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sa_common.c
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sa_common.c
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/*
* sar and sadf common routines.
* (C) 1999-2014 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 <time.h>
#include <errno.h>
#include <unistd.h> /* For STDOUT_FILENO, among others */
#include <dirent.h>
#include <fcntl.h>
#include <libgen.h>
#include <sys/types.h>
#include <sys/stat.h>
#include "version.h"
#include "sa.h"
#include "common.h"
#include "ioconf.h"
#include "rd_stats.h"
#ifdef USE_NLS
#include <locale.h>
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
int default_file_used = FALSE;
extern struct act_bitmap cpu_bitmap;
/*
***************************************************************************
* Init a bitmap (CPU, IRQ, etc.).
*
* IN:
* @value Value used to init bitmap.
* @sz Size of the bitmap in bytes.
*
* OUT:
* @bitmap Bitmap initialized.
***************************************************************************
*/
void set_bitmap(unsigned char bitmap[], unsigned char value, unsigned int sz)
{
register int i;
for (i = 0; i < sz; i++) {
bitmap[i] = value;
}
}
/*
***************************************************************************
* Allocate structures.
*
* IN:
* @act Array of activities.
***************************************************************************
*/
void allocate_structures(struct activity *act[])
{
int i, j;
for (i = 0; i < NR_ACT; i++) {
if (act[i]->nr > 0) {
for (j = 0; j < 3; j++) {
SREALLOC(act[i]->buf[j], void,
(size_t) act[i]->msize * (size_t) act[i]->nr * (size_t) act[i]->nr2);
}
}
}
}
/*
***************************************************************************
* Free structures.
*
* IN:
* @act Array of activities.
***************************************************************************
*/
void free_structures(struct activity *act[])
{
int i, j;
for (i = 0; i < NR_ACT; i++) {
if (act[i]->nr > 0) {
for (j = 0; j < 3; j++) {
if (act[i]->buf[j]) {
free(act[i]->buf[j]);
act[i]->buf[j] = NULL;
}
}
}
}
}
/*
***************************************************************************
* Try to get device real name from sysfs tree.
*
* IN:
* @major Major number of the device.
* @minor Minor number of the device.
*
* RETURNS:
* The name of the device, which may be the real name (as it appears in /dev)
* or NULL.
***************************************************************************
*/
char *get_devname_from_sysfs(unsigned int major, unsigned int minor)
{
static char link[32], target[PATH_MAX];
char *devname;
ssize_t r;
snprintf(link, 32, "%s/%u:%u", SYSFS_DEV_BLOCK, major, minor);
/* Get full path to device knowing its major and minor numbers */
r = readlink(link, target, PATH_MAX);
if (r <= 0 || r >= PATH_MAX) {
return (NULL);
}
target[r] = '\0';
/* Get device name */
devname = basename(target);
if (!devname || strnlen(devname, FILENAME_MAX) == 0) {
return (NULL);
}
return (devname);
}
/*
***************************************************************************
* Get device real name if possible.
* Warning: This routine may return a bad name on 2.4 kernels where
* disk activities are read from /proc/stat.
*
* IN:
* @major Major number of the device.
* @minor Minor number of the device.
* @pretty TRUE if the real name of the device (as it appears in /dev)
* should be returned.
*
* RETURNS:
* The name of the device, which may be the real name (as it appears in /dev)
* or a string with the following format devM-n.
***************************************************************************
*/
char *get_devname(unsigned int major, unsigned int minor, int pretty)
{
static char buf[32];
char *name;
snprintf(buf, 32, "dev%u-%u", major, minor);
if (!pretty)
return (buf);
name = get_devname_from_sysfs(major, minor);
if (name != NULL)
return (name);
name = ioc_name(major, minor);
if ((name != NULL) && strcmp(name, K_NODEV))
return (name);
return (buf);
}
/*
***************************************************************************
* Check if we are close enough to desired interval.
*
* IN:
* @uptime_ref Uptime used as reference. This is the system uptime for the
* first sample statistics, or the first system uptime after a
* LINUX RESTART.
* @uptime Current system uptime.
* @reset TRUE if @last_uptime should be reset with @uptime_ref.
* @interval Interval of time.
*
* RETURNS:
* 1 if we are actually close enough to desired interval, 0 otherwise.
***************************************************************************
*/
int next_slice(unsigned long long uptime_ref, unsigned long long uptime,
int reset, long interval)
{
unsigned long file_interval, entry;
static unsigned long long last_uptime = 0;
int min, max, pt1, pt2;
double f;
/* uptime is expressed in jiffies (basis of 1 processor) */
if (!last_uptime || reset) {
last_uptime = uptime_ref;
}
/* Interval cannot be greater than 0xffffffff here */
f = ((double) ((uptime - last_uptime) & 0xffffffff)) / HZ;
file_interval = (unsigned long) f;
if ((f * 10) - (file_interval * 10) >= 5) {
file_interval++; /* Rounding to correct value */
}
last_uptime = uptime;
/*
* A few notes about the "algorithm" used here to display selected entries
* from the system activity file (option -f with -i flag):
* Let 'Iu' be the interval value given by the user on the command line,
* 'If' the interval between current and previous line in the system
* activity file,
* and 'En' the nth entry (identified by its time stamp) of the file.
* We choose In = [ En - If/2, En + If/2 [ if If is even,
* or In = [ En - If/2, En + If/2 ] if not.
* En will be displayed if
* (Pn * Iu) or (P'n * Iu) belongs to In
* with Pn = En / Iu and P'n = En / Iu + 1
*/
f = ((double) ((uptime - uptime_ref) & 0xffffffff)) / HZ;
entry = (unsigned long) f;
if ((f * 10) - (entry * 10) >= 5) {
entry++;
}
min = entry - (file_interval / 2);
max = entry + (file_interval / 2) + (file_interval & 0x1);
pt1 = (entry / interval) * interval;
pt2 = ((entry / interval) + 1) * interval;
return (((pt1 >= min) && (pt1 < max)) || ((pt2 >= min) && (pt2 < max)));
}
/*
***************************************************************************
* Use time stamp to fill tstamp structure.
*
* IN:
* @timestamp Timestamp to decode (format: HH:MM:SS).
*
* OUT:
* @tse Structure containing the decoded timestamp.
*
* RETURNS:
* 0 if the timestamp has been successfully decoded, 1 otherwise.
***************************************************************************
*/
int decode_timestamp(char timestamp[], struct tstamp *tse)
{
timestamp[2] = timestamp[5] = '\0';
tse->tm_sec = atoi(×tamp[6]);
tse->tm_min = atoi(×tamp[3]);
tse->tm_hour = atoi(timestamp);
if ((tse->tm_sec < 0) || (tse->tm_sec > 59) ||
(tse->tm_min < 0) || (tse->tm_min > 59) ||
(tse->tm_hour < 0) || (tse->tm_hour > 23))
return 1;
tse->use = TRUE;
return 0;
}
/*
***************************************************************************
* Compare two timestamps.
*
* IN:
* @rectime Date and time for current sample.
* @tse Timestamp used as reference.
*
* RETURNS:
* A positive value if @rectime is greater than @tse,
* a negative one otherwise.
***************************************************************************
*/
int datecmp(struct tm *rectime, struct tstamp *tse)
{
if (rectime->tm_hour == tse->tm_hour) {
if (rectime->tm_min == tse->tm_min)
return (rectime->tm_sec - tse->tm_sec);
else
return (rectime->tm_min - tse->tm_min);
}
else
return (rectime->tm_hour - tse->tm_hour);
}
/*
***************************************************************************
* Parse a timestamp entered on the command line (hh:mm[:ss]) and decode it.
*
* IN:
* @argv Arguments list.
* @opt Index in the arguments list.
* @def_timestamp Default timestamp to use.
*
* OUT:
* @tse Structure containing the decoded timestamp.
*
* RETURNS:
* 0 if the timestamp has been successfully decoded, 1 otherwise.
***************************************************************************
*/
int parse_timestamp(char *argv[], int *opt, struct tstamp *tse,
const char *def_timestamp)
{
char timestamp[9];
if (argv[++(*opt)]) {
switch (strlen(argv[*opt])) {
case 5:
strncpy(timestamp, argv[(*opt)++], 5);
strcat(timestamp,":00");
break;
case 8:
strncpy(timestamp, argv[(*opt)++], 8);
break;
default:
strncpy(timestamp, def_timestamp, 8);
break;
}
} else {
strncpy(timestamp, def_timestamp, 8);
}
timestamp[8] = '\0';
return decode_timestamp(timestamp, tse);
}
/*
***************************************************************************
* Look for the most recent of saDD and saYYYYMMDD to decide which one to
* use. If neither exists then use saDD by default.
*
* IN:
* @sa_dir Directory where standard daily data files are saved.
* @rectime Structure containing the current date.
*
* OUT:
* @sa_name 0 to use saDD data files,
* 1 to use saYYYYMMDD data files.
***************************************************************************
*/
void guess_sa_name(char *sa_dir, struct tm *rectime, int *sa_name)
{
char filename[MAX_FILE_LEN];
struct stat sb;
time_t sa_mtime;
/* Use saDD by default */
*sa_name = 0;
/* Look for saYYYYMMDD */
snprintf(filename, MAX_FILE_LEN,
"%s/sa%04d%02d%02d", sa_dir,
rectime->tm_year + 1900,
rectime->tm_mon + 1,
rectime->tm_mday);
filename[MAX_FILE_LEN - 1] = '\0';
if (stat(filename, &sb) < 0)
/* Cannot find or access saYYYYMMDD, so use saDD */
return;
sa_mtime = sb.st_mtime;
/* Look for saDD */
snprintf(filename, MAX_FILE_LEN,
"%s/sa%02d", sa_dir,
rectime->tm_mday);
filename[MAX_FILE_LEN - 1] = '\0';
if (stat(filename, &sb) < 0) {
/* Cannot find or access saDD, so use saYYYYMMDD */
*sa_name = 1;
return;
}
if (sa_mtime > sb.st_mtime) {
/* saYYYYMMDD is more recent than saDD, so use it */
*sa_name = 1;
}
}
/*
***************************************************************************
* Set current daily data file name.
*
* IN:
* @datafile If not an empty string then this is the alternate directory
* location where daily data files will be saved.
* @d_off Day offset (number of days to go back in the past).
* @sa_name 0 for saDD data files,
* 1 for saYYYYMMDD data files,
* -1 if unknown. In this case, will look for the most recent
* of saDD and saYYYYMMDD and use it.
*
* OUT:
* @datafile Name of daily data file.
***************************************************************************
*/
void set_default_file(char *datafile, int d_off, int sa_name)
{
char sa_dir[MAX_FILE_LEN];
struct tm rectime = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, NULL};
/* Set directory where daily data files will be saved */
if (datafile[0]) {
strncpy(sa_dir, datafile, MAX_FILE_LEN);
}
else {
strncpy(sa_dir, SA_DIR, MAX_FILE_LEN);
}
sa_dir[MAX_FILE_LEN - 1] = '\0';
get_time(&rectime, d_off);
if (sa_name < 0) {
/*
* Look for the most recent of saDD and saYYYYMMDD
* and use it. If neither exists then use saDD.
* sa_name is set accordingly.
*/
guess_sa_name(sa_dir, &rectime, &sa_name);
}
if (sa_name) {
/* Using saYYYYMMDD data files */
snprintf(datafile, MAX_FILE_LEN,
"%s/sa%04d%02d%02d", sa_dir,
rectime.tm_year + 1900,
rectime.tm_mon + 1,
rectime.tm_mday);
}
else {
/* Using saDD data files */
snprintf(datafile, MAX_FILE_LEN,
"%s/sa%02d", sa_dir,
rectime.tm_mday);
}
datafile[MAX_FILE_LEN - 1] = '\0';
default_file_used = TRUE;
}
/*
***************************************************************************
* Check data file type. If it is a directory then this is the alternate
* location where daily data files will be saved.
*
* IN:
* @datafile Name of the daily data file. May be a directory.
* @d_off Day offset (number of days to go back in the past).
* @sa_name 0 for saDD data files,
* 1 for saYYYYMMDD data files,
* -1 if unknown. In this case, will look for the most recent
* of saDD and saYYYYMMDD and use it.
*
*
* OUT:
* @datafile Name of the daily data file. This is now a plain file, not
* a directory.
*
* RETURNS:
* 1 if @datafile was a directory, and 0 otherwise.
***************************************************************************
*/
int check_alt_sa_dir(char *datafile, int d_off, int sa_name)
{
struct stat sb;
if (stat(datafile, &sb) == 0) {
if (S_ISDIR(sb.st_mode)) {
/*
* This is a directory: So append
* the default file name to it.
*/
set_default_file(datafile, d_off, sa_name);
return 1;
}
}
return 0;
}
/*
***************************************************************************
* Set interval value.
*
* IN:
* @record_hdr_curr Record with current sample statistics.
* @record_hdr_prev Record with previous sample statistics.
* @nr_proc Number of CPU, including CPU "all".
*
* OUT:
* @itv Interval in jiffies.
* @g_itv Interval in jiffies multiplied by the # of proc.
***************************************************************************
*/
void get_itv_value(struct record_header *record_hdr_curr,
struct record_header *record_hdr_prev,
unsigned int nr_proc,
unsigned long long *itv, unsigned long long *g_itv)
{
/* Interval value in jiffies */
*g_itv = get_interval(record_hdr_prev->uptime,
record_hdr_curr->uptime);
if (nr_proc > 2) {
*itv = get_interval(record_hdr_prev->uptime0,
record_hdr_curr->uptime0);
}
else {
*itv = *g_itv;
}
}
/*
***************************************************************************
* Fill the rectime structure with the file's creation date, based on file's
* time data saved in file header.
* The resulting timestamp is expressed in the locale of the file creator or
* in the user's own locale, depending on whether option -t has been used
* or not.
*
* IN:
* @flags Flags for common options and system state.
* @file_hdr System activity file standard header.
*
* OUT:
* @rectime Date (and possibly time) from file header. Only the date,
* not the time, should be used by the caller.
***************************************************************************
*/
void get_file_timestamp_struct(unsigned int flags, struct tm *rectime,
struct file_header *file_hdr)
{
struct tm *loc_t;
if (PRINT_TRUE_TIME(flags)) {
/* Get local time. This is just to fill fields with a default value. */
get_time(rectime, 0);
rectime->tm_mday = file_hdr->sa_day;
rectime->tm_mon = file_hdr->sa_month;
rectime->tm_year = file_hdr->sa_year;
/*
* Call mktime() to set DST (Daylight Saving Time) flag.
* Has anyone a better way to do it?
*/
rectime->tm_hour = rectime->tm_min = rectime->tm_sec = 0;
mktime(rectime);
}
else {
if ((loc_t = localtime((const time_t *) &file_hdr->sa_ust_time)) != NULL) {
*rectime = *loc_t;
}
}
}
/*
***************************************************************************
* Print report header.
*
* IN:
* @flags Flags for common options and system state.
* @file_hdr System activity file standard header.
* @cpu_nr Number of CPU (value in [1, NR_CPUS + 1]).
* 1 means that there is only one proc and non SMP kernel.
* 2 means one proc and SMP kernel.
* Etc.
*
* OUT:
* @rectime Date and time from file header.
***************************************************************************
*/
void print_report_hdr(unsigned int flags, struct tm *rectime,
struct file_header *file_hdr, int cpu_nr)
{
/* Get date of file creation */
get_file_timestamp_struct(flags, rectime, file_hdr);
/* Display the header */
print_gal_header(rectime, file_hdr->sa_sysname, file_hdr->sa_release,
file_hdr->sa_nodename, file_hdr->sa_machine,
cpu_nr > 1 ? cpu_nr - 1 : 1);
}
/*
***************************************************************************
* Network interfaces may now be registered (and unregistered) dynamically.
* This is what we try to guess here.
*
* IN:
* @a Activity structure with statistics.
* @curr Index in array for current sample statistics.
* @ref Index in array for sample statistics used as reference.
* @pos Index on current network interface.
*
* RETURNS:
* Position of current network interface in array of sample statistics used
* as reference.
***************************************************************************
*/
unsigned int check_net_dev_reg(struct activity *a, int curr, int ref,
unsigned int pos)
{
struct stats_net_dev *sndc, *sndp;
unsigned int index = 0;
sndc = (struct stats_net_dev *) a->buf[curr] + pos;
while (index < a->nr) {
sndp = (struct stats_net_dev *) a->buf[ref] + index;
if (!strcmp(sndc->interface, sndp->interface)) {
/*
* Network interface found.
* If a counter has decreased, then we may assume that the
* corresponding interface was unregistered, then registered again.
*/
if ((sndc->rx_packets < sndp->rx_packets) ||
(sndc->tx_packets < sndp->tx_packets) ||
(sndc->rx_bytes < sndp->rx_bytes) ||
(sndc->tx_bytes < sndp->tx_bytes) ||
(sndc->rx_compressed < sndp->rx_compressed) ||
(sndc->tx_compressed < sndp->tx_compressed) ||
(sndc->multicast < sndp->multicast)) {
/*
* Special processing for rx_bytes (_packets) and
* tx_bytes (_packets) counters: If the number of
* bytes (packets) has decreased, whereas the number of
* packets (bytes) has increased, then assume that the
* relevant counter has met an overflow condition, and that
* the interface was not unregistered, which is all the
* more plausible that the previous value for the counter
* was > ULONG_MAX/2.
* NB: the average value displayed will be wrong in this case...
*
* If such an overflow is detected, just set the flag. There is no
* need to handle this in a special way: the difference is still
* properly calculated if the result is of the same type (i.e.
* unsigned long) as the two values.
*/
int ovfw = FALSE;
if ((sndc->rx_bytes < sndp->rx_bytes) &&
(sndc->rx_packets > sndp->rx_packets) &&
(sndp->rx_bytes > (~0UL >> 1))) {
ovfw = TRUE;
}
if ((sndc->tx_bytes < sndp->tx_bytes) &&
(sndc->tx_packets > sndp->tx_packets) &&
(sndp->tx_bytes > (~0UL >> 1))) {
ovfw = TRUE;
}
if ((sndc->rx_packets < sndp->rx_packets) &&
(sndc->rx_bytes > sndp->rx_bytes) &&
(sndp->rx_packets > (~0UL >> 1))) {
ovfw = TRUE;
}
if ((sndc->tx_packets < sndp->tx_packets) &&
(sndc->tx_bytes > sndp->tx_bytes) &&
(sndp->tx_packets > (~0UL >> 1))) {
ovfw = TRUE;
}
if (!ovfw) {
/*
* OK: assume here that the device was
* actually unregistered.
*/
memset(sndp, 0, STATS_NET_DEV_SIZE);
strcpy(sndp->interface, sndc->interface);
}
}
return index;
}
index++;
}
/* Network interface not found: Look for the first free structure */
for (index = 0; index < a->nr; index++) {
sndp = (struct stats_net_dev *) a->buf[ref] + index;
if (!strcmp(sndp->interface, "?")) {
memset(sndp, 0, STATS_NET_DEV_SIZE);
strcpy(sndp->interface, sndc->interface);
break;
}
}
if (index >= a->nr) {
/* No free structure: Default is structure of same rank */
index = pos;
}
sndp = (struct stats_net_dev *) a->buf[ref] + index;
/* Since the name is not the same, reset all the structure */
memset(sndp, 0, STATS_NET_DEV_SIZE);
strcpy(sndp->interface, sndc->interface);
return index;
}
/*
***************************************************************************
* Network interfaces may now be registered (and unregistered) dynamically.
* This is what we try to guess here.
*
* IN:
* @a Activity structure with statistics.
* @curr Index in array for current sample statistics.
* @ref Index in array for sample statistics used as reference.
* @pos Index on current network interface.
*
* RETURNS:
* Position of current network interface in array of sample statistics used
* as reference.
***************************************************************************
*/
unsigned int check_net_edev_reg(struct activity *a, int curr, int ref,
unsigned int pos)
{
struct stats_net_edev *snedc, *snedp;
unsigned int index = 0;
snedc = (struct stats_net_edev *) a->buf[curr] + pos;
while (index < a->nr) {
snedp = (struct stats_net_edev *) a->buf[ref] + index;
if (!strcmp(snedc->interface, snedp->interface)) {
/*
* Network interface found.
* If a counter has decreased, then we may assume that the
* corresponding interface was unregistered, then registered again.
*/
if ((snedc->tx_errors < snedp->tx_errors) ||
(snedc->collisions < snedp->collisions) ||
(snedc->rx_dropped < snedp->rx_dropped) ||
(snedc->tx_dropped < snedp->tx_dropped) ||
(snedc->tx_carrier_errors < snedp->tx_carrier_errors) ||
(snedc->rx_frame_errors < snedp->rx_frame_errors) ||
(snedc->rx_fifo_errors < snedp->rx_fifo_errors) ||
(snedc->tx_fifo_errors < snedp->tx_fifo_errors)) {
/*
* OK: assume here that the device was
* actually unregistered.
*/
memset(snedp, 0, STATS_NET_EDEV_SIZE);
strcpy(snedp->interface, snedc->interface);
}
return index;
}
index++;
}
/* Network interface not found: Look for the first free structure */
for (index = 0; index < a->nr; index++) {
snedp = (struct stats_net_edev *) a->buf[ref] + index;
if (!strcmp(snedp->interface, "?")) {
memset(snedp, 0, STATS_NET_EDEV_SIZE);
strcpy(snedp->interface, snedc->interface);
break;
}
}
if (index >= a->nr) {
/* No free structure: Default is structure of same rank */
index = pos;
}
snedp = (struct stats_net_edev *) a->buf[ref] + index;
/* Since the name is not the same, reset all the structure */
memset(snedp, 0, STATS_NET_EDEV_SIZE);
strcpy(snedp->interface, snedc->interface);
return index;
}
/*
***************************************************************************
* Disks may be registered dynamically (true in /proc/stat file).
* This is what we try to guess here.
*
* IN:
* @a Activity structure with statistics.
* @curr Index in array for current sample statistics.
* @ref Index in array for sample statistics used as reference.
* @pos Index on current disk.
*
* RETURNS:
* Position of current disk in array of sample statistics used as reference.
***************************************************************************
*/
int check_disk_reg(struct activity *a, int curr, int ref, int pos)
{
struct stats_disk *sdc, *sdp;
int index = 0;
sdc = (struct stats_disk *) a->buf[curr] + pos;
while (index < a->nr) {
sdp = (struct stats_disk *) a->buf[ref] + index;
if ((sdc->major == sdp->major) &&
(sdc->minor == sdp->minor)) {
/*
* Disk found.
* If all the counters have decreased then the likelyhood
* is that the disk has been unregistered and a new disk inserted.
* If only one or two have decreased then the likelyhood
* is that the counter has simply wrapped.
*/
if ((sdc->nr_ios < sdp->nr_ios) &&
(sdc->rd_sect < sdp->rd_sect) &&
(sdc->wr_sect < sdp->wr_sect)) {
memset(sdp, 0, STATS_DISK_SIZE);
sdp->major = sdc->major;
sdp->minor = sdc->minor;
}
return index;
}
index++;
}
/* Disk not found: Look for the first free structure */
for (index = 0; index < a->nr; index++) {
sdp = (struct stats_disk *) a->buf[ref] + index;
if (!(sdp->major + sdp->minor)) {
memset(sdp, 0, STATS_DISK_SIZE);
sdp->major = sdc->major;
sdp->minor = sdc->minor;
break;
}
}
if (index >= a->nr) {
/* No free structure found: Default is structure of same rank */
index = pos;
}
sdp = (struct stats_disk *) a->buf[ref] + index;
/* Since the device is not the same, reset all the structure */
memset(sdp, 0, STATS_DISK_SIZE);
sdp->major = sdc->major;
sdp->minor = sdc->minor;
return index;
}
/*
***************************************************************************
* Allocate bitmaps for activities that have one.
*
* IN:
* @act Array of activities.
***************************************************************************
*/
void allocate_bitmaps(struct activity *act[])
{
int i;
for (i = 0; i < NR_ACT; i++) {
/*
* If current activity has a bitmap which has not already
* been allocated, then allocate it.
* Note that a same bitmap may be used by several activities.
*/
if (act[i]->bitmap && !act[i]->bitmap->b_array) {
SREALLOC(act[i]->bitmap->b_array, unsigned char,
BITMAP_SIZE(act[i]->bitmap->b_size));
}
}
}
/*
***************************************************************************
* Free bitmaps for activities that have one.
*
* IN:
* @act Array of activities.
***************************************************************************
*/
void free_bitmaps(struct activity *act[])
{
int i;
for (i = 0; i < NR_ACT; i++) {
if (act[i]->bitmap && act[i]->bitmap->b_array) {
free(act[i]->bitmap->b_array);
/* Set pointer to NULL to prevent it from being freed again */
act[i]->bitmap->b_array = NULL;
}
}
}
/*
***************************************************************************
* Look for activity in array.
*
* IN:
* @act Array of activities.
* @act_flag Activity flag to look for.
* @stop TRUE if sysstat should exit when activity is not found.
*
* RETURNS:
* Position of activity in array, or -1 if not found (this may happen when
* reading data from a system activity file created by another version of
* sysstat).
***************************************************************************
*/
int get_activity_position(struct activity *act[], unsigned int act_flag, int stop)
{
int i;
for (i = 0; i < NR_ACT; i++) {
if (act[i]->id == act_flag)
return i;
}
if (stop) {
PANIC((int) act_flag);
}
return -1;
}
/*
***************************************************************************
* Count number of activities with given option.
*
* IN:
* @act Array of activities.
* @option Option that activities should have to be counted
* (eg. AO_COLLECTED...)
* @count_outputs TRUE if each output should be counted for activities with
* multiple outputs.
*
* RETURNS:
* Number of selected activities
***************************************************************************
*/
int get_activity_nr(struct activity *act[], unsigned int option, int count_outputs)
{
int i, n = 0;
unsigned int msk;
for (i = 0; i < NR_ACT; i++) {
if ((act[i]->options & option) == option) {
if (HAS_MULTIPLE_OUTPUTS(act[i]->options) && count_outputs) {
for (msk = 1; msk < 0x100; msk <<= 1) {
if ((act[i]->opt_flags & 0xff) & msk) {
n++;
}
}
}
else {
n++;
}
}
}
return n;
}
/*
***************************************************************************
* Select all activities, even if they have no associated items.
*
* IN:
* @act Array of activities.
*
* OUT:
* @act Array of activities, all of the being selected.