266 lines
9.2 KiB
Go
266 lines
9.2 KiB
Go
// +build windows
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package cpu
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import (
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"context"
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"fmt"
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"strings"
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"unsafe"
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"github.com/yusufpapurcu/wmi"
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"github.com/shirou/gopsutil/internal/common"
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"golang.org/x/sys/windows"
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)
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var (
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procGetActiveProcessorCount = common.Modkernel32.NewProc("GetActiveProcessorCount")
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procGetNativeSystemInfo = common.Modkernel32.NewProc("GetNativeSystemInfo")
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)
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type Win32_Processor struct {
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Win32_ProcessorWithoutLoadPct
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LoadPercentage *uint16
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}
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// LoadPercentage takes a linearly more time as the number of sockets increases.
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// For vSphere by default corespersocket = 1, meaning for a 40 vCPU VM Get Processor Info
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// could take more than half a minute.
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type Win32_ProcessorWithoutLoadPct struct {
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Family uint16
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Manufacturer string
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Name string
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NumberOfLogicalProcessors uint32
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NumberOfCores uint32
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ProcessorID *string
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Stepping *string
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MaxClockSpeed uint32
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}
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// SYSTEM_PROCESSOR_PERFORMANCE_INFORMATION
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// defined in windows api doc with the following
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// https://docs.microsoft.com/en-us/windows/desktop/api/winternl/nf-winternl-ntquerysysteminformation#system_processor_performance_information
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// additional fields documented here
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// https://www.geoffchappell.com/studies/windows/km/ntoskrnl/api/ex/sysinfo/processor_performance.htm
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type win32_SystemProcessorPerformanceInformation struct {
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IdleTime int64 // idle time in 100ns (this is not a filetime).
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KernelTime int64 // kernel time in 100ns. kernel time includes idle time. (this is not a filetime).
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UserTime int64 // usertime in 100ns (this is not a filetime).
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DpcTime int64 // dpc time in 100ns (this is not a filetime).
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InterruptTime int64 // interrupt time in 100ns
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InterruptCount uint32
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}
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// Win32_PerfFormattedData_PerfOS_System struct to have count of processes and processor queue length
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type Win32_PerfFormattedData_PerfOS_System struct {
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Processes uint32
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ProcessorQueueLength uint32
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}
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const (
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ClocksPerSec = 10000000.0
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// systemProcessorPerformanceInformationClass information class to query with NTQuerySystemInformation
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// https://processhacker.sourceforge.io/doc/ntexapi_8h.html#ad5d815b48e8f4da1ef2eb7a2f18a54e0
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win32_SystemProcessorPerformanceInformationClass = 8
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// size of systemProcessorPerformanceInfoSize in memory
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win32_SystemProcessorPerformanceInfoSize = uint32(unsafe.Sizeof(win32_SystemProcessorPerformanceInformation{}))
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)
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// Times returns times stat per cpu and combined for all CPUs
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func Times(percpu bool) ([]TimesStat, error) {
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return TimesWithContext(context.Background(), percpu)
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}
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func TimesWithContext(ctx context.Context, percpu bool) ([]TimesStat, error) {
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if percpu {
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return perCPUTimes()
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}
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var ret []TimesStat
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var lpIdleTime common.FILETIME
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var lpKernelTime common.FILETIME
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var lpUserTime common.FILETIME
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r, _, _ := common.ProcGetSystemTimes.Call(
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uintptr(unsafe.Pointer(&lpIdleTime)),
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uintptr(unsafe.Pointer(&lpKernelTime)),
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uintptr(unsafe.Pointer(&lpUserTime)))
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if r == 0 {
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return ret, windows.GetLastError()
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}
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LOT := float64(0.0000001)
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HIT := (LOT * 4294967296.0)
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idle := ((HIT * float64(lpIdleTime.DwHighDateTime)) + (LOT * float64(lpIdleTime.DwLowDateTime)))
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user := ((HIT * float64(lpUserTime.DwHighDateTime)) + (LOT * float64(lpUserTime.DwLowDateTime)))
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kernel := ((HIT * float64(lpKernelTime.DwHighDateTime)) + (LOT * float64(lpKernelTime.DwLowDateTime)))
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system := (kernel - idle)
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ret = append(ret, TimesStat{
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CPU: "cpu-total",
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Idle: float64(idle),
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User: float64(user),
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System: float64(system),
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})
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return ret, nil
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}
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func Info() ([]InfoStat, error) {
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return InfoWithContext(context.Background())
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}
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func InfoWithContext(ctx context.Context) ([]InfoStat, error) {
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var ret []InfoStat
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var dst []Win32_ProcessorWithoutLoadPct
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q := wmi.CreateQuery(&dst, "")
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q = strings.ReplaceAll(q, "Win32_ProcessorWithoutLoadPct", "Win32_Processor")
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if err := common.WMIQueryWithContext(ctx, q, &dst); err != nil {
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return ret, err
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}
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var procID string
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for i, l := range dst {
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procID = ""
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if l.ProcessorID != nil {
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procID = *l.ProcessorID
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}
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cpu := InfoStat{
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CPU: int32(i),
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Family: fmt.Sprintf("%d", l.Family),
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VendorID: l.Manufacturer,
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ModelName: l.Name,
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Cores: int32(l.NumberOfLogicalProcessors),
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PhysicalID: procID,
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Mhz: float64(l.MaxClockSpeed),
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Flags: []string{},
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}
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ret = append(ret, cpu)
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}
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return ret, nil
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}
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// ProcInfo returns processes count and processor queue length in the system.
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// There is a single queue for processor even on multiprocessors systems.
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func ProcInfo() ([]Win32_PerfFormattedData_PerfOS_System, error) {
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return ProcInfoWithContext(context.Background())
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}
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func ProcInfoWithContext(ctx context.Context) ([]Win32_PerfFormattedData_PerfOS_System, error) {
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var ret []Win32_PerfFormattedData_PerfOS_System
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q := wmi.CreateQuery(&ret, "")
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err := common.WMIQueryWithContext(ctx, q, &ret)
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if err != nil {
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return []Win32_PerfFormattedData_PerfOS_System{}, err
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}
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return ret, err
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}
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// perCPUTimes returns times stat per cpu, per core and overall for all CPUs
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func perCPUTimes() ([]TimesStat, error) {
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var ret []TimesStat
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stats, err := perfInfo()
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if err != nil {
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return nil, err
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}
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for core, v := range stats {
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c := TimesStat{
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CPU: fmt.Sprintf("cpu%d", core),
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User: float64(v.UserTime) / ClocksPerSec,
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System: float64(v.KernelTime-v.IdleTime) / ClocksPerSec,
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Idle: float64(v.IdleTime) / ClocksPerSec,
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Irq: float64(v.InterruptTime) / ClocksPerSec,
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}
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ret = append(ret, c)
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}
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return ret, nil
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}
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// makes call to Windows API function to retrieve performance information for each core
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func perfInfo() ([]win32_SystemProcessorPerformanceInformation, error) {
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// Make maxResults large for safety.
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// We can't invoke the api call with a results array that's too small.
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// If we have more than 2056 cores on a single host, then it's probably the future.
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maxBuffer := 2056
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// buffer for results from the windows proc
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resultBuffer := make([]win32_SystemProcessorPerformanceInformation, maxBuffer)
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// size of the buffer in memory
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bufferSize := uintptr(win32_SystemProcessorPerformanceInfoSize) * uintptr(maxBuffer)
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// size of the returned response
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var retSize uint32
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// Invoke windows api proc.
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// The returned err from the windows dll proc will always be non-nil even when successful.
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// See https://godoc.org/golang.org/x/sys/windows#LazyProc.Call for more information
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retCode, _, err := common.ProcNtQuerySystemInformation.Call(
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win32_SystemProcessorPerformanceInformationClass, // System Information Class -> SystemProcessorPerformanceInformation
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uintptr(unsafe.Pointer(&resultBuffer[0])), // pointer to first element in result buffer
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bufferSize, // size of the buffer in memory
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uintptr(unsafe.Pointer(&retSize)), // pointer to the size of the returned results the windows proc will set this
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)
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// check return code for errors
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if retCode != 0 {
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return nil, fmt.Errorf("call to NtQuerySystemInformation returned %d. err: %s", retCode, err.Error())
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}
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// calculate the number of returned elements based on the returned size
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numReturnedElements := retSize / win32_SystemProcessorPerformanceInfoSize
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// trim results to the number of returned elements
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resultBuffer = resultBuffer[:numReturnedElements]
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return resultBuffer, nil
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}
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// SystemInfo is an equivalent representation of SYSTEM_INFO in the Windows API.
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// https://msdn.microsoft.com/en-us/library/ms724958%28VS.85%29.aspx?f=255&MSPPError=-2147217396
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// https://github.com/elastic/go-windows/blob/bb1581babc04d5cb29a2bfa7a9ac6781c730c8dd/kernel32.go#L43
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type systemInfo struct {
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wProcessorArchitecture uint16
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wReserved uint16
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dwPageSize uint32
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lpMinimumApplicationAddress uintptr
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lpMaximumApplicationAddress uintptr
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dwActiveProcessorMask uintptr
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dwNumberOfProcessors uint32
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dwProcessorType uint32
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dwAllocationGranularity uint32
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wProcessorLevel uint16
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wProcessorRevision uint16
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}
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func CountsWithContext(ctx context.Context, logical bool) (int, error) {
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if logical {
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// https://github.com/giampaolo/psutil/blob/d01a9eaa35a8aadf6c519839e987a49d8be2d891/psutil/_psutil_windows.c#L97
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err := procGetActiveProcessorCount.Find()
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if err == nil { // Win7+
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ret, _, _ := procGetActiveProcessorCount.Call(uintptr(0xffff)) // ALL_PROCESSOR_GROUPS is 0xffff according to Rust's winapi lib https://docs.rs/winapi/*/x86_64-pc-windows-msvc/src/winapi/shared/ntdef.rs.html#120
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if ret != 0 {
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return int(ret), nil
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}
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}
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var systemInfo systemInfo
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_, _, err = procGetNativeSystemInfo.Call(uintptr(unsafe.Pointer(&systemInfo)))
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if systemInfo.dwNumberOfProcessors == 0 {
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return 0, err
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}
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return int(systemInfo.dwNumberOfProcessors), nil
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}
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// physical cores https://github.com/giampaolo/psutil/blob/d01a9eaa35a8aadf6c519839e987a49d8be2d891/psutil/_psutil_windows.c#L499
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// for the time being, try with unreliable and slow WMI call…
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var dst []Win32_ProcessorWithoutLoadPct
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q := wmi.CreateQuery(&dst, "")
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q = strings.ReplaceAll(q, "Win32_ProcessorWithoutLoadPct", "Win32_Processor")
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if err := common.WMIQueryWithContext(ctx, q, &dst); err != nil {
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return 0, err
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}
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var count uint32
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for _, d := range dst {
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count += d.NumberOfCores
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}
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return int(count), nil
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}
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