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core-vmstat.c
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core-vmstat.c
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/*
* Copyright (C) 2021 Canonical, Ltd.
* Copyright (C) 2021-2023 Colin Ian King
*
* 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 even 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 02110-1301, USA.
*
*/
#include "stress-ng.h"
#include "core-pragma.h"
#include "core-thermal-zone.h"
#if defined(HAVE_MACH_MACH_H)
#include <mach/mach.h>
#endif
#if defined(HAVE_MACH_MACHINE_H)
#include <mach/machine.h>
#endif
#if defined(HAVE_MACH_VM_STATISTICS_H)
#include <mach/vm_statistics.h>
#endif
#if defined(HAVE_SYS_SYSCTL_H)
STRESS_PRAGMA_PUSH
STRESS_PRAGMA_WARN_CPP_OFF
#include <sys/sysctl.h>
STRESS_PRAGMA_POP
#endif
#include <float.h>
#if defined(HAVE_SYS_SYSMACROS_H)
#include <sys/sysmacros.h>
#endif
#if defined(HAVE_SYS_VMMETER_H)
#include <sys/vmmeter.h>
#endif
#if defined(HAVE_UVM_UVM_EXTERN_H)
#include <uvm/uvm_extern.h>
#endif
#if defined(HAVE_MNTENT_H)
#include <mntent.h>
#endif
/* vmstat information */
typedef struct { /* vmstat column */
uint64_t procs_running; /* r */
uint64_t procs_blocked; /* b */
uint64_t swap_total; /* swpd info, total */
uint64_t swap_free; /* swpd info, free */
uint64_t swap_used; /* swpd used = total - free */
uint64_t memory_free; /* free */
uint64_t memory_buff; /* buff */
uint64_t memory_cached; /* cached */
uint64_t memory_reclaimable; /* reclaimabled cached */
uint64_t swap_in; /* si */
uint64_t swap_out; /* so */
uint64_t block_in; /* bi */
uint64_t block_out; /* bo */
uint64_t interrupt; /* in */
uint64_t context_switch; /* cs */
uint64_t user_time; /* us */
uint64_t system_time; /* sy */
uint64_t idle_time; /* id */
uint64_t wait_time; /* wa */
uint64_t stolen_time; /* st */
} stress_vmstat_t;
/* iostat information, from /sys/block/$dev/stat */
typedef struct {
uint64_t read_io; /* number of read I/Os processed */
uint64_t read_merges; /* number of read I/Os merged with in-queue I/O */
uint64_t read_sectors; /* number of sectors read */
uint64_t read_ticks; /* total wait time for read requests */
uint64_t write_io; /* number of write I/Os processed */
uint64_t write_merges; /* number of write I/Os merged with in-queue I/O */
uint64_t write_sectors; /* number of sectors written */
uint64_t write_ticks; /* total wait time for write requests */
uint64_t in_flight; /* number of I/Os currently in flight */
uint64_t io_ticks; /* total time this block device has been active */
uint64_t time_in_queue; /* total wait time for all requests */
uint64_t discard_io; /* number of discard I/Os processed */
uint64_t discard_merges; /* number of discard I/Os merged with in-queue I/O */
uint64_t discard_sectors;/* number of sectors discarded */
uint64_t discard_ticks; /* total wait time for discard requests */
} stress_iostat_t;
static int32_t vmstat_delay = 0;
static int32_t thermalstat_delay = 0;
static int32_t iostat_delay = 0;
#if defined(__FreeBSD__)
static void freebsd_get_cpu_time(
uint64_t *user_time,
uint64_t *system_time,
uint64_t *idle_time)
{
const int cpus = stress_bsd_getsysctl_int("kern.smp.cpus");
long int *vals;
int i;
*user_time = 0;
*system_time = 0;
*idle_time = 0;
vals = (long int *)calloc(cpus * 5, sizeof(*vals));
if (!vals)
return;
if (stress_bsd_getsysctl("kern.cp_times", vals, cpus * 5 * sizeof(*vals)) < 0)
return;
for (i = 0; i < cpus * 5; i += 5) {
*user_time += vals[i];
*system_time += vals[i + 2];
*idle_time += vals[i + 4];
}
free(vals);
}
#endif
#if defined(__NetBSD__)
static void netbsd_get_cpu_time(
uint64_t *user_time,
uint64_t *system_time,
uint64_t *idle_time)
{
long int vals[5];
*user_time = 0;
*system_time = 0;
*idle_time = 0;
if (stress_bsd_getsysctl("kern.cp_time", vals, sizeof(vals)) < 0)
return;
*user_time = vals[0];
*system_time = vals[2];
*idle_time = vals[4];;
}
#endif
static int stress_set_generic_stat(
const char *const opt,
const char *name,
int32_t *delay)
{
*delay = stress_get_int32(opt);
if ((*delay < 1) || (*delay > 3600)) {
(void)fprintf(stderr, "%s must in the range 1 to 3600.\n", name);
_exit(EXIT_FAILURE);
}
return 0;
}
int stress_set_vmstat(const char *const opt)
{
return stress_set_generic_stat(opt, "vmstat", &vmstat_delay);
}
int stress_set_thermalstat(const char *const opt)
{
g_opt_flags |= OPT_FLAGS_TZ_INFO;
return stress_set_generic_stat(opt, "thermalstat", &thermalstat_delay);
}
int stress_set_iostat(const char *const opt)
{
return stress_set_generic_stat(opt, "iostat", &iostat_delay);
}
/*
* stress_find_mount_dev()
* find the path of the device that the file is located on
*/
char *stress_find_mount_dev(const char *name)
{
#if defined(__linux__) && \
defined(HAVE_GETMNTENT) && \
defined(HAVE_ENDMNTENT) && \
defined(HAVE_SETMNTENT)
static char dev_path[PATH_MAX];
struct stat statbuf;
dev_t dev;
FILE *mtab_fp;
struct mntent *mnt;
if (stat(name, &statbuf) < 0)
return NULL;
/* Cater for UBI char mounts */
if (S_ISBLK(statbuf.st_mode) || S_ISCHR(statbuf.st_mode))
dev = statbuf.st_rdev;
else
dev = statbuf.st_dev;
/* Try /proc/mounts then /etc/mtab */
mtab_fp = setmntent("/proc/mounts", "r");
if (!mtab_fp) {
mtab_fp = setmntent("/etc/mtab", "r");
if (!mtab_fp)
return NULL;
}
while ((mnt = getmntent(mtab_fp))) {
if ((!strcmp(name, mnt->mnt_dir)) ||
(!strcmp(name, mnt->mnt_fsname)))
break;
if ((mnt->mnt_fsname[0] == '/') &&
(stat(mnt->mnt_fsname, &statbuf) == 0) &&
(statbuf.st_rdev == dev))
break;
if ((stat(mnt->mnt_dir, &statbuf) == 0) &&
(statbuf.st_dev == dev))
break;
}
(void)endmntent(mtab_fp);
if (!mnt)
return NULL;
if (!mnt->mnt_fsname)
return NULL;
return realpath(mnt->mnt_fsname, dev_path);
#elif defined(HAVE_SYS_SYSMACROS_H)
static char dev_path[PATH_MAX];
struct stat statbuf;
dev_t dev;
DIR *dir;
struct dirent *d;
dev_t majdev;
if (stat(name, &statbuf) < 0)
return NULL;
/* Cater for UBI char mounts */
if (S_ISBLK(statbuf.st_mode) || S_ISCHR(statbuf.st_mode))
dev = statbuf.st_rdev;
else
dev = statbuf.st_dev;
majdev = makedev(major(dev), 0);
dir = opendir("/dev");
if (!dir)
return NULL;
while ((d = readdir(dir)) != NULL) {
int ret;
struct stat stat_buf;
stress_mk_filename(dev_path, sizeof(dev_path), "/dev", d->d_name);
ret = stat(dev_path, &stat_buf);
if ((ret == 0) &&
(S_ISBLK(stat_buf.st_mode)) &&
(stat_buf.st_rdev == majdev)) {
(void)closedir(dir);
return dev_path;
}
}
(void)closedir(dir);
return NULL;
#else
(void)name;
return NULL;
#endif
}
static pid_t vmstat_pid;
#if defined(HAVE_SYS_SYSMACROS_H) && \
defined(__linux__)
/*
* stress_iostat_iostat_name()
* from the stress-ng temp file path try to determine
* the iostat file /sys/block/$dev/stat for that file.
*/
static char *stress_iostat_iostat_name(
char *iostat_name,
const size_t iostat_name_len)
{
char *temp_path, *dev, *ptr;
struct stat statbuf;
/* Resolve links */
temp_path = realpath(stress_get_temp_path(), NULL);
if (!temp_path)
return NULL;
/* Find device */
dev = stress_find_mount_dev(temp_path);
if (!dev)
return NULL;
/* Skip over leading /dev */
if (!strncmp(dev, "/dev", 4))
dev += 4;
if (*dev == '/')
dev++;
ptr = dev + strlen(dev) - 1;
/*
* Try /dev/sda12, then /dev/sda1, then /dev/sda, then terminate
*/
while (ptr >= dev) {
(void)snprintf(iostat_name, iostat_name_len, "/sys/block/%s/stat", dev);
if (stat(iostat_name, &statbuf) == 0)
return iostat_name;
if (!isdigit(*ptr))
break;
*ptr = '\0';
ptr--;
}
return NULL;
}
/*
* stress_read_iostat()
* read the stats from an iostat stat file, linux variant
*/
static void stress_read_iostat(const char *iostat_name, stress_iostat_t *iostat)
{
FILE *fp;
fp = fopen(iostat_name, "r");
if (fp) {
int ret;
ret = fscanf(fp,
"%" PRIu64 " %" PRIu64
" %" PRIu64 " %" PRIu64
" %" PRIu64 " %" PRIu64
" %" PRIu64 " %" PRIu64
" %" PRIu64 " %" PRIu64
" %" PRIu64 " %" PRIu64
" %" PRIu64 " %" PRIu64
" %" PRIu64,
&iostat->read_io, &iostat->read_merges,
&iostat->read_sectors, &iostat->read_ticks,
&iostat->write_io, &iostat->write_merges,
&iostat->write_sectors, &iostat->write_ticks,
&iostat->in_flight, &iostat->io_ticks,
&iostat->time_in_queue,
&iostat->discard_io, &iostat->discard_merges,
&iostat->discard_sectors, &iostat->discard_ticks);
(void)fclose(fp);
if (ret != 15)
(void)memset(iostat, 0, sizeof(*iostat));
}
}
#define STRESS_IOSTAT_DELTA(field) \
iostat->field = ((iostat_current.field > iostat_prev.field) ? \
(iostat_current.field - iostat_prev.field) : 0)
/*
* stress_get_iostat()
* read and compute delta since last read of iostats
*/
static void stress_get_iostat(const char *iostat_name, stress_iostat_t *iostat)
{
static stress_iostat_t iostat_prev;
stress_iostat_t iostat_current;
(void)memset(&iostat_current, 0, sizeof(iostat_current));
stress_read_iostat(iostat_name, &iostat_current);
STRESS_IOSTAT_DELTA(read_io);
STRESS_IOSTAT_DELTA(read_merges);
STRESS_IOSTAT_DELTA(read_sectors);
STRESS_IOSTAT_DELTA(read_ticks);
STRESS_IOSTAT_DELTA(write_io);
STRESS_IOSTAT_DELTA(write_merges);
STRESS_IOSTAT_DELTA(write_sectors);
STRESS_IOSTAT_DELTA(write_ticks);
STRESS_IOSTAT_DELTA(in_flight);
STRESS_IOSTAT_DELTA(io_ticks);
STRESS_IOSTAT_DELTA(time_in_queue);
STRESS_IOSTAT_DELTA(discard_io);
STRESS_IOSTAT_DELTA(discard_merges);
STRESS_IOSTAT_DELTA(discard_sectors);
STRESS_IOSTAT_DELTA(discard_ticks);
(void)memcpy(&iostat_prev, &iostat_current, sizeof(iostat_prev));
}
#endif
#if defined(__linux__)
/*
* stress_next_field()
* skip to next field, returns false if end of
* string and/or no next field.
*/
static bool stress_next_field(char **str)
{
char *ptr = *str;
while (*ptr && *ptr != ' ')
ptr++;
if (!*ptr)
return false;
while (*ptr == ' ')
ptr++;
if (!*ptr)
return false;
*str = ptr;
return true;
}
/*
* stress_read_vmstat()
* read vmstat statistics
*/
static void stress_read_vmstat(stress_vmstat_t *vmstat)
{
FILE *fp;
char buffer[1024];
fp = fopen("/proc/stat", "r");
if (fp) {
while (fgets(buffer, sizeof(buffer), fp)) {
char *ptr = buffer;
if (!strncmp(buffer, "cpu ", 4))
continue;
if (!strncmp(buffer, "cpu", 3)) {
if (!stress_next_field(&ptr))
continue;
/* user time */
vmstat->user_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* user time nice */
vmstat->user_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* system time */
vmstat->system_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* idle time */
vmstat->idle_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* iowait time */
vmstat->wait_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* irq time, account in system time */
vmstat->system_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* soft time, account in system time */
vmstat->system_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* stolen time */
vmstat->stolen_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* guest time, add to stolen stats */
vmstat->stolen_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* guest_nice time, add to stolen stats */
vmstat->stolen_time += (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
}
if (!strncmp(buffer, "intr", 4)) {
if (!stress_next_field(&ptr))
continue;
/* interrupts */
vmstat->interrupt = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "ctxt", 4)) {
if (!stress_next_field(&ptr))
continue;
/* context switches */
vmstat->context_switch = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "procs_running", 13)) {
if (!stress_next_field(&ptr))
continue;
/* processes running */
vmstat->procs_running = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "procs_blocked", 13)) {
if (!stress_next_field(&ptr))
continue;
/* procesess blocked */
vmstat->procs_blocked = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "swap", 4)) {
if (!stress_next_field(&ptr))
continue;
/* swap in */
vmstat->swap_in = (uint64_t)atoll(ptr);
if (!stress_next_field(&ptr))
continue;
/* swap out */
vmstat->swap_out = (uint64_t)atoll(ptr);
}
}
(void)fclose(fp);
}
fp = fopen("/proc/meminfo", "r");
if (fp) {
while (fgets(buffer, sizeof(buffer), fp)) {
char *ptr = buffer;
if (!strncmp(buffer, "MemFree", 7)) {
if (!stress_next_field(&ptr))
continue;
vmstat->memory_free = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "Buffers", 7)) {
if (!stress_next_field(&ptr))
continue;
vmstat->memory_buff = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "Cached", 6)) {
if (!stress_next_field(&ptr))
continue;
vmstat->memory_cached = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "KReclaimable", 12)) {
if (!stress_next_field(&ptr))
continue;
vmstat->memory_reclaimable = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "SwapTotal", 9)) {
if (!stress_next_field(&ptr))
continue;
vmstat->swap_total = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "SwapFree", 8)) {
if (!stress_next_field(&ptr))
continue;
vmstat->swap_free = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "SwapUsed", 8)) {
if (!stress_next_field(&ptr))
continue;
vmstat->swap_used = (uint64_t)atoll(ptr);
}
}
(void)fclose(fp);
if ((vmstat->swap_used == 0) &&
(vmstat->swap_free > 0) &&
(vmstat->swap_total > 0)) {
vmstat->swap_used = vmstat->swap_total - vmstat->swap_free;
}
}
fp = fopen("/proc/vmstat", "r");
if (fp) {
while (fgets(buffer, sizeof(buffer), fp)) {
char *ptr = buffer;
if (!strncmp(buffer, "pgpgin", 6)) {
if (!stress_next_field(&ptr))
continue;
vmstat->block_in = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "pgpgout", 7)) {
if (!stress_next_field(&ptr))
continue;
vmstat->block_out = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "pswpin", 6)) {
if (!stress_next_field(&ptr))
continue;
vmstat->swap_in = (uint64_t)atoll(ptr);
}
if (!strncmp(buffer, "pswpout", 7)) {
if (!stress_next_field(&ptr))
continue;
vmstat->swap_out = (uint64_t)atoll(ptr);
}
}
(void)fclose(fp);
}
}
#elif defined(__FreeBSD__)
/*
* stress_read_vmstat()
* read vmstat statistics, FreeBSD variant, partially implemented
*/
static void stress_read_vmstat(stress_vmstat_t *vmstat)
{
#if defined(HAVE_SYS_VMMETER_H)
struct vmtotal t;
#endif
vmstat->interrupt = stress_bsd_getsysctl_uint64("vm.stats.sys.v_intr");
vmstat->context_switch = stress_bsd_getsysctl_uint64("vm.stats.sys.v_swtch");
vmstat->swap_in = stress_bsd_getsysctl_uint64("vm.stats.vm.v_swapin");
vmstat->swap_out = stress_bsd_getsysctl_uint64("vm.stats.vm.v_swapout");
vmstat->block_in = stress_bsd_getsysctl_uint64("vm.stats.vm.v_vnodepgsin");
vmstat->block_out = stress_bsd_getsysctl_uint64("vm.stats.vm.v_vnodepgsin");
vmstat->memory_free = (uint64_t)stress_bsd_getsysctl_uint32("vm.stats.vm.v_free_count");
vmstat->memory_cached = (uint64_t)stress_bsd_getsysctl_uint("vm.stats.vm.v_cache_count");
freebsd_get_cpu_time(&vmstat->user_time, &vmstat->system_time, &vmstat->idle_time);
#if defined(HAVE_SYS_VMMETER_H)
if (stress_bsd_getsysctl("vm.vmtotal", &t, sizeof(t)) == 0) {
vmstat->procs_running = t.t_rq - 1;
vmstat->procs_blocked = t.t_dw + t.t_pw;
}
#endif
}
#elif defined(__NetBSD__)
/*
* stress_read_vmstat()
* read vmstat statistics, NetBSD variant, partially implemented
*/
static void stress_read_vmstat(stress_vmstat_t *vmstat)
{
#if defined(HAVE_SYS_VMMETER_H)
struct vmtotal t;
#endif
#if defined(HAVE_UVM_UVM_EXTERN_H)
struct uvmexp_sysctl u;
#endif
netbsd_get_cpu_time(&vmstat->user_time, &vmstat->system_time, &vmstat->idle_time);
#if defined(HAVE_UVM_UVM_EXTERN_H)
if (stress_bsd_getsysctl("vm.uvmexp2", &u, sizeof(u)) == 0) {
vmstat->memory_cached = u.filepages; /* Guess */
vmstat->interrupt = u.intrs;
vmstat->context_switch = u.swtch;
vmstat->swap_in = u.pgswapin;
vmstat->swap_out = u.pgswapout;
vmstat->swap_used = u.swpginuse;
vmstat->memory_free = u.free;
}
#endif
#if defined(HAVE_SYS_VMMETER_H)
if (stress_bsd_getsysctl("vm.vmmeter", &t, sizeof(t)) == 0) {
vmstat->procs_running = t.t_rq - 1;
vmstat->procs_blocked = t.t_dw + t.t_pw;
}
#endif
}
#elif defined(__APPLE__) && \
defined(HAVE_SYS_SYSCTL_H) && \
defined(HAVE_MACH_MACH_H) && \
defined(HAVE_MACH_VM_STATISTICS_H)
/*
* stress_read_vmstat()
* read vmstat statistics, OS X variant, partially implemented
*/
static void stress_read_vmstat(stress_vmstat_t *vmstat)
{
vm_statistics64_data_t vm_stat;
struct xsw_usage xsu;
mach_port_t host = mach_host_self();
natural_t count = HOST_VM_INFO64_COUNT;
size_t page_size = stress_get_page_size();
int ret;
(void)memset(&vm_stat, 0, sizeof(vmstat));
ret = host_statistics64(host, HOST_VM_INFO64, (host_info64_t)&vm_stat, &count);
if (ret >= 0) {
vmstat->swap_in = vm_stat.pageins;
vmstat->swap_out = vm_stat.pageouts;
vmstat->memory_free = (page_size / 1024) * vm_stat.free_count;
}
ret = stress_bsd_getsysctl("vm.swapusage", &xsu, sizeof(xsu));
if (ret >= 0) {
vmstat->swap_total = xsu.xsu_total;
vmstat->swap_used = xsu.xsu_used;
vmstat->swap_free = xsu.xsu_avail;
}
vmstat->user_time = 0;
vmstat->system_time= 0;
vmstat->idle_time = 0;
vmstat->wait_time = 0;
vmstat->stolen_time = 0;
#if defined(HAVE_MACH_MACH_H) && \
defined(PROCESSOR_CPU_LOAD_INFO) && \
defined(CPU_STATE_USER) && \
defined(CPU_STATE_SYSTEM) && \
defined(CPU_STATE_IDLE)
{
natural_t pcount, pi_array_count;
processor_info_array_t pi_array;
ret = host_processor_info(host, PROCESSOR_CPU_LOAD_INFO, &pcount, &pi_array, &pi_array_count);
if (ret >= 0) {
natural_t i;
for (i = 0; i < pi_array_count; i++) {
integer_t *cpu_ticks = &pi_array[i * CPU_STATE_MAX];
vmstat->user_time += cpu_ticks[CPU_STATE_USER];
vmstat->system_time += cpu_ticks[CPU_STATE_SYSTEM];
vmstat->idle_time += cpu_ticks[CPU_STATE_IDLE];
}
}
}
#endif
#if defined(HAVE_SYS_SYSCTL_H) && \
defined(CTL_KERN) && \
defined(KERN_PROC) && \
defined(KERN_PROC_ALL) && \
defined(SRUN)
{
size_t length;
static const int name[] = { CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0 };
vmstat->procs_running = 0;
vmstat->procs_blocked = 0;
for (;;) {
struct kinfo_proc * result;
size_t i, n;
ret = sysctl((int *)name, (sizeof(name)/sizeof(*name))-1, NULL,
&length, NULL, 0);
if (ret < 0)
break;
result = malloc(length);
if (!result)
break;
ret = sysctl((int *)name, (sizeof(name)/sizeof(*name))-1, result,
&length, NULL, 0);
if (ret < 0) {
free(result);
break;
}
n = length / sizeof(struct kinfo_proc);
for (i = 0; i < n; i++) {
if (result[i].kp_proc.p_flag & P_SYSTEM)
continue;
switch (result[i].kp_proc.p_stat) {
case SRUN:
vmstat->procs_running++;
break;
default:
vmstat->procs_blocked++;
break;
}
}
free(result);
if (ret == 0)
break;
}
}
#endif
}
#else
/*
* stress_read_vmstat()
* read vmstat statistics, no-op
*/
static void stress_read_vmstat(stress_vmstat_t *vmstat)
{
(void)vmstat;
}
#endif
#define STRESS_VMSTAT_COPY(field) vmstat->field = (vmstat_current.field)
#define STRESS_VMSTAT_DELTA(field) \
vmstat->field = ((vmstat_current.field > vmstat_prev.field) ? \
(vmstat_current.field - vmstat_prev.field) : 0)
/*
* stress_get_vmstat()
* collect vmstat data, zero for initial read
*/
static void stress_get_vmstat(stress_vmstat_t *vmstat)
{
static stress_vmstat_t vmstat_prev;
stress_vmstat_t vmstat_current;
(void)memset(&vmstat_current, 0, sizeof(vmstat_current));
(void)memset(vmstat, 0, sizeof(*vmstat));
stress_read_vmstat(&vmstat_current);
STRESS_VMSTAT_COPY(procs_running);
STRESS_VMSTAT_COPY(procs_blocked);
STRESS_VMSTAT_COPY(swap_total);
STRESS_VMSTAT_COPY(swap_used);
STRESS_VMSTAT_COPY(swap_free);
STRESS_VMSTAT_COPY(memory_free);
STRESS_VMSTAT_COPY(memory_buff);
STRESS_VMSTAT_COPY(memory_cached);
STRESS_VMSTAT_COPY(memory_reclaimable);
STRESS_VMSTAT_DELTA(swap_in);
STRESS_VMSTAT_DELTA(swap_out);
STRESS_VMSTAT_DELTA(block_in);
STRESS_VMSTAT_DELTA(block_out);
STRESS_VMSTAT_DELTA(interrupt);
STRESS_VMSTAT_DELTA(context_switch);
STRESS_VMSTAT_DELTA(user_time);
STRESS_VMSTAT_DELTA(system_time);
STRESS_VMSTAT_DELTA(idle_time);
STRESS_VMSTAT_DELTA(wait_time);
STRESS_VMSTAT_DELTA(stolen_time);
(void)memcpy(&vmstat_prev, &vmstat_current, sizeof(vmstat_prev));
}
#if defined(__linux__)
/*
* stress_get_tz_info()
* get temperature in degrees C from a thermal zone
*/
static double stress_get_tz_info(stress_tz_info_t *tz_info)
{
double temp = 0.0;
FILE *fp;
char path[PATH_MAX];
(void)snprintf(path, sizeof(path),
"/sys/class/thermal/%s/temp",
tz_info->path);
if ((fp = fopen(path, "r")) != NULL) {
if (fscanf(fp, "%lf", &temp) == 1)
temp /= 1000.0;
(void)fclose(fp);
}
return temp;
}
#endif
static void stress_zero_cpu_ghz(
double *avg_ghz,
double *min_ghz,
double *max_ghz)
{
*avg_ghz = 0.0;
*min_ghz = 0.0;
*max_ghz = 0.0;
}
#if defined(__linux__)
/*
* stress_get_cpu_ghz()
* get CPU frequencies in GHz
*/
static void stress_get_cpu_ghz(
double *avg_ghz,
double *min_ghz,
double *max_ghz)
{
struct dirent **cpu_list = NULL;
int i, n_cpus, n = 0;
double total_freq = 0.0;
*min_ghz = DBL_MAX;
*max_ghz = 0.0;
n_cpus = scandir("/sys/devices/system/cpu", &cpu_list, NULL, alphasort);
for (i = 0; i < n_cpus; i++) {
const char *name = cpu_list[i]->d_name;
if (!strncmp(name, "cpu", 3) && isdigit(name[3])) {
char path[PATH_MAX];
double freq;
FILE *fp;
(void)snprintf(path, sizeof(path),
"/sys/devices/system/cpu/%s/cpufreq/scaling_cur_freq",
name);
if ((fp = fopen(path, "r")) != NULL) {
if (fscanf(fp, "%lf", &freq) == 1) {
if (freq >= 0.0) {
total_freq += freq;
if (*min_ghz > freq)
*min_ghz = freq;
if (*max_ghz < freq)
*max_ghz = freq;
n++;
}
}
(void)fclose(fp);
}
}
free(cpu_list[i]);
}
if (n_cpus > -1)
free(cpu_list);
if (n == 0) {
stress_zero_cpu_ghz(avg_ghz, min_ghz, max_ghz);
} else {
*avg_ghz = (total_freq / n) * ONE_MILLIONTH;
*min_ghz *= ONE_MILLIONTH;
*max_ghz *= ONE_MILLIONTH;
}
}
#elif defined(__FreeBSD__) || \
defined(__APPLE__)
static void stress_get_cpu_ghz(
double *avg_ghz,
double *min_ghz,
double *max_ghz)
{
const int32_t ncpus = stress_get_processors_configured();
int32_t i;
double total_freq = 0.0;
int n = 0;
*min_ghz = DBL_MAX;
*max_ghz = 0.0;
for (i = 0; i < ncpus; i++) {
double freq;
#if defined(__FreeBSD__)
{
char name[32];
(void)snprintf(name, sizeof(name), "dev.cpu.%" PRIi32 ".freq", i);
freq = (double)stress_bsd_getsysctl_uint(name) * ONE_THOUSANDTH;
}
#endif
#if defined(__APPLE__)
freq = (double)stress_bsd_getsysctl_uint64("hw.cpufrequency") * ONE_BILLIONTH;
#endif
if (freq >= 0.0) {
total_freq += freq;
if (*min_ghz > freq)
*min_ghz = freq;
if (*max_ghz < freq)
*max_ghz = freq;
n++;
}
}
if (n == 0) {
stress_zero_cpu_ghz(avg_ghz, min_ghz, max_ghz);
} else {
*avg_ghz = (total_freq / n);
}
}
#else
static void stress_get_cpu_ghz(
double *avg_ghz,
double *min_ghz,
double *max_ghz)
{
stress_zero_cpu_ghz(avg_ghz, min_ghz, max_ghz);
}
#endif
/*
* stress_vmstat_start()
* start vmstat statistics (1 per second)
*/
void stress_vmstat_start(void)
{
stress_vmstat_t vmstat;
size_t tz_num = 0;
stress_tz_info_t *tz_info;
int32_t vmstat_sleep, thermalstat_sleep, iostat_sleep;
double t1, t2;
#if defined(HAVE_SYS_SYSMACROS_H) && \
defined(__linux__)
char iostat_name[PATH_MAX];