diff options
Diffstat (limited to 'src/mongo/util/processinfo.h')
| -rw-r--r-- | src/mongo/util/processinfo.h | 361 |
1 files changed, 191 insertions, 170 deletions
diff --git a/src/mongo/util/processinfo.h b/src/mongo/util/processinfo.h index ad0a3fbb6a7..551ed8c6629 100644 --- a/src/mongo/util/processinfo.h +++ b/src/mongo/util/processinfo.h @@ -38,184 +38,205 @@ namespace mongo { - class ProcessInfo { +class ProcessInfo { +public: + ProcessInfo(ProcessId pid = ProcessId::getCurrent()); + ~ProcessInfo(); + + /** + * @return mbytes + */ + int getVirtualMemorySize(); + + /** + * @return mbytes + */ + int getResidentSize(); + + /** + * Get the type of os (e.g. Windows, Linux, Mac OS) + */ + const std::string& getOsType() const { + return sysInfo().osType; + } + + /** + * Get the os Name (e.g. Ubuntu, Gentoo, Windows Server 2008) + */ + const std::string& getOsName() const { + return sysInfo().osName; + } + + /** + * Get the os version (e.g. 10.04, 11.3.0, 6.1 (build 7600)) + */ + const std::string& getOsVersion() const { + return sysInfo().osVersion; + } + + /** + * Get the cpu address size (e.g. 32, 36, 64) + */ + unsigned getAddrSize() const { + return sysInfo().addrSize; + } + + /** + * Get the total amount of system memory in MB + */ + unsigned long long getMemSizeMB() const { + return sysInfo().memSize / (1024 * 1024); + } + + /** + * Get the number of CPUs + */ + unsigned getNumCores() const { + return sysInfo().numCores; + } + + /** + * Get the system page size in bytes. + */ + static unsigned long long getPageSize() { + return systemInfo->pageSize; + } + + /** + * Get the CPU architecture (e.g. x86, x86_64) + */ + const std::string& getArch() const { + return sysInfo().cpuArch; + } + + /** + * Determine if NUMA is enabled (interleaved) for this process + */ + bool hasNumaEnabled() const { + return sysInfo().hasNuma; + } + + /** + * Determine if file zeroing is necessary for newly allocated data files. + */ + static bool isDataFileZeroingNeeded() { + return systemInfo->fileZeroNeeded; + } + + /** + * Determine if we need to workaround slow msync performance on Illumos/Solaris + */ + static bool preferMsyncOverFSync() { + return systemInfo->preferMsyncOverFSync; + } + + /** + * Get extra system stats + */ + void appendSystemDetails(BSONObjBuilder& details) const { + details.append(StringData("extra"), sysInfo()._extraStats.copy()); + } + + /** + * Append platform-specific data to obj + */ + void getExtraInfo(BSONObjBuilder& info); + + bool supported(); + + static bool blockCheckSupported(); + + static bool blockInMemory(const void* start); + + /** + * Returns a positive floating point number between 0.0 and 1.0 to inform MMapV1 how much it + * must remap pages to bring the system page file implementation back below a certain + * threshold. A number of 1.0 means remap everything. + */ + static double getSystemMemoryPressurePercentage(); + + /** + * @return a pointer aligned to the start of the page the provided pointer belongs to. + * + * NOTE requires blockCheckSupported() == true + */ + inline static const void* alignToStartOfPage(const void* ptr) { + return reinterpret_cast<const void*>(reinterpret_cast<unsigned long long>(ptr) & + ~(getPageSize() - 1)); + } + + /** + * Sets i-th element of 'out' to non-zero if the i-th page starting from the one containing + * 'start' is in memory. + * The 'out' vector will be resized to fit the requested number of pages. + * @return true on success, false otherwise + * + * NOTE: requires blockCheckSupported() == true + */ + static bool pagesInMemory(const void* start, size_t numPages, std::vector<char>* out); + +private: + /** + * Host and operating system info. Does not change over time. + */ + class SystemInfo { public: - ProcessInfo( ProcessId pid = ProcessId::getCurrent() ); - ~ProcessInfo(); - - /** - * @return mbytes - */ - int getVirtualMemorySize(); - - /** - * @return mbytes - */ - int getResidentSize(); - - /** - * Get the type of os (e.g. Windows, Linux, Mac OS) - */ - const std::string& getOsType() const { return sysInfo().osType; } - - /** - * Get the os Name (e.g. Ubuntu, Gentoo, Windows Server 2008) - */ - const std::string& getOsName() const { return sysInfo().osName; } - - /** - * Get the os version (e.g. 10.04, 11.3.0, 6.1 (build 7600)) - */ - const std::string& getOsVersion() const { return sysInfo().osVersion; } - - /** - * Get the cpu address size (e.g. 32, 36, 64) - */ - unsigned getAddrSize() const { return sysInfo().addrSize; } - - /** - * Get the total amount of system memory in MB - */ - unsigned long long getMemSizeMB() const { return sysInfo().memSize / (1024 * 1024); } - - /** - * Get the number of CPUs - */ - unsigned getNumCores() const { return sysInfo().numCores; } - - /** - * Get the system page size in bytes. - */ - static unsigned long long getPageSize() { return systemInfo->pageSize; } - - /** - * Get the CPU architecture (e.g. x86, x86_64) - */ - const std::string& getArch() const { return sysInfo().cpuArch; } - - /** - * Determine if NUMA is enabled (interleaved) for this process - */ - bool hasNumaEnabled() const { return sysInfo().hasNuma; } - - /** - * Determine if file zeroing is necessary for newly allocated data files. - */ - static bool isDataFileZeroingNeeded() { return systemInfo->fileZeroNeeded; } - - /** - * Determine if we need to workaround slow msync performance on Illumos/Solaris - */ - static bool preferMsyncOverFSync() { return systemInfo->preferMsyncOverFSync; } - - /** - * Get extra system stats - */ - void appendSystemDetails( BSONObjBuilder& details ) const { - details.append( StringData("extra"), sysInfo()._extraStats.copy() ); + std::string osType; + std::string osName; + std::string osVersion; + unsigned addrSize; + unsigned long long memSize; + unsigned numCores; + unsigned long long pageSize; + std::string cpuArch; + bool hasNuma; + BSONObj _extraStats; + + // This is an OS specific value, which determines whether files should be zero-filled + // at allocation time in order to avoid Microsoft KB 2731284. + // + bool fileZeroNeeded; + + // On non-Solaris (ie, Linux, Darwin, *BSD) kernels, prefer msync. + // Illumos kernels do O(N) scans in memory of the page table during msync which + // causes high CPU, Oracle Solaris 11.2 and later modified ZFS to workaround mongodb + // Oracle Solaris Bug: + // 18658199 Speed up msync() on ZFS by 90000x with this one weird trick + bool preferMsyncOverFSync; + + SystemInfo() + : addrSize(0), + memSize(0), + numCores(0), + pageSize(0), + hasNuma(false), + fileZeroNeeded(false), + preferMsyncOverFSync(true) { + // populate SystemInfo during construction + collectSystemInfo(); } - /** - * Append platform-specific data to obj - */ - void getExtraInfo( BSONObjBuilder& info ); - - bool supported(); - - static bool blockCheckSupported(); - - static bool blockInMemory(const void* start); - - /** - * Returns a positive floating point number between 0.0 and 1.0 to inform MMapV1 how much it - * must remap pages to bring the system page file implementation back below a certain - * threshold. A number of 1.0 means remap everything. - */ - static double getSystemMemoryPressurePercentage(); - - /** - * @return a pointer aligned to the start of the page the provided pointer belongs to. - * - * NOTE requires blockCheckSupported() == true - */ - inline static const void* alignToStartOfPage(const void* ptr) { - return reinterpret_cast<const void*>( - reinterpret_cast<unsigned long long>(ptr) & ~(getPageSize() - 1)); - } + private: + /** Collect host system info */ + void collectSystemInfo(); + }; - /** - * Sets i-th element of 'out' to non-zero if the i-th page starting from the one containing - * 'start' is in memory. - * The 'out' vector will be resized to fit the requested number of pages. - * @return true on success, false otherwise - * - * NOTE: requires blockCheckSupported() == true - */ - static bool pagesInMemory(const void* start, size_t numPages, std::vector<char>* out); + ProcessId _pid; + static stdx::mutex _sysInfoLock; - private: - /** - * Host and operating system info. Does not change over time. - */ - class SystemInfo { - public: - std::string osType; - std::string osName; - std::string osVersion; - unsigned addrSize; - unsigned long long memSize; - unsigned numCores; - unsigned long long pageSize; - std::string cpuArch; - bool hasNuma; - BSONObj _extraStats; - - // This is an OS specific value, which determines whether files should be zero-filled - // at allocation time in order to avoid Microsoft KB 2731284. - // - bool fileZeroNeeded; - - // On non-Solaris (ie, Linux, Darwin, *BSD) kernels, prefer msync. - // Illumos kernels do O(N) scans in memory of the page table during msync which - // causes high CPU, Oracle Solaris 11.2 and later modified ZFS to workaround mongodb - // Oracle Solaris Bug: - // 18658199 Speed up msync() on ZFS by 90000x with this one weird trick - bool preferMsyncOverFSync; - - SystemInfo() : - addrSize( 0 ), - memSize( 0 ), - numCores( 0 ), - pageSize( 0 ), - hasNuma( false ), - fileZeroNeeded (false), - preferMsyncOverFSync (true) { - // populate SystemInfo during construction - collectSystemInfo(); - } - private: - /** Collect host system info */ - void collectSystemInfo(); - }; - - ProcessId _pid; - static stdx::mutex _sysInfoLock; - - static bool checkNumaEnabled(); - - static ProcessInfo::SystemInfo* systemInfo; - - inline const SystemInfo& sysInfo() const { - return *systemInfo; - } + static bool checkNumaEnabled(); - public: - static void initializeSystemInfo(); + static ProcessInfo::SystemInfo* systemInfo; - }; + inline const SystemInfo& sysInfo() const { + return *systemInfo; + } - bool writePidFile( const std::string& path ); +public: + static void initializeSystemInfo(); +}; - void printMemInfo( const char * whereContextStr = 0 ); +bool writePidFile(const std::string& path); +void printMemInfo(const char* whereContextStr = 0); } |