static int
get_load()
{
static int old_load = 0;
int u = 0, n = 0, s = 0, i, load;
four_cpu_numbers( &u, &n, &s, &i );
load = u + n + s;
old_load = (load + load + load + old_load) >> 2;
return old_load >> 10;
}
/*
* Calculates the number of tasks in each state (running, sleeping, etc.).
* Calculates the CPU time in each state (system, user, nice, etc).
* Calculates percent cpu usage for each task.
*/
void do_stats(proc_t** p, float elapsed_time, int pass)
{
proc_t *this;
int index, total_time, cpumap, i, n = 0;
int sleeping = 0, stopped = 0, zombie = 0, running = 0;
unsigned long system_ticks = 0, user_ticks = 0, nice_ticks = 0, idle_ticks;
static int prev_count = 0;
int stime, utime;
/* start with one 4K page as a reasonable allocate size */
static int save_history_size = sizeof(struct save_hist) * 204;
static struct save_hist *save_history;
struct save_hist *New_save_hist;
static int *s_ticks_o = NULL, *u_ticks_o = NULL,
*n_ticks_o = NULL, *i_ticks_o = NULL;
int s_ticks, u_ticks, n_ticks, i_ticks, t_ticks;
char str[128];
FILE *file;
if (!save_history)
save_history = xcalloc(NULL, save_history_size);
New_save_hist = xcalloc(NULL, save_history_size);
if(s_ticks_o == NULL) {
s_ticks_o = (int *)malloc(nr_cpu * sizeof(int));
u_ticks_o = (int *)malloc(nr_cpu * sizeof(int));
n_ticks_o = (int *)malloc(nr_cpu * sizeof(int));
i_ticks_o = (int *)malloc(nr_cpu * sizeof(int));
}
idle_ticks = 1000 * nr_cpu;
/*
* Make a pass through the data to get stats.
*/
index = 0;
while (p[n]->pid != -1) {
this = p[n];
switch (this->state) {
case 'S':
case 'D':
sleeping++;
break;
case 'T':
stopped++;
break;
case 'Z':
zombie++;
break;
case 'R':
running++;
break;
default:
/* Don't know how to handle this one. */
break;
}
/*
* Calculate time in this process. Time is sum of user time
* (utime) plus system time (stime).
*/
total_time = this->utime + this->stime;
if (index * sizeof(struct save_hist) >= save_history_size) {
save_history_size *= 2;
save_history = xrealloc(save_history, save_history_size);
New_save_hist = xrealloc(New_save_hist, save_history_size);
}
New_save_hist[index].ticks = total_time;
New_save_hist[index].pid = this->pid;
stime = this->stime;
utime = this->utime;
New_save_hist[index].stime = stime;
New_save_hist[index].utime = utime;
/* find matching entry from previous pass */
for (i = 0; i < prev_count; i++) {
if (save_history[i].pid == this->pid) {
total_time -= save_history[i].ticks;
stime -= save_history[i].stime;
utime -= save_history[i].utime;
i = prev_count;
}
}
/*
* Calculate percent cpu time for this task.
*/
this->pcpu = (total_time * 10 * 100/Hertz) / elapsed_time;
if (this->pcpu > 999)
this->pcpu = 999;
/*
* Calculate time in idle, system, user and niced tasks.
*/
idle_ticks -= this->pcpu;
system_ticks += stime;
user_ticks += utime;
if (this->nice > 0)
nice_ticks += this->pcpu;
/*
* If in Sun-mode, adjust cpu percentage not only for
* the cpu the process is running on, but for all cpu together.
*/
if(!Irixmode) {
this->pcpu /= nr_cpu;
}
index++;
n++;
}
if (idle_ticks < 0)
idle_ticks = 0;
system_ticks = (system_ticks * 10 * 100/Hertz) / elapsed_time;
user_ticks = (user_ticks * 10 * 100/Hertz) / elapsed_time;
/*
* Display stats.
*/
if (pass > 0 && show_stats) {
printf("%d processes: %d sleeping, %d running, %d zombie, "
"%d stopped",
n, sleeping, running, zombie, stopped);
PUTP(top_clrtoeol);
putchar('\n');
if (nr_cpu == 1 || CPU_states) {
/* BEGIN EXPERIMENTAL CODE */
/* Throw out the calculation above... TODO: remove calculation. */
four_cpu_numbers(&user_ticks,&nice_ticks,&system_ticks,&idle_ticks);
do{
unsigned long sum;
sum = user_ticks+nice_ticks+system_ticks+idle_ticks;
user_ticks = (user_ticks * 1000) / sum;
system_ticks = (system_ticks * 1000) / sum;
nice_ticks = (nice_ticks * 1000) / sum;
idle_ticks = (idle_ticks * 1000) / sum;
}while(0);
/* END EXPERIMENTAL CODE */
if (Irixmode) {
user_ticks *= nr_cpu;
system_ticks *= nr_cpu;
nice_ticks *= nr_cpu;
idle_ticks *= nr_cpu;
}
printf("CPU states:"
" %2ld.%ld%% user, %2ld.%ld%% system,"
" %2ld.%ld%% nice, %2ld.%ld%% idle",
user_ticks / 10UL, user_ticks % 10UL,
system_ticks / 10UL, system_ticks % 10UL,
nice_ticks / 10UL, nice_ticks % 10UL,
idle_ticks / 10UL, idle_ticks % 10UL);
PUTP(top_clrtoeol);
putchar('\n');
}
/*
* Calculate stats for all cpus
*/
if(nr_cpu > 1) {
file = fopen("/proc/stat", "r");
if(file == NULL) {
fprintf(stderr, "fopen failed on /proc/stat\n");
}
else {
/* Skip the total CPU states. */
if(fgets(str, 128, file) == NULL) {
fprintf(stderr, "fgets failed on /proc/stat\n");
}
else {
for(i = 0; i < nr_cpu; i++) {
if(fscanf(file, "cpu%*d %d %d %d %d\n",
&u_ticks, &n_ticks, &s_ticks, &i_ticks) != 4) {
fprintf(stderr, "fscanf failed on /proc/stat for cpu %d\n", i);
break;
}
else {
t_ticks = (u_ticks + s_ticks + i_ticks + n_ticks)
- (u_ticks_o[i] + s_ticks_o[i]
+ i_ticks_o[i] + n_ticks_o[i]);
if (Irixmode) cpumap=i;
else cpumap=cpu_mapping[i];
printf ("CPU%d states: %2d.%-d%% user, %2d.%-d%% system,"
" %2d.%-d%% nice, %2d.%-d%% idle",
cpumap,
(u_ticks - u_ticks_o[i] + n_ticks - n_ticks_o[i]) * 100 / t_ticks,
(u_ticks - u_ticks_o[i]) * 100 % t_ticks / 100,
(s_ticks - s_ticks_o[i]) * 100 / t_ticks,
(s_ticks - s_ticks_o[i]) * 100 % t_ticks / 100,
(n_ticks - n_ticks_o[i]) * 100 / t_ticks,
(n_ticks - n_ticks_o[i]) * 100 % t_ticks / 100,
(i_ticks - i_ticks_o[i]) * 100 / t_ticks,
(i_ticks - i_ticks_o[i]) * 100 % t_ticks / 100);
s_ticks_o[i] = s_ticks;
u_ticks_o[i] = u_ticks;
n_ticks_o[i] = n_ticks;
i_ticks_o[i] = i_ticks;
PUTP (top_clrtoeol);
putchar ('\n');
}
}
}
fclose(file);
}
}
} else {
/*
* During the first pass, get the information for the
* different CPUs.
*/
if(nr_cpu > 1) {
file = fopen("/proc/stat", "r");
if(file == NULL) {
puts("open");
}
if(fgets(str, 128, file) == NULL) {
fprintf(stderr, "fgets failed on /proc/stat\n");
}
for(i = 0; i < nr_cpu; i++) {
if(fscanf(file, "cpu%*d %d %d %d %d\n",
&u_ticks_o[i], &n_ticks_o[i], &s_ticks_o[i],
&i_ticks_o[i]) != 4) {
fprintf(stderr, "fscanf failed on /proc/stat for cpu %d\n", i);
}
}
fclose(file);
}
}
/*
* Save this frame's information.
*/
for (i = 0; i < n; i++) {
/* copy the relevant info for the next pass */
save_history[i].pid = New_save_hist[i].pid;
save_history[i].ticks = New_save_hist[i].ticks;
save_history[i].stime = New_save_hist[i].stime;
save_history[i].utime = New_save_hist[i].utime;
}
free(New_save_hist);
prev_count = n;
qsort(p, n, sizeof(proc_t*), (void*)mult_lvl_cmp);
}
