lzrdblzzrd
da13a6d549
Previously, once a process was promoted to HIGH, it stayed HIGH forever even if its RSS dropped well below the -mem threshold. Now promoted processes are demoted back to NORMAL when RSS < -mem, and removed from the promoted map. Also: added TZ.md with full technical specification of the project.
632 lines
15 KiB
Go
632 lines
15 KiB
Go
//go:build windows
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package main
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import (
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"flag"
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"fmt"
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"os"
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"os/signal"
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"path/filepath"
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"strconv"
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"strings"
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"syscall"
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"time"
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"unsafe"
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)
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const (
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CreateToolhelp32SnapshotProcess = 0x00000002
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ProcessTerminate = 0x00000001
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ProcessSetInformation = 0x00000200
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ProcessQueryInformation = 0x00000400
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ProcessQueryLimitedInformation = 0x00001000
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PriorityClassIdle = 0x00000040
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PriorityClassNormal = 0x00000020
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PriorityClassHigh = 0x00000080
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PriorityClassAboveNormal = 0x00008000
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PriorityClassRealtime = 0x00000100
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PriorityClassBelowNormal = 0x00004000
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ErrorNoMoreFiles = 18
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)
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type processEntry32 struct {
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Size uint32
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CntUsage uint32
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PID uint32
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DefaultHeapID uintptr
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ModuleID uint32
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CntThreads uint32
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ParentPID uint32
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PrioClass int32
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Flags uint32
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ExeFile [260]uint16
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}
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type processMemoryCounters struct {
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CBM uint32
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PageFaultCount uint32
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PeakWorkingSetSize uintptr
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WorkingSetSize uintptr
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QuotaPeakPagedPoolUsage uintptr
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QuotaPagedPoolUsage uintptr
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QuotaPeakNonPagedPoolUsage uintptr
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QuotaNonPagedPoolUsage uintptr
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PeakPagefileUsage uintptr
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PagefileUsage uintptr
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PrivateUsage uintptr
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}
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type processInfo struct {
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PID uint32
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Name string
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}
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var (
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k32 = syscall.NewLazyDLL("kernel32.dll")
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ps = syscall.NewLazyDLL("psapi.dll")
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procCreateSnap = k32.NewProc("CreateToolhelp32Snapshot")
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procProcess32First = k32.NewProc("Process32FirstW")
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procProcess32Next = k32.NewProc("Process32NextW")
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procGetMemInfo = ps.NewProc("GetProcessMemoryInfo")
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procSetPriority = k32.NewProc("SetPriorityClass")
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procGetPriority = k32.NewProc("GetPriorityClass")
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procOpenProcess = k32.NewProc("OpenProcess")
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procCloseHandle = k32.NewProc("CloseHandle")
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procTerminate = k32.NewProc("TerminateProcess")
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)
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func closeH(h syscall.Handle) {
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_, _, _ = procCloseHandle.Call(uintptr(h))
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}
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func openProc(pid uint32, acc uint32) (syscall.Handle, error) {
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r, _, e := procOpenProcess.Call(uintptr(acc), 0, uintptr(pid))
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if r == 0 {
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return 0, fmt.Errorf("OpenProcess(%d) failed: %w", pid, e)
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}
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return syscall.Handle(r), nil
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}
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func setPrio(pid uint32, cls uint32) error {
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h, err := openProc(pid, ProcessSetInformation)
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if err != nil {
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return err
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}
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defer closeH(h)
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r, _, e := procSetPriority.Call(uintptr(h), uintptr(cls))
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if r == 0 {
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return fmt.Errorf("SetPriorityClass(%d) failed: %w", pid, e)
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}
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return nil
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}
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func curPrioWithHandle(h syscall.Handle) (uint32, error) {
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r, _, e := procGetPriority.Call(uintptr(h))
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if r == 0 {
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return 0, fmt.Errorf("GetPriorityClass failed: %w", e)
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}
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return uint32(r), nil
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}
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func utf16Trim(p []uint16) string {
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for i, v := range p {
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if v == 0 {
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return syscall.UTF16ToString(p[:i])
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}
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}
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return syscall.UTF16ToString(p)
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}
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func parseMemSize(s string) (uint64, error) {
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s = strings.TrimSpace(s)
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if s == "" {
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return 0, fmt.Errorf("empty value")
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}
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var suffix byte
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switch s[len(s)-1] {
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case 'k', 'K':
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suffix = 'K'
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s = s[:len(s)-1]
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case 'm', 'M':
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suffix = 'M'
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s = s[:len(s)-1]
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case 'g', 'G':
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suffix = 'G'
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s = s[:len(s)-1]
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}
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n, err := strconv.ParseUint(s, 10, 64)
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if err != nil {
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return 0, err
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}
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switch suffix {
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case 'K':
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return n * 1024, nil
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case 'M':
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return n * 1024 * 1024, nil
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case 'G':
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return n * 1024 * 1024 * 1024, nil
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default:
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return n, nil
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}
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}
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func formatMemSize(b uint64) string {
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if b >= 1024*1024*1024 {
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return fmt.Sprintf("%.1fGB", float64(b)/(1024*1024*1024))
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}
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if b >= 1024*1024 {
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return fmt.Sprintf("%dMB", b/1024/1024)
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}
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return fmt.Sprintf("%dKB", b/1024)
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}
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func allProcs() ([]processInfo, error) {
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snap, _, e := procCreateSnap.Call(CreateToolhelp32SnapshotProcess, 0)
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if snap == 0 {
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return nil, fmt.Errorf("CreateToolhelp32Snapshot failed: %w", e)
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}
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defer closeH(syscall.Handle(snap))
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pe := processEntry32{Size: uint32(unsafe.Sizeof(processEntry32{}))}
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r, _, e := procProcess32First.Call(snap, uintptr(unsafe.Pointer(&pe)))
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if r == 0 {
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return nil, fmt.Errorf("Process32First failed: %w", e)
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}
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var out []processInfo
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for {
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name := utf16Trim(pe.ExeFile[:])
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if name != "" {
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out = append(out, processInfo{PID: pe.PID, Name: name})
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}
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pe.Size = uint32(unsafe.Sizeof(processEntry32{}))
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r, _, e = procProcess32Next.Call(snap, uintptr(unsafe.Pointer(&pe)))
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if r == 0 {
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if e == syscall.Errno(ErrorNoMoreFiles) {
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break
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}
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return nil, fmt.Errorf("Process32Next failed: %w", e)
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}
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}
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return out, nil
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}
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func isAboveNormal(c uint32) bool {
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return c == PriorityClassAboveNormal ||
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c == PriorityClassHigh ||
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c == PriorityClassRealtime
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}
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func prioName(c uint32) string {
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switch c {
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case PriorityClassIdle:
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return "IDLE"
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case PriorityClassBelowNormal:
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return "BELOW_NORMAL"
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case PriorityClassNormal:
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return "NORMAL"
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case PriorityClassAboveNormal:
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return "ABOVE_NORMAL"
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case PriorityClassHigh:
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return "HIGH"
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case PriorityClassRealtime:
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return "REALTIME"
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default:
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return fmt.Sprintf("0x%X", c)
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}
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}
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func killOtherInstances() {
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myPID := os.Getpid()
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procs, err := allProcs()
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if err != nil {
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return
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}
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myName := filepath.Base(os.Args[0])
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for _, p := range procs {
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if p.PID != uint32(myPID) && filepath.Base(p.Name) == myName {
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h, err := openProc(p.PID, ProcessTerminate)
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if err == nil {
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procTerminate.Call(uintptr(h), 0)
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closeH(h)
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}
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}
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}
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}
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func main() {
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memStr := flag.String("mem", "512M", "memory threshold (e.g. 512M, 1G, 2048M)")
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gameMemStr := flag.String("game-mem", "4G", "game memory threshold (e.g. 3G, 4G). Must be greater than -mem. 0 = disabled.")
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interval := flag.Duration("interval", time.Minute, "scan interval")
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dryRun := flag.Bool("dry-run", false, "log only, do not change priorities")
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flag.Parse()
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if *interval < 10*time.Second {
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*interval = 10 * time.Second
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}
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mem, err := parseMemSize(*memStr)
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if err != nil {
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fmt.Fprintf(os.Stderr, "autoPriority: invalid -mem value: %v\n", err)
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os.Exit(1)
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}
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gameMem, err := parseMemSize(*gameMemStr)
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if err != nil {
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fmt.Fprintf(os.Stderr, "autoPriority: invalid -game-mem value: %v\n", err)
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os.Exit(1)
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}
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if gameMem > 0 && gameMem <= mem {
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fmt.Fprintf(os.Stderr, "autoPriority: -game-mem must be greater than -mem\n")
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os.Exit(1)
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}
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killOtherInstances()
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time.Sleep(100 * time.Millisecond)
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var logFile *os.File
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logPath := filepath.Join(os.TempDir(), "autopriority.log")
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os.Remove(logPath)
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f, err := os.OpenFile(logPath,
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os.O_CREATE|os.O_WRONLY|os.O_EXCL, 0644)
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if err == nil {
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logFile = f
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defer logFile.Close()
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}
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ts := func() string {
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return time.Now().Format("02.01.2006 15:04:05")
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}
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logf := func(format string, a ...any) {
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if logFile == nil {
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return
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}
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fmt.Fprintf(logFile, "[%s] ", ts())
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fmt.Fprintf(logFile, format+"\n", a...)
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logFile.Sync()
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}
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if gameMem > 0 {
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logf("autoPriority started (mem=%s, game-mem=%s, interval=%s, dry-run=%v)", formatMemSize(mem), formatMemSize(gameMem), *interval, *dryRun)
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} else {
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logf("autoPriority started (mem=%s, interval=%s, dry-run=%v)", formatMemSize(mem), *interval, *dryRun)
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}
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if err := setPrio(uint32(os.Getpid()), PriorityClassIdle); err != nil {
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logf("warning: could not set own priority to IDLE: %v", err)
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} else {
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logf("own priority set to IDLE")
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}
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promoted := make(map[uint32]string)
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blocked := make(map[uint32]string)
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gameProcs := make(map[uint32]string)
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gameMode := false
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type savedPrio struct {
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name string
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prio uint32
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}
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gameSaved := make(map[uint32]savedPrio)
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defer func() {
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restoreProcs, _ := allProcs()
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restoreMap := make(map[uint32]string, len(restoreProcs))
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for _, p := range restoreProcs {
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restoreMap[p.PID] = p.Name
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}
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for pid, sv := range gameSaved {
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if cur, ok := restoreMap[pid]; !ok || cur != sv.name {
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continue
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}
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if err := setPrio(pid, sv.prio); err != nil {
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logf("RESTORE %s (PID %d) -> %s error: %v", sv.name, pid, prioName(sv.prio), err)
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} else {
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logf("RESTORE %s (PID %d) -> %s", sv.name, pid, prioName(sv.prio))
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}
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}
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for pid, name := range promoted {
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if cur, ok := restoreMap[pid]; !ok || cur != name {
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logf("SKIP RESTORE PID %d: process name mismatch (expected %s, got %s)", pid, name, cur)
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continue
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}
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if err := setPrio(pid, PriorityClassNormal); err != nil {
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logf("RESTORE %s (PID %d) -> NORMAL error: %v", name, pid, err)
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} else {
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logf("RESTORE %s (PID %d) -> NORMAL", name, pid)
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}
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}
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for pid, name := range gameProcs {
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if cur, ok := restoreMap[pid]; !ok || cur != name {
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logf("SKIP RESTORE PID %d: process name mismatch (expected %s, got %s)", pid, name, cur)
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continue
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}
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if err := setPrio(pid, PriorityClassNormal); err != nil {
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logf("RESTORE %s (PID %d) -> NORMAL error: %v", name, pid, err)
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} else {
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logf("RESTORE %s (PID %d) -> NORMAL", name, pid)
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}
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}
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logf("autoPriority stopped")
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}()
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myPID := uint32(os.Getpid())
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ticker := time.NewTicker(*interval)
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defer ticker.Stop()
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stop := make(chan os.Signal, 1)
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signal.Notify(stop, os.Interrupt, syscall.SIGTERM)
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trySetPrio := func(qh syscall.Handle, pid uint32, name string, cls uint32) bool {
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closeH(qh)
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sh, err := openProc(pid, ProcessSetInformation)
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if err != nil {
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blocked[pid] = name
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logf("BLOCK %s (PID %d): open SetInformation failed: %v (added to exclusion list)", name, pid, err)
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return false
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}
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defer closeH(sh)
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sr, _, se := procSetPriority.Call(uintptr(sh), uintptr(cls))
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if sr == 0 {
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blocked[pid] = name
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logf("BLOCK %s (PID %d): SetPriorityClass failed: %v (added to exclusion list)", name, pid, se)
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return false
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}
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time.Sleep(50 * time.Millisecond)
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return true
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}
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scan := func() {
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procs, err := allProcs()
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if err != nil {
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logf("allProcs error: %v", err)
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return
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}
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pidMap := make(map[uint32]string, len(procs))
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for _, p := range procs {
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pidMap[p.PID] = p.Name
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}
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for pid, name := range promoted {
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if cur, ok := pidMap[pid]; !ok || cur != name {
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delete(promoted, pid)
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}
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}
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for pid := range blocked {
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if _, ok := pidMap[pid]; !ok {
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delete(blocked, pid)
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}
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}
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for pid, name := range gameProcs {
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if cur, ok := pidMap[pid]; !ok || cur != name {
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delete(gameProcs, pid)
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}
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}
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type procRSS struct {
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info processInfo
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rss uint64
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}
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var procList []procRSS
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for _, p := range procs {
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if p.PID == myPID || p.PID == 0 {
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continue
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}
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h, err := openProc(p.PID, ProcessQueryLimitedInformation)
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if err != nil {
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if _, ok := blocked[p.PID]; !ok {
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blocked[p.PID] = p.Name
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logf("BLOCK %s (PID %d): %v (added to exclusion list)", p.Name, p.PID, err)
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}
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continue
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}
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var m processMemoryCounters
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m.CBM = uint32(unsafe.Sizeof(m))
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r, _, e := procGetMemInfo.Call(uintptr(h), uintptr(unsafe.Pointer(&m)), uintptr(unsafe.Sizeof(m)))
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if r == 0 {
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closeH(h)
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if _, ok := blocked[p.PID]; !ok {
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logf("GetProcessMemoryInfo(%d) error: %v", p.PID, e)
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}
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continue
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}
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closeH(h)
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rssBytes := uint64(m.WorkingSetSize)
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procList = append(procList, procRSS{p, rssBytes})
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if gameMem > 0 && rssBytes >= gameMem {
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if _, ok := gameProcs[p.PID]; !ok {
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gameProcs[p.PID] = p.Name
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}
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}
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}
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hasGame := gameMem > 0 && len(gameProcs) > 0
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for _, pr := range procList {
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p := pr.info
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rssBytes := pr.rss
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isBlocked := false
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if _, ok := blocked[p.PID]; ok {
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isBlocked = true
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}
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if _, ok := gameProcs[p.PID]; ok {
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if hasGame {
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if isBlocked {
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logf("GAME %s (PID %d) RSS=%s — tracked as game (blocked)", p.Name, p.PID, formatMemSize(rssBytes))
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continue
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}
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h, err := openProc(p.PID, ProcessQueryLimitedInformation)
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if err != nil {
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continue
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}
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origPrio, prioErr := curPrioWithHandle(h)
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if prioErr != nil {
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closeH(h)
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continue
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}
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if origPrio == PriorityClassHigh {
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closeH(h)
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continue
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}
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if *dryRun {
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closeH(h)
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logf("[DRY-RUN] %s (PID %d) RSS=%s — would set HIGH (game)",
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p.Name, p.PID, formatMemSize(rssBytes))
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} else {
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if trySetPrio(h, p.PID, p.Name, PriorityClassHigh) {
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logf("GAME %s (PID %d) RSS=%s -> HIGH",
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p.Name, p.PID, formatMemSize(rssBytes))
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} else {
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logf("GAME %s (PID %d) RSS=%s — tracked as game (priority change failed)",
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p.Name, p.PID, formatMemSize(rssBytes))
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}
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}
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}
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continue
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}
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if hasGame {
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if isBlocked {
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continue
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}
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h, err := openProc(p.PID, ProcessQueryLimitedInformation)
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if err != nil {
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continue
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}
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origPrio, prioErr := curPrioWithHandle(h)
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if prioErr != nil {
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closeH(h)
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continue
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}
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if origPrio == PriorityClassIdle {
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closeH(h)
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continue
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}
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origStr := prioName(origPrio)
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if *dryRun {
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closeH(h)
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logf("[DRY-RUN] %s (PID %d) RSS=%s, priority=%s — would set IDLE (game)",
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p.Name, p.PID, formatMemSize(rssBytes), origStr)
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} else {
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if trySetPrio(h, p.PID, p.Name, PriorityClassIdle) {
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if _, saved := gameSaved[p.PID]; !saved {
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gameSaved[p.PID] = savedPrio{name: p.Name, prio: origPrio}
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}
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delete(promoted, p.PID)
|
|
logf("GAME %s (PID %d) RSS=%s, %s -> IDLE",
|
|
p.Name, p.PID, formatMemSize(rssBytes), origStr)
|
|
}
|
|
}
|
|
continue
|
|
}
|
|
|
|
if isBlocked {
|
|
continue
|
|
}
|
|
|
|
h, err := openProc(p.PID, ProcessQueryLimitedInformation)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
|
|
if rssBytes < mem {
|
|
origPrio, prioErr := curPrioWithHandle(h)
|
|
if prioErr == nil && isAboveNormal(origPrio) {
|
|
if *dryRun {
|
|
closeH(h)
|
|
logf("[DRY-RUN] %s (PID %d) RSS=%s, priority=%s — would set NORMAL",
|
|
p.Name, p.PID, formatMemSize(rssBytes), prioName(origPrio))
|
|
} else {
|
|
if trySetPrio(h, p.PID, p.Name, PriorityClassNormal) {
|
|
delete(promoted, p.PID)
|
|
logf("DEMOTE %s (PID %d) RSS=%s, %s -> NORMAL",
|
|
p.Name, p.PID, formatMemSize(rssBytes), prioName(origPrio))
|
|
}
|
|
}
|
|
} else {
|
|
closeH(h)
|
|
}
|
|
continue
|
|
}
|
|
|
|
origPrio, prioErr := curPrioWithHandle(h)
|
|
if prioErr != nil {
|
|
closeH(h)
|
|
continue
|
|
}
|
|
if origPrio == PriorityClassHigh {
|
|
closeH(h)
|
|
continue
|
|
}
|
|
origStr := prioName(origPrio)
|
|
|
|
if *dryRun {
|
|
closeH(h)
|
|
logf("[DRY-RUN] %s (PID %d) RSS=%s, priority=%s — would set HIGH",
|
|
p.Name, p.PID, formatMemSize(rssBytes), origStr)
|
|
continue
|
|
}
|
|
|
|
if trySetPrio(h, p.PID, p.Name, PriorityClassHigh) {
|
|
promoted[p.PID] = p.Name
|
|
logf("PROMOTE %s (PID %d) RSS=%s, %s -> HIGH",
|
|
p.Name, p.PID, formatMemSize(rssBytes), origStr)
|
|
}
|
|
}
|
|
|
|
if gameMem > 0 {
|
|
newHasGame := len(gameProcs) > 0
|
|
if newHasGame && !gameMode {
|
|
gameMode = true
|
|
logf("GAME MODE ON")
|
|
}
|
|
if !newHasGame && gameMode {
|
|
gameMode = false
|
|
logf("GAME MODE OFF")
|
|
for pid, sv := range gameSaved {
|
|
cur, ok := pidMap[pid]
|
|
if !ok || cur != sv.name {
|
|
delete(gameSaved, pid)
|
|
continue
|
|
}
|
|
if *dryRun {
|
|
logf("[DRY-RUN] RESTORE %s (PID %d) -> %s", sv.name, pid, prioName(sv.prio))
|
|
} else {
|
|
if err := setPrio(pid, sv.prio); err != nil {
|
|
logf("RESTORE %s (PID %d) -> %s error: %v", sv.name, pid, prioName(sv.prio), err)
|
|
} else {
|
|
logf("RESTORE %s (PID %d) -> %s", sv.name, pid, prioName(sv.prio))
|
|
}
|
|
}
|
|
delete(gameSaved, pid)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
scan()
|
|
for {
|
|
select {
|
|
case <-stop:
|
|
logf("received shutdown signal")
|
|
return
|
|
case <-ticker.C:
|
|
scan()
|
|
}
|
|
}
|
|
}
|