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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.
*/
#define MONGO_LOG_DEFAULT_COMPONENT ::mongo::logger::LogComponent::kControl
#include <cstdlib>
#include <string>
#include <kvm.h>
#include <sys/file.h>
#include <sys/mman.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <sys/user.h>
#include <sys/vmmeter.h>
#include <unistd.h>
#include <vm/vm_param.h>
#include "mongo/util/log.h"
#include "mongo/util/scopeguard.h"
#include "processinfo.h"
using namespace std;
namespace mongo {
ProcessInfo::ProcessInfo(ProcessId pid) : _pid(pid) {}
ProcessInfo::~ProcessInfo() {}
/**
* Get a sysctl string value by name. Use string specialization by default.
*/
template <typename T>
int getSysctlByNameWithDefault(const char* sysctlName, const T& defaultValue, T* result);
template <>
int getSysctlByNameWithDefault<uintptr_t>(const char* sysctlName,
const uintptr_t& defaultValue,
uintptr_t* result) {
uintptr_t value = 0;
size_t len = sizeof(value);
if (sysctlbyname(sysctlName, &value, &len, NULL, 0) == -1) {
*result = defaultValue;
return errno;
}
if (len > sizeof(value)) {
*result = defaultValue;
return EINVAL;
}
*result = value;
return 0;
}
template <>
int getSysctlByNameWithDefault<string>(const char* sysctlName,
const string& defaultValue,
string* result) {
char value[256] = {0};
size_t len = sizeof(value);
if (sysctlbyname(sysctlName, &value, &len, NULL, 0) == -1) {
*result = defaultValue;
return errno;
}
*result = value;
return 0;
}
bool ProcessInfo::checkNumaEnabled() {
return false;
}
int ProcessInfo::getVirtualMemorySize() {
kvm_t* kd = NULL;
int cnt = 0;
char err[_POSIX2_LINE_MAX] = {0};
if ((kd = kvm_open(NULL, "/dev/null", "/dev/null", O_RDONLY, err)) == NULL)
return -1;
kinfo_proc* task = kvm_getprocs(kd, KERN_PROC_PID, _pid.toNative(), &cnt);
int vss = task->ki_size / 1024 / 1024; // convert from bytes to MB
kvm_close(kd);
return vss;
}
int ProcessInfo::getResidentSize() {
kvm_t* kd = NULL;
int cnt = 0;
char err[_POSIX2_LINE_MAX] = {0};
if ((kd = kvm_open(NULL, "/dev/null", "/dev/null", O_RDONLY, err)) == NULL)
return -1;
kinfo_proc* task = kvm_getprocs(kd, KERN_PROC_PID, _pid.toNative(), &cnt);
int rss = task->ki_rssize * sysconf(_SC_PAGESIZE) / 1024 / 1024; // convert from pages to MB
kvm_close(kd);
return rss;
}
double ProcessInfo::getSystemMemoryPressurePercentage() {
return 0.0;
}
void ProcessInfo::SystemInfo::collectSystemInfo() {
osType = "BSD";
osName = "FreeBSD";
int status = getSysctlByNameWithDefault("kern.version", string("unknown"), &osVersion);
if (status != 0)
log() << "Unable to collect OS Version. (errno: " << status << " msg: " << strerror(status)
<< ")";
status = getSysctlByNameWithDefault("hw.machine_arch", string("unknown"), &cpuArch);
if (status != 0)
log() << "Unable to collect Machine Architecture. (errno: " << status
<< " msg: " << strerror(status) << ")";
addrSize = cpuArch.find("64") != std::string::npos ? 64 : 32;
uintptr_t numBuffer;
uintptr_t defaultNum = 1;
status = getSysctlByNameWithDefault("hw.physmem", defaultNum, &numBuffer);
memSize = numBuffer;
if (status != 0)
log() << "Unable to collect Physical Memory. (errno: " << status
<< " msg: " << strerror(status) << ")";
status = getSysctlByNameWithDefault("hw.ncpu", defaultNum, &numBuffer);
numCores = numBuffer;
if (status != 0)
log() << "Unable to collect Number of CPUs. (errno: " << status
<< " msg: " << strerror(status) << ")";
pageSize = static_cast<unsigned long long>(sysconf(_SC_PAGESIZE));
hasNuma = checkNumaEnabled();
}
void ProcessInfo::getExtraInfo(BSONObjBuilder& info) {}
bool ProcessInfo::supported() {
return true;
}
bool ProcessInfo::blockCheckSupported() {
return true;
}
bool ProcessInfo::blockInMemory(const void* start) {
char x = 0;
if (mincore(alignToStartOfPage(start), getPageSize(), &x)) {
log() << "mincore failed: " << errnoWithDescription();
return 1;
}
return x & 0x1;
}
bool ProcessInfo::pagesInMemory(const void* start, size_t numPages, vector<char>* out) {
out->resize(numPages);
// int mincore(const void *addr, size_t len, char *vec);
if (mincore(alignToStartOfPage(start), numPages * getPageSize(), &(out->front()))) {
log() << "mincore failed: " << errnoWithDescription();
return false;
}
for (size_t i = 0; i < numPages; ++i) {
(*out)[i] = 0x1;
}
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;
}
} // namespace mongo
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