m_hpux9.c

查看系统硬件和内存资源使用情况；以及各个进程的使用情况

/*
 * top - a top users display for Unix
 *
 * SYNOPSIS:  any hp9000 running hpux version 9
 *
 * DESCRIPTION:
 * This is the machine-dependent module for HPUX 9.
 * This makes top work on (at least) the following systems:
 *	hp9000s800
 *	hp9000s700
 * This may make top work on the following, but we aren't sure:
 *	hp9000s300
 *
 * LIBS: 
 *
 * CFLAGS: -DHAVE_GETOPT
 *
 * AUTHOR: Kevin Schmidt <[e-mail]> 
 *         adapted from Christos Zoulas <[e-mail]>
 */

#include <sys/types.h>
#include <sys/signal.h>
#include <sys/param.h>

#include <stdio.h>
#include <nlist.h>
#include <math.h>
#include <sys/dir.h>
#include <sys/user.h>
#include <sys/proc.h>
#include <sys/dk.h>
#include <sys/vm.h>
#include <sys/file.h>
#include <sys/time.h>
#ifndef hpux
# define P_RSSIZE(p) (p)->p_rssize
# define P_TSIZE(p) (p)->p_tsize
# define P_DSIZE(p) (p)->p_dsize
# define P_SSIZE(p) (p)->p_ssize
#else
# include <sys/pstat.h>
# define __PST2P(p, field) \
    ((p)->p_upreg ? ((struct pst_status *) (p)->p_upreg)->field : 0)
# define P_RSSIZE(p) __PST2P(p, pst_rssize)
# define P_TSIZE(p) __PST2P(p, pst_tsize)
# define P_DSIZE(p) __PST2P(p, pst_dsize)
# define P_SSIZE(p) __PST2P(p, pst_ssize)
# ifdef __hp9000s700
#  define p_percentcpu(p) ((p)->p_pctcpu)
#  define p_time_exact(p) ((p)->p_time)
# else
/* The following 4 #defines are per HPUX-9.0's <sys/proc.h> */
#  define PCT_NORM 9       /* log2(PCT_BASE) */
#  define PCT_BASE (1<<PCT_NORM)
#  define p_percentcpu(p) ((p)->p_fractioncpu/(float)(PCT_BASE*HZ))
#  define p_time_exact(p) (time.tv_sec-((p)->p_swaptime))
# endif /* __hp9000s700 */
#endif /* hpux */

#include "top.h"
#include "machine.h"
#include "utils.h"

#define VMUNIX	"/hp-ux"
#define KMEM	"/dev/kmem"
#define MEM	"/dev/mem"
#ifdef DOSWAP
#define SWAP	"/dev/dmem"
#endif

/* get_process_info passes back a handle.  This is what it looks like: */

struct handle
{
    struct proc **next_proc;	/* points to next valid proc pointer */
    int remaining;		/* number of pointers remaining */
};

/* declarations for load_avg */
#include "loadavg.h"

/* define what weighted cpu is.  */
#define weighted_cpu(pct, pp) ((p_time_exact(pp)) == 0 ? 0.0 : \
			 ((pct) / (1.0 - exp((p_time_exact(pp)) * logcpu))))

/* what we consider to be process size: */
#define PROCSIZE(pp) (P_TSIZE(pp) + P_DSIZE(pp) + P_SSIZE(pp))

/* definitions for indices in the nlist array */
#define X_AVENRUN	0
#define X_CCPU		1
#define X_NPROC		2
#define X_PROC		3
#define X_TOTAL		4
#define X_CP_TIME	5
#define X_MPID		6

/*
 * Steinar Haug from University of Trondheim, NORWAY pointed out that 
 * the HP 9000 system 800 doesn't have _hz defined in the kernel.  He
 * provided a patch to work around this.  We've improved on this patch
 * here and set the constant X_HZ only when _hz is available in the
 * kernel.  Code in this module that uses X_HZ is surrounded with
 * appropriate ifdefs.
 */

#ifndef hp9000s300
#define X_HZ		7
#endif


static struct nlist nlst[] = {
    { "_avenrun" },		/* 0 */
    { "_cexp" },		/* 1 */
    { "_nproc" },		/* 2 */
    { "_proc" },		/* 3 */
    { "_total" },		/* 4 */
    { "_cp_time" },		/* 5 */
    { "_mpid" },		/* 6 */
#ifdef X_HZ
    { "_hz" },			/* 7 */
#endif
    { 0 }
};

/*
 *  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 %5s %5s %-5s %6s %5.2f%% %5.2f%% %s"

/* process state names for the "STATE" column of the display */
/* the extra nulls in the string "run" are for adding a slash and
   the processor number when needed */

char *state_abbrev[] =
{
    "", "sleep", "WAIT", "run\0\0\0", "start", "zomb", "stop"
};


static int kmem;

/* values that we stash away in _init and use in later routines */

static double logcpu;

/* these are retrieved from the kernel in _init */

static unsigned long proc;
static          int  nproc;
static          long hz;
static load_avg  ccpu;
static          int  ncpu = 0;

/* these are offsets obtained via nlist and used in the get_ functions */
static unsigned long mpid_offset;
static unsigned long avenrun_offset;
static unsigned long total_offset;
static unsigned long cp_time_offset;

/* these are for calculating cpu state percentages */

static long cp_time[CPUSTATES];
static long cp_old[CPUSTATES];
static long cp_diff[CPUSTATES];

/* these are for detailing the process states */

int process_states[7];
char *procstatenames[] = {
    "", " sleeping, ", " ABANDONED, ", " running, ", " starting, ",
    " zombie, ", " stopped, ",
    NULL
};

/* these are for detailing the cpu states */

int cpu_states[9];
char *cpustatenames[] = {
    "usr", "nice", "sys", "idle", "", "", "", "intr", "ker",
    NULL
};

/* these are for detailing the memory statistics */

int memory_stats[8];
char *memorynames[] = {
    "Real: ", "K/", "K act/tot  ", "Virtual: ", "K/",
    "K act/tot  ", "Free: ", "K", NULL
};

/* these are for keeping track of the proc array */

static int bytes;
static int pref_len;
static struct proc *pbase;
static struct proc **pref;
static struct pst_status *pst;

/* 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)

/* useful externals */
extern int errno;
extern char *sys_errlist[];

long lseek();
long time();

machine_init(statics)

struct statics *statics;

{
    register int i = 0;
    register int pagesize;

    if ((kmem = open(KMEM, O_RDONLY)) == -1) {
	perror(KMEM);
	return(-1);
    }
#ifdef hp9000s800
    /* 800 names don't have leading underscores */
    for (i = 0; nlst[i].n_name; nlst[i++].n_name++)
	continue;
#endif

    /* get the list of symbols we want to access in the kernel */
    (void) nlist(VMUNIX, nlst);
    if (nlst[0].n_type == 0)
    {
	fprintf(stderr, "top: nlist failed\n");
	return(-1);
    }

    /* make sure they were all found */
    if (check_nlist(nlst) > 0)
    {
	return(-1);
    }

    /* get the symbol values out of kmem */
    (void) getkval(nlst[X_PROC].n_value,   (int *)(&proc),	sizeof(proc),
	    nlst[X_PROC].n_name);
    (void) getkval(nlst[X_NPROC].n_value,  &nproc,		sizeof(nproc),
	    nlst[X_NPROC].n_name);
    (void) getkval(nlst[X_CCPU].n_value,   (int *)(&ccpu),	sizeof(ccpu),
	    nlst[X_CCPU].n_name);
#ifdef X_HZ
    (void) getkval(nlst[X_HZ].n_value,     (int *)(&hz),	sizeof(hz),
	    nlst[X_HZ].n_name);
#else
    hz = HZ;
#endif

    /* stash away certain offsets for later use */
    mpid_offset = nlst[X_MPID].n_value;
    avenrun_offset = nlst[X_AVENRUN].n_value;
    total_offset = nlst[X_TOTAL].n_value;
    cp_time_offset = nlst[X_CP_TIME].n_value;

    /* this is used in calculating WCPU -- calculate it ahead of time */
    logcpu = log(loaddouble(ccpu));

    /* allocate space for proc structure array and array of pointers */
    bytes = nproc * sizeof(struct proc);
    pbase = (struct proc *)malloc(bytes);
    pref  = (struct proc **)malloc(nproc * sizeof(struct proc *));
    pst   = (struct pst_status *)malloc(nproc * sizeof(struct pst_status));

    /* Just in case ... */
    if (pbase == (struct proc *)NULL || pref == (struct proc **)NULL)
    {
	fprintf(stderr, "top: can't allocate sufficient memory\n");
	return(-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;

    /* all done! */
    return(0);
}

char *format_header(uname_field)

register char *uname_field;

{
    register char *ptr;

    ptr = header + UNAME_START;
    while (*uname_field != '\0')
    {
	*ptr++ = *uname_field++;
    }

    return(header);
}

get_system_info(si)

struct system_info *si;

{
    load_avg avenrun[3];
    long total;

    /* get the cp_time array */
    (void) getkval(cp_time_offset, (int *)cp_time, sizeof(cp_time),
		   "_cp_time");

    /* get load average array */
    (void) getkval(avenrun_offset, (int *)avenrun, sizeof(avenrun),
		   "_avenrun");

    /* get mpid -- process id of last process */
    (void) getkval(mpid_offset, &(si->last_pid), sizeof(si->last_pid),
		   "_mpid");

    /* convert load averages to doubles */
    {
	register int i;
	register double *infoloadp;
	register load_avg *sysloadp;

	infoloadp = si->load_avg;
	sysloadp = avenrun;
	for (i = 0; i < 3; i++)
	{
	    *infoloadp++ = loaddouble(*sysloadp++);
	}
    }

    /* convert cp_time counts to percentages */
    total = percentages(CPUSTATES, cpu_states, cp_time, cp_old, cp_diff);

    /* sum memory statistics */
    {
	struct vmtotal total;

	/* get total -- systemwide main memory usage structure */
	(void) getkval(total_offset, (int *)(&total), sizeof(total),
		       "_total");
	/* convert memory stats to Kbytes */
	memory_stats[0] = -1;
	memory_stats[1] = pagetok(total.t_arm);
	memory_stats[2] = pagetok(total.t_rm);
	memory_stats[3] = -1;
	memory_stats[4] = pagetok(total.t_avm);
	memory_stats[5] = pagetok(total.t_vm);
	memory_stats[6] = -1;
	memory_stats[7] = pagetok(total.t_free);
    }

    /* set arrays and strings */
    si->cpustates = cpu_states;
    si->memory = memory_stats;
}

static struct handle handle;

caddr_t get_process_info(si, sel, compare)

struct system_info *si;
struct process_select *sel;
int (*compare)();

{
    register int i;
    register int total_procs;
    register int active_procs;
    register struct proc **prefp;
    register struct proc *pp;

    /* these are copied out of sel for speed */
    int show_idle;
    int show_system;