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iostat.c
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/*
* iostat: report CPU and I/O statistics
* (C) 1998-2023 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., *
* 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 <fcntl.h>
#include <errno.h>
#include <time.h>
#include <ctype.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/utsname.h>
#include <libgen.h>
#include "version.h"
#include "iostat.h"
#include "ioconf.h"
#include "rd_stats.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
#ifdef TEST
extern int __env;
#endif
struct stats_cpu *st_cpu[2];
unsigned long long uptime_cs[2] = {0, 0};
unsigned long long tot_jiffies[2] = {0, 0};
struct io_device *dev_list = NULL;
/* Number of decimal places */
int dplaces_nr = -1;
int group_nr = 0; /* Nb of device groups */
int cpu_nr = 0; /* Nb of processors on the machine */
int flags = 0; /* Flag for common options and system state */
long interval = 0;
char timestamp[TIMESTAMP_LEN];
char alt_dir[MAX_FILE_LEN];
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);
#ifdef DEBUG
fprintf(stderr, _("Options are:\n"
"[ -c ] [ -d ] [ -h ] [ -k | -m ] [ -N ] [ -s ] [ -t ] [ -V ] [ -x ] [ -y ] [ -z ]\n"
"[ { -f | +f } <directory> ] [ -j { ID | LABEL | PATH | UUID | ... } ]\n"
"[ --compact ] [ --dec={ 0 | 1 | 2 } ] [ --human ] [ --pretty ] [ -o JSON ]\n"
"[ [ -H ] -g <group_name> ] [ -p [ <device> [,...] | ALL ] ]\n"
"[ <device> [...] | ALL ] [ --debuginfo ]\n"));
#else
fprintf(stderr, _("Options are:\n"
"[ -c ] [ -d ] [ -h ] [ -k | -m ] [ -N ] [ -s ] [ -t ] [ -V ] [ -x ] [ -y ] [ -z ]\n"
"[ { -f | +f } <directory> ] [ -j { ID | LABEL | PATH | UUID | ... } ]\n"
"[ --compact ] [ --dec={ 0 | 1 | 2 } ] [ --human ] [ --pretty ] [ -o JSON ]\n"
"[ [ -H ] -g <group_name> ] [ -p [ <device> [,...] | ALL ] ]\n"
"[ <device> [...] | ALL ]\n"));
#endif
exit(1);
}
/*
***************************************************************************
* Set disk output unit. Unit will be kB/s unless POSIXLY_CORRECT
* environment variable has been set, in which case the output will be
* expressed in blocks/s.
***************************************************************************
*/
void set_disk_output_unit(void)
{
if (DISPLAY_KILOBYTES(flags) || DISPLAY_MEGABYTES(flags))
return;
/* Check POSIXLY_CORRECT environment variable */
if (__getenv(ENV_POSIXLY_CORRECT) == NULL) {
/* Variable not set: Unit is kB/s and not blocks/s */
flags |= I_D_KILOBYTES;
}
}
/*
***************************************************************************
* Get device mapper name (e.g. "dm-0") from its registered name (e.g.
* "virtualhd-home").
*
* IN:
* @name Registered name of the device (e.g. "virtualhd-home").
*
* RETURNS:
* Name of the device mapper name (e.g. "dm-0").
***************************************************************************
*/
char *get_dm_name_from_registered_name(char *registered_name)
{
int n;
char filen[PATH_MAX];
char target[PATH_MAX];
/*
* The registered device name is a symlink pointing at its device mapper name
* in the /dev/mapper directory.
*/
n = snprintf(filen, sizeof(filen), "%s/%s", DEVMAP_DIR, registered_name);
if ((n >= sizeof(filen)) || access(filen, F_OK)) {
return (NULL);
}
/* Read symlink */
n = readlink(filen, target, PATH_MAX);
if ((n <= 0) || (n >= PATH_MAX))
return (NULL);
target[n] = '\0';
/* ... and get device mapper name it points at */
return basename(target);
}
/*
***************************************************************************
* 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;
}
/*
***************************************************************************
* Initialize stats common structures.
***************************************************************************
*/
void init_stats(void)
{
int i;
/* Allocate structures for CPUs "all" and 0 */
for (i = 0; i < 2; i++) {
if ((st_cpu[i] = (struct stats_cpu *) malloc(STATS_CPU_SIZE * 2)) == NULL) {
perror("malloc");
exit(4);
}
memset(st_cpu[i], 0, STATS_CPU_SIZE * 2);
}
}
/*
***************************************************************************
* Set every device entry to nonexistent status.
*
* IN:
* @dlist Pointer on the start of the linked list.
***************************************************************************
*/
void set_devices_nonexistent(struct io_device *dlist)
{
while (dlist != NULL) {
dlist->exist = FALSE;
dlist = dlist->next;
}
}
/*
***************************************************************************
* Get device major and minor numbers.
*
* IN:
* @filename Name of the device ("sda", "/dev/sdb1"...)
*
* OUT:
* @major Major number of the device.
* @minor Minor number of the device.
*
* RETURNS:
* 0 on success, and -1 otherwise.
***************************************************************************
*/
int get_major_minor_nr(char filename[], int *major, int *minor)
{
struct stat statbuf;
char *bang;
char dfile[MAX_PF_NAME];
snprintf(dfile, sizeof(dfile), "%s%s", filename[0] == '/' ? "" : SLASH_DEV, filename);
dfile[sizeof(dfile) - 1] = '\0';
while ((bang = strchr(dfile, '!'))) {
/*
* Some devices may have had a slash replaced with a bang character (eg. cciss!c0d0...)
* Restore their original names so that they can be found in /dev directory.
*/
*bang = '/';
}
if (__stat(dfile, &statbuf) < 0)
return -1;
*major = __major(statbuf.st_rdev);
*minor = __minor(statbuf.st_rdev);
return 0;
}
/*
***************************************************************************
* Check if a device is present in the list, and add it if requested.
* Also look for its type (device or partition) and save it.
*
* IN:
* @dlist Address of pointer on the start of the linked list.
* @name Device name.
* @dtype T_PART_DEV (=2) if the device and all its partitions should
* also be read (option -p used), T_GROUP (=3) if it's a group
* name, and 0 otherwise.
* @major Major number of the device (set to UKWN_MAJ_NR by caller if
* unknown: In this case, major and minor numbers will be
* determined here).
* @minor Minor number of the device.
*
* RETURNS:
* Pointer on the io_device structure in the list where the device is located
* (whether it was already in the list or if it has been added).
* NULL if the device name is too long or if the device doesn't exist and we
* don't want to add it.
***************************************************************************
*/
struct io_device *add_list_device(struct io_device **dlist, char *name, int dtype,
int major, int minor)
{
struct io_device *d, *ds;
int i, maj_nr, min_nr;
if (strnlen(name, MAX_NAME_LEN) == MAX_NAME_LEN)
/* Device name is too long */
return NULL;
while (*dlist != NULL) {
d = *dlist;
if ((i = strcmp(d->name, name)) == 0) {
/* Device found in list */
if ((dtype == T_PART_DEV) && (d->dev_tp == T_DEV)) {
d->dev_tp = dtype;
}
d->exist = TRUE;
return d;
}
if (!GROUP_DEFINED(flags) && !DISPLAY_EVERYTHING(flags) && (i > 0))
/*
* If no group defined and we don't use /proc/diskstats,
* insert current device in alphabetical order.
* NB: Using /proc/diskstats ("iostat -p ALL") is a bit better than
* using alphabetical order because sda10 comes after sda9...
*/
break;
dlist = &(d->next);
}
/* Device not found */
ds = *dlist;
/* Add device to the list */
if ((*dlist = (struct io_device *) malloc(sizeof(struct io_device))) == NULL) {
perror("malloc");
exit(4);
}
memset(*dlist, 0, sizeof(struct io_device));
d = *dlist;
for (i = 0; i < 2; i++) {
if ((d->dev_stats[i] = (struct io_stats *) malloc(sizeof(struct io_stats))) == NULL) {
perror("malloc");
exit(4);
}
memset(d->dev_stats[i], 0, sizeof(struct io_stats));
}
if (DISPLAY_DEVMAP_NAME(flags)) {
char *dm_name;
/*
* Save device mapper name (e.g. "dm-0") instead of
* its registered name (e.g. "virtualhd-home")
* This is because we won't read stats for a file named "virtualhd-home" but
* for a file named "dm-0" (we will display "virtualhd-home" anyway at the end
* because option -N has been used).
*/
dm_name = get_dm_name_from_registered_name(name);
if (!dm_name) {
dm_name = name;
}
strncpy(d->name, dm_name, sizeof(d->name) - 1);
}
else {
strncpy(d->name, name, sizeof(d->name));
}
d->name[MAX_NAME_LEN - 1] = '\0';
d->exist = TRUE;
d->next = ds;
if (dtype == T_GROUP) {
d->dev_tp = dtype;
}
else {
int rc = 0;
if (!alt_dir[0] || USE_ALL_DIR(flags)) {
rc = is_device(SLASH_SYS, name, ACCEPT_VIRTUAL_DEVICES);
}
if (alt_dir[0] && (!USE_ALL_DIR(flags) || (USE_ALL_DIR(flags) && !rc))) {
rc = is_device(alt_dir, name, ACCEPT_VIRTUAL_DEVICES);
}
if (rc) {
d->dev_tp = (dtype == T_PART_DEV ? T_PART_DEV : T_DEV);
}
else {
/* This is a partition (T_PART) */
d->dev_tp = T_PART;
}
/* Save major and minor numbers */
if (major != UKWN_MAJ_NR) {
d->major = major;
d->minor = minor;
}
else {
/* Look for device major and minor numbers */
if (get_major_minor_nr(d->name, &maj_nr, &min_nr) == 0) {
d->major = maj_nr;
d->minor = min_nr;
}
}
}
return d;
}
/*
***************************************************************************
* Read sysfs stat for current block device or partition.
*
* IN:
* @filename File name where stats will be read.
* @ios Structure where stats will be saved.
*
* OUT:
* @ios Structure where stats have been saved.
*
* RETURNS:
* 0 on success, -1 otherwise.
***************************************************************************
*/
int read_sysfs_file_stat_work(char *filename, struct io_stats *ios)
{
FILE *fp;
struct io_stats sdev;
int i;
unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks;
unsigned long rd_ios, rd_merges_or_rd_sec, wr_ios, wr_merges;
unsigned long rd_sec_or_wr_ios, wr_sec, rd_ticks_or_wr_sec;
unsigned long dc_ios, dc_merges, dc_sec, fl_ios;
/* Try to read given stat file */
if ((fp = fopen(filename, "r")) == NULL)
return -1;
i = fscanf(fp, "%lu %lu %lu %lu %lu %lu %lu %u %u %u %u %lu %lu %lu %u %lu %u",
&rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios, &rd_ticks_or_wr_sec,
&wr_ios, &wr_merges, &wr_sec, &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks,
&dc_ios, &dc_merges, &dc_sec, &dc_ticks,
&fl_ios, &fl_ticks);
memset(&sdev, 0, sizeof(struct io_stats));
if (i >= 11) {
/* Device or partition */
sdev.rd_ios = rd_ios;
sdev.rd_merges = rd_merges_or_rd_sec;
sdev.rd_sectors = rd_sec_or_wr_ios;
sdev.rd_ticks = (unsigned int) rd_ticks_or_wr_sec;
sdev.wr_ios = wr_ios;
sdev.wr_merges = wr_merges;
sdev.wr_sectors = wr_sec;
sdev.wr_ticks = wr_ticks;
sdev.ios_pgr = ios_pgr;
sdev.tot_ticks = tot_ticks;
sdev.rq_ticks = rq_ticks;
if (i >= 15) {
/* Discard I/O */
sdev.dc_ios = dc_ios;
sdev.dc_merges = dc_merges;
sdev.dc_sectors = dc_sec;
sdev.dc_ticks = dc_ticks;
}
if (i >= 17) {
/* Flush I/O */
sdev.fl_ios = fl_ios;
sdev.fl_ticks = fl_ticks;
}
}
else if (i == 4) {
/* Partition without extended statistics */
sdev.rd_ios = rd_ios;
sdev.rd_sectors = rd_merges_or_rd_sec;
sdev.wr_ios = rd_sec_or_wr_ios;
sdev.wr_sectors = rd_ticks_or_wr_sec;
}
*ios = sdev;
fclose(fp);
return 0;
}
/*
***************************************************************************
* Read sysfs stat for current whole device using /sys or an alternate
* location.
*
* IN:
* @devname Device name for which stats have to be read.
* @ios Structure where stats will be saved.
*
* OUT:
* @ios Structure where stats have been saved.
*
* RETURNS:
* 0 on success, -1 otherwise.
***************************************************************************
*/
int read_sysfs_file_stat(char *devname, struct io_stats *ios)
{
int rc = 0;
char dfile[MAX_PF_NAME];
if (!alt_dir[0] || USE_ALL_DIR(flags)) {
/* Read stats for current whole device using /sys/block/ directory */
snprintf(dfile, sizeof(dfile), "%s/%s/%s/%s",
SLASH_SYS, __BLOCK, devname, S_STAT);
dfile[sizeof(dfile) - 1] = '\0';
rc = read_sysfs_file_stat_work(dfile, ios);
}
if (alt_dir[0] && (!USE_ALL_DIR(flags) || (USE_ALL_DIR(flags) && (rc < 0)))) {
/* Read stats for current whole device using an alternate /sys directory */
snprintf(dfile, sizeof(dfile), "%s/%s/%s/%s",
alt_dir, __BLOCK, devname, S_STAT);
dfile[sizeof(dfile) - 1] = '\0';
rc = read_sysfs_file_stat_work(dfile, ios);
}
return rc;
}
/*
***************************************************************************
* Read sysfs stats for all the partitions of a whole device. Devices are
* saved in the linked list.
*
* IN:
* @curr Index in array for current sample statistics.
* @dname Whole device name.
* @sysdev sysfs location.
*
* RETURNS:
* 0 on success, -1 otherwise.
***************************************************************************
*/
int read_sysfs_device_part_stat_work(int curr, char *dname, char *sysdev)
{
DIR *dir;
struct dirent *drd;
struct io_stats sdev;
struct io_device *d;
char dfile[MAX_PF_NAME], filename[MAX_PF_NAME + 512];
snprintf(dfile, sizeof(dfile), "%s/%s/%s", sysdev, __BLOCK, dname);
dfile[sizeof(dfile) - 1] = '\0';
/* Open current device directory in /sys/block */
if ((dir = __opendir(dfile)) == NULL)
return -1;
/* Get current entry */
while ((drd = __readdir(dir)) != NULL) {
if (!strcmp(drd->d_name, ".") || !strcmp(drd->d_name, ".."))
continue;
snprintf(filename, sizeof(filename), "%s/%s/%s", dfile, drd->d_name, S_STAT);
filename[sizeof(filename) - 1] = '\0';
/* Read current partition stats */
if (read_sysfs_file_stat_work(filename, &sdev) < 0)
continue;
d = add_list_device(&dev_list, drd->d_name, 0, UKWN_MAJ_NR, 0);
if (d != NULL) {
*(d->dev_stats[curr]) = sdev;
}
}
/* Close device directory */
__closedir(dir);
return 0;
}
/*
***************************************************************************
* Read sysfs stats for all the partitions of a whole device.
* Stats are from /sys or an alternate directory.
*
* IN:
* @curr Index in array for current sample statistics.
* @dname Whole device name.
*
* RETURNS:
* 0 on success, -1 otherwise.
***************************************************************************
*/
int read_sysfs_device_part_stat(int curr, char *dname)
{
int rc = 0;
if (!alt_dir[0] || USE_ALL_DIR(flags)) {
/* Read partition stats from /sys */
rc = read_sysfs_device_part_stat_work(curr, dname, SLASH_SYS);
}
if (alt_dir[0] && (!USE_ALL_DIR(flags) || (USE_ALL_DIR(flags) && (rc < 0)))) {
/* Read partition stats from an alternate /sys directory */
rc = read_sysfs_device_part_stat_work(curr, dname, alt_dir);
}
return rc;
}
/*
***************************************************************************
* Read sysfs stats for every whole device. Devices are saved in the linked
* list.
*
* IN:
* @curr Index in array for current sample statistics.
* @sysblock __sys/block directory location.
*
* RETURNS:
* 0 on success, -1 otherwise.
***************************************************************************
*/
int read_sysfs_all_devices_stat_work(int curr, char *sysblock)
{
DIR *dir;
struct dirent *drd;
struct io_stats sdev;
struct io_device *d;
char dfile[MAX_PF_NAME];
/* Open __sys/block directory */
if ((dir = __opendir(sysblock)) == NULL)
return -1;
/* Get current entry */
while ((drd = __readdir(dir)) != NULL) {
if (!strcmp(drd->d_name, ".") || !strcmp(drd->d_name, ".."))
continue;
snprintf(dfile, sizeof(dfile), "%s/%s/%s", sysblock, drd->d_name, S_STAT);
dfile[sizeof(dfile) - 1] = '\0';
/* Read current whole device stats */
if (read_sysfs_file_stat_work(dfile, &sdev) < 0)
continue;
d = add_list_device(&dev_list, drd->d_name, 0, UKWN_MAJ_NR, 0);
if (d != NULL) {
*(d->dev_stats[curr]) = sdev;
}
}
/* Close device directory */
__closedir(dir);
return 0;
}
/*
***************************************************************************
* Read sysfs stats for every whole device from /sys or an alternate
* location.
*
* IN:
* @curr Index in array for current sample statistics.
*
* RETURNS:
* 0 on success, -1 otherwise.
***************************************************************************
*/
int read_sysfs_all_devices_stat(int curr)
{
int rc = 0;
if (!alt_dir[0] || USE_ALL_DIR(flags)) {
/* Read all whole devices from /sys */
rc = read_sysfs_all_devices_stat_work(curr, SYSFS_BLOCK);
}
if (alt_dir[0]) {
char sysblock[MAX_PF_NAME];
snprintf(sysblock, sizeof(sysblock), "%s/%s", alt_dir, __BLOCK);
sysblock[sizeof(sysblock) - 1] = '\0';
/* Read stats from an alternate sys location */
rc = read_sysfs_all_devices_stat_work(curr, sysblock);
}
return rc;
}
/*
***************************************************************************
* Read sysfs stats for a partition using __sys/dev/block/M:m/ directory.
*
* IN:
* @curr Index in array for current sample statistics.
* @d Device structure.
* @sysdev sysfs directory.
*
* RETURNS:
* 0 on success, and -1 otherwise.
***************************************************************************
*/
int read_sysfs_part_stat_work(int curr, struct io_device *d, char *sysdev)
{
char dfile[MAX_PF_NAME];
/* Read stats for device */
snprintf(dfile, sizeof(dfile), "%s/%s/%d:%d/%s",
sysdev, __DEV_BLOCK, d->major, d->minor, S_STAT);
dfile[sizeof(dfile) - 1] = '\0';
return read_sysfs_file_stat_work(dfile, d->dev_stats[curr]);
}
/*
***************************************************************************
* Read sysfs stats for a partition using /sys/dev/block/M:m/ directory or
* an alternate directory.
*
* IN:
* @curr Index in array for current sample statistics.
* @d Device structure.
*
* RETURNS:
* 0 on success, and -1 otherwise.
***************************************************************************
*/
int read_sysfs_part_stat(int curr, struct io_device *d)
{
int rc = 0;
if (!alt_dir[0] || USE_ALL_DIR(flags)) {
/* Read partition stats from /sys */
rc = read_sysfs_part_stat_work(curr, d, SLASH_SYS);
}
if (alt_dir[0] && (!USE_ALL_DIR(flags) || (USE_ALL_DIR(flags) && (rc < 0)))) {
/* Read partition stats from an alternate /sys directory */
rc = read_sysfs_part_stat_work(curr, d, alt_dir);
}
return rc;
}
/*
***************************************************************************
* Read stats from the sysfs filesystem for the devices entered on the
* command line.
*
* IN:
* @curr Index in array for current sample statistics.
***************************************************************************
*/
void read_sysfs_dlist_stat(int curr)
{
struct io_device *dlist;
for (dlist = dev_list; dlist != NULL; dlist = dlist->next) {
if (dlist->exist)
/* Device stats already read */
continue;
else if (dlist->dev_tp == T_PART) {
/*
* This is a partition.
* Read its stats using /sys/dev/block/M:n/ directory.
*/
if (read_sysfs_part_stat(curr, dlist) == 0) {
dlist->exist = TRUE;
}
}
else if ((dlist->dev_tp == T_PART_DEV) || (dlist->dev_tp == T_DEV)) {
/* Read stats for current whole device using /sys/block/ directory */
if (read_sysfs_file_stat(dlist->name, dlist->dev_stats[curr]) == 0) {
dlist->exist = TRUE;
}
if (dlist->dev_tp == T_PART_DEV) {
/* Also read all its partitions now */
read_sysfs_device_part_stat(curr, dlist->name);
}
}
}
/* Read all whole devices stats if requested ("iostat ALL ...") */
if (DISPLAY_ALL_DEVICES(flags)) {
read_sysfs_all_devices_stat(curr);
}
}
/*
***************************************************************************
* Read stats from the diskstats file. Only used when "-p ALL" has been
* entered on the command line.
*
* IN:
* @curr Index in array for current sample statistics.
* @diskstats Path to diskstats file (e.g. "/proc/diskstats").
***************************************************************************
*/
void read_diskstats_stat_work(int curr, char *diskstats)
{
FILE *fp;
char line[256], dev_name[MAX_NAME_LEN];
struct io_device *d;
struct io_stats sdev;
int i;
unsigned int ios_pgr, tot_ticks, rq_ticks, wr_ticks, dc_ticks, fl_ticks;
unsigned long rd_ios, rd_merges_or_rd_sec, rd_ticks_or_wr_sec, wr_ios;
unsigned long wr_merges, rd_sec_or_wr_ios, wr_sec;
unsigned long dc_ios, dc_merges, dc_sec, fl_ios;
unsigned int major, minor;
if ((fp = fopen(diskstats, "r")) == NULL)
return;
while (fgets(line, sizeof(line), fp) != NULL) {
memset(&sdev, 0, sizeof(struct io_stats));
/* major minor name rio rmerge rsect ruse wio wmerge wsect wuse running use aveq dcio dcmerge dcsect dcuse flio fltm */
i = sscanf(line, "%u %u %s %lu %lu %lu %lu %lu %lu %lu %u %u %u %u %lu %lu %lu %u %lu %u",
&major, &minor, dev_name,
&rd_ios, &rd_merges_or_rd_sec, &rd_sec_or_wr_ios, &rd_ticks_or_wr_sec,
&wr_ios, &wr_merges, &wr_sec, &wr_ticks, &ios_pgr, &tot_ticks, &rq_ticks,
&dc_ios, &dc_merges, &dc_sec, &dc_ticks,
&fl_ios, &fl_ticks);
if (i >= 14) {
sdev.rd_ios = rd_ios;
sdev.rd_merges = rd_merges_or_rd_sec;
sdev.rd_sectors = rd_sec_or_wr_ios;
sdev.rd_ticks = (unsigned int) rd_ticks_or_wr_sec;
sdev.wr_ios = wr_ios;
sdev.wr_merges = wr_merges;
sdev.wr_sectors = wr_sec;
sdev.wr_ticks = wr_ticks;
sdev.ios_pgr = ios_pgr;
sdev.tot_ticks = tot_ticks;
sdev.rq_ticks = rq_ticks;
if (i >= 18) {
/* Discard I/O */
sdev.dc_ios = dc_ios;
sdev.dc_merges = dc_merges;
sdev.dc_sectors = dc_sec;
sdev.dc_ticks = dc_ticks;
}
if (i >= 20) {
/* Flush I/O */
sdev.fl_ios = fl_ios;
sdev.fl_ticks = fl_ticks;
}
}
else if (i == 7) {
/* Partition without extended statistics */
if (DISPLAY_EXTENDED(flags))
continue;
sdev.rd_ios = rd_ios;
sdev.rd_sectors = rd_merges_or_rd_sec;
sdev.wr_ios = rd_sec_or_wr_ios;
sdev.wr_sectors = rd_ticks_or_wr_sec;
}
else
/* Unknown entry: Ignore it */
continue;
d = add_list_device(&dev_list, dev_name, 0, major, minor);
if (d != NULL) {
*d->dev_stats[curr] = sdev;
}
}
fclose(fp);
}
/*
***************************************************************************
* Read stats from /proc/diskstats or an alternate diskstats file.
* Only used when "-p ALL" has been entered on the command line.
*
* IN:
* @curr Index in array for current sample statistics.
***************************************************************************
*/
void read_diskstats_stat(int curr)
{
if (!alt_dir[0] || USE_ALL_DIR(flags)) {
/* Read stats from /proc/diskstats */
read_diskstats_stat_work(curr, DISKSTATS);
}
if (alt_dir[0]) {
char diskstats[MAX_PF_NAME];
snprintf(diskstats, sizeof(diskstats), "%s/%s", alt_dir, __DISKSTATS);
diskstats[sizeof(diskstats) - 1] = '\0';
/* Read stats from an alternate diskstats file */
read_diskstats_stat_work(curr, diskstats);
}
}
/*
***************************************************************************
* Add current device statistics to corresponding group.
*
* IN:
* @curr Index in array for current sample statistics.
* @iodev_nr Number of devices and partitions.
***************************************************************************
*/
void compute_device_groups_stats(int curr, struct io_device *d, struct io_device *g)
{
if (!DISPLAY_UNFILTERED(flags)) {
if (!d->dev_stats[curr]->rd_ios &&
!d->dev_stats[curr]->wr_ios &&
!d->dev_stats[curr]->dc_ios &&
!d->dev_stats[curr]->fl_ios)
return;
}
g->dev_stats[curr]->rd_ios += d->dev_stats[curr]->rd_ios;
g->dev_stats[curr]->rd_merges += d->dev_stats[curr]->rd_merges;
g->dev_stats[curr]->rd_sectors += d->dev_stats[curr]->rd_sectors;
g->dev_stats[curr]->rd_ticks += d->dev_stats[curr]->rd_ticks;
g->dev_stats[curr]->wr_ios += d->dev_stats[curr]->wr_ios;
g->dev_stats[curr]->wr_merges += d->dev_stats[curr]->wr_merges;
g->dev_stats[curr]->wr_sectors += d->dev_stats[curr]->wr_sectors;
g->dev_stats[curr]->wr_ticks += d->dev_stats[curr]->wr_ticks;
g->dev_stats[curr]->dc_ios += d->dev_stats[curr]->dc_ios;
g->dev_stats[curr]->dc_merges += d->dev_stats[curr]->dc_merges;
g->dev_stats[curr]->dc_sectors += d->dev_stats[curr]->dc_sectors;
g->dev_stats[curr]->dc_ticks += d->dev_stats[curr]->dc_ticks;
g->dev_stats[curr]->fl_ios += d->dev_stats[curr]->fl_ios;
g->dev_stats[curr]->fl_ticks += d->dev_stats[curr]->fl_ticks;
g->dev_stats[curr]->ios_pgr += d->dev_stats[curr]->ios_pgr;
g->dev_stats[curr]->tot_ticks += d->dev_stats[curr]->tot_ticks;
g->dev_stats[curr]->rq_ticks += d->dev_stats[curr]->rq_ticks;
}
/*
***************************************************************************
* Write current sample's timestamp, either in plain or JSON format.
*
* IN:
* @tab Number of tabs to print.
* @rectime Current date and time.
***************************************************************************
*/
void write_sample_timestamp(int tab, struct tm *rectime)
{
if (DISPLAY_ISO(flags)) {
strftime(timestamp, sizeof(timestamp), "%FT%T%z", rectime);
}
else {
strftime(timestamp, sizeof(timestamp), "%x %X", rectime);
}
if (DISPLAY_JSON_OUTPUT(flags)) {
xprintf(tab, "\"timestamp\": \"%s\",", timestamp);
}
else {
printf("%s\n", timestamp);
}
}
/*
***************************************************************************
* Display CPU utilization in plain format.
*
* IN:
* @curr Index in array for current sample statistics.
* @deltot_jiffies
* Number of jiffies spent on the interval by all processors.
***************************************************************************
*/
void write_plain_cpu_stat(int curr, unsigned long long deltot_jiffies)
{
printf("avg-cpu: %%user %%nice %%system %%iowait %%steal %%idle\n");
printf(" ");
cprintf_xpc(DISPLAY_UNIT(flags), XHIGH, 5, 7, 2,
ll_sp_value(st_cpu[!curr]->cpu_user, st_cpu[curr]->cpu_user, deltot_jiffies),
ll_sp_value(st_cpu[!curr]->cpu_nice, st_cpu[curr]->cpu_nice, deltot_jiffies),
/*
* Time spent in system mode also includes time spent servicing
* hard and soft interrupts.
*/
ll_sp_value(st_cpu[!curr]->cpu_sys + st_cpu[!curr]->cpu_softirq +
st_cpu[!curr]->cpu_hardirq,
st_cpu[curr]->cpu_sys + st_cpu[curr]->cpu_softirq +
st_cpu[curr]->cpu_hardirq, deltot_jiffies),
ll_sp_value(st_cpu[!curr]->cpu_iowait, st_cpu[curr]->cpu_iowait, deltot_jiffies),
ll_sp_value(st_cpu[!curr]->cpu_steal, st_cpu[curr]->cpu_steal, deltot_jiffies));
cprintf_xpc(DISPLAY_UNIT(flags), XLOW, 1, 7, 2,
(st_cpu[curr]->cpu_idle < st_cpu[!curr]->cpu_idle) ?
0.0 :
ll_sp_value(st_cpu[!curr]->cpu_idle, st_cpu[curr]->cpu_idle, deltot_jiffies));