minix/commands/simple/top.c

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7.2 KiB
C
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2006-03-17 08:54:55 +01:00
/* Author: Ben Gras <beng@few.vu.nl> 17 march 2006 */
#define _MINIX 1
#define _POSIX_SOURCE 1
#include <stdio.h>
#include <pwd.h>
#include <curses.h>
#include <timers.h>
#include <unistd.h>
#include <stdlib.h>
#include <limits.h>
#include <termcap.h>
#include <termios.h>
#include <time.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioc_tty.h>
#include <sys/times.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/select.h>
#include <minix/ipc.h>
#include <minix/config.h>
#include <minix/type.h>
#include <minix/const.h>
#include "../../servers/pm/mproc.h"
#include "../../kernel/const.h"
#include "../../kernel/proc.h"
#define TC_BUFFER 1024 /* Size of termcap(3) buffer */
#define TC_STRINGS 200 /* Enough room for cm,cl,so,se */
char *Tclr_all;
int print_memory(struct pm_mem_info *pmi)
{
int h;
int largest_bytes = 0, total_bytes = 0;
for(h = 0; h < _NR_HOLES; h++) {
if(pmi->pmi_holes[h].h_base && pmi->pmi_holes[h].h_len) {
int bytes;
bytes = pmi->pmi_holes[h].h_len << CLICK_SHIFT;
if(bytes > largest_bytes) largest_bytes = bytes;
total_bytes += bytes;
}
}
printf("Mem: %dK Free, %dK Contiguous Free\n",
total_bytes/1024, largest_bytes/1024);
return 1;
}
int print_load(double *loads, int nloads)
{
int i;
printf("load averages: ");
for(i = 0; i < nloads; i++)
printf("%s %.2f", (i > 0) ? "," : "", loads[i]);
printf("\n");
return 1;
}
#define PROCS (NR_PROCS+NR_TASKS)
int print_proc_summary(struct proc *proc)
{
int p, alive, running, sleeping;
alive = running = sleeping = 0;
for(p = 0; p < PROCS; p++) {
if(p - NR_TASKS == IDLE)
continue;
if(proc[p].p_rts_flags & SLOT_FREE)
continue;
alive++;
if(proc[p].p_rts_flags & ~SLOT_FREE)
sleeping++;
else
running++;
}
printf("%d processes: %d running, %d sleeping\n",
alive, running, sleeping);
return 1;
}
static struct tp {
struct proc *p;
int ticks;
} tick_procs[PROCS];
int cmp_ticks(const void *v1, const void *v2)
{
struct tp *p1 = (struct tp *) v1, *p2 = (struct tp *) v2;
if(p1->ticks < p2->ticks)
return 1;
if(p1->ticks > p2->ticks)
return -1;
if(p1->p->p_nr < p2->p->p_nr)
return -1;
if(p1->p->p_nr > p2->p->p_nr)
return 1;
return 0;
}
void print_procs(int maxlines,
struct proc *proc1, struct proc *proc2, int dt,
struct mproc *mproc)
{
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int p, nprocs, tot=0;
int idleticks = 0, kernelticks = 0, systemticks = 0;
if(dt < 1) return;
for(p = nprocs = 0; p < PROCS; p++) {
if(proc2[p].p_rts_flags & SLOT_FREE)
continue;
tick_procs[nprocs].p = proc2 + p;
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if(proc1[p].p_endpoint == proc2[p].p_endpoint) {
tick_procs[nprocs].ticks =
proc2[p].p_user_time-proc1[p].p_user_time;
} else {
tick_procs[nprocs].ticks =
proc2[p].p_user_time;
}
if(p-NR_TASKS == IDLE) {
idleticks = tick_procs[nprocs].ticks;
continue;
}
/* Kernel task time, not counting IDLE */
if(proc2[p].p_nr < 0)
kernelticks += tick_procs[nprocs].ticks;
else if(mproc[proc2[p].p_nr].mp_procgrp == 0)
systemticks += tick_procs[nprocs].ticks;
nprocs++;
}
qsort(tick_procs, nprocs, sizeof(tick_procs[0]), cmp_ticks);
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printf("CPU states: %5.2f%% user, %5.2f%% system, %5.2f%% kernel, %5.2f%% idle",
100.0*(dt-systemticks-kernelticks-idleticks)/dt,
100.0*systemticks/dt,
100.0*kernelticks/dt,
100.0*idleticks/dt);
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printf("\n\n");
maxlines -= 2;
printf(" PID USERNAME PRI NICE SIZE STATE TIME CPU COMMAND\n");
maxlines--;
for(p = 0; p < nprocs; p++) {
int euid = 0;
struct passwd *who = NULL;
struct proc *pr;
int pnr, ticks;
char *name = "";
if(maxlines-- <= 0) break;
pnr = tick_procs[p].p->p_nr;
pr = tick_procs[p].p;
ticks = pr->p_user_time;
if(pnr >= 0) {
printf("%5d ", mproc[pnr].mp_pid);
euid = mproc[pnr].mp_effuid;
name = mproc[pnr].mp_name;
} else {
printf("[%3d] ", pnr);
name = pr->p_name;
}
who = getpwuid(euid);
if(who && who->pw_name) printf("%-8s ", who->pw_name);
else if(pnr >= 0) printf("%8d ", mproc[pnr].mp_effuid);
else printf(" ");
printf(" %2d ", pr->p_priority);
if(pnr >= 0) {
printf(" %3d ", mproc[pnr].mp_nice);
} else printf(" ");
printf("%5dK",
((pr->p_memmap[T].mem_len +
pr->p_memmap[D].mem_len) << CLICK_SHIFT)/1024);
printf("%6s", pr->p_rts_flags ? "" : "RUN");
printf(" %3d:%02d ", (ticks/HZ/60), (ticks/HZ)%60);
printf("%5.2f%% %s\n",
100.0*tick_procs[p].ticks/dt, name);
}
}
void showtop(int r)
{
#define NLOADS 3
double loads[NLOADS];
int nloads, i, p, lines = 0;
static struct proc prev_proc[PROCS], proc[PROCS];
struct winsize winsize;
static struct pm_mem_info pmi;
static int prev_uptime, uptime;
static struct mproc mproc[NR_PROCS];
struct tms tms;
uptime = times(&tms);
if(ioctl(STDIN_FILENO, TIOCGWINSZ, &winsize) != 0) {
perror("TIOCGWINSZ");
fprintf(stderr, "TIOCGWINSZ failed\n");
exit(1);
}
if(getsysinfo(PM_PROC_NR, SI_MEM_ALLOC, &pmi) < 0) {
fprintf(stderr, "getsysinfo() for SI_MEM_ALLOC failed.\n");
exit(1);;
}
if(getsysinfo(PM_PROC_NR, SI_KPROC_TAB, proc) < 0) {
fprintf(stderr, "getsysinfo() for SI_KPROC_TAB failed.\n");
exit(1);
}
if(getsysinfo(PM_PROC_NR, SI_PROC_TAB, mproc) < 0) {
fprintf(stderr, "getsysinfo() for SI_PROC_TAB failed.\n");
exit(1);
}
if((nloads = getloadavg(loads, NLOADS)) != NLOADS) {
fprintf(stderr, "getloadavg() failed - %d loads\n", nloads);
exit(1);
}
printf("%s", Tclr_all);
lines += print_load(loads, NLOADS);
lines += print_proc_summary(proc);
lines += print_memory(&pmi);
if(winsize.ws_row > 0) r = winsize.ws_row;
print_procs(r - lines - 2, prev_proc,
proc, uptime-prev_uptime, mproc);
memcpy(prev_proc, proc, sizeof(prev_proc));
prev_uptime = uptime;
}
void init(int *rows)
{
char *term;
static char buffer[TC_BUFFER], strings[TC_STRINGS];
char *s = strings, *v;
*rows = 0;
if(!(term = getenv("TERM"))) {
fprintf(stderr, "No TERM set\n");
exit(1);
}
if ( tgetent( buffer, term ) != 1 ) {
fprintf(stderr, "tgetent failed for term %s\n", term);
exit(1);
}
if ( (Tclr_all = tgetstr( "cl", &s )) == NULL )
Tclr_all = "\f";
if((v = tgetstr ("li", &s)) != NULL)
sscanf(v, "%d", rows);
if(*rows < 1) *rows = 24;
if(!initscr()) {
fprintf(stderr, "initscr() failed\n");
exit(1);
}
cbreak();
nl();
}
void sigwinch(int sig) { }
int main(int argc, char *argv[])
{
int r, c, s = 0, orig;
init(&r);
while((c=getopt(argc, argv, "s:")) != EOF) {
switch(c) {
case 's':
s = atoi(optarg);
break;
default:
fprintf(stderr,
"Usage: %s [-s<secdelay>]\n", argv[0]);
return 1;
}
}
if(s < 1)
s = 2;
/* Catch window size changes so display is updated properly right away. */
signal(SIGWINCH, sigwinch);
while(1) {
fd_set fds;
int ns;
struct timeval tv;
showtop(r);
tv.tv_sec = s;
tv.tv_usec = 0;
FD_ZERO(&fds);
FD_SET(STDIN_FILENO, &fds);
if((ns=select(STDIN_FILENO+1, &fds, NULL, NULL, &tv)) < 0
&& errno != EINTR) {
perror("select");
sleep(1);
}
if(ns > 0 && FD_ISSET(STDIN_FILENO, &fds)) {
char c;
if(read(STDIN_FILENO, &c, 1) == 1) {
switch(c) {
case 'q':
return 0;
break;
}
}
}
}
return 0;
}