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mpstat.c
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/*
* mpstat: per-processor statistics
* (C) 2000-2014 by Sebastien GODARD (sysstat <at> orange.fr)
*
***************************************************************************
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU General Public License as published by the *
* Free Software Foundation; either version 2 of the License, or (at your *
* option) any later version. *
* *
* This program is distributed in the hope that it will be useful, but *
* WITHOUT ANY WARRANTY; without the implied warranty of MERCHANTABILITY *
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
* for more details. *
* *
* You should have received a copy of the GNU General Public License along *
* with this program; if not, write to the Free Software Foundation, Inc., *
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
***************************************************************************
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <ctype.h>
#include <sys/utsname.h>
#include "version.h"
#include "mpstat.h"
#include "common.h"
#include "rd_stats.h"
#include "count.h"
#ifdef USE_NLS
#include <locale.h>
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
#define SCCSID "@(#)sysstat-" VERSION ": " __FILE__ " compiled " __DATE__ " " __TIME__
char *sccsid(void) { return (SCCSID); }
unsigned long long uptime[3] = {0, 0, 0};
unsigned long long uptime0[3] = {0, 0, 0};
/* NOTE: Use array of _char_ for bitmaps to avoid endianness problems...*/
unsigned char *cpu_bitmap; /* Bit 0: Global; Bit 1: 1st proc; etc. */
/* Structures used to store stats */
struct stats_cpu *st_cpu[3];
struct stats_irq *st_irq[3];
struct stats_irqcpu *st_irqcpu[3];
struct stats_irqcpu *st_softirqcpu[3];
struct tm mp_tstamp[3];
/* Activity flag */
unsigned int actflags = 0;
unsigned int flags = 0;
/* Interval and count parameters */
long interval = -1, count = 0;
/* Nb of processors on the machine */
int cpu_nr = 0;
/* Nb of interrupts per processor */
int irqcpu_nr = 0;
/* Nb of soft interrupts per processor */
int softirqcpu_nr = 0;
struct sigaction alrm_act, int_act;
int sigint_caught = 0;
/*
***************************************************************************
* Print usage and exit
*
* IN:
* @progname Name of sysstat command
***************************************************************************
*/
void usage(char *progname)
{
fprintf(stderr, _("Usage: %s [ options ] [ <interval> [ <count> ] ]\n"),
progname);
fprintf(stderr, _("Options are:\n"
"[ -A ] [ -u ] [ -V ] [ -I { SUM | CPU | SCPU | ALL } ]\n"
"[ -P { <cpu> [,...] | ON | ALL } ]\n"));
exit(1);
}
/*
***************************************************************************
* SIGALRM signal handler. No need to reset the handler here.
*
* IN:
* @sig Signal number.
***************************************************************************
*/
void alarm_handler(int sig)
{
alarm(interval);
}
/*
***************************************************************************
* SIGINT signal handler.
*
* IN:
* @sig Signal number.
**************************************************************************
*/
void int_handler(int sig)
{
sigint_caught = 1;
}
/*
***************************************************************************
* Allocate stats structures and cpu bitmap.
*
* IN:
* @nr_cpus Number of CPUs. This is the real number of available CPUs + 1
* because we also have to allocate a structure for CPU 'all'.
***************************************************************************
*/
void salloc_mp_struct(int nr_cpus)
{
int i;
for (i = 0; i < 3; i++) {
if ((st_cpu[i] = (struct stats_cpu *) malloc(STATS_CPU_SIZE * nr_cpus))
== NULL) {
perror("malloc");
exit(4);
}
memset(st_cpu[i], 0, STATS_CPU_SIZE * nr_cpus);
if ((st_irq[i] = (struct stats_irq *) malloc(STATS_IRQ_SIZE * nr_cpus))
== NULL) {
perror("malloc");
exit(4);
}
memset(st_irq[i], 0, STATS_IRQ_SIZE * nr_cpus);
if ((st_irqcpu[i] = (struct stats_irqcpu *) malloc(STATS_IRQCPU_SIZE * nr_cpus * irqcpu_nr))
== NULL) {
perror("malloc");
exit(4);
}
memset(st_irqcpu[i], 0, STATS_IRQCPU_SIZE * nr_cpus * irqcpu_nr);
if ((st_softirqcpu[i] = (struct stats_irqcpu *) malloc(STATS_IRQCPU_SIZE * nr_cpus * softirqcpu_nr))
== NULL) {
perror("malloc");
exit(4);
}
memset(st_softirqcpu[i], 0, STATS_IRQCPU_SIZE * nr_cpus * softirqcpu_nr);
}
if ((cpu_bitmap = (unsigned char *) malloc((nr_cpus >> 3) + 1)) == NULL) {
perror("malloc");
exit(4);
}
memset(cpu_bitmap, 0, (nr_cpus >> 3) + 1);
}
/*
***************************************************************************
* Free structures and bitmap.
***************************************************************************
*/
void sfree_mp_struct(void)
{
int i;
for (i = 0; i < 3; i++) {
free(st_cpu[i]);
free(st_irq[i]);
free(st_irqcpu[i]);
free(st_softirqcpu[i]);
}
free(cpu_bitmap);
}
/*
***************************************************************************
* Display per CPU statistics.
*
* IN:
* @st_ic Array for per-CPU statistics.
* @ic_nr Number of interrupts (hard or soft) per CPU.
* @dis TRUE if a header line must be printed.
* @itv Interval value.
* @prev Position in array where statistics used as reference are.
* Stats used as reference may be the previous ones read, or
* the very first ones when calculating the average.
* @curr Position in array where current statistics will be saved.
* @prev_string String displayed at the beginning of a header line. This is
* the timestamp of the previous sample, or "Average" when
* displaying average stats.
* @curr_string String displayed at the beginning of current sample stats.
* This is the timestamp of the current sample, or "Average"
* when displaying average stats.
***************************************************************************
*/
void write_irqcpu_stats(struct stats_irqcpu *st_ic[], int ic_nr, int dis,
unsigned long long itv, int prev, int curr,
char *prev_string, char *curr_string)
{
struct stats_cpu *scc;
int j = 0, offset, cpu;
struct stats_irqcpu *p, *q, *p0, *q0;
/*
* Check if number of interrupts has changed.
* NB: A null interval value indicates that we are
* displaying statistics since system startup.
*/
if (!dis && interval) {
do {
p0 = st_ic[curr] + j;
if (p0->irq_name[0] != '\0') {
q0 = st_ic[prev] + j;
if (strcmp(p0->irq_name, q0->irq_name)) {
/* These are two different irq */
j = -2;
}
}
j++;
}
while ((j > 0) && (j <= ic_nr));
}
if (dis || (j < 0)) {
/* Print header */
printf("\n%-11s CPU", prev_string);
for (j = 0; j < ic_nr; j++) {
p0 = st_ic[curr] + j;
if (p0->irq_name[0] != '\0') { /* Nb of irq per proc may have varied... */
printf(" %8s/s", p0->irq_name);
}
}
printf("\n");
}
for (cpu = 1; cpu <= cpu_nr; cpu++) {
scc = st_cpu[curr] + cpu;
/*
* Check if we want stats about this CPU.
* CPU must have been explicitly selected using option -P,
* else we display every CPU.
*/
if (!(*(cpu_bitmap + (cpu >> 3)) & (1 << (cpu & 0x07))) && USE_P_OPTION(flags))
continue;
if ((scc->cpu_user + scc->cpu_nice + scc->cpu_sys +
scc->cpu_iowait + scc->cpu_idle + scc->cpu_steal +
scc->cpu_hardirq + scc->cpu_softirq) == 0) {
/* Offline CPU found */
if (DISPLAY_ONLINE_CPU(flags))
continue;
}
printf("%-11s %3d", curr_string, cpu - 1);
for (j = 0; j < ic_nr; j++) {
p0 = st_ic[curr] + j; /* irq field set only for proc #0 */
/*
* An empty string for irq name means it is a remaining interrupt
* which is no longer used, for example because the
* number of interrupts has decreased in /proc/interrupts.
*/
if (p0->irq_name[0] != '\0') {
q0 = st_ic[prev] + j;
offset = j;
/*
* If we want stats for the time since system startup,
* we have p0->irq != q0->irq, since q0 structure is
* completely set to zero.
*/
if (strcmp(p0->irq_name, q0->irq_name) && interval) {
if (j)
offset = j - 1;
q0 = st_ic[prev] + offset;
if (strcmp(p0->irq_name, q0->irq_name) && (j + 1 < ic_nr))
offset = j + 1;
q0 = st_ic[prev] + offset;
}
if (!strcmp(p0->irq_name, q0->irq_name) || !interval) {
p = st_ic[curr] + (cpu - 1) * ic_nr + j;
q = st_ic[prev] + (cpu - 1) * ic_nr + offset;
printf(" %10.2f",
S_VALUE(q->interrupt, p->interrupt, itv));
}
else
printf(" N/A");
}
}
printf("\n");
}
}
/*
***************************************************************************
* Core function used to display statistics.
*
* IN:
* @prev Position in array where statistics used as reference are.
* Stats used as reference may be the previous ones read, or
* the very first ones when calculating the average.
* @curr Position in array where statistics for current sample are.
* @dis TRUE if a header line must be printed.
* @prev_string String displayed at the beginning of a header line. This is
* the timestamp of the previous sample, or "Average" when
* displaying average stats.
* @curr_string String displayed at the beginning of current sample stats.
* This is the timestamp of the current sample, or "Average"
* when displaying average stats.
***************************************************************************
*/
void write_stats_core(int prev, int curr, int dis,
char *prev_string, char *curr_string)
{
struct stats_cpu *scc, *scp;
unsigned long long itv, pc_itv, g_itv;
int cpu;
/* Test stdout */
TEST_STDOUT(STDOUT_FILENO);
/* Compute time interval */
g_itv = get_interval(uptime[prev], uptime[curr]);
/* Reduce interval value to one processor */
if (cpu_nr > 1) {
itv = get_interval(uptime0[prev], uptime0[curr]);
}
else {
itv = g_itv;
}
/* Print CPU stats */
if (DISPLAY_CPU(actflags)) {
if (dis) {
printf("\n%-11s CPU %%usr %%nice %%sys %%iowait %%irq "
"%%soft %%steal %%guest %%gnice %%idle\n",
prev_string);
}
/* Check if we want global stats among all proc */
if (*cpu_bitmap & 1) {
printf("%-11s all", curr_string);
printf(" %6.2f %6.2f %6.2f %6.2f %6.2f %6.2f %6.2f %6.2f %6.2f %6.2f\n",
(st_cpu[curr]->cpu_user - st_cpu[curr]->cpu_guest) <
(st_cpu[prev]->cpu_user - st_cpu[prev]->cpu_guest) ?
0.0 :
ll_sp_value(st_cpu[prev]->cpu_user - st_cpu[prev]->cpu_guest,
st_cpu[curr]->cpu_user - st_cpu[curr]->cpu_guest,
g_itv),
(st_cpu[curr]->cpu_nice - st_cpu[curr]->cpu_guest_nice) <
(st_cpu[prev]->cpu_nice - st_cpu[prev]->cpu_guest_nice) ?
0.0 :
ll_sp_value(st_cpu[prev]->cpu_nice - st_cpu[prev]->cpu_guest_nice,
st_cpu[curr]->cpu_nice - st_cpu[curr]->cpu_guest_nice,
g_itv),
ll_sp_value(st_cpu[prev]->cpu_sys,
st_cpu[curr]->cpu_sys,
g_itv),
ll_sp_value(st_cpu[prev]->cpu_iowait,
st_cpu[curr]->cpu_iowait,
g_itv),
ll_sp_value(st_cpu[prev]->cpu_hardirq,
st_cpu[curr]->cpu_hardirq,
g_itv),
ll_sp_value(st_cpu[prev]->cpu_softirq,
st_cpu[curr]->cpu_softirq,
g_itv),
ll_sp_value(st_cpu[prev]->cpu_steal,
st_cpu[curr]->cpu_steal,
g_itv),
ll_sp_value(st_cpu[prev]->cpu_guest,
st_cpu[curr]->cpu_guest,
g_itv),
ll_sp_value(st_cpu[prev]->cpu_guest_nice,
st_cpu[curr]->cpu_guest_nice,
g_itv),
(st_cpu[curr]->cpu_idle < st_cpu[prev]->cpu_idle) ?
0.0 :
ll_sp_value(st_cpu[prev]->cpu_idle,
st_cpu[curr]->cpu_idle,
g_itv));
}
for (cpu = 1; cpu <= cpu_nr; cpu++) {
scc = st_cpu[curr] + cpu;
scp = st_cpu[prev] + cpu;
/* Check if we want stats about this proc */
if (!(*(cpu_bitmap + (cpu >> 3)) & (1 << (cpu & 0x07))))
continue;
/*
* If the CPU is offline then it is omited from /proc/stat
* and the sum of all values is zero.
* (Remember that guest/guest_nice times are already included in
* user/nice modes.)
*/
if ((scc->cpu_user + scc->cpu_nice + scc->cpu_sys +
scc->cpu_iowait + scc->cpu_idle + scc->cpu_steal +
scc->cpu_hardirq + scc->cpu_softirq) == 0) {
if (!DISPLAY_ONLINE_CPU(flags)) {
printf("%-11s %4d"
" %6.2f %6.2f %6.2f %6.2f %6.2f %6.2f"
" %6.2f %6.2f %6.2f %6.2f\n",
curr_string, cpu - 1,
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0);
}
continue;
}
printf("%-11s %4d", curr_string, cpu - 1);
/* Recalculate itv for current proc */
pc_itv = get_per_cpu_interval(scc, scp);
if (!pc_itv) {
/*
* If the CPU is tickless then there is no change in CPU values
* but the sum of values is not zero.
*/
printf(" %6.2f %6.2f %6.2f %6.2f %6.2f %6.2f"
" %6.2f %6.2f %6.2f %6.2f\n",
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 100.0);
}
else {
printf(" %6.2f %6.2f %6.2f %6.2f %6.2f %6.2f"
" %6.2f %6.2f %6.2f %6.2f\n",
(scc->cpu_user - scc->cpu_guest) < (scp->cpu_user - scp->cpu_guest) ?
0.0 :
ll_sp_value(scp->cpu_user - scp->cpu_guest,
scc->cpu_user - scc->cpu_guest,
pc_itv),
(scc->cpu_nice - scc->cpu_guest_nice) < (scp->cpu_nice - scp->cpu_guest_nice) ?
0.0 :
ll_sp_value(scp->cpu_nice - scp->cpu_guest_nice,
scc->cpu_nice - scc->cpu_guest_nice,
pc_itv),
ll_sp_value(scp->cpu_sys,
scc->cpu_sys,
pc_itv),
ll_sp_value(scp->cpu_iowait,
scc->cpu_iowait,
pc_itv),
ll_sp_value(scp->cpu_hardirq,
scc->cpu_hardirq,
pc_itv),
ll_sp_value(scp->cpu_softirq,
scc->cpu_softirq,
pc_itv),
ll_sp_value(scp->cpu_steal,
scc->cpu_steal,
pc_itv),
ll_sp_value(scp->cpu_guest,
scc->cpu_guest,
pc_itv),
ll_sp_value(scp->cpu_guest_nice,
scc->cpu_guest_nice,
pc_itv),
(scc->cpu_idle < scp->cpu_idle) ?
0.0 :
ll_sp_value(scp->cpu_idle,
scc->cpu_idle,
pc_itv));
}
}
}
/* Print total number of interrupts per processor */
if (DISPLAY_IRQ_SUM(actflags)) {
struct stats_irq *sic, *sip;
if (dis) {
printf("\n%-11s CPU intr/s\n", prev_string);
}
if (*cpu_bitmap & 1) {
printf("%-11s all %9.2f\n", curr_string,
ll_s_value(st_irq[prev]->irq_nr, st_irq[curr]->irq_nr, itv));
}
for (cpu = 1; cpu <= cpu_nr; cpu++) {
sic = st_irq[curr] + cpu;
sip = st_irq[prev] + cpu;
scc = st_cpu[curr] + cpu;
scp = st_cpu[prev] + cpu;
/* Check if we want stats about this proc */
if (!(*(cpu_bitmap + (cpu >> 3)) & (1 << (cpu & 0x07))))
continue;
if ((scc->cpu_user + scc->cpu_nice + scc->cpu_sys +
scc->cpu_iowait + scc->cpu_idle + scc->cpu_steal +
scc->cpu_hardirq + scc->cpu_softirq) == 0) {
/* This is an offline CPU */
if (!DISPLAY_ONLINE_CPU(flags)) {
printf("%-11s %4d"
" %9.2f\n",
curr_string, cpu - 1,
0.0);
}
continue;
}
printf("%-11s %4d", curr_string, cpu - 1);
/* Recalculate itv for current proc */
pc_itv = get_per_cpu_interval(scc, scp);
if (!pc_itv) {
/* This is a tickless CPU */
printf(" %9.2f\n", 0.0);
}
else {
printf(" %9.2f\n",
ll_s_value(sip->irq_nr, sic->irq_nr, itv));
}
}
}
if (DISPLAY_IRQ_CPU(actflags)) {
write_irqcpu_stats(st_irqcpu, irqcpu_nr, dis, itv, prev, curr,
prev_string, curr_string);
}
if (DISPLAY_SOFTIRQS(actflags)) {
write_irqcpu_stats(st_softirqcpu, softirqcpu_nr, dis, itv, prev, curr,
prev_string, curr_string);
}
/* Fix CPU counter values for every offline CPU */
for (cpu = 1; cpu <= cpu_nr; cpu++) {
scc = st_cpu[curr] + cpu;
scp = st_cpu[prev] + cpu;
if ((scc->cpu_user + scc->cpu_nice + scc->cpu_sys +
scc->cpu_iowait + scc->cpu_idle + scc->cpu_steal +
scc->cpu_hardirq + scc->cpu_softirq) == 0) {
/*
* Offline CPU found.
* Set current struct fields (which have been set to zero)
* to values from previous iteration. Hence their values won't
* jump from zero when the CPU comes back online.
*/
*scc = *scp;
}
}
}
/*
***************************************************************************
* Print statistics average.
*
* IN:
* @curr Position in array where statistics for current sample are.
* @dis TRUE if a header line must be printed.
***************************************************************************
*/
void write_stats_avg(int curr, int dis)
{
char string[16];
strncpy(string, _("Average:"), 16);
string[15] = '\0';
write_stats_core(2, curr, dis, string, string);
}
/*
***************************************************************************
* Print statistics.
*
* IN:
* @curr Position in array where statistics for current sample are.
* @dis TRUE if a header line must be printed.
***************************************************************************
*/
void write_stats(int curr, int dis)
{
char cur_time[2][16];
/* Get previous timestamp */
strftime(cur_time[!curr], sizeof(cur_time[!curr]), "%X", &(mp_tstamp[!curr]));
/* Get current timestamp */
strftime(cur_time[curr], sizeof(cur_time[curr]), "%X", &(mp_tstamp[curr]));
write_stats_core(!curr, curr, dis, cur_time[!curr], cur_time[curr]);
}
/*
***************************************************************************
* Read stats from /proc/interrupts or /proc/softirqs.
*
* IN:
* @file /proc file to read (interrupts or softirqs).
* @ic_nr Number of interrupts (hard or soft) per CPU.
* @curr Position in array where current statistics will be saved.
*
* OUT:
* @st_ic Array for per-CPU statistics.
***************************************************************************
*/
void read_interrupts_stat(char *file, struct stats_irqcpu *st_ic[], int ic_nr, int curr)
{
FILE *fp;
struct stats_irq *st_irq_i;
struct stats_irqcpu *p;
char *line = NULL, *li;
unsigned long irq = 0;
unsigned int cpu;
int cpu_index[cpu_nr], index = 0, len;
char *cp, *next;
for (cpu = 0; cpu < cpu_nr; cpu++) {
st_irq_i = st_irq[curr] + cpu + 1;
st_irq_i->irq_nr = 0;
}
if ((fp = fopen(file, "r")) != NULL) {
SREALLOC(line, char, INTERRUPTS_LINE + 11 * cpu_nr);
/*
* Parse header line to see which CPUs are online
*/
while (fgets(line, INTERRUPTS_LINE + 11 * cpu_nr, fp) != NULL) {
next = line;
while (((cp = strstr(next, "CPU")) != NULL) && (index < cpu_nr)) {
cpu = strtol(cp + 3, &next, 10);
cpu_index[index++] = cpu;
}
if (index)
/* Header line found */
break;
}
while ((fgets(line, INTERRUPTS_LINE + 11 * cpu_nr, fp) != NULL) &&
(irq < ic_nr)) {
/* Skip over "<irq>:" */
if ((cp = strchr(line, ':')) == NULL)
/* Chr ':' not found */
continue;
cp++;
p = st_ic[curr] + irq;
li = line;
while (*li == ' ')
li++;
len = strcspn(li, ":");
if (len >= MAX_IRQ_LEN) {
len = MAX_IRQ_LEN - 1;
}
strncpy(p->irq_name, li, len);
p->irq_name[len] = '\0';
for (cpu = 0; cpu < index; cpu++) {
p = st_ic[curr] + cpu_index[cpu] * ic_nr + irq;
st_irq_i = st_irq[curr] + cpu_index[cpu] + 1;
/*
* No need to set (st_irqcpu + cpu * irqcpu_nr)->irq:
* This is the same as st_irqcpu->irq.
*/
p->interrupt = strtoul(cp, &next, 10);
st_irq_i->irq_nr += p->interrupt;
cp = next;
}
irq++;
}
fclose(fp);
free(line);
}
while (irq < ic_nr) {
/* Nb of interrupts per processor has changed */
p = st_ic[curr] + irq;
p->irq_name[0] = '\0'; /* This value means this is a dummy interrupt */
irq++;
}
}
/*
***************************************************************************
* Main loop: Read stats from the relevant sources, and display them.
*
* IN:
* @dis_hdr Set to TRUE if the header line must always be printed.
* @rows Number of rows of screen.
***************************************************************************
*/
void rw_mpstat_loop(int dis_hdr, int rows)
{
struct stats_cpu *scc;
int cpu;
int curr = 1, dis = 1;
unsigned long lines = rows;
/* Dont buffer data if redirected to a pipe */
setbuf(stdout, NULL);
/* Read stats */
if (cpu_nr > 1) {
/*
* Init uptime0. So if /proc/uptime cannot fill it,
* this will be done by /proc/stat.
*/
uptime0[0] = 0;
read_uptime(&(uptime0[0]));
}
read_stat_cpu(st_cpu[0], cpu_nr + 1, &(uptime[0]), &(uptime0[0]));
if (DISPLAY_IRQ_SUM(actflags)) {
read_stat_irq(st_irq[0], 1);
}
if (DISPLAY_IRQ_SUM(actflags) || DISPLAY_IRQ_CPU(actflags)) {
/* Read this file to display int per CPU or total nr of int per CPU */
read_interrupts_stat(INTERRUPTS, st_irqcpu, irqcpu_nr, 0);
}
if (DISPLAY_SOFTIRQS(actflags)) {
read_interrupts_stat(SOFTIRQS, st_softirqcpu, softirqcpu_nr, 0);
}
if (!interval) {
/* Display since boot time */
mp_tstamp[1] = mp_tstamp[0];
memset(st_cpu[1], 0, STATS_CPU_SIZE * (cpu_nr + 1));
memset(st_irq[1], 0, STATS_IRQ_SIZE * (cpu_nr + 1));
memset(st_irqcpu[1], 0, STATS_IRQCPU_SIZE * (cpu_nr + 1) * irqcpu_nr);
if (DISPLAY_SOFTIRQS(actflags)) {
memset(st_softirqcpu[1], 0, STATS_IRQCPU_SIZE * (cpu_nr + 1) * softirqcpu_nr);
}
write_stats(0, DISP_HDR);
exit(0);
}
/* Set a handler for SIGALRM */
memset(&alrm_act, 0, sizeof(alrm_act));
alrm_act.sa_handler = (void *) alarm_handler;
sigaction(SIGALRM, &alrm_act, NULL);
alarm(interval);
/* Save the first stats collected. Will be used to compute the average */
mp_tstamp[2] = mp_tstamp[0];
uptime[2] = uptime[0];
uptime0[2] = uptime0[0];
memcpy(st_cpu[2], st_cpu[0], STATS_CPU_SIZE * (cpu_nr + 1));
memcpy(st_irq[2], st_irq[0], STATS_IRQ_SIZE * (cpu_nr + 1));
memcpy(st_irqcpu[2], st_irqcpu[0], STATS_IRQCPU_SIZE * (cpu_nr + 1) * irqcpu_nr);
if (DISPLAY_SOFTIRQS(actflags)) {
memcpy(st_softirqcpu[2], st_softirqcpu[0],
STATS_IRQCPU_SIZE * (cpu_nr + 1) * softirqcpu_nr);
}
/* Set a handler for SIGINT */
memset(&int_act, 0, sizeof(int_act));
int_act.sa_handler = (void *) int_handler;
sigaction(SIGINT, &int_act, NULL);
pause();
if (sigint_caught)
/* SIGINT signal caught during first interval: Exit immediately */
return;
do {
/*
* Resetting the structure not needed since every fields will be set.
* Exceptions are per-CPU structures: Some of them may not be filled
* if corresponding processor is disabled (offline). We set them to zero
* to be able to distinguish between offline and tickless CPUs.
*/
for (cpu = 1; cpu <= cpu_nr; cpu++) {
scc = st_cpu[curr] + cpu;
memset(scc, 0, STATS_CPU_SIZE);
}
/* Get time */
get_localtime(&(mp_tstamp[curr]), 0);
/* Read stats */
if (cpu_nr > 1) {
uptime0[curr] = 0;
read_uptime(&(uptime0[curr]));
}
read_stat_cpu(st_cpu[curr], cpu_nr + 1, &(uptime[curr]), &(uptime0[curr]));
if (DISPLAY_IRQ_SUM(actflags)) {
read_stat_irq(st_irq[curr], 1);
}
if (DISPLAY_IRQ_SUM(actflags) || DISPLAY_IRQ_CPU(actflags)) {
read_interrupts_stat(INTERRUPTS, st_irqcpu, irqcpu_nr, curr);
}
if (DISPLAY_SOFTIRQS(actflags)) {
read_interrupts_stat(SOFTIRQS, st_softirqcpu, softirqcpu_nr, curr);
}
/* Write stats */
if (!dis_hdr) {
dis = lines / rows;
if (dis) {
lines %= rows;
}
lines++;
}
write_stats(curr, dis);
if (count > 0) {
count--;
}
if (count) {
pause();
if (sigint_caught) {
/* SIGINT signal caught => Display average stats */
count = 0;
printf("\n"); /* Skip "^C" displayed on screen */
}
else {
curr ^= 1;
}
}
}
while (count);
/* Write stats average */
write_stats_avg(curr, dis_hdr);
}
/*
***************************************************************************
* Main entry to the program
***************************************************************************
*/
int main(int argc, char **argv)
{
int opt = 0, i, actset = FALSE;
struct utsname header;
int dis_hdr = -1;
int rows = 23;
char *t;
#ifdef USE_NLS
/* Init National Language Support */
init_nls();
#endif
/* Get HZ */
get_HZ();
/* What is the highest processor number on this machine? */
cpu_nr = get_cpu_nr(~0, TRUE);
/* Calculate number of interrupts per processor */
irqcpu_nr = get_irqcpu_nr(INTERRUPTS, NR_IRQS, cpu_nr) +
NR_IRQCPU_PREALLOC;
/* Calculate number of soft interrupts per processor */
softirqcpu_nr = get_irqcpu_nr(SOFTIRQS, NR_IRQS, cpu_nr) +
NR_IRQCPU_PREALLOC;
/*
* cpu_nr: a value of 2 means there are 2 processors (0 and 1).
* In this case, we have to allocate 3 structures: global, proc0 and proc1.
*/
salloc_mp_struct(cpu_nr + 1);
while (++opt < argc) {
if (!strcmp(argv[opt], "-I")) {
if (argv[++opt]) {
actset = TRUE;
if (!strcmp(argv[opt], K_SUM)) {
/* Display total number of interrupts per CPU */
actflags |= M_D_IRQ_SUM;
}
else if (!strcmp(argv[opt], K_CPU)) {
/* Display interrupts per CPU */
actflags |= M_D_IRQ_CPU;
}
else if (!strcmp(argv[opt], K_SCPU)) {
/* Display soft interrupts per CPU */
actflags |= M_D_SOFTIRQS;
}
else if (!strcmp(argv[opt], K_ALL)) {
actflags |= M_D_IRQ_SUM + M_D_IRQ_CPU + M_D_SOFTIRQS;
}
else {
usage(argv[0]);
}
}
else {
usage(argv[0]);
}
}
else if (!strcmp(argv[opt], "-P")) {
/* '-P ALL' can be used on UP machines */
if (argv[++opt]) {
flags |= F_P_OPTION;
dis_hdr++;
for (t = strtok(argv[opt], ","); t; t = strtok(NULL, ",")) {
if (!strcmp(t, K_ALL) || !strcmp(t, K_ON)) {
if (cpu_nr) {
dis_hdr = 9;
}
/*
* Set bit for every processor.
* Also indicate to display stats for CPU 'all'.
*/
memset(cpu_bitmap, 0xff, ((cpu_nr + 1) >> 3) + 1);
if (!strcmp(t, K_ON)) {
/* Display stats only for online CPU */
flags |= F_P_ON;
}
}
else {
if (strspn(t, DIGITS) != strlen(t)) {
usage(argv[0]);
}
i = atoi(t); /* Get cpu number */
if (i >= cpu_nr) {
fprintf(stderr, _("Not that many processors!\n"));
exit(1);
}
i++;
*(cpu_bitmap + (i >> 3)) |= 1 << (i & 0x07);
}
}
}
else {
usage(argv[0]);
}
}
else if (!strncmp(argv[opt], "-", 1)) {
for (i = 1; *(argv[opt] + i); i++) {
switch (*(argv[opt] + i)) {
case 'A':
actflags |= M_D_CPU + M_D_IRQ_SUM + M_D_IRQ_CPU + M_D_SOFTIRQS;
actset = TRUE;
/* Select all processors */
flags |= F_P_OPTION;
memset(cpu_bitmap, 0xff, ((cpu_nr + 1) >> 3) + 1);
break;
case 'u':
/* Display CPU */
actflags |= M_D_CPU;
break;
case 'V':
/* Print version number */
print_version();