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SystemInfo.cc
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/**
* Copyright (C) 2007 Luke Lu (Zvents, Inc.)
*
* This file is part of Hypertable.
*
* Hypertable 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 any later version.
*
* Hypertable 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 "Common/Compat.h"
#include "Common/Logger.h"
#include "Common/SystemInfo.h"
#include "Common/Stopwatch.h"
#include "Common/Mutex.h"
extern "C" {
#include <poll.h>
#include <curses.h>
#include <term.h>
#include <sigar.h>
#include <sigar_format.h>
}
#define HT_FIELD_NOTIMPL(_field_) (_field_ == (uint64_t)-1)
using namespace Hypertable;
namespace {
RecMutex _mutex;
// for computing cpu percentages
RecMutex _cpu_mutex;
sigar_cpu_t _prev_cpu, *_prev_cpup = NULL;
// default pause (in ms) to calcuate rates
const int DEFAULT_PAUSE = 500;
// for unit conversion to/from MB/GB
const double KiB = 1024.;
const double MiB = KiB * 1024;
const double GiB = MiB * 1024;
// for computing rx/tx rate
RecMutex _net_mutex;
sigar_net_interface_stat_t _prev_net_stat, *_prev_net_statp = NULL;
Stopwatch _net_stat_stopwatch;
const int DEFAULT_NET_STAT_FLAGS =
SIGAR_NETCONN_CLIENT|SIGAR_NETCONN_SERVER|SIGAR_NETCONN_TCP;
// for computing disk io rate
RecMutex _disk_mutex;
sigar_disk_usage_t _prev_disk_stat, *_prev_disk_statp = NULL;
Stopwatch _disk_stat_stopwatch;
// info/stat singletons
CpuInfo _cpu_info, *_cpu_infop = NULL;
CpuStat _cpu_stat;
MemStat _mem_stat;
DiskStat _disk_stat;
OsInfo _os_info, *_os_infop = NULL;
SwapStat _swap_stat;
NetInfo _net_info, *_net_infop = NULL;
NetStat _net_stat;
ProcInfo _proc_info, *_proc_infop = NULL;
ProcStat _proc_stat;
FsStat _fs_stat;
TermInfo _term_info, *_term_infop = NULL;
// sigar_t singleton to take advantage of the cache
sigar_t *_sigar = NULL;
sigar_t *sigar() {
if (!_sigar)
HT_ASSERT(sigar_open(&_sigar) == SIGAR_OK);
return _sigar;
}
// we don't expect filesystem changes while the process is running
sigar_file_system_list_t _fs_list, *_fs_listp = NULL;
sigar_file_system_list_t &fs_list() {
if (!_fs_listp) {
HT_ASSERT(sigar_file_system_list_get(sigar(), &_fs_list) == SIGAR_OK);
_fs_listp = &_fs_list;
}
return _fs_list;
}
bool compute_disk_usage(const char *prefix, sigar_disk_usage_t &u) {
sigar_disk_usage_t t;
sigar_file_system_t *fs = fs_list().data, *fs_end = fs + fs_list().number;
size_t prefix_len = strlen(prefix);
u.reads = u.writes = u.write_bytes = u.read_bytes = 0;
size_t num_found = 0;
for (; fs < fs_end; ++fs) {
if (strncmp(prefix, fs->dir_name, prefix_len) == 0
&& sigar_disk_usage_get(sigar(), fs->dir_name, &t) == SIGAR_OK) {
u.reads += t.reads;
u.writes += t.writes;
u.read_bytes += t.read_bytes;
u.write_bytes += t.write_bytes;
++num_found;
}
}
if (num_found > 0)
return true;
return false;
}
bool compute_fs_usage(const char *prefix, sigar_file_system_usage_t &u) {
sigar_file_system_usage_t t;
sigar_file_system_t *fs = fs_list().data, *fs_end = fs + fs_list().number;
size_t prefix_len = strlen(prefix);
u.use_percent = 0.;
u.total = u.free = u.used = u.avail = u.files = u.free_files = 0;
size_t num_found = 0;
for (; fs < fs_end; ++fs) {
if (strncmp(prefix, fs->dir_name, prefix_len) == 0
&& sigar_file_system_usage_get(sigar(), fs->dir_name, &t) == SIGAR_OK) {
u.use_percent += t.use_percent * t.total; // for weighted mean;
u.total += t.total;
u.free += t.free;
u.used += t.used;
u.avail += t.avail;
u.files += t.files;
u.free_files += t.free_files;
++num_found;
}
}
if (num_found > 0) {
u.use_percent /= u.total;
return true;
}
return false;
}
} // local namespace
namespace Hypertable {
const CpuInfo &System::cpu_info() {
ScopedRecLock lock(_mutex);
if (!_cpu_infop)
_cpu_infop = &_cpu_info.init();
return _cpu_info;
}
const CpuStat &System::cpu_stat() {
return _cpu_stat.refresh();
}
const MemStat &System::mem_stat() {
return _mem_stat.refresh();
}
const DiskStat &System::disk_stat() {
return _disk_stat.refresh();
}
const OsInfo &System::os_info() {
ScopedRecLock lock(_mutex);
if (!_os_infop)
_os_infop = &_os_info.init();
return _os_info;
}
const SwapStat &System::swap_stat() {
return _swap_stat.refresh();
}
const NetInfo &System::net_info() {
ScopedRecLock lock(_mutex);
if (!_net_infop)
_net_infop = &_net_info.init();
return _net_info;
}
const NetStat &System::net_stat() {
return _net_stat.refresh();
}
const ProcInfo &System::proc_info() {
ScopedRecLock lock(_mutex);
if (!_proc_infop)
_proc_infop = &_proc_info.init();
return _proc_info;
}
const ProcStat &System::proc_stat() {
return _proc_stat.refresh();
}
const FsStat &System::fs_stat() {
return _fs_stat.refresh();
}
const TermInfo &System::term_info() {
ScopedRecLock lock(_mutex);
if (!_term_infop)
_term_infop = &_term_info.init();
return _term_info;
}
CpuInfo &CpuInfo::init() {
ScopedRecLock lock(_mutex);
sigar_cpu_info_list_t l;
HT_ASSERT(sigar_cpu_info_list_get(sigar(), &l) == SIGAR_OK);
sigar_cpu_info_t &s = l.data[0];
vendor = s.vendor;
model = s.model;
mhz = s.mhz;
cache_size = s.cache_size;
total_sockets = s.total_sockets;
total_cores = s.total_cores;
cores_per_socket = s.cores_per_socket;
sigar_cpu_info_list_destroy(sigar(), &l);
return *this;
}
CpuStat &CpuStat::refresh() {
ScopedRecLock cpu_lock(_cpu_mutex);
bool need_pause = false;
{
ScopedRecLock lock(_mutex); // needed for sigar object
if (!_prev_cpup) {
HT_ASSERT(sigar_cpu_get(sigar(), &_prev_cpu) == SIGAR_OK);
_prev_cpup = &_prev_cpu;
need_pause = true;
}
}
if (need_pause)
poll(0, 0, DEFAULT_PAUSE);
{
ScopedRecLock lock(_mutex);
sigar_cpu_t curr;
HT_ASSERT(sigar_cpu_get(sigar(), &curr) == SIGAR_OK);
sigar_cpu_perc_t p;
HT_ASSERT(sigar_cpu_perc_calculate(&_prev_cpu, &curr, &p) == SIGAR_OK);
user = p.user * 100.;
sys = p.sys * 100.;
nice = p.nice * 100.;
idle = p.idle * 100.;
wait = p.wait * 100.;
irq = p.irq * 100.;
soft_irq = p.soft_irq * 100.;
stolen = p.stolen * 100.;
total = p.combined * 100.;
_prev_cpu = curr;
}
return *this;
}
MemStat &MemStat::refresh() {
ScopedRecLock lock(_mutex);
sigar_mem_t m;
HT_ASSERT(sigar_mem_get(sigar(), &m) == SIGAR_OK);
ram = m.ram;
total = m.total / MiB;
used = m.used / MiB;
free = m.free / MiB;
actual_used = m.actual_used / MiB;
actual_free = m.actual_free / MiB;
return *this;
}
DiskStat &DiskStat::refresh(const char *dir_prefix) {
ScopedRecLock disk_lock(_disk_mutex);
bool need_pause = false;
{
ScopedRecLock lock(_mutex);
if ((prefix != dir_prefix || !_prev_disk_statp)
&& compute_disk_usage(dir_prefix, _prev_disk_stat)) {
HT_DEBUGF("prev_disk_stat: reads=%llu, reads=%llu, read_bytes=%llu "
"write_bytes=%llu", (Llu)_prev_disk_stat.reads,
(Llu)_prev_disk_stat.writes, (Llu)_prev_disk_stat.read_bytes,
(Llu)_prev_disk_stat.write_bytes);
_prev_disk_statp = &_prev_disk_stat;
prefix = dir_prefix;
need_pause = true;
}
prefix = dir_prefix;
}
if (need_pause)
poll(0, 0, DEFAULT_PAUSE);
{
ScopedRecLock lock(_mutex);
if (_prev_disk_statp) {
sigar_disk_usage_t s;
if (compute_disk_usage(dir_prefix, s)) {
HT_DEBUGF("curr_disk_stat: reads=%llu, reads=%llu, read_bytes=%llu "
"write_bytes=%llu", (Llu)s.reads, (Llu)s.writes,
(Llu)s.read_bytes, (Llu)s.write_bytes);
_disk_stat_stopwatch.stop();
double elapsed = _disk_stat_stopwatch.elapsed();
reads_rate = (s.reads - _prev_disk_stat.reads) / elapsed;
writes_rate = (s.writes - _prev_disk_stat.writes) / elapsed;
read_rate =
(s.read_bytes - _prev_disk_stat.read_bytes) / elapsed / MiB;
write_rate =
(s.write_bytes - _prev_disk_stat.write_bytes) / elapsed / MiB;
_prev_disk_stat = s;
_disk_stat_stopwatch.start();
}
}
}
return *this;
}
SwapStat &SwapStat::refresh() {
ScopedRecLock lock(_mutex);
sigar_swap_t s;
HT_ASSERT(sigar_swap_get(sigar(), &s) == SIGAR_OK);
total = s.total / MiB;
used = s.used / MiB;
free = s.free / MiB;
page_in = s.page_in;
page_out = s.page_out;
return *this;
}
OsInfo &OsInfo::init() {
ScopedRecLock lock(_mutex);
sigar_sys_info_t s;
HT_ASSERT(sigar_sys_info_get(sigar(), &s) == SIGAR_OK);
name = s.name;
version = s.version;
arch = s.arch;
machine = s.machine;
description = s.description;
patch_level = s.patch_level;
vendor = s.vendor;
vendor_version = s.vendor_version;
vendor_name = s.vendor_name;
return *this;
}
NetInfo &NetInfo::init() {
ScopedRecLock lock(_mutex);
sigar_net_interface_config_t ifc;
sigar_net_info_t ni;
char addrbuf[SIGAR_INET6_ADDRSTRLEN];
HT_ASSERT(sigar_net_info_get(sigar(), &ni) == SIGAR_OK);
host_name = ni.host_name;
default_gw = ni.default_gateway;
if (sigar_net_interface_config_primary_get(sigar(), &ifc) == SIGAR_OK) {
primary_if = ifc.name;
HT_ASSERT(sigar_net_address_to_string(sigar(), &ifc.address, addrbuf)
== SIGAR_OK);
primary_addr = addrbuf;
}
if (primary_addr.empty())
primary_addr = "127.0.0.1";
return *this;
}
NetStat &NetStat::refresh() {
ScopedRecLock net_lock(_net_mutex);
{
ScopedRecLock lock(_mutex);
sigar_net_stat_t s;
if (sigar_net_stat_get(sigar(), &s, DEFAULT_NET_STAT_FLAGS) == SIGAR_OK) {
tcp_established = s.tcp_states[SIGAR_TCP_ESTABLISHED];
tcp_listen = s.tcp_states[SIGAR_TCP_LISTEN];
tcp_time_wait = s.tcp_states[SIGAR_TCP_TIME_WAIT];
tcp_close_wait = s.tcp_states[SIGAR_TCP_CLOSE_WAIT];
tcp_idle = s.tcp_states[SIGAR_TCP_IDLE];
}
else {
tcp_established = tcp_listen = tcp_time_wait = tcp_close_wait =
tcp_idle = 0;
}
}
bool need_pause = false;
const char *ifname = System::net_info().primary_if.c_str();
{
ScopedRecLock lock(_mutex);
if (!_prev_net_statp) {
if (sigar_net_interface_stat_get(sigar(), ifname, &_prev_net_stat)
== SIGAR_OK) {
_prev_net_statp = &_prev_net_stat;
_net_stat_stopwatch.start();
HT_DEBUGF("prev_net_stat: rx_bytes=%llu, tx_bytes=%llu",
(Llu)_prev_net_stat.rx_bytes, (Llu)_prev_net_stat.tx_bytes);
need_pause = true;
}
else {
rx_rate = tx_rate = 0;
}
}
}
if (need_pause)
poll(0, 0, DEFAULT_PAUSE);
{
ScopedRecLock lock(_mutex);
if (_prev_net_statp) {
sigar_net_interface_stat_t curr;
if (sigar_net_interface_stat_get(sigar(), ifname, &curr) == SIGAR_OK) {
_net_stat_stopwatch.stop();
double elapsed = _net_stat_stopwatch.elapsed();
HT_DEBUGF("curr_net_stat: rx_bytes=%llu, tx_bytes=%llu",
(Llu)curr.rx_bytes, (Llu)curr.tx_bytes);
rx_rate = (curr.rx_bytes - _prev_net_stat.rx_bytes) / elapsed / KiB;
tx_rate = (curr.tx_bytes - _prev_net_stat.tx_bytes) / elapsed / KiB;
_prev_net_stat = curr;
_net_stat_stopwatch.start();
}
}
}
return *this;
}
ProcInfo &ProcInfo::init() {
ScopedRecLock lock(_mutex);
sigar_proc_exe_t exeinfo;
sigar_proc_args_t arginfo;
sigar_proc_cred_name_t name;
pid = sigar_pid_get(sigar());
HT_ASSERT(sigar_proc_exe_get(sigar(), pid, &exeinfo) == SIGAR_OK);
HT_ASSERT(sigar_proc_args_get(sigar(), pid, &arginfo) == SIGAR_OK);
HT_ASSERT(sigar_proc_cred_name_get(sigar(), pid, &name) == SIGAR_OK);
user = name.user;
exe = exeinfo.name;
cwd = exeinfo.cwd;
root = exeinfo.root;
for (size_t i = 0; i < arginfo.number; ++i)
args.push_back(arginfo.data[i]);
sigar_proc_args_destroy(sigar(), &arginfo);
return *this;
}
ProcStat &ProcStat::refresh() {
ScopedRecLock lock(_mutex);
sigar_proc_cpu_t c;
sigar_proc_mem_t m;
sigar_pid_t pid = sigar_pid_get(sigar());
HT_ASSERT(sigar_proc_cpu_get(sigar(), pid, &c) == SIGAR_OK);
HT_ASSERT(sigar_proc_mem_get(sigar(), pid, &m) == SIGAR_OK);
cpu_user = c.user;
cpu_sys = c.sys;
cpu_total = c.total;
cpu_pct = c.percent * 100.;
vm_size = m.size / MiB;
vm_resident = m.resident / MiB;
vm_share = HT_FIELD_NOTIMPL(m.share) ? 0 : m.share / MiB;
minor_faults = HT_FIELD_NOTIMPL(m.minor_faults) ? 0 : m.minor_faults;
major_faults = HT_FIELD_NOTIMPL(m.major_faults) ? 0 : m.major_faults;
page_faults = HT_FIELD_NOTIMPL(m.page_faults) ? 0 : m.page_faults;;
return *this;
}
FsStat &FsStat::refresh(const char *dir_prefix) {
ScopedRecLock lock(_mutex);
sigar_file_system_usage_t u;
prefix = dir_prefix;
if (compute_fs_usage(dir_prefix, u)) {
use_pct = u.use_percent * 100.;
total = u.total / MiB; // u.total already in KB
free = u.free / MiB;
used = u.used / MiB;
avail = u.avail / MiB;
files = u.files;
free_files = u.free_files;
}
return *this;
}
TermInfo &TermInfo::init() {
ScopedRecLock lock(_mutex);
int err;
if (setupterm(0, 1, &err) != ERR) {
term = getenv("TERM");
num_lines = lines;
num_cols = columns;
}
else {
term = "dumb";
num_lines = 24;
num_cols = 80;
}
return *this;
}
const char *system_info_lib_version() {
sigar_version_t *v = sigar_version_get();
return v->description;
}
std::ostream &system_info_lib_version(std::ostream &out) {
sigar_version_t *v = sigar_version_get();
out <<"{SigarVersion: build_date='"<< v->build_date <<"' scm_revision='"
<< v->scm_revision <<"'\n version='"<< v->version <<"' archname='"
<< v->archname <<"'\n archlib='"<< v->archlib <<"' binname='"
<< v->binname <<"'\n description='"<< v->description <<"'\n major="
<< v->major <<" minor="<< v->minor <<" maint="<< v->maint <<" build="
<< v->build <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const CpuInfo &i) {
out <<"{CpuInfo: vendor='"<< i.vendor <<"' model='"<< i.model
<<"' mhz="<< i.mhz <<" cache_size="<< i.cache_size
<<"\n total_sockets="<< i.total_sockets <<" total_cores="<< i.total_cores
<<" cores_per_socket="<< i.cores_per_socket <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const CpuStat &s) {
out <<"{CpuStat: user="<< s.user <<" sys="<< s.sys <<" nice="<< s.nice
<<" idle="<< s.idle <<" wait="<< s.wait <<"\n irq="<< s.irq
<<" soft_irq="<< s.soft_irq <<" stolen="<< s.stolen
<<" total="<< s.total <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const MemStat &s) {
out <<"{MemStat: ram="<< s.ram <<" total="<< s.total <<" used="<< s.used
<<" free="<< s.free <<"\n actual_used="<< s.actual_used
<<" actual_free="<< s.actual_free <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const DiskStat &s) {
out <<"{DiskStat: prefix='"<< s.prefix <<"' reads_rate="<< s.reads_rate
<<" writes_rate="<< s.writes_rate <<"\n read_rate=" << s.read_rate
<<" write_rate="<< s.write_rate <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const OsInfo &i) {
out <<"{OsInfo: name="<< i.name <<" version="<< i.version <<" arch="<< i.arch
<<" machine="<< i.machine <<"\n description='"<< i.description
<<"' patch_level="<< i.patch_level <<"\n vendor="<< i.vendor
<<" vendor_version="<< i.vendor_version <<" vendor_name="<< i.vendor_name
<<" code_name="<< i.code_name <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const SwapStat &s) {
out <<"{SwapStat: total="<< s.total <<" used="<< s.used <<" free="<< s.free
<<" page_in="<< s.page_in <<" page_out="<< s.page_out <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const NetInfo &i) {
out <<"{NetInfo: host_name="<< i.host_name <<" primary_if="
<< i.primary_if <<"\n primary_addr="<< i.primary_addr
<<" default_gw="<< i.default_gw <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const NetStat &s) {
out <<"{NetStat: rx_rate="<< s.rx_rate <<" tx_rate="<< s.tx_rate
<<" tcp_established="<< s.tcp_established <<" tcp_listen="
<< s.tcp_listen <<"\n tcp_time_wait="<< s.tcp_time_wait
<<" tcp_close_wait="<< s.tcp_close_wait <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const ProcInfo &i) {
out <<"{ProcInfo: pid="<< i.pid <<" user="<< i.user <<" exe='"<< i.exe
<<"'\n cwd='"<< i.cwd <<"' root='"<< i.root <<"'\n args=[";
foreach(const String &arg, i.args)
out <<"'"<< arg <<"', ";
out <<"]}";
return out;
}
std::ostream &operator<<(std::ostream &out, const ProcStat &s) {
out <<"{ProcStat: cpu_user="<< s.cpu_user <<" cpu_sys="<< s.cpu_sys
<<" cpu_total="<< s.cpu_total <<" cpu_pct="<< s.cpu_pct
<<"\n vm_size="<< s.vm_size <<" vm_resident="<< s.vm_resident
<<" vm_share="<< s.vm_share <<"\n major_faults="<< s.major_faults
<<" minor_faults="<< s.minor_faults <<" page_faults="<< s.page_faults
<<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const FsStat &s) {
out <<"{FsStat: prefix='"<< s.prefix <<"' total="<< s.total
<<" free="<< s.free <<" used="<< s.used <<"\n avail="<< s.avail
<<" use_pct="<< s.use_pct <<'}';
return out;
}
std::ostream &operator<<(std::ostream &out, const TermInfo &i) {
out <<"{TermInfo: term='"<< i.term <<"' num_lines="<< i.num_lines
<<" num_cols="<< i.num_cols <<'}';
return out;
}
} // namespace Hypertable