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/* Copyright 2012 10gen Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#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/scopeguard.h"
#include "processinfo.h"
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);
kvm_close(kd);
return task->ki_size / 1024 / 1024; // convert from bytes to MB
}
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);
kvm_close(kd);
return task->ki_rssize * sysconf( _SC_PAGESIZE ) / 1024 / 1024; // convert from pages to MB
}
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) << ")" << endl;
status = getSysctlByNameWithDefault("hw.machine_arch", string("unknown"), &cpuArch);
if (status != 0)
log() << "Unable to collect Machine Architecture. (errno: "
<< status << " msg: " << strerror(status) << ")" << endl;
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) << ")" << endl;
status = getSysctlByNameWithDefault("hw.ncpu", defaultNum, &numBuffer);
numCores = numBuffer;
if (status != 0)
log() << "Unable to collect Number of CPUs. (errno: "
<< status << " msg: " << strerror(status) << ")" << endl;
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() << endl;
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() << endl;
return false;
}
for (size_t i = 0; i < numPages; ++i) {
(*out)[i] = 0x1;
}
return true;
}
}
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