open-consul/vendor/github.com/shirou/gopsutil/cpu/cpu_windows.go

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