Testing for linux cpuinfo

cmd/rpi5-health/main.go

@@ -4,14 +4,15 @@ import (
 	"log"
 	"rpi5-health/internal/cli"
 	"rpi5-health/internal/http_internal"
-	"rpi5-health/internal/system_check"
+	"rpi5-health/internal/memory"
+	"rpi5-health/internal/processor"
 )
 
 func main() {
 	srv := http_internal.NewAppServer()
 	go srv.Start()
 
-	memInfo, _ := system_check.GetRamInformation()
+	memInfo, _ := memory.GetRamInformation()
 
 	const GB = 1024 * 1024 * 1024
 
@@ -19,5 +20,13 @@ func main() {
 	log.Printf("Available memory: %.2fGB\n", float64(memInfo.AvailableMemory)/GB)
 	log.Printf("Used memory: %.2fGB\n", float64(memInfo.GetUsedMemory())/GB)
 
+	_, kernel, usage, idle := processor.GetCPUInformation().Usage()
+
+	const HOUR = 60 * 60
+
+	log.Printf("Total time spent idling: %.2f%%\n", idle)
+	log.Printf("Total time spent in kernel mode: %.2f%%\n", kernel)
+	log.Printf("Total time spent in user mode: %.2f%%\n", usage)
+
 	cli.Listen()
 }

internal/memory/linux_ram.go

@@ -1,6 +1,6 @@
 //go:build linux
 
-package system_check
+package memory
 
 import (
 	"bufio"

internal/memory/ram.go

@@ -1,4 +1,4 @@
-package system_check
+package memory
 
 type MemoryInformation struct {
 	/*

internal/memory/win_ram.go

@@ -1,29 +1,34 @@
 //go:build windows
 
-package system_check
+package memory
 
 import (
 	"log"
 	"unsafe"
 
+	"rpi5-health/internal/windows_system"
+
 	"golang.org/x/sys/windows"
 )
 
+type DWORD uint32
+type DWORDLONG uint64
+
 type memoryStatusEx struct {
 	/*
 	 * Struct for storing memory status information.
 	 *
 	 * It gets populated via syscall.
 	 */
-	dwLength                uint32
-	dwMemoryLoad            uint32
-	ullTotalPhys            uint64
-	ullAvailPhys            uint64
-	ullTotalPageFile        uint64
-	ullAvailPageFile        uint64
-	ullTotalVirtual         uint64
-	ullAvailVirtual         uint64
-	ullAvailExtendedVirtual uint64
+	dwLength                DWORD
+	dwMemoryLoad            DWORD
+	ullTotalPhys            DWORDLONG
+	ullAvailPhys            DWORDLONG
+	ullTotalPageFile        DWORDLONG
+	ullAvailPageFile        DWORDLONG
+	ullTotalVirtual         DWORDLONG
+	ullAvailVirtual         DWORDLONG
+	ullAvailExtendedVirtual DWORDLONG
 }
 
 func getWinRamInfo(procGlobalMemoryStatusEx *windows.LazyProc) MemoryInformation {
@@ -31,7 +36,7 @@ func getWinRamInfo(procGlobalMemoryStatusEx *windows.LazyProc) MemoryInformation
 
 	// * Windows requires the dwLength field to be set to the struct's size
 	// * before execution so it knows which OS struct version is being used.
-	mem.dwLength = uint32(unsafe.Sizeof(mem))
+	mem.dwLength = DWORD(unsafe.Sizeof(mem))
 
 	ret, _, err := procGlobalMemoryStatusEx.Call(uintptr(unsafe.Pointer(&mem))) // exec syscall
 
@@ -40,11 +45,11 @@ func getWinRamInfo(procGlobalMemoryStatusEx *windows.LazyProc) MemoryInformation
 	}
 
 	return MemoryInformation{
-		SystemMemory:    mem.ullTotalPhys,
-		AvailableMemory: mem.ullAvailPhys,
+		SystemMemory:    uint64(mem.ullTotalPhys),
+		AvailableMemory: uint64(mem.ullAvailPhys),
 	}
 }
 
 func GetRamInformation() (MemoryInformation, error) {
-	return getWinRamInfo(getWindowsTools().ProcGlobalMemoryStatusEx), nil
+	return getWinRamInfo(windows_system.GetWindowsTools().ProcGlobalMemoryStatusEx), nil
 }

internal/processor/cpu.go

@@ -0,0 +1,34 @@
+package processor
+
+import "time"
+
+type ProcessorInformation struct {
+	IdleTimeSinceBoot   uint64
+	KernelTimeSinceBoot uint64
+	UserTimeSinceBoot   uint64
+}
+
+func (procInfo ProcessorInformation) Usage() (
+	TotalCPUUsage float64,
+	KernelCPUUsage float64,
+	UserCPUUsage float64,
+	IdleCPUUsage float64,
+) {
+	first := GetCPUInformation()
+	time.Sleep(time.Second)
+	second := GetCPUInformation()
+
+	deltaIdleTime := second.IdleTimeSinceBoot - first.IdleTimeSinceBoot
+	deltaKernelTime := second.KernelTimeSinceBoot - first.KernelTimeSinceBoot
+	deltaUserTime := second.UserTimeSinceBoot - first.UserTimeSinceBoot
+	deltaTotalTime := deltaIdleTime + deltaKernelTime + deltaUserTime
+
+	if deltaTotalTime > 0 {
+		TotalCPUUsage = ((float64(deltaKernelTime) + float64(deltaUserTime)) / float64(deltaTotalTime)) * 100
+		UserCPUUsage = (float64(deltaUserTime) / float64(deltaTotalTime)) * 100
+		KernelCPUUsage = (float64(deltaKernelTime) / float64(deltaTotalTime)) * 100
+		IdleCPUUsage = (float64(deltaIdleTime) / float64(deltaTotalTime)) * 100
+	}
+
+	return TotalCPUUsage, KernelCPUUsage, UserCPUUsage, IdleCPUUsage
+}

internal/processor/linux_cpu.go

@@ -0,0 +1,50 @@
+//go:build linux
+
+package processor
+
+import (
+	"bufio"
+	"fmt"
+	"log"
+	"os"
+	"regexp"
+	"strings"
+)
+
+var numberRegex *regexp.Regexp = regexp.MustCompile(`\d+`)
+
+func getLinuxCpuInfo() (ProcessorInformation, error) {
+	procFile, err := os.Open("/proc/meminfo")
+	if err != nil {
+		return ProcessorInformation{}, fmt.Errorf("Could not find /proc/meminfo. Are you sure you are on linux?")
+	}
+	defer procFile.Close()
+
+	fileReader := bufio.NewScanner(procFile)
+
+	//var idleTime uint64
+	//var kernelTime uint64
+	//var userTime uint64
+
+	for fileReader.Scan() {
+		line := fileReader.Text()
+
+		if strings.HasPrefix(line, "cpu ") {
+			fields := strings.Split(line, " ")
+			for _, field := range fields {
+				fmt.Print(field)
+			}
+		}
+	}
+
+	return ProcessorInformation{}, nil
+}
+
+func GetCPUInformation() ProcessorInformation {
+	info, err := getLinuxCpuInfo()
+	if err != nil {
+		log.Printf("Could not read processor info. Error: %v", err)
+		return ProcessorInformation{}
+	}
+	return info
+}

internal/processor/win_cpu.go

@@ -0,0 +1,48 @@
+//go:build windows
+
+package processor
+
+import (
+	"rpi5-health/internal/windows_system"
+	"unsafe"
+
+	"golang.org/x/sys/windows"
+)
+
+type DWORD uint32
+
+type PFILETIME struct {
+	dwLowDateTime  DWORD
+	dwHighDateTime DWORD
+}
+
+func getWinCpuInfo(getSystemTimes *windows.LazyProc) ProcessorInformation {
+	var lpIdleTime PFILETIME
+	var lpKernelTime PFILETIME
+	var lpUserTime PFILETIME
+
+	getSystemTimes.Call(
+		uintptr(unsafe.Pointer(&lpIdleTime)),
+		uintptr(unsafe.Pointer(&lpKernelTime)),
+		uintptr(unsafe.Pointer(&lpUserTime)),
+	)
+
+	timeSpentIdlingTicks := fileTimeToTicks(lpIdleTime)
+	timeSpentByKernelTicks := fileTimeToTicks(lpKernelTime) - timeSpentIdlingTicks // kernel time includes idling by default
+	timeSpentByUserTicks := fileTimeToTicks(lpUserTime)
+
+	return ProcessorInformation{
+		IdleTimeSinceBoot:   timeSpentIdlingTicks,
+		KernelTimeSinceBoot: timeSpentByKernelTicks,
+		UserTimeSinceBoot:   timeSpentByUserTicks,
+	}
+}
+
+func fileTimeToTicks(filetime PFILETIME) uint64 {
+	// 100 nanosecond intervals since 1601, january 1
+	return (uint64(filetime.dwHighDateTime) << 32) | uint64(filetime.dwLowDateTime)
+}
+
+func GetCPUInformation() ProcessorInformation {
+	return getWinCpuInfo(windows_system.GetWindowsTools().SystemTimes)
+}

internal/windows_system/win.go

@@ -1,6 +1,6 @@
 //go:build windows
 
-package system_check
+package windows_system
 
 import (
 	"sync"
@@ -17,14 +17,20 @@ type WindowsSystemCheckTools struct {
 	 * Windows memory information
 	 */
 	ProcGlobalMemoryStatusEx *windows.LazyProc
+	/*
+	 * Windows processor information
+	 */
+	SystemTimes *windows.LazyProc
 }
 
-func getWindowsTools() WindowsSystemCheckTools {
+func GetWindowsTools() WindowsSystemCheckTools {
 	kernel32 := sync.OnceValue(func() *windows.LazyDLL { return windows.NewLazySystemDLL("kernel32.dll") })
 	procGlobalMemoryStatusEx := sync.OnceValue(func() *windows.LazyProc { return kernel32().NewProc("GlobalMemoryStatusEx") })
+	systemTimes := sync.OnceValue(func() *windows.LazyProc { return kernel32().NewProc("GetSystemTimes") })
 
 	return WindowsSystemCheckTools{
 		Kernel32:                 kernel32(),
 		ProcGlobalMemoryStatusEx: procGlobalMemoryStatusEx(),
+		SystemTimes:              systemTimes(),
 	}
 }