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mpstat.c
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mpstat.c
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/*
* mpstat: per-processor statistics
* (C) 2000-2023 by Sebastien GODARD (sysstat <at> orange.fr)
* Copyright (C) 2022 Oracle and/or its affiliates.
*
***************************************************************************
* 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA *
***************************************************************************
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <errno.h>
#include <dirent.h>
#include <ctype.h>
#include <sys/utsname.h>
#include "version.h"
#include "mpstat.h"
#include "count.h"
#include <locale.h> /* For setlocale() */
#ifdef USE_NLS
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
#ifdef USE_SCCSID
#define SCCSID "@(#)sysstat-" VERSION ": " __FILE__ " compiled " __DATE__ " " __TIME__
char *sccsid(void) { return (SCCSID); }
#endif
unsigned long long uptime_cs[3] = {0, 0, 0};
/* NOTE: Use array of _char_ for bitmaps to avoid endianness problems...*/
unsigned char *cpu_bitmap = NULL; /* Bit 0: Global; Bit 1: 1st proc; etc. */
unsigned char *node_bitmap = NULL; /* Bit 0: Global; Bit 1: 1st NUMA node; etc. */
/* Structures used to save CPU and NUMA nodes CPU stats */
struct stats_cpu *st_cpu[3] = {NULL, NULL, NULL};
struct stats_cpu *st_node[3] = {NULL, NULL, NULL};
/*
* Structure used to save total number of interrupts received
* among all CPU and for each CPU.
*/
struct stats_global_irq *st_irq[3] = {NULL, NULL, NULL};
/*
* Structures used to save, for each interrupt, the number
* received by each CPU.
*/
struct stats_irqcpu *st_irqcpu[3] = {NULL, NULL, NULL};
struct stats_irqcpu *st_softirqcpu[3] = {NULL, NULL, NULL};
/*
* Number of CPU per node, e.g.:
* cpu_per_node[0]: total nr of CPU (this is node "all")
* cpu_per_node[1]: nr of CPU for node 0
* etc.
*/
int *cpu_per_node = NULL;
/*
* Node number the CPU belongs to, e.g.:
* cpu2node[0]: node nr for CPU 0
*/
int *cpu2node = NULL;
/* CPU topology */
struct cpu_topology *st_cpu_topology = NULL;
struct tm mp_tstamp[3];
/* Activity flag */
unsigned int actflags = 0;
unsigned int flags = 0;
/* Interval and count parameters */
long interval = -1, count = 0;
/* Number of decimal places */
int dplaces_nr = -1;
/*
* Nb of processors on the machine.
* A value of 2 means there are 2 processors (0 and 1).
*/
int cpu_nr = 0;
/*
* Highest NUMA node number found on the machine.
* A value of 0 means node 0 (one node).
* A value of -1 means no nodes found.
* We have: node_nr < cpu_nr (see get_node_placement() function).
*/
int node_nr = -1;
/* 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 ] [ -H ] [ -n ] [ -T ] [ -u ] [ -V ]\n"
"[ -I { SUM | CPU | SCPU | ALL } ] [ -N { <node_list> | ALL } ]\n"
"[ --dec={ 0 | 1 | 2 } ] [ -o JSON ] [ -P { <cpu_list> | 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. Also do it for NUMA nodes
* (although the machine may not be a NUMA one). Assume that the number of
* nodes is lower or equal than that of CPU.
*
* 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'.
* @pos Indicate which structures should be initialized. When @pos is
* non zero, it means that only the additional, newly allocated
* structures should be initialized.
***************************************************************************
*/
void salloc_mp_struct(int nr_cpus, int pos)
{
int i;
for (i = 0; i < 3; i++) {
SREALLOC(st_cpu[i], struct stats_cpu, STATS_CPU_SIZE * nr_cpus);
SREALLOC(st_node[i], struct stats_cpu, STATS_CPU_SIZE * nr_cpus);
SREALLOC(st_irq[i], struct stats_global_irq, STATS_GLOBAL_IRQ_SIZE * nr_cpus);
SREALLOC(st_irqcpu[i], struct stats_irqcpu,
STATS_IRQCPU_SIZE * nr_cpus * irqcpu_nr);
SREALLOC(st_softirqcpu[i], struct stats_irqcpu,
STATS_IRQCPU_SIZE * nr_cpus * softirqcpu_nr);
}
SREALLOC(cpu_bitmap, unsigned char, (nr_cpus >> 3) + 1);
SREALLOC(node_bitmap, unsigned char, (nr_cpus >> 3) + 1);
SREALLOC(cpu_per_node, int, sizeof(int) * nr_cpus);
SREALLOC(cpu2node, int, sizeof(int) * nr_cpus);
SREALLOC(st_cpu_topology, struct cpu_topology, sizeof(struct cpu_topology) * nr_cpus);
if (pos) {
/* Init already done in SREALLOC macro if @pos == 0 */
for (i = 0; i < 3; i++) {
memset(st_cpu[i] + pos, 0, STATS_CPU_SIZE * (nr_cpus - pos));
memset(st_node[i] + pos, 0, STATS_CPU_SIZE * (nr_cpus - pos));
memset(st_irq[i] + pos, 0, STATS_GLOBAL_IRQ_SIZE * (nr_cpus - pos));
memset(st_irqcpu[i] + pos, 0, STATS_IRQCPU_SIZE * (nr_cpus - pos) * irqcpu_nr);
memset(st_softirqcpu[i] + pos, 0, STATS_IRQCPU_SIZE * (nr_cpus - pos) * softirqcpu_nr);
}
}
else {
memset(cpu_bitmap, 0, (nr_cpus >> 3) + 1);
memset(node_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_node[i]);
free(st_irq[i]);
free(st_irqcpu[i]);
free(st_softirqcpu[i]);
}
free(cpu_bitmap);
free(node_bitmap);
free(cpu_per_node);
free(cpu2node);
}
/*
***************************************************************************
* Set interrupt values for current sample to those of previous sample.
*
* IN:
* @st_ic Array for per-CPU interrupts statistics.
* @c Fist CPU to process.
* @last Last CPU to process.
* @ic_nr Number of interrupts (hard or soft) per CPU.
* @curr Position in array where current statistics will be saved.
**************************************************************************
*/
void fwd_irq_values(struct stats_irqcpu *st_ic[], unsigned int c,
unsigned int last, int ic_nr, int curr)
{
struct stats_global_irq *st_irq_i, *st_irq_j;
struct stats_irqcpu *p, *q;
int j;
while (c < last) {
st_irq_i = st_irq[curr] + c + 1;
st_irq_j = st_irq[!curr] + c + 1;
st_irq_i->irq_nr = st_irq_j->irq_nr;
for (j = 0; j < ic_nr; j++) {
p = st_ic[curr] + c * ic_nr + j;
q = st_ic[!curr] + c * ic_nr + j;
p->interrupt = q->interrupt;
}
c++;
}
}
/*
***************************************************************************
* Get node placement (which node each CPU belongs to, and total number of
* CPU that each node has).
*
* IN:
* @nr_cpus Number of CPU on this machine.
*
* OUT:
* @cpu_per_node Number of CPU per node.
* @cpu2node The node the CPU belongs to.
*
* RETURNS:
* Highest node number found (e.g., 0 means node 0).
* A value of -1 means no nodes have been found.
***************************************************************************
*/
int get_node_placement(int nr_cpus, int cpu_per_node[], int cpu2node[])
{
DIR *dir;
struct dirent *drd;
char line[MAX_PF_NAME];
int cpu, node, hi_node_nr = -1;
/* Init number of CPU per node */
memset(cpu_per_node, 0, sizeof(int) * (nr_cpus + 1));
/* CPU belongs to no node by default */
memset(cpu2node, -1, sizeof(int) * nr_cpus);
/* This is node "all" */
cpu_per_node[0] = nr_cpus;
for (cpu = 0; cpu < nr_cpus; cpu++) {
snprintf(line, sizeof(line), "%s/cpu%d", SYSFS_DEVCPU, cpu);
line[sizeof(line) - 1] = '\0';
/* Open relevant /sys directory */
if ((dir = opendir(line)) == NULL)
return -1;
/* Get current file entry */
while ((drd = readdir(dir)) != NULL) {
if (!strncmp(drd->d_name, "node", 4) && isdigit(drd->d_name[4])) {
node = atoi(drd->d_name + 4);
if ((node >= nr_cpus) || (node < 0)) {
/* Assume we cannot have more nodes than CPU */
closedir(dir);
return -1;
}
cpu_per_node[node + 1]++;
cpu2node[cpu] = node;
if (node > hi_node_nr) {
hi_node_nr = node;
}
/* Node placement found for current CPU: Go to next CPU directory */
break;
}
}
/* Close directory */
closedir(dir);
}
return hi_node_nr;
}
/*
***************************************************************************
* Read system logical topology: Socket number for each logical core is read
* from the /sys/devices/system/cpu/cpu{N}/topology/physical_package_id file,
* and the logical core id number is the first number read from the
* /sys/devices/system/cpu/cpu{N}/topology/thread_siblings_list file.
* Don't use /sys/devices/system/cpu/cpu{N}/topology/core_id as this is the
* physical core id (seems to be different from the number displayed by lscpu).
*
* IN:
* @nr_cpus Number of CPU on this machine.
* @cpu_topo Structures where socket and core id numbers will be saved.
*
* OUT:
* @cpu_topo Structures where socket and core id numbers have been saved.
***************************************************************************
*/
void read_topology(int nr_cpus, struct cpu_topology *cpu_topo)
{
struct cpu_topology *cpu_topo_i;
FILE *fp;
char filename[MAX_PF_NAME];
int cpu, rc;
/* Init system topology */
memset(st_cpu_topology, 0, sizeof(struct cpu_topology) * nr_cpus);
for (cpu = 0; cpu < nr_cpus; cpu++) {
cpu_topo_i = cpu_topo + cpu;
/* Read current CPU's socket number */
snprintf(filename, sizeof(filename), "%s/cpu%d/%s", SYSFS_DEVCPU, cpu, PHYS_PACK_ID);
filename[sizeof(filename) - 1] = '\0';
if ((fp = fopen(filename, "r")) != NULL) {
rc = fscanf(fp, "%d", &cpu_topo_i->phys_package_id);
fclose(fp);
if (rc < 1) {
cpu_topo_i->phys_package_id = -1;
}
}
/* Read current CPU's logical core id number */
snprintf(filename, sizeof(filename), "%s/cpu%d/%s", SYSFS_DEVCPU, cpu, THREAD_SBL_LST);
filename[sizeof(filename) - 1] = '\0';
if ((fp = fopen(filename, "r")) != NULL) {
rc = fscanf(fp, "%d", &cpu_topo_i->logical_core_id);
fclose(fp);
if (rc < 1) {
cpu_topo_i->logical_core_id = -1;
}
}
}
}
/*
***************************************************************************
* Compute node statistics: Split CPU statistics among nodes.
*
* IN:
* @src Structure containing CPU stats to add.
*
* OUT:
* @dest Structure containing global CPU stats.
***************************************************************************
*/
void add_cpu_stats(struct stats_cpu *dest, struct stats_cpu *src)
{
dest->cpu_user += src->cpu_user;
dest->cpu_nice += src->cpu_nice;
dest->cpu_sys += src->cpu_sys;
dest->cpu_idle += src->cpu_idle;
dest->cpu_iowait += src->cpu_iowait;
dest->cpu_hardirq += src->cpu_hardirq;
dest->cpu_softirq += src->cpu_softirq;
dest->cpu_steal += src->cpu_steal;
dest->cpu_guest += src->cpu_guest;
dest->cpu_guest_nice += src->cpu_guest_nice;
}
/*
***************************************************************************
* Compute node statistics: Split CPU statistics among nodes.
*
* IN:
* @prev Index in array where stats used as reference are.
* @curr Index in array for current sample statistics.
*
* OUT:
* @st_node Array where CPU stats for each node have been saved.
***************************************************************************
*/
void set_node_cpu_stats(int prev, int curr)
{
int cpu;
unsigned long long tot_jiffies_p;
struct stats_cpu *scp, *scc, *snp, *snc;
struct stats_cpu *scc_all = st_cpu[curr];
struct stats_cpu *scp_all = st_cpu[prev];
struct stats_cpu *snc_all = st_node[curr];
struct stats_cpu *snp_all = st_node[prev];
/* Reset structures */
memset(st_node[prev], 0, STATS_CPU_SIZE * (cpu_nr + 1));
memset(st_node[curr], 0, STATS_CPU_SIZE * (cpu_nr + 1));
/* Node 'all' is the same as CPU 'all' */
*snp_all = *scp_all;
*snc_all = *scc_all;
/* Individual nodes */
for (cpu = 0; cpu < cpu_nr; cpu++) {
scc = st_cpu[curr] + cpu + 1;
scp = st_cpu[prev] + cpu + 1;
snp = st_node[prev] + cpu2node[cpu] + 1;
snc = st_node[curr] + cpu2node[cpu] + 1;
tot_jiffies_p = scp->cpu_user + scp->cpu_nice +
scp->cpu_sys + scp->cpu_idle +
scp->cpu_iowait + scp->cpu_hardirq +
scp->cpu_steal + scp->cpu_softirq;
if ((tot_jiffies_p == 0) && (interval != 0))
/*
* CPU has just come back online with no ref from
* previous iteration: Skip it.
*/
continue;
add_cpu_stats(snp, scp);
add_cpu_stats(snc, scc);
}
}
/*
***************************************************************************
* Compute global CPU statistics as the sum of individual CPU ones, and
* calculate interval for global CPU.
* Also identify offline CPU.
*
* IN:
* @prev Index in array where stats used as reference are.
* @curr Index in array for current sample statistics.
* @offline_cpu_bitmap
* CPU bitmap for offline CPU.
*
* OUT:
* @offline_cpu_bitmap
* CPU bitmap with offline CPU.
*
* RETURNS:
* Interval for global CPU.
***************************************************************************
*/
unsigned long long get_global_cpu_mpstats(int prev, int curr,
unsigned char offline_cpu_bitmap[])
{
int i;
unsigned long long tot_jiffies_c, tot_jiffies_p;
unsigned long long deltot_jiffies = 0;
struct stats_cpu *scc, *scp;
struct stats_cpu *scc_all = st_cpu[curr];
struct stats_cpu *scp_all = st_cpu[prev];
/*
* For UP machines we keep the values read from global CPU line in /proc/stat.
* Also look for offline CPU: They won't be displayed, and some of their values may
* have to be modified.
*/
if (cpu_nr > 1) {
memset(scc_all, 0, sizeof(struct stats_cpu));
memset(scp_all, 0, sizeof(struct stats_cpu));
}
else {
/* This is a UP machine */
return get_per_cpu_interval(st_cpu[curr], st_cpu[prev]);
}
for (i = 1; i <= cpu_nr; i++) {
scc = st_cpu[curr] + i;
scp = st_cpu[prev] + i;
/*
* Compute the total number of jiffies spent by current processor.
* NB: Don't add cpu_guest/cpu_guest_nice because cpu_user/cpu_nice
* already include them.
*/
tot_jiffies_c = scc->cpu_user + scc->cpu_nice +
scc->cpu_sys + scc->cpu_idle +
scc->cpu_iowait + scc->cpu_hardirq +
scc->cpu_steal + scc->cpu_softirq;
tot_jiffies_p = scp->cpu_user + scp->cpu_nice +
scp->cpu_sys + scp->cpu_idle +
scp->cpu_iowait + scp->cpu_hardirq +
scp->cpu_steal + scp->cpu_softirq;
/*
* If the CPU is offline then it is omitted from /proc/stat:
* All the fields couldn't have been read and the sum of them is zero.
*/
if (tot_jiffies_c == 0) {
/*
* CPU is currently offline.
* 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.
* Note that this workaround no longer fully applies with recent kernels,
* as I have noticed that when a CPU comes back online, some fields
* restart from their previous value (e.g. user, nice, system)
* whereas others restart from zero (idle, iowait)! To deal with this,
* the get_per_cpu_interval() function will set these previous values
* to zero if necessary.
*/
*scc = *scp;
/*
* Mark CPU as offline to not display it
* (and thus it will not be confused with a tickless CPU).
*/
offline_cpu_bitmap[i >> 3] |= 1 << (i & 0x07);
}
if ((tot_jiffies_p == 0) && (interval != 0)) {
/*
* CPU has just come back online.
* Unfortunately, no reference values are available
* from a previous iteration, probably because it was
* already offline when the first sample has been taken.
* So don't display that CPU to prevent "jump-from-zero"
* output syndrome, and don't take it into account for CPU "all".
* NB: Test for interval != 0 to make sure we don't want stats
* since boot time.
*/
offline_cpu_bitmap[i >> 3] |= 1 << (i & 0x07);
continue;
}
/*
* Get interval for current CPU and add it to global CPU.
* Note: Previous idle and iowait values (saved in scp) may be modified here.
*/
deltot_jiffies += get_per_cpu_interval(scc, scp);
add_cpu_stats(scc_all, scc);
add_cpu_stats(scp_all, scp);
}
return deltot_jiffies;
}
/*
***************************************************************************
* Display CPU statistics in plain format.
*
* IN:
* @dis TRUE if a header line must be printed.
* @deltot_jiffies
* Number of jiffies spent on the interval by all processors.
* @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.
* @offline_cpu_bitmap
* CPU bitmap for offline CPU.
***************************************************************************
*/
void write_plain_cpu_stats(int dis, unsigned long long deltot_jiffies, int prev, int curr,
char *prev_string, char *curr_string,
const unsigned char offline_cpu_bitmap[])
{
int i;
struct stats_cpu *scc, *scp;
struct cpu_topology *cpu_topo_i;
if (dis) {
printf("\n%-11s CPU", prev_string);
if (DISPLAY_TOPOLOGY(flags)) {
printf(" CORE SOCK NODE");
}
printf(" %%usr %%nice %%sys %%iowait %%irq "
"%%soft %%steal %%guest %%gnice %%idle\n");
}
/*
* Now display CPU statistics (including CPU "all"),
* except for offline CPU or CPU that the user doesn't want to see.
*/
for (i = 0; i <= cpu_nr; i++) {
/* Check if we want stats about this proc */
if (!(*(cpu_bitmap + (i >> 3)) & (1 << (i & 0x07))) ||
offline_cpu_bitmap[i >> 3] & (1 << (i & 0x07)))
continue;
scc = st_cpu[curr] + i;
scp = st_cpu[prev] + i;
printf("%-11s", curr_string);
if (i == 0) {
/* This is CPU "all" */
cprintf_in(IS_STR, " %s", " all", 0);
if (DISPLAY_TOPOLOGY(flags)) {
printf(" ");
}
}
else {
cprintf_in(IS_INT, " %4d", "", i - 1);
if (DISPLAY_TOPOLOGY(flags)) {
cpu_topo_i = st_cpu_topology + i - 1;
cprintf_in(IS_INT, " %4d", "", cpu_topo_i->logical_core_id);
cprintf_in(IS_INT, " %4d", "", cpu_topo_i->phys_package_id);
cprintf_in(IS_INT, " %4d", "", cpu2node[i - 1]);
}
/* Recalculate itv for current proc */
deltot_jiffies = get_per_cpu_interval(scc, scp);
if (!deltot_jiffies) {
/*
* If the CPU is tickless then there is no change in CPU values
* but the sum of values is not zero.
*/
cprintf_xpc(NO_UNIT, FALSE, 10, 7, 2,
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 100.0);
printf("\n");
continue;
}
}
cprintf_xpc(NO_UNIT, XHIGH, 9, 7, 2,
(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, deltot_jiffies),
(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, deltot_jiffies),
ll_sp_value(scp->cpu_sys,
scc->cpu_sys, deltot_jiffies),
ll_sp_value(scp->cpu_iowait,
scc->cpu_iowait, deltot_jiffies),
ll_sp_value(scp->cpu_hardirq,
scc->cpu_hardirq, deltot_jiffies),
ll_sp_value(scp->cpu_softirq,
scc->cpu_softirq, deltot_jiffies),
ll_sp_value(scp->cpu_steal,
scc->cpu_steal, deltot_jiffies),
ll_sp_value(scp->cpu_guest,
scc->cpu_guest, deltot_jiffies),
ll_sp_value(scp->cpu_guest_nice,
scc->cpu_guest_nice, deltot_jiffies));
cprintf_xpc(NO_UNIT, XLOW, 1, 7, 2,
(scc->cpu_idle < scp->cpu_idle) ?
0.0 :
ll_sp_value(scp->cpu_idle,
scc->cpu_idle, deltot_jiffies));
printf("\n");
}
}
/*
***************************************************************************
* Display CPU statistics in JSON format.
*
* IN:
* @tab Number of tabs to print.
* @deltot_jiffies
* Number of jiffies spent on the interval by all processors.
* @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.
* @offline_cpu_bitmap
* CPU bitmap for offline CPU.
***************************************************************************
*/
void write_json_cpu_stats(int tab, unsigned long long deltot_jiffies, int prev, int curr,
const unsigned char offline_cpu_bitmap[])
{
int i, next = FALSE;
char cpu_name[16], topology[1024] = "";
struct stats_cpu *scc, *scp;
struct cpu_topology *cpu_topo_i;
xprintf(tab++, "\"cpu-load\": [");
/*
* Now display CPU statistics (including CPU "all"),
* except for offline CPU or CPU that the user doesn't want to see.
*/
for (i = 0; i <= cpu_nr; i++) {
/* Check if we want stats about this proc */
if (!(*(cpu_bitmap + (i >> 3)) & (1 << (i & 0x07))) ||
offline_cpu_bitmap[i >> 3] & (1 << (i & 0x07)))
continue;
scc = st_cpu[curr] + i;
scp = st_cpu[prev] + i;
if (next) {
printf(",\n");
}
next = TRUE;
if (i == 0) {
/* This is CPU "all" */
strcpy(cpu_name, K_LOWERALL);
if (DISPLAY_TOPOLOGY(flags)) {
snprintf(topology, sizeof(topology),
", \"core\": \"\", \"socket\": \"\", \"node\": \"\"");
}
}
else {
snprintf(cpu_name, sizeof(cpu_name), "%d", i - 1);
cpu_name[sizeof(cpu_name) - 1] = '\0';
if (DISPLAY_TOPOLOGY(flags)) {
cpu_topo_i = st_cpu_topology + i - 1;
snprintf(topology, sizeof(topology),
", \"core\": \"%d\", \"socket\": \"%d\", \"node\": \"%d\"",
cpu_topo_i->logical_core_id, cpu_topo_i->phys_package_id, cpu2node[i - 1]);
}
/* Recalculate itv for current proc */
deltot_jiffies = get_per_cpu_interval(scc, scp);
if (!deltot_jiffies) {
/*
* If the CPU is tickless then there is no change in CPU values
* but the sum of values is not zero.
*/
xprintf0(tab, "{\"cpu\": \"%d\"%s, \"usr\": 0.00, \"nice\": 0.00, "
"\"sys\": 0.00, \"iowait\": 0.00, \"irq\": 0.00, "
"\"soft\": 0.00, \"steal\": 0.00, \"guest\": 0.00, "
"\"gnice\": 0.00, \"idle\": 100.00}", i - 1, topology);
printf("\n");
continue;
}
}
xprintf0(tab, "{\"cpu\": \"%s\"%s, \"usr\": %.2f, \"nice\": %.2f, \"sys\": %.2f, "
"\"iowait\": %.2f, \"irq\": %.2f, \"soft\": %.2f, \"steal\": %.2f, "
"\"guest\": %.2f, \"gnice\": %.2f, \"idle\": %.2f}",
cpu_name, topology,
(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, deltot_jiffies),
(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, deltot_jiffies),
ll_sp_value(scp->cpu_sys,
scc->cpu_sys, deltot_jiffies),
ll_sp_value(scp->cpu_iowait,
scc->cpu_iowait, deltot_jiffies),
ll_sp_value(scp->cpu_hardirq,
scc->cpu_hardirq, deltot_jiffies),
ll_sp_value(scp->cpu_softirq,
scc->cpu_softirq, deltot_jiffies),
ll_sp_value(scp->cpu_steal,
scc->cpu_steal, deltot_jiffies),
ll_sp_value(scp->cpu_guest,
scc->cpu_guest, deltot_jiffies),
ll_sp_value(scp->cpu_guest_nice,
scc->cpu_guest_nice, deltot_jiffies),
(scc->cpu_idle < scp->cpu_idle) ?
0.0 :
ll_sp_value(scp->cpu_idle,
scc->cpu_idle, deltot_jiffies));
}
printf("\n");
xprintf0(--tab, "]");
}
/*
***************************************************************************
* Display CPU statistics in plain or JSON format.
*
* IN:
* @dis TRUE if a header line must be printed.
* @deltot_jiffies
* Number of jiffies spent on the interval by all processors.
* @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.
* @tab Number of tabs to print (JSON format only).
* @next TRUE is a previous activity has been displayed (JSON format
* only).
* @offline_cpu_bitmap
* CPU bitmap for offline CPU.
***************************************************************************
*/
void write_cpu_stats(int dis, unsigned long long deltot_jiffies, int prev, int curr,
char *prev_string, char *curr_string, int tab, int *next,
unsigned char offline_cpu_bitmap[])
{
if (!deltot_jiffies) {
/* CPU "all" cannot be tickless */
deltot_jiffies = 1;
}
if (DISPLAY_JSON_OUTPUT(flags)) {
if (*next) {
printf(",\n");
}
*next = TRUE;
write_json_cpu_stats(tab, deltot_jiffies, prev, curr,
offline_cpu_bitmap);
}
else {
write_plain_cpu_stats(dis, deltot_jiffies, prev, curr,
prev_string, curr_string, offline_cpu_bitmap);
}
}
/*
***************************************************************************
* Display CPU statistics for NUMA nodes in plain format.
*
* IN:
* @dis TRUE if a header line must be printed.
* @deltot_jiffies
* Number of jiffies spent on the interval by all processors.
* @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_plain_node_stats(int dis, unsigned long long deltot_jiffies,
int prev, int curr, char *prev_string, char *curr_string)
{
struct stats_cpu *snc, *snp, *scc, *scp;
int cpu, node;
if (dis) {
printf("\n%-11s NODE %%usr %%nice %%sys %%iowait %%irq "
"%%soft %%steal %%guest %%gnice %%idle\n",
prev_string);
}
for (node = 0; node <= node_nr + 1; node++) {
snc = st_node[curr] + node;
snp = st_node[prev] + node;
/* Check if we want stats about this node */
if (!(*(node_bitmap + (node >> 3)) & (1 << (node & 0x07))))
continue;
if (!cpu_per_node[node])
/* No CPU in this node */
continue;
printf("%-11s", curr_string);
if (node == 0) {
/* This is node "all", i.e. CPU "all" */
cprintf_in(IS_STR, " %s", " all", 0);
}
else {
cprintf_in(IS_INT, " %4d", "", node - 1);
/* Recalculate interval for current node */
deltot_jiffies = 0;
for (cpu = 1; cpu <= cpu_nr; cpu++) {
scc = st_cpu[curr] + cpu;
scp = st_cpu[prev] + cpu;
if ((scp->cpu_user + scp->cpu_nice + scp->cpu_sys +
scp->cpu_idle + scp->cpu_iowait + scp->cpu_hardirq +
scp->cpu_steal + scp->cpu_softirq == 0) && (interval != 0))
continue;
if (cpu2node[cpu - 1] == node - 1) {
deltot_jiffies += get_per_cpu_interval(scc, scp);
}
}
if (!deltot_jiffies) {
/* All CPU in node are tickless and/or offline */
cprintf_xpc(NO_UNIT, FALSE, 10, 7, 2,
0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 100.0);
printf("\n");
continue;
}
}
cprintf_xpc(NO_UNIT, XHIGH, 9, 7, 2,
(snc->cpu_user - snc->cpu_guest) < (snp->cpu_user - snp->cpu_guest) ?
0.0 :
ll_sp_value(snp->cpu_user - snp->cpu_guest,
snc->cpu_user - snc->cpu_guest, deltot_jiffies),
(snc->cpu_nice - snc->cpu_guest_nice) < (snp->cpu_nice - snp->cpu_guest_nice) ?
0.0 :
ll_sp_value(snp->cpu_nice - snp->cpu_guest_nice,
snc->cpu_nice - snc->cpu_guest_nice, deltot_jiffies),
ll_sp_value(snp->cpu_sys,
snc->cpu_sys, deltot_jiffies),
ll_sp_value(snp->cpu_iowait,
snc->cpu_iowait, deltot_jiffies),
ll_sp_value(snp->cpu_hardirq,
snc->cpu_hardirq, deltot_jiffies),
ll_sp_value(snp->cpu_softirq,
snc->cpu_softirq, deltot_jiffies),
ll_sp_value(snp->cpu_steal,
snc->cpu_steal, deltot_jiffies),
ll_sp_value(snp->cpu_guest,
snc->cpu_guest, deltot_jiffies),
ll_sp_value(snp->cpu_guest_nice,
snc->cpu_guest_nice, deltot_jiffies));
cprintf_xpc(NO_UNIT, XLOW, 1, 7, 2,
(snc->cpu_idle < snp->cpu_idle) ?
0.0 :
ll_sp_value(snp->cpu_idle,
snc->cpu_idle, deltot_jiffies));
printf("\n");
}
}