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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include <boost/filesystem.hpp>
#include <boost/none.hpp>
#include <boost/optional.hpp>
#include <cstdio>
#include <fstream>
#include <iostream>
#include <malloc.h>
#include <procfs.h>
#include <string>
#include <sys/lgrp_user.h>
#include <sys/mman.h>
#include <sys/systeminfo.h>
#include <sys/utsname.h>
#include <unistd.h>
#include <vector>
#include "mongo/logv2/log.h"
#include "mongo/util/file.h"
#include "mongo/util/processinfo.h"
#include "mongo/util/scopeguard.h"
#include "mongo/util/str.h"
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kControl
namespace mongo {
/**
* Read the first line from a file; return empty string on failure
*/
static std::string readLineFromFile(const char* fname) {
std::string fstr;
std::ifstream f(fname);
if (f.is_open()) {
std::getline(f, fstr);
}
return fstr;
}
struct ProcPsinfo {
ProcPsinfo() {
FILE* f = fopen("/proc/self/psinfo", "r");
if (!f) {
auto ec = lastSystemError();
msgasserted(16846,
str::stream()
<< "couldn't open \"/proc/self/psinfo\": " << errorMessage(ec));
}
size_t num = fread(&psinfo, sizeof(psinfo), 1, f);
auto ec = lastSystemError();
fclose(f);
massert(16847,
str::stream() << "couldn't read from \"/proc/self/psinfo\": " << errorMessage(ec),
num == 1);
}
psinfo_t psinfo;
};
struct ProcUsage {
ProcUsage() {
FILE* f = fopen("/proc/self/usage", "r");
if (!f) {
auto ec = lastSystemError();
msgasserted(
16848, str::stream() << "couldn't open \"/proc/self/usage\": " << errorMessage(ec));
}
size_t num = fread(&prusage, sizeof(prusage), 1, f);
auto ec = lastSystemError();
fclose(f);
massert(16849,
str::stream() << "couldn't read from \"/proc/self/usage\": " << errorMessage(ec),
num == 1);
}
prusage_t prusage;
};
ProcessInfo::ProcessInfo(ProcessId pid) : _pid(pid) {}
ProcessInfo::~ProcessInfo() {}
bool ProcessInfo::supported() {
return true;
}
// get the number of CPUs available to the scheduler
boost::optional<unsigned long> ProcessInfo::getNumCoresForProcess() {
long nprocs = sysconf(_SC_NPROCESSORS_ONLN);
if (nprocs)
return nprocs;
return boost::none;
}
int ProcessInfo::getVirtualMemorySize() {
ProcPsinfo p;
return static_cast<int>(p.psinfo.pr_size / 1024);
}
int ProcessInfo::getResidentSize() {
ProcPsinfo p;
return static_cast<int>(p.psinfo.pr_rssize / 1024);
}
void ProcessInfo::getExtraInfo(BSONObjBuilder& info) {
ProcUsage p;
info.appendNumber("page_faults", static_cast<long long>(p.prusage.pr_majf));
}
bool checkNumaEnabled() {
lgrp_cookie_t cookie = lgrp_init(LGRP_VIEW_OS);
if (cookie == LGRP_COOKIE_NONE) {
auto ec = lastSystemError();
LOGV2_WARNING(23362,
"lgrp_init failed: {errnoWithDescription}",
"errnoWithDescription"_attr = errorMessage(ec));
return false;
}
ON_BLOCK_EXIT([&] { lgrp_fini(cookie); });
int groups = lgrp_nlgrps(cookie);
if (groups == -1) {
auto ec = lastSystemError();
LOGV2_WARNING(23363,
"lgrp_nlgrps failed: {errnoWithDescription}",
"errnoWithDescription"_attr = errorMessage(ec));
return false;
}
// NUMA machines have more then 1 locality group
return groups > 1;
}
/**
* Save a BSON obj representing the host system's details
*/
void ProcessInfo::SystemInfo::collectSystemInfo() {
struct utsname unameData;
if (uname(&unameData) == -1) {
LOGV2(23356,
"Unable to collect detailed system information: {strerror_errno}",
"strerror_errno"_attr = strerror(errno));
}
char buf_64[32];
char buf_native[32];
if (sysinfo(SI_ARCHITECTURE_64, buf_64, sizeof(buf_64)) != -1 &&
sysinfo(SI_ARCHITECTURE_NATIVE, buf_native, sizeof(buf_native)) != -1) {
addrSize = str::equals(buf_64, buf_native) ? 64 : 32;
} else {
LOGV2(23357,
"Unable to determine system architecture: {strerror_errno}",
"strerror_errno"_attr = strerror(errno));
}
osType = unameData.sysname;
osName = str::ltrim(readLineFromFile("/etc/release"));
osVersion = unameData.version;
pageSize = static_cast<unsigned long long>(sysconf(_SC_PAGESIZE));
memSize = pageSize * static_cast<unsigned long long>(sysconf(_SC_PHYS_PAGES));
memLimit = memSize;
numCores = static_cast<unsigned>(sysconf(_SC_NPROCESSORS_CONF));
cpuArch = unameData.machine;
hasNuma = checkNumaEnabled();
// We prefer FSync over msync, when:
// 1. Pre-Oracle Solaris 11.2 releases
// 2. Illumos kernel releases (which is all non Oracle Solaris releases)
preferMsyncOverFSync = false;
if (str::startsWith(osName, "Oracle Solaris")) {
std::vector<std::string> versionComponents;
str::splitStringDelim(osVersion, &versionComponents, '.');
if (versionComponents.size() > 1) {
unsigned majorInt, minorInt;
Status majorStatus = NumberParser{}(versionComponents[0], &majorInt);
Status minorStatus = NumberParser{}(versionComponents[1], &minorInt);
if (!majorStatus.isOK() || !minorStatus.isOK()) {
LOGV2_WARNING(23360,
"Could not parse OS version numbers from uname: {osVersion}",
"osVersion"_attr = osVersion);
} else if ((majorInt == 11 && minorInt >= 2) || majorInt > 11) {
preferMsyncOverFSync = true;
}
} else {
LOGV2_WARNING(23361,
"Could not parse OS version string from uname: {osVersion}",
"osVersion"_attr = osVersion);
}
}
BSONObjBuilder bExtra;
bExtra.append("kernelVersion", unameData.release);
bExtra.append("pageSize", static_cast<long long>(pageSize));
bExtra.append("numPages", static_cast<int>(sysconf(_SC_PHYS_PAGES)));
bExtra.append("maxOpenFiles", static_cast<int>(sysconf(_SC_OPEN_MAX)));
_extraStats = bExtra.obj();
}
} // namespace mongo
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