %-8.8s %3d %4d%7s %5s %-8.8s%7s %5.2f%% %5.2f%% %.12s"
/*
* Process state names for the "STATE" column of the display.
*/
const char *state_abbrev[] = {
"", "START", "RUN", "SLEEP", "STOP", "ZOMB", "DEAD", "CPU"
};
static kvm_t *kd;
/* these are retrieved from the kernel in _init */
static double logcpu;
static int hz;
static int ccpu;
/* these are for calculating cpu state percentages */
static u_int64_t cp_time[CPUSTATES];
static u_int64_t cp_old[CPUSTATES];
static u_int64_t cp_diff[CPUSTATES];
/* these are for detailing the process states */
int process_states[8];
char *procstatenames[] = {
"", " starting, ", " runnable, ", " sleeping, ", " stopped, ",
" zombie, ", " dead, ", " on processor, ",
NULL
};
/* these are for detailing the cpu states */
int cpu_states[CPUSTATES];
char *cpustatenames[] = {
"user", "nice", "system", "interrupt", "idle", NULL
};
/* these are for detailing the memory statistics */
int memory_stats[7];
char *memorynames[] = {
"K Act, ", "K Inact, ", "K Wired, ", "K Exec, ", "K File, ",
"K Free, ",
NULL
};
int swap_stats[4];
char *swapnames[] = {
"K Total, ", "K Used, ", "K Free, ",
NULL
};
/* these are names given to allowed sorting orders -- first is default */
char *ordernames[] = {
"cpu",
"pri",
"res",
"size",
"state",
"time",
NULL
};
/* forward definitions for comparison functions */
static int compare_cpu __P((struct proc **, struct proc **));
static int compare_prio __P((struct proc **, struct proc **));
static int compare_res __P((struct proc **, struct proc **));
static int compare_size __P((struct proc **, struct proc **));
static int compare_state __P((struct proc **, struct proc **));
static int compare_time __P((struct proc **, struct proc **));
int (*proc_compares[]) __P((struct proc **, struct proc **)) = {
compare_cpu,
compare_prio,
compare_res,
compare_size,
compare_state,
compare_time,
NULL
};
/* these are for keeping track of the proc array */
static int nproc;
static int onproc = -1;
static int pref_len;
static struct kinfo_proc2 *pbase;
static struct kinfo_proc2 **pref;
/* these are for getting the memory statistics */
static int pageshift; /* log base 2 of the pagesize */
/* define pagetok in terms of pageshift */
#define pagetok(size) ((size) << pageshift)
int
machine_init(statics)
struct statics *statics;
{
int pagesize;
int mib[2];
size_t size;
struct clockinfo clockinfo;
if ((kd = kvm_open(NULL, NULL, NULL, KVM_NO_FILES, "kvm_open")) == NULL)
return -1;
mib[0] = CTL_KERN;
mib[1] = KERN_CCPU;
size = sizeof(ccpu);
if (sysctl(mib, 2, &ccpu, &size, NULL, 0) == -1) {
fprintf(stderr, "top: sysctl kern.ccpu failed: %s\n",
strerror(errno));
return(-1);
}
mib[0] = CTL_KERN;
mib[1] = KERN_CLOCKRATE;
size = sizeof(clockinfo);
if (sysctl(mib, 2, &clockinfo, &size, NULL, 0) == -1) {
fprintf(stderr, "top: sysctl kern.clockrate failed: %s\n",
strerror(errno));
return(-1);
}
hz = clockinfo.stathz;
/* this is used in calculating WCPU -- calculate it ahead of time */
logcpu = log(loaddouble(ccpu));
pbase = NULL;
pref = NULL;
nproc = 0;
onproc = -1;
/* get the page size with "getpagesize" and calculate pageshift from it */
pagesize = getpagesize();
pageshift = 0;
while (pagesize > 1) {
pageshift++;
pagesize >>= 1;
}
/* we only need the amount of log(2)1024 for our conversion */
pageshift -= LOG1024;
/* fill in the statics information */
statics->procstate_names = procstatenames;
statics->cpustate_names = cpustatenames;
statics->memory_names = memorynames;
statics->swap_names = swapnames;
statics->order_names = ordernames;
/* all done! */
return(0);
}
char *
format_header(uname_field)
char *uname_field;
{
char *ptr;
ptr = header + UNAME_START;
while (*uname_field != '\0') {
*ptr++ = *uname_field++;
}
return(header);
}
void
get_system_info(si)
struct system_info *si;
{
size_t ssize;
int mib[2];
struct uvmexp_sysctl uvmexp;
struct swapent *sep, *seporig;
u_int64_t totalsize, totalinuse;
int size, inuse, ncounted;
int rnswap, nswap;
mib[0] = CTL_KERN;
mib[1] = KERN_CP_TIME;
ssize = sizeof(cp_time);
if (sysctl(mib, 2, cp_time, &ssize, NULL, 0) < 0) {
fprintf(stderr, "top: sysctl kern.cp_time failed: %s\n",
strerror(errno));
quit(23);
}
if (getloadavg(si->load_avg, NUM_AVERAGES) < 0) {
int i;
warn("can't getloadavg");
for (i = 0; i < NUM_AVERAGES; i++)
si->load_avg[i] = 0.0;
}
/* convert cp_time counts to percentages */
percentages64(CPUSTATES, cpu_states, cp_time, cp_old, cp_diff);
mib[0] = CTL_VM;
mib[1] = VM_UVMEXP2;
ssize = sizeof(uvmexp);
if (sysctl(mib, 2, &uvmexp, &ssize, NULL, 0) < 0) {
fprintf(stderr, "top: sysctl vm.uvmexp2 failed: %s\n",
strerror(errno));
quit(23);
}
/* convert memory stats to Kbytes */
memory_stats[0] = pagetok(uvmexp.active);
memory_stats[1] = pagetok(uvmexp.inactive);
memory_stats[2] = pagetok(uvmexp.wired);
memory_stats[3] = pagetok(uvmexp.execpages);
memory_stats[4] = pagetok(uvmexp.filepages);
memory_stats[5] = pagetok(uvmexp.free);
swap_stats[0] = swap_stats[1] = swap_stats[2] = 0;
seporig = NULL;
do {
nswap = swapctl(SWAP_NSWAP, 0, 0);
if (nswap < 1)
break;
/* Use seporig to keep track of the malloc'd memory
* base, as sep will be incremented in the for loop
* below.
*/
seporig = sep = (struct swapent *)malloc(nswap * sizeof(*sep));
if (sep == NULL)
break;
rnswap = swapctl(SWAP_STATS, (void *)sep, nswap);
if (nswap != rnswap)
break;
totalsize = totalinuse = ncounted = 0;
for (; rnswap-- > 0; sep++) {
ncounted++;
size = sep->se_nblks;
inuse = sep->se_inuse;
totalsize += size;
totalinuse += inuse;
}
swap_stats[0] = dbtob(totalsize) / 1024;
swap_stats[1] = dbtob(totalinuse) / 1024;
swap_stats[2] = dbtob(totalsize) / 1024 - swap_stats[1];
/* Free here, before we malloc again in the next
* iteration of this loop.
*/
if (seporig) {
free(seporig);
seporig = NULL;
}
} while (0);
/* Catch the case where we malloc'd, but then exited the
* loop due to nswap != rnswap.
*/
if (seporig)
free(seporig);
memory_stats[6] = -1;
swap_stats[3] = -1;
/* set arrays and strings */
si->cpustates = cpu_states;
si->memory = memory_stats;
si->swap = swap_stats;
si->last_pid = -1;
}
caddr_t
get_process_info(si, sel, compare)
struct system_info *si;
struct process_select *sel;
int (*compare) __P((struct proc **, struct proc **));
{
int i;
int total_procs;
int active_procs;
struct kinfo_proc2 **prefp;
struct kinfo_proc2 *pp;
/* these are copied out of sel for speed */
int show_idle;
int show_system;
int show_uid;
int show_command;
static struct handle handle;
pbase = kvm_getproc2(kd, KERN_PROC_ALL, 0, sizeof(struct kinfo_proc2), &nproc);
if (nproc > onproc)
pref = (struct kinfo_proc2 **) realloc(pref,
sizeof(struct kinfo_proc2 *) * (onproc = nproc));
if (pref == NULL || pbase == NULL) {
(void) fprintf(stderr, "top: Out of memory.\n");
quit(23);
}
/* get a pointer to the states summary array */
si->procstates = process_states;
/* set up flags which define what we are going to select */
show_idle = sel->idle;
show_system = sel->system;
show_uid = sel->uid != -1;
show_command = sel->command != NULL;
/* count up process states and get pointers to interesting procs */
total_procs = 0;
active_procs = 0;
memset((char *)process_states, 0, sizeof(process_states));
prefp = pref;
for (pp = pbase, i = 0; i < nproc; pp++, i++) {
/*
* Place pointers to each valid proc structure in pref[].
* Process slots that are actually in use have a non-zero
* status field. Processes with P_SYSTEM set are system
* processes---these get ignored unless show_sysprocs is set.
*/
if (pp->p_stat != 0 && (show_system || ((pp->p_flag & P_SYSTEM) == 0))) {
total_procs++;
process_states[(unsigned char) pp->p_stat]++;
if (pp->p_stat != SZOMB && pp->p_stat != SDEAD &&
(show_idle || (pp->p_pctcpu != 0) ||
(pp->p_stat == SRUN || pp->p_stat == SONPROC)) &&
(!show_uid || pp->p_ruid == (uid_t)sel->uid)) {
*prefp++ = pp;
active_procs++;
}
}
}
/* if requested, sort the "interesting" processes */
if (compare != NULL) {
qsort((char *)pref, active_procs, sizeof(struct kinfo_proc2 *),
(int (*) __P((const void *, const void *)))compare);
}
/* remember active and total counts */
si->p_total = total_procs;
si->p_active = pref_len = active_procs;
/* pass back a handle */
handle.next_proc = pref;
handle.remaining = active_procs;
return((caddr_t)&handle);
}
char *
format_next_process(handle, get_userid)
caddr_t handle;
char *(*get_userid) __P((int));
{
struct kinfo_proc2 *pp;
long cputime;
double pct;
struct handle *hp;
const char *statep;
#ifdef KI_NOCPU
char state[10];
#endif
char wmesg[KI_WMESGLEN + 1];
static char fmt[128]; /* static area where result is built */
char *pretty = "";
/* find and remember the next proc structure */
hp = (struct handle *)handle;
pp = *(hp->next_proc++);
hp->remaining--;
/* get the process's user struct and set cputime */
if ((pp->p_flag & P_INMEM) == 0)
pretty = "<>";
else if ((pp->p_flag & P_SYSTEM) != 0)
pretty = "[]";
if (pretty[0] != '\0') {
/*
* Print swapped processes as <pname> and
* system processes as [pname]
*/
char *comm = pp->p_comm;
#define COMSIZ sizeof(pp->p_comm)
char buf[COMSIZ];
(void) strncpy(buf, comm, COMSIZ);
comm[0] = pretty[0];
(void) strncpy(&comm[1], buf, COMSIZ - 2);
comm[COMSIZ - 2] = '\0';
(void) strncat(comm, &pretty[1], COMSIZ - 1);
comm[COMSIZ - 1] = '\0';
}
#if 0
/* This does not produce the correct results */
cputime = pp->p_uticks + pp->p_sticks + pp->p_iticks;
#else
cputime = pp->p_rtime_sec; /* This does not count interrupts */
#endif
/* calculate the base for cpu percentages */
pct = pctdouble(pp->p_pctcpu);
if (pp->p_stat == SSLEEP) {
strlcpy(wmesg, pp->p_wmesg, sizeof(wmesg));
statep = wmesg;
} else
statep = state_abbrev[(unsigned)pp->p_stat];
#ifdef KI_NOCPU
/* Post-1.5 change: add cpu number if appropriate */
if (pp->p_cpuid != KI_NOCPU) {
switch (pp->p_stat) {
case SONPROC:
case SRUN:
case SSLEEP:
snprintf(state, sizeof(state), "%.6s/%lld",
statep, (long long)pp->p_cpuid);
statep = state;
break;
}
}
#endif
/* format this entry */
sprintf(fmt,
Proc_format,
pp->p_pid,
(*get_userid)(pp->p_ruid),
pp->p_priority - PZERO,
pp->p_nice - NZERO,
format_k(pagetok(PROCSIZE(pp))),
format_k(pagetok(pp->p_vm_rssize)),
statep,
format_time(cputime),
100.0 * weighted_cpu(pct, pp),
100.0 * pct,
printable(pp->p_comm));
/* return the result */
return(fmt);
}
/* comparison routines for qsort */
/*
* There are currently four possible comparison routines. main selects
* one of these by indexing in to the array proc_compares.
*
* Possible keys are defined as macros below. Currently these keys are
* defined: percent cpu, cpu ticks, process state, resident set size,
* total virtual memory usage. The process states are ordered as follows
* (from least to most important): WAIT, zombie, sleep, stop, start, run.
* The array declaration below maps a process state index into a number
* that reflects this ordering.
*/
/*
* First, the possible comparison keys. These are defined in such a way
* that they can be merely listed in the source code to define the actual
* desired ordering.
*/
#define ORDERKEY_PCTCPU \
if (lresult = (pctcpu)(p2)->p_pctcpu - (pctcpu)(p1)->p_pctcpu,\
(result = lresult > 0 ? 1 : lresult < 0 ? -1 : 0) == 0)
#define ORDERKEY_CPTICKS \
if (lresult = (pctcpu)(p2)->p_rtime_sec \
- (pctcpu)(p1)->p_rtime_sec,\
(result = lresult > 0 ? 1 : lresult < 0 ? -1 : 0) == 0)
#define ORDERKEY_STATE \
if ((result = sorted_state[(int)(p2)->p_stat] - \
sorted_state[(int)(p1)->p_stat] ) == 0)
#define ORDERKEY_PRIO \
if ((result = (p2)->p_priority - (p1)->p_priority) == 0)
#define ORDERKEY_RSSIZE \
if ((result = p2->p_vm_rssize - p1->p_vm_rssize) == 0)
#define ORDERKEY_MEM \
if ((result = (PROCSIZE(p2) - PROCSIZE(p1))) == 0)
/*
* Now the array that maps process state to a weight.
* The order of the elements should match those in state_abbrev[]
*/
static int sorted_state[] = {
0, /* (not used) ? */
6, /* "start" SIDL */
4, /* "run" SRUN */
3, /* "sleep" SSLEEP */
3, /* "stop" SSTOP */
2, /* "dead" SDEAD */
1, /* "zomb" SZOMB */
5, /* "onproc" SONPROC */
};
/* compare_cpu - the comparison function for sorting by cpu percentage */
static int
compare_cpu(pp1, pp2)
struct proc **pp1, **pp2;
{
struct kinfo_proc2 *p1;
struct kinfo_proc2 *p2;
int result;
pctcpu lresult;
/* remove one level of indirection */
p1 = *(struct kinfo_proc2 **) pp1;
p2 = *(struct kinfo_proc2 **) pp2;
ORDERKEY_PCTCPU
ORDERKEY_CPTICKS
ORDERKEY_STATE
ORDERKEY_PRIO
ORDERKEY_RSSIZE
ORDERKEY_MEM
;
return (result);
}
/* compare_prio - the comparison function for sorting by process priority */
static int
compare_prio(pp1, pp2)
struct proc **pp1, **pp2;
{
struct kinfo_proc2 *p1;
struct kinfo_proc2 *p2;
int result;
pctcpu lresult;
/* remove one level of indirection */
p1 = *(struct kinfo_proc2 **) pp1;
p2 = *(struct kinfo_proc2 **) pp2;
ORDERKEY_PRIO
ORDERKEY_PCTCPU
ORDERKEY_CPTICKS
ORDERKEY_STATE
ORDERKEY_RSSIZE
ORDERKEY_MEM
;
return (result);
}
/* compare_res - the comparison function for sorting by resident set size */
static int
compare_res(pp1, pp2)
struct proc **pp1, **pp2;
{
struct kinfo_proc2 *p1;
struct kinfo_proc2 *p2;
int result;
pctcpu lresult;
/* remove one level of indirection */
p1 = *(struct kinfo_proc2 **) pp1;
p2 = *(struct kinfo_proc2 **) pp2;
ORDERKEY_RSSIZE
ORDERKEY_MEM
ORDERKEY_PCTCPU
ORDERKEY_CPTICKS
ORDERKEY_STATE
ORDERKEY_PRIO
;
return (result);
}
/* compare_size - the comparison function for sorting by total memory usage */
static int
compare_size(pp1, pp2)
struct proc **pp1, **pp2;
{
struct kinfo_proc2 *p1;
struct kinfo_proc2 *p2;
int result;
pctcpu lresult;
/* remove one level of indirection */
p1 = *(struct kinfo_proc2 **) pp1;
p2 = *(struct kinfo_proc2 **) pp2;
ORDERKEY_MEM
ORDERKEY_RSSIZE
ORDERKEY_PCTCPU
ORDERKEY_CPTICKS
ORDERKEY_STATE
ORDERKEY_PRIO
;
return (result);
}
/* compare_state - the comparison function for sorting by process state */
static int
compare_state(pp1, pp2)
struct proc **pp1, **pp2;
{
struct kinfo_proc2 *p1;
struct kinfo_proc2 *p2;
int result;
pctcpu lresult;
/* remove one level of indirection */
p1 = *(struct kinfo_proc2 **) pp1;
p2 = *(struct kinfo_proc2 **) pp2;
ORDERKEY_STATE
ORDERKEY_PCTCPU
ORDERKEY_CPTICKS
ORDERKEY_PRIO
ORDERKEY_RSSIZE
ORDERKEY_MEM
;
return (result);
}
/* compare_time - the comparison function for sorting by total cpu time */
static int
compare_time(pp1, pp2)
struct proc **pp1, **pp2;
{
struct kinfo_proc2 *p1;
struct kinfo_proc2 *p2;
int result;
pctcpu lresult;
/* remove one level of indirection */
p1 = *(struct kinfo_proc2 **) pp1;
p2 = *(struct kinfo_proc2 **) pp2;
ORDERKEY_CPTICKS
ORDERKEY_PCTCPU
ORDERKEY_STATE
ORDERKEY_PRIO
ORDERKEY_MEM
ORDERKEY_RSSIZE
;
return (result);
}
/*
* proc_owner(pid) - returns the uid that owns process "pid", or -1 if
* the process does not exist.
* It is EXTREMLY IMPORTANT that this function work correctly.
* If top runs setuid root (as in SVR4), then this function
* is the only thing that stands in the way of a serious
* security problem. It validates requests for the "kill"
* and "renice" commands.
*/
int
proc_owner(pid)
int pid;
{
int cnt;
struct kinfo_proc2 **prefp;
struct kinfo_proc2 *pp;
prefp = pref;
cnt = pref_len;
while (--cnt >= 0) {
pp = *prefp++;
if (pp->p_pid == (pid_t)pid)
return(pp->p_ruid);
}
return(-1);
}
/*
* percentages(cnt, out, new, old, diffs) - calculate percentage change
* between array "old" and "new", putting the percentages i "out".
* "cnt" is size of each array and "diffs" is used for scratch space.
* The array "old" is updated on each call.
* The routine assumes modulo arithmetic. This function is especially
* useful on BSD mchines for calculating cpu state percentages.
*/
void
percentages64(cnt, out, new, old, diffs)
int cnt;
int *out;
u_int64_t *new;
u_int64_t *old;
u_int64_t *diffs;
{
int i;
u_int64_t change;
u_int64_t total_change;
u_int64_t *dp;
u_int64_t half_total;
/* initialization */
total_change = 0;
dp = diffs;
/* calculate changes for each state and the overall change */
for (i = 0; i < cnt; i++) {
/*
* Don't worry about wrapping - even at hz=1GHz, a
* u_int64_t will last at least 544 years.
*/
change = *new - *old;
total_change += (*dp++ = change);
*old++ = *new++;
}
/* avoid divide by zero potential */
if (total_change == 0)
total_change = 1;
/* calculate percentages based on overall change, rounding up */
half_total = total_change / 2;
for (i = 0; i < cnt; i++)
*out++ = (int)((*diffs++ * 1000 + half_total) / total_change);
}
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