source: trunk/third/top/machine/m_macosx.c @ 16185

/*
 * m_macosx.c
 *
 * AUTHOR:      Andrew S. Townley
 *              based on m_bsd44.c and m_next32.c
 *              by Christos Zoulas and Tim Pugh
 * CREATED:     Tue Aug 11 01:51:35 CDT 1998
 * SYNOPSIS:  MacOS X Server (Rhapsody Developer Release 2)
 * DESCRIPTION:
 *      MacOS X Server (Rhapsody Developer Release 2)
 *
 * CFLAGS: -DHAVE_STRERROR
 * TERMCAP: none
 * MATH: none
 */

/*
 * normal stuff
 */

#include <stdio.h>
#include <stdarg.h>
#include <errno.h>
#include "top.h"
#include "machine.h"
#include "utils.h"

/*
 * MacOS kernel stuff
 */

#include <kvm.h>
#include <fcntl.h>
#include <sys/dkstat.h>
#include <sys/sysctl.h>
#include <mach/message.h>
#include <mach/vm_statistics.h>
#include <mach/mach.h>

#define VMUNIX          "/mach_kernel"
#define MEM             "/dev/mem"
#define SWAP            NULL

#define NUM_AVERAGES    3
#define LOG1024         10
#define MAX_COLS        128

#define PP(pp, field)   ((pp)->kp_proc . field)
#define EP(pp, field)   ((pp)->kp_eproc . field)
#define VP(pp, field)   ((pp)->kp_eproc.e_vm . field)
#define MPP(mp, field)  (PP((mp)->kproc, field))
#define MEP(mp, field)  (EP((mp)->kproc, field))
#define MVP(mp, field)  (VP((mp)->kproc, field))
#define TP(mp, field)   ((mp)->task_info . field)
#define RP(mp, field)   ((mp)->thread_summary . field)

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

/* what we consider to be process size: */
#define PROCSIZE(pp) (VP((pp), vm_tsize) + VP((pp), vm_dsize) + VP((pp), vm_ssize))
#define TASKSIZE(t) (TP(t, virtual_size) + TP(t, resident_size))

#define pctdouble(p) ((double)(p) / FSCALE)

/*
 * globals
 */

static kvm_t            *kd = NULL;
static int              nproc;
static int              onproc = -1;
static int              pref_len;
static long             maxmem;
static long             hz;
static char             fmt[MAX_COLS];
static double           logcpu = 1.0;

/* process array stuff */

static struct kinfo_proc        *kproc_list = NULL;
static struct macos_proc        *proc_list = NULL;
static struct macos_proc        **proc_ref = NULL;
static int                      process_states[7];
static struct handle            handle;

/*
 * The mach information hopefully will not be necessary
 * when the kvm_* interfaces are supported completely.
 *
 * Since we're only concerned with task and thread info
 * for 'interesting' processes, we're going to only allocate
 * as many task and thread structures as needed.
 */

static struct task_basic_info   *task_list = NULL;

/* memory statistics */

static int              pageshift       = 0;
static int              pagesize        = 0;
#define pagetok(size)   ((size) << pageshift)

static int              swappgsin       = -1;
static int              swappgsout      = -1;
static vm_statistics_data_t     vm_stats;
static int              memory_stats[7];

/* CPU state percentages */

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

/*
 * types
 */

typedef long            pctcpu;

//struct statics
//{
//      char    **procstate_names;
//      char    **cpustate_names;
//      char    **memory_names;
//      char    **order_names;
//};
//
//struct system_info
//{
//      int     last_pid;
//      double  load_avg[NUM_AVERAGES];
//      int     p_total;        /* total # of processes */
//      int     p_active;       /* number processes considered active */
//      int     *procstates;
//      int     *cpustates;
//      int     *memory;
//};
//
//struct process_select
//{
//      int     idle;           /* show idle processes */
//      int     system;         /* show system processes */
//      int     uid;            /* show only this uid (unless -1) */
//      char    *command;       /* only this command (unless NULL) */
//};

/*
 * We need to declare a hybrid structure which will store all
 * of the stuff we care about for each process.
 */

struct macos_proc
{
        struct kinfo_proc               *kproc;
        task_t                          the_task;
        struct task_basic_info          task_info;
        int                             thread_count;
        struct thread_basic_info        thread_summary;
};

struct handle
{
        struct macos_proc               **next_proc;
        int                             remaining;
};

static char header[] =
  "  PID X        PRI THRD  SIZE   RES STATE   TIME    MEM    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%% %.16s"

/*
 * puke()
 *
 * This function is used to report errors to stderr.
 */

static void puke(const char* fmt, ...)
{
        va_list args;
        va_start(args, fmt);
        vfprintf(stderr, fmt, args);
        va_end(args);

        fputc('\n', stderr);
        fflush(stderr);
}

/*
 * kread()
 *
 * This function is a wrapper for the kvm_read() function
 * with the addition of a message parameter per kvm_open().
 *
 * All other behavior is per kvm_read except the error reporting.
 */

static ssize_t kread(u_long addr, void *buf, 
        size_t nbytes, const char *errstr)
{
        ssize_t s = 0;

        s = kvm_read(kd, addr, buf, nbytes);
        if(s == -1)
                {
                puke("error:  kvm_read() failed for '%s' (%s)\n",
                        errstr, strerror(errno));
                }

        return s;
}

/*
 * prototypes for functions which top needs
 */

char *format_header(register char *uname_field);
char *format_next_process(caddr_t handle, char *(*getuserid)());
caddr_t get_process_info(struct system_info *si, struct process_select *sel, int (*compare)());
int get_system_info(struct system_info *si);
int machine_init(struct statics *stat);
char *printable();

/*
 * definitions for offsets
 */

#define X_NPROC         0
#define X_CP_TIME       1
#define X_HZ            2
#define X_MAXMEM        3

#define NLIST_LAST      4

static struct nlist     nlst[] =
{
        { "_maxproc" },         /* 0 *** maximum processes */
        { "_cp_time" },         /* 1 */
        { "_hz" },              /* 2 */
        { "_mem_size" },        /* 3 */
        { 0 }
};

static char *procstates[] =
{
        "",
        " starting, ",
        " running, ",
        " sleeping, ",
        " stopped, ",
        " zombie, ",
        " swapped ",
        NULL
};

static char *cpustates[] =
{
        "user",
        "nice",
        "system",
        "intr",
        "idle",
        NULL
};

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

static char *mach_state[] =
{
        "",
        "R",
        "T",
        "S",
        "U",
        "H"
};

static char *thread_state[] =
{
        "",
        "run\0\0\0",
        "stop",
        "wait",
        "uwait",
        "halted",
};

static char *flags_state[] =
{
        "",
        "W",
        "I"
};

static char *memnames[] =
{
        "K Tot, ",
        "K Free, ",
        "K Act, ",
        "K Inact, ",
        "K Wired, ",
        "K in, ",
        "K out ",
        NULL
};

/*
 * format_header()
 *
 * This function is used to add the username into the
 * header information.
 */

char *format_header(register char *uname_field)
{
        register char *ptr;

        ptr = header + UNAME_START;
        while(*uname_field != NULL)
                *ptr++ = *uname_field++;

        return(header);
}

/*
 * format_next_process()
 *
 * This function actuall is responsible for the formatting of
 * each row which is displayed.
 */

char *format_next_process(caddr_t handle, char *(*getuserid)())
{
        register struct macos_proc      *pp;
        register long                   cputime;
        register double                 pct;
        register int                    vsize;
        register int                    rsize;
        struct handle                   *hp;

        /*
         * we need to keep track of the next proc structure.
         */

        hp = (struct handle*)handle;
        pp = *(hp->next_proc++);
        hp->remaining--;

        /*
         * get the process structure and take care of the cputime
         */

        if((MPP(pp, p_flag) & P_INMEM) == 0)
                {
                /* we want to print swapped processes as <pname> */
                char    *comm = MPP(pp, p_comm);
#define COMSIZ  sizeof(MPP(pp, p_comm))
                char    buf[COMSIZ];
                strncpy(buf, comm, COMSIZ);
                comm[0] = '<';
                strncpy(&comm[1], buf, COMSIZ - 2);
                comm[COMSIZ - 2] = '\0';
                strncat(comm, ">", COMSIZ - 1);
                comm[COMSIZ - 1] = '\0';
                }

        /*
         * count the cpu time, but ignore the interrupts
         *
         * At the present time (DR2 8/1998), MacOS X doesn't
         * correctly report this information through the
         * kinfo_proc structure.  We need to get it from the
         * task threads.
         *
         * cputime = PP(pp, p_rtime).tv_sec;
         */
        
        cputime = RP(pp, user_time).seconds + RP(pp, system_time).seconds;

        /*
         * calculate the base cpu percentages
         *
         * Again, at the present time, MacOS X doesn't report
         * this information through the kinfo_proc.  We need
         * to talk to the threads.
         */

//      pct = pctdouble(PP(pp, p_pctcpu));
        pct = (double)(RP(pp, cpu_usage))/TH_USAGE_SCALE;

        /*
         * format the entry
         */

        /*
         * In the final version, I would expect this to work correctly,
         * but it seems that not all of the fields in the proc
         * structure are being used.
         *
         * For now, we'll attempt to get some of the things we need
         * from the mach task info.
         */

        sprintf(fmt,
                Proc_format,
                MPP(pp, p_pid),
                (*getuserid)(MEP(pp, e_pcred.p_ruid)),
                TP(pp, base_priority),
                pp->thread_count,
                format_k(TASKSIZE(pp) / 1024),
                format_k(pagetok((MVP(pp, vm_rssize)))),
                state_abbrev[(u_char)MPP(pp, p_stat)],
                format_time(cputime),
                100.0 * TP(pp, resident_size) / maxmem,
//              100.0 * weighted_cpu(pct, (RP(pp, user_time).seconds + RP(pp, system_time).seconds)),
                100.0 * pct,
                printable(MPP(pp, p_comm)));

        return(fmt);
}

/*
 * get_process_info()
 *
 * This function returns information about the processes
 * on the system.
 */

caddr_t get_process_info(struct system_info *si,
                struct process_select *sel, int (*compare)())

{
        register int                            i;
        register int                            total_procs;
        register int                            active_procs;
        register struct macos_proc              **prefp;
        register struct macos_proc              *pp;
        register struct kinfo_proc              *pp2;
        register struct kinfo_proc              **prefp2;
        register struct thread_basic_info       *thread;

        /*
         * these are copied out of sel for speed
         */

        int show_idle;
        int show_system;
        int show_uid;
        int show_command;

        kproc_list = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nproc);

        if(nproc > onproc)
                {
                proc_list = (struct macos_proc*)realloc(proc_list, sizeof(struct macos_proc) * nproc);
                proc_ref = (struct macos_proc **)realloc(proc_ref, sizeof(struct macos_proc *) * (onproc = nproc));
                }

        if(proc_ref == NULL || proc_list == NULL || kproc_list == NULL)
                {
                puke("error:  out of memory (%s)", strerror(errno));
                return(NULL);
                }

        /*
         * now, our task is to build the array of information we
         * need to function correctly.  This involves setting a pointer
         * to each real kinfo_proc structure returned by kvm_getprocs()
         * in addition to getting the mach information for each of
         * those processes.
         */

        for(pp2 = kproc_list, i = 0; i < nproc; pp2++, i++)
                {
                kern_return_t   rc;
                u_int           info_count = TASK_BASIC_INFO_COUNT;

                /*
                 * first, we set the pointer to the reference in
                 * the kproc list.
                 */
                
                proc_list[i].kproc = pp2;

                /*
                 * then, we load all of the task info for the process
                 */

                if(PP(pp2, p_stat) != SZOMB)
                        {
                        rc = task_by_unix_pid(task_self(), 
                                PP(pp2, p_pid), 
                                &(proc_list[i].the_task));

                        if(rc != KERN_SUCCESS)
                                {
                                puke("error:  get task info for pid %d failed with rc = %d", PP(pp2, p_pid), rc);
                                }

                        /*
                         * load the task information
                         */

                        rc = task_info(proc_list[i].the_task, TASK_BASIC_INFO, 
                                (task_info_t)&(proc_list[i].task_info),
                                &info_count);

                        if(rc != KERN_SUCCESS)
                                {
                                puke("error:  couldn't get task info (%s); rc = %d", strerror(errno), rc);
                                }

                        /*
                         * load the thread summary information
                         */

                        load_thread_info(&proc_list[i]);
                        }
                }

        /* 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 = proc_ref;
        for(pp = proc_list, i = 0; i < nproc; pp++, i++)
                {
                /*
                 *  Place pointers to each valid proc structure in 
                 * proc_ref[].  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(MPP(pp, p_stat) != 0 && 
                                (show_system || ((MPP(pp, p_flag) & P_SYSTEM) == 0)))
                        {
                        total_procs++;
                        process_states[(unsigned char) MPP(pp, p_stat)]++;
                        if((MPP(pp, p_stat) != SZOMB) &&
                                        (show_idle || (MPP(pp, p_pctcpu) != 0) || 
                                        (MPP(pp, p_stat) == SRUN)) &&
                                        (!show_uid || MEP(pp, e_pcred.p_ruid) == (uid_t)sel->uid))
                                {
                                *prefp++ = pp;
                                active_procs++;
                                }
                        }
                }
        
        /* 
         * if requested, sort the "interesting" processes
         */

        if(compare != NULL)
                qsort((char *)proc_ref, active_procs, sizeof(struct macos_proc *), 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 = proc_ref;
        handle.remaining = active_procs;
        return((caddr_t)&handle);
}

/*
 * get_system_info()
 *
 * This function is responsible for geting the periodic
 * system information snapshot.
 */

int get_system_info(struct system_info *si)
{
        register long   total;
        register int    i;

        /*
         * get the cp_time array
         */

        if(!kread(nlst[X_CP_TIME].n_value, cp_time,
                        sizeof(cp_time), nlst[X_CP_TIME].n_name))
                return(0);

#ifdef MAX_VERBOSE

        /*
         * print out the entries
         */

        for(i = 0; i < CPUSTATES; i++)
                printf("cp_time[%d] = %d\n", i, cp_time[i]);

#endif /* MAX_VERBOSE */

        /*
         * get the load averages
         */

        if(kvm_getloadavg(kd, si->load_avg, NUM_AVERAGES) == -1)
                {
                puke("error:  kvm_getloadavg() failed (%s)", strerror(errno));
                return(0);
                }

#ifdef MAX_VERBOSE
        printf("%-30s%03.2f, %03.2f, %03.2f\n", 
                        "load averages:", 
                        si->load_avg[0],
                        si->load_avg[1],
                        si->load_avg[2]);
#endif /* MAX_VERBOSE */

        total = percentages(CPUSTATES, cpu_states, cp_time, cp_old, cp_diff);
        /*
         * get the memory statistics
         */

        {
                kern_return_t   status;
                status = vm_statistics(task_self(), &vm_stats);

                if(status != KERN_SUCCESS)
                        {
                        puke("error:  vm_statistics() failed (%s)", strerror(errno));
                        return(0);
                        }

                /*
                 * we already have the total memory, we just need
                 * to get it in the right format.
                 */

                memory_stats[0] = pagetok(maxmem / vm_stats.pagesize);
                memory_stats[1] = pagetok(vm_stats.free_count);
                memory_stats[2] = pagetok(vm_stats.active_count);
                memory_stats[3] = pagetok(vm_stats.inactive_count);
                memory_stats[4] = pagetok(vm_stats.wire_count);

                if(swappgsin < 0)
                        {
                        memory_stats[5] = 1;
                        memory_stats[6] = 1;
                        }
                else
                        {
                        memory_stats[5] = pagetok(((vm_stats.pageins - swappgsin)));
                        memory_stats[6] = pagetok(((vm_stats.pageouts - swappgsout)));
                        }
                swappgsin = vm_stats.pageins;
                swappgsout = vm_stats.pageouts;
        }
        
        si->cpustates = cpu_states;
        si->memory = memory_stats;
        si->last_pid = -1;

        return(1);
}

/*
 * machine_init()
 *
 * This function is responsible for filling in the values of the
 * statics structure.
 */

int machine_init(struct statics *stat)
{
        register int rc = 0;
        register int i = 0;
//      register int pagesize;

        /*
         * open the kernel
         */

        if((kd = kvm_open(VMUNIX, MEM, SWAP, O_RDONLY, "kvm_open")) == NULL)
                {
                puke("error:  couldn't open kernel (%s)", strerror(errno));
                return(0);
                }

        /*
         * turn off super-user privs
         */

//      seteuid(getuid());

        /*
         * read the nlist we need
         */
        
        rc = kvm_nlist(kd, nlst);
        if(rc == -1)
                {
                puke("error:  unable to read kernel table (%s)", strerror(errno));
                return(0);
                }

        if(rc > 0)
                {
                puke("error:  kvm_nlist() found %d invalid entries.\n", rc);
                return(0);
                }

#ifdef MAX_VERBOSE

        /*
         * print out the entries
         */

        for(i = 0; i < NLIST_LAST; i++)
                {
                printf("symbol %10s is type 0x%02X at offset 0x%02X\n", 
                        nlst[i].n_name, 
                        nlst[i].n_type & N_TYPE, 
                        nlst[i].n_value);
                }

#endif /* MAX_VERBOSE */

        /*
         * next, we get the data for the names
         *
         * get max number of processes
         */

        if(!kread(nlst[X_NPROC].n_value, &nproc,
                        sizeof(nproc), nlst[X_NPROC].n_name))
                return(0);

#ifdef MAX_VERBOSE
        printf("%-30s%10d\n", "max number of processes:", nproc);
#endif /* MAX_VERBOSE */

        /*
         * get clock rate
         */

        if(!kread(nlst[X_HZ].n_value, &hz,
                        sizeof(hz), nlst[X_HZ].n_name))
                return(0);

#ifdef MAX_VERBOSE
        printf("%-30s%10d\n", "clock rate:", hz);
#endif /* MAX_VERBOSE */

        /*
         * get memory size
         */

        if(!kread(nlst[X_MAXMEM].n_value, &maxmem,
                        sizeof(maxmem), nlst[X_MAXMEM].n_name))
                return(0);

#ifdef MAX_VERBOSE
        printf("%-30s%10d\n", "total system memory:", maxmem);
#endif /* MAX_VERBOSE */

        /*
         * calculate the pageshift from the system page size
         */

        pagesize = getpagesize();
        pageshift = 0;
        while((pagesize >>= 1) > 0)
                pageshift++;

        pageshift -= LOG1024;

        /*
         * fill in the statics information
         */

        stat->procstate_names = procstates;
        stat->cpustate_names = cpustates;
        stat->memory_names = memnames;

        return(0);
}

/* comparison routine for qsort */

/*
 *  proc_compare - comparison function for "qsort"
 *      Compares the resource consumption of two processes using five
 *      distinct keys.  The keys (in descending order of importance) are:
 *      percent cpu, cpu ticks, 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.
 */

static unsigned char sorted_state[] =
{
    0,  /* not used             */
    3,  /* sleep                */
    1,  /* ABANDONED (WAIT)     */
    6,  /* run                  */
    5,  /* start                */
    2,  /* zombie               */
    4   /* stop                 */
};
 
int proc_compare(struct macos_proc **pp1, struct macos_proc **pp2)
{
    register struct macos_proc *p1;
    register struct macos_proc *p2;
    register int result;
    register pctcpu lresult;

    /* remove one level of indirection */
    p1 = *(struct macos_proc **) pp1;
    p2 = *(struct macos_proc **) pp2;

    /* compare percent cpu (pctcpu) */
    if ((lresult = RP(p2, cpu_usage) - RP(p1, cpu_usage)) == 0)
    {
        /* use cpticks to break the tie */
        if ((result = MPP(p2, p_cpticks) - MPP(p1, p_cpticks)) == 0)
        {
            /* use process state to break the tie */
            if ((result = sorted_state[(unsigned char) MPP(p2, p_stat)] -
                          sorted_state[(unsigned char) MPP(p1, p_stat)])  == 0)
            {
                /* use priority to break the tie */
                if ((result = MPP(p2, p_priority) - MPP(p1, p_priority)) == 0)
                {
                    /* use resident set size (rssize) to break the tie */
                    if ((result = MVP(p2, vm_rssize) - MVP(p1, vm_rssize)) == 0)
                    {
                        /* use total memory to break the tie */
                        result = PROCSIZE(p2->kproc) - PROCSIZE(p1->kproc);
                    }
                }
            }
        }
    }
    else
    {
        result = lresult < 0 ? -1 : 1;
    }

    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;

{
    register int cnt;
    register struct macos_proc **prefp;
    register struct macos_proc *pp;

    prefp = proc_ref;
    cnt = pref_len;
    while (--cnt >= 0)
    {
        pp = *prefp++;  
        if (MPP(pp, p_pid) == (pid_t)pid)
        {
            return((int)MEP(pp, e_pcred.p_ruid));
        }
    }
    return(-1);
}

/*
 * load_thread_info()
 *
 * This function will attempt to load the thread summary info
 * for a Mach task.  The task is located as part of the macos_proc
 * structure.
 *
 * returns the kern_return_t value of any failed call or KERN_SUCCESS
 * if everything works.
 */

int load_thread_info(struct macos_proc *mp)
{
        register kern_return_t          rc = 0;
        register int                    i = 0;
        register int                    t_utime = 0;
        register int                    t_stime = 0;
        register int                    t_cpu = 0;
        register int                    t_state = 0;
        register task_t                 the_task = mp->the_task;

        thread_array_t                  thread_list = NULL;

        /*
         * We need to load all of the threads for the 
         * given task so we can get the performance 
         * data from them.
         */

        mp->thread_count = 0;
        rc = task_threads(the_task, &thread_list, &(mp->thread_count));

        if(rc != KERN_SUCCESS)
                {
//              puke("error:  unable to load threads for task (%s); rc = %d", strerror(errno), rc);
                return(rc);
                }

        /*
         * now, for each of the threads, we need to sum the stats
         * so we can present the whole thing to the caller.
         */

        for(i = 0; i < mp->thread_count; i++)
                {
                struct thread_basic_info        t_info;
                int                             icount = THREAD_BASIC_INFO_COUNT;
                kern_return_t                   rc = 0;

                rc = thread_info(thread_list[i], THREAD_BASIC_INFO, 
                                (thread_info_t)&t_info, &icount);

                if(rc != KERN_SUCCESS)
                        {
                        puke("error:  unable to load thread info for task (%s); rc = %d", strerror(errno), rc);
                        return(rc);
                        }

                t_utime += t_info.user_time.seconds;
                t_stime += t_info.system_time.seconds;
                t_cpu += t_info.cpu_usage;
                }

        vm_deallocate(task_self(), (vm_address_t)thread_list, sizeof(thread_array_t)*(mp->thread_count));

        /*
         * Now, we load the values in the structure above.
         */

        RP(mp, user_time).seconds = t_utime;
        RP(mp, system_time).seconds = t_stime;
        RP(mp, cpu_usage) = t_cpu;

        return(KERN_SUCCESS);
}