diff --git a/.gitignore b/.gitignore
index 27f6a34..a0ff50c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -122,3 +122,4 @@ $RECYCLE.BIN/
 build/
 vendor/
 
+cpu_ctrl
diff --git a/daemon/daemon.go b/daemon/daemon.go
new file mode 100644
index 0000000..ae514cf
--- /dev/null
+++ b/daemon/daemon.go
@@ -0,0 +1,14 @@
+package daemon
+
+import "github.com/coreos/go-systemd/daemon"
+
+const (
+	DaemonStarted  = notifyType("READY=1")
+	DaemonStopping = notifyType("STOPPING=1")
+)
+
+type notifyType string
+
+func NotifyDaemon(status notifyType) {
+	daemon.SdNotify(false, string(status))
+}
diff --git a/logger/logger.go b/logger/logger.go
new file mode 100644
index 0000000..04a83c6
--- /dev/null
+++ b/logger/logger.go
@@ -0,0 +1,109 @@
+package logger
+
+import (
+	"io"
+	"os"
+	"path"
+
+	"github.com/sirupsen/logrus"
+	"github.com/x-cray/logrus-prefixed-formatter"
+	"gopkg.in/natefinch/lumberjack.v2"
+)
+
+var (
+	logger    = logrus.StandardLogger()
+	rotaters  []*lumberjack.Logger
+	logDir    string
+	formatter = prefixed.TextFormatter{}
+)
+
+type Config struct {
+	FileName  string
+	MaxSizeMb int
+	MaxBackup int
+	MaxDay    int
+}
+
+type Logger interface {
+	Debugf(format string, args ...interface{})
+	Infof(format string, args ...interface{})
+	Printf(format string, args ...interface{})
+	Warnf(format string, args ...interface{})
+	Warningf(format string, args ...interface{})
+	Errorf(format string, args ...interface{})
+	Fatalf(format string, args ...interface{})
+	Panicf(format string, args ...interface{})
+	Debug(args ...interface{})
+	Info(args ...interface{})
+	Print(args ...interface{})
+	Warn(args ...interface{})
+	Warning(args ...interface{})
+	Error(args ...interface{})
+	Fatal(args ...interface{})
+	Panic(args ...interface{})
+	Debugln(args ...interface{})
+	Infoln(args ...interface{})
+	Println(args ...interface{})
+	Warnln(args ...interface{})
+	Warningln(args ...interface{})
+	Errorln(args ...interface{})
+	Fatalln(args ...interface{})
+	Panicln(args ...interface{})
+}
+
+func init() {
+	logger.Formatter = &formatter
+}
+func LoggerIsStd() bool {
+	return !formatter.DisableColors
+}
+func InitLogger(verbose bool, logDirArg string, config *Config) {
+	logDir = logDirArg
+	colorSupport, writer := NewLogWriter(config)
+	formatter.DisableColors = !colorSupport
+	logger.Out = writer
+	if verbose {
+		logger.Level = logrus.DebugLevel
+	} else {
+		logger.Level = logrus.InfoLevel
+	}
+}
+
+func NewLogger(prefix string) Logger {
+	return logrus.NewEntry(logger).WithField("prefix", prefix)
+}
+func NewLogWriter(config *Config) (bool, io.Writer) {
+	switch config.FileName {
+	case "Stdout":
+		return true, os.Stdout
+	case "Stderr":
+		return true, os.Stderr
+	default:
+		logpath := config.FileName
+		if logDir != "" {
+			logpath = path.Join(logDir, config.FileName)
+		}
+		logger.Info(" Attention!! log writes to ", config.FileName)
+		rotater := &lumberjack.Logger{
+			Filename:   logpath,
+			MaxSize:    config.MaxSizeMb, // megabytes
+			MaxBackups: config.MaxBackup,
+			MaxAge:     config.MaxDay, //days
+			LocalTime:  true,
+			Compress:   true,
+		}
+		rotaters = append(rotaters, rotater)
+		return false, rotater
+	}
+}
+
+func RotateLogger() {
+	if len(rotaters) == 0 {
+		return
+	}
+	logger.Info("rotating logger")
+	for _, rotater := range rotaters {
+		rotater.Rotate()
+	}
+	logger.Info("rotated")
+}
diff --git a/main.go b/main.go
index 07957f6..6cf4351 100644
--- a/main.go
+++ b/main.go
@@ -1,228 +1,89 @@
 package main
 
 import (
-	"context"
 	"errors"
-	"fmt"
-	"io/ioutil"
 	"os"
-	"os/exec"
 	"os/signal"
-	"path"
-	"path/filepath"
-	"strconv"
-	"strings"
-	"sync"
+	"runtime"
 	"syscall"
 	"time"
 
-	"amuz.es/src/infra/cpu_ctrl/pid"
-
-	"github.com/coreos/go-systemd/daemon"
-	"github.com/shirou/gopsutil/cpu"
-)
-
-const (
-	auto = 0x0
-	min  = 0x04
-	max  = 0x64
+	"amuz.es/src/infra/cpu_ctrl/daemon"
+	"amuz.es/src/infra/cpu_ctrl/logger"
+	"amuz.es/src/infra/cpu_ctrl/processor"
+	"amuz.es/src/infra/cpu_ctrl/util"
 )
 
 var (
-	prefix = [...]int{0x3a, 0x01}
-	suffix = [...]int{auto, auto, auto, auto, auto, auto}
+	log = logger.NewLogger("cpu_ctrl")
 )
 
-type notifyType string
-
-const (
-	DaemonStarted  = notifyType("READY=1")
-	DaemonStopping = notifyType("STOPPING=1")
-)
-
-func NotifyDaemon(status notifyType) {
-	daemon.SdNotify(false, string(status))
+func init() {
+	logger.InitLogger(true, "", &logger.Config{FileName: "Stderr"})
+	setMaxProcs()
 }
 
-func getProcessorCount() int {
-	var maxcpu int
-	stat, err := cpu.Info()
-	if err != nil {
-		panic(err)
-	}
-	for _, info := range stat {
-		physicalId, err := strconv.Atoi(info.PhysicalID)
-		if err != nil {
-			panic(err)
-		} else if maxcpu < physicalId {
-			maxcpu = physicalId
-		}
-	}
-	return maxcpu + 1
-}
+func setMaxProcs() {
+	// TODO(vmarmol): Consider limiting if we have a CPU mask in effect.
+	// Allow as many threads as we have cores unless the user specified a value.
+	var numProcs int
+	// if *maxProcs < 1 {
+	numProcs = runtime.NumCPU()
+	// } else {
+	// numProcs = *maxProcs
+	// }
+	runtime.GOMAXPROCS(numProcs)
 
-type Processor struct {
-	Id            int
-	TempeturePath string
-}
-
-type TempetureChange struct {
-	Id        int
-	Tempeture float64
-}
-
-func getProcessorInfo(processorId int) (*Processor, error) {
-	if matches, err := filepath.Glob(fmt.Sprintf("/sys/devices/platform/coretemp.%d/hwmon/hwmon?", processorId)); err != nil {
-		return nil, err
-	} else if matches == nil {
-		return nil, errors.New("hwmon not found!")
-	} else {
-		return &Processor{
-			Id:            processorId,
-			TempeturePath: matches[0],
-		}, nil
-	}
-}
-func ReadTempeture(path string, senseChan chan<- float64, errorChan chan<- error, waiter *sync.WaitGroup) {
-	defer waiter.Done()
-	if dat, err := ioutil.ReadFile(path); err != nil {
-		errorChan <- err
-	} else if tempetureSense, err := strconv.Atoi(strings.TrimSpace(string(dat))); err != nil {
-		errorChan <- err
-	} else {
-		senseChan <- float64(tempetureSense) / 1000.0
-	}
-}
-
-func CpuTempetureMonitoring(info *Processor, sampleDuration time.Duration, notifier chan<- TempetureChange, errorChan chan<- error, ctx context.Context, waiter *sync.WaitGroup) {
-	defer waiter.Done()
-	tempeturePathGlob := path.Join(info.TempeturePath, "temp?_input")
-	ticker := time.Tick(sampleDuration)
-	for {
-		select {
-		case <-ticker:
-			matches, err := filepath.Glob(tempeturePathGlob)
-			if err != nil {
-				panic(err)
-			}
-			tempetureReadWaiter := &sync.WaitGroup{}
-			queue := make(chan float64, len(matches))
-			// exclude package temp
-			for _, path := range matches[1:] {
-				tempetureReadWaiter.Add(1)
-				go ReadTempeture(path, queue, errorChan, tempetureReadWaiter)
-			}
-			tempetureReadWaiter.Wait()
-			close(queue)
-			var tempeture float64
-			for sense := range queue {
-				if tempeture < sense {
-					tempeture = sense
-				}
-			}
-			notifier <- TempetureChange{
-				Id:        info.Id,
-				Tempeture: tempeture,
-			}
-		case <-ctx.Done():
-			return
-		}
-	}
-}
-func CpuTempetureScraper(processorCount int, notifier <-chan TempetureChange, errorChan chan<- error, ctx context.Context, waiter *sync.WaitGroup) {
-	defer waiter.Done()
-	var (
-		P, I, D          = 1.5, 0.4, 2.0
-		SetPoint         = 38.0
-		SampleTime       = time.Second
-		maxNoob, minNoob = 0x64, 0x4
-		WindupGuard      = float64(maxNoob - minNoob)
-	)
-	noobs := make([]int, processorCount)
-	controllers := make([]pid.Controller, 0, processorCount)
-	for i := 0; i < processorCount; i++ {
-		controller := pid.New(P, I, D)
-		controller.SetSetPoint(SetPoint)
-		controller.SetSampleTime(SampleTime)
-		controller.SetWindupGuard(WindupGuard)
-		controllers = append(controllers, controller)
-	}
-
-	for {
-		select {
-		case change := <-notifier:
-			controller := controllers[change.Id]
-			adj_noob := int(-controller.Update(change.Tempeture))
-			if adj_noob < minNoob {
-				adj_noob = minNoob
-			} else if adj_noob > maxNoob {
-				adj_noob = maxNoob
-			}
-			if noobs[change.Id] == adj_noob {
-				continue
-			}
-			noobs[change.Id] = adj_noob
-			fmt.Printf("cpu %d fan 0x%x\n", change.Id, adj_noob)
-
-			args := make([]string, 0)
-			args = append(args,
-				"raw",
-				"0x3a", "0x01",
-			)
-			for _, item := range noobs {
-				args = append(args, fmt.Sprintf("0x%x", item))
-			}
-			args = append(args,
-				"0x0", "0x0", "0x0", "0x0", "0x0", "0x0",
-			)
-			cmd := exec.Command("ipmitool", args...)
-			if err := cmd.Run(); err != nil {
-				errorChan <- err
-				return
-			}
-		case <-ctx.Done():
-			return
-		}
+	// Check if the setting was successful.
+	actualNumProcs := runtime.GOMAXPROCS(0)
+	if actualNumProcs != numProcs {
+		log.Printf("Specified max procs of %v but using %v\n", numProcs, actualNumProcs)
 	}
 }
 
 func main() {
 	var (
-		processorCount  = getProcessorCount()
-		ctx, canceled   = context.WithCancel(context.Background())
-		waiter          = &sync.WaitGroup{}
-		exitSignal      = make(chan os.Signal, 1)
-		errorChan       = make(chan error, 1)
-		tempetureChange = make(chan TempetureChange)
-		sampleDuration  = time.Second
+		processorCount = processor.GetProcessorCount()
+		processors     []processor.Processor
+		exitSignal     = make(chan os.Signal, 1)
+		handler        = util.NewHandler()
+		sampleDuration = time.Second
 	)
+	log.Info("Cpu fan controller v0.2")
 
 	if processorCount == 0 {
-		errorChan <- errors.New("cpu not found!")
+		handler.NotifyError(errors.New("cpu not found!"))
 	}
+
+	processors = make([]processor.Processor, 0, processorCount)
 	for i := 0; i < processorCount; i++ {
-		if info, err := getProcessorInfo(i); err != nil {
-			errorChan <- err
+		if info, err := processor.NewProcessorInfo(handler, i, sampleDuration,
+			1.5, 0.4, 2.0, 38.0, 0x64, 0x4,
+		);
+			err != nil {
+			handler.NotifyError(err)
 		} else {
-			waiter.Add(1)
-			go CpuTempetureMonitoring(info, sampleDuration, tempetureChange, errorChan, ctx, waiter)
+			processors = append(processors, info)
+			handler.IncreaseWait()
+			go info.StartMonitoring()
 		}
 	}
-	waiter.Add(1)
-	go CpuTempetureScraper(processorCount, tempetureChange, errorChan, ctx, waiter)
-	defer waiter.Wait()
+
+	handler.IncreaseWait()
+	go TempetureControl(processors, tempetureChange, errorChan, ctx, waiter)
+
 	signal.Notify(exitSignal, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)
-	NotifyDaemon(DaemonStarted)
-	defer NotifyDaemon(DaemonStopping)
+	daemon.NotifyDaemon(daemon.DaemonStarted)
+	defer daemon.NotifyDaemon(daemon.DaemonStopping)
+	defer close(exitSignal)
+	defer handler.GracefullWait()
 
 	select {
-	case <-ctx.Done():
-		fmt.Println("Service request to close this application")
-	case err := <-errorChan:
-		canceled()
-		fmt.Printf("error! %s\n", err.Error())
+	case <-handler.Done():
+		log.Infoln("Service request to close this application")
+	case err := <-handler.Error():
+		log.Errorf("%s", err)
 	case sysSignal := <-exitSignal:
-		canceled()
-		fmt.Printf("SYSCALL! %s\n", sysSignal.String())
+		log.Warnf("SYSCALL! %s", sysSignal.String())
 	}
 }
diff --git a/processor/processor.go b/processor/processor.go
new file mode 100644
index 0000000..e963846
--- /dev/null
+++ b/processor/processor.go
@@ -0,0 +1,193 @@
+package processor
+
+import (
+	"github.com/shirou/gopsutil/cpu"
+	"strconv"
+	"path/filepath"
+	"fmt"
+	"errors"
+	"time"
+	"sync"
+	"path"
+	"amuz.es/src/infra/cpu_ctrl/logger"
+	"io/ioutil"
+	"strings"
+	"amuz.es/src/infra/cpu_ctrl/pid"
+	"amuz.es/src/infra/cpu_ctrl/util"
+)
+
+type processor struct {
+	handler           util.Handler
+	id                int
+	tempeturePath     string
+	tempeture         float64
+	tempetureChanged chan float64
+	sampleDuration    time.Duration
+	fanController     pid.Controller
+	fanSpeed          int
+	fanMaxSpeed       int
+	fanMinSpeed       int
+	fanSpeedChanged  chan int
+}
+type Processor interface {
+	Id() int
+	Tempeture() float64
+	FanSpeed() int
+	FanMaxSpeed() int
+	FanMinSpeed() int
+	StartMonitoring()
+	TempetureNotifier() <-chan float64
+	FanSpeedNotifier() <-chan int
+	getMaxTempetureOnProcessor(string) (float64)
+	readTempeture(string, chan<- float64, *sync.WaitGroup)
+	normalizeFanspeed(float64) (int)
+}
+
+var (
+	log = logger.NewLogger("processor")
+)
+
+func GetProcessorCount() (maxcpu int) {
+	stat, err := cpu.Info()
+	if err != nil {
+		panic(err)
+	}
+	for _, info := range stat {
+		physicalId, err := strconv.Atoi(info.PhysicalID)
+		if err != nil {
+			return
+		} else if maxcpu < physicalId {
+			maxcpu = physicalId
+		}
+	}
+	maxcpu += 1
+	return
+}
+
+func NewProcessorInfo(
+	handler util.Handler,
+	processorId int,
+	sampleDuration time.Duration,
+	P, I, D,
+	setPoint float64,
+	maxNoob, minNoob int,
+) (Processor, error) {
+
+	if matches, err := filepath.Glob(fmt.Sprintf("/sys/devices/platform/coretemp.%d/hwmon/hwmon?", processorId)); err != nil {
+		return nil, err
+	} else if matches == nil {
+		return nil, errors.New("hwmon not found!")
+	} else {
+		windupGuard := float64(maxNoob - minNoob)
+
+		controller := pid.New(P, I, D)
+		controller.SetSetPoint(setPoint)
+		controller.SetSampleTime(sampleDuration)
+		controller.SetWindupGuard(windupGuard)
+
+		return &processor{
+			handler:           handler,
+			id:                processorId,
+			tempeturePath:     matches[0],
+			tempetureChanged: make(chan float64),
+			sampleDuration:    sampleDuration,
+			fanController:     controller,
+			fanSpeedChanged:  make(chan int),
+			fanMaxSpeed:       maxNoob,
+			fanMinSpeed:       minNoob,
+		}, nil
+	}
+}
+func (p *processor) Id() int                           { return p.id }
+func (p *processor) Tempeture() float64                { return p.tempeture }
+func (p *processor) FanSpeed() int                     { return p.fanSpeed }
+func (p *processor) FanMaxSpeed() int                  { return p.fanMaxSpeed }
+func (p *processor) FanMinSpeed() int                  { return p.fanMinSpeed }
+func (p *processor) TempetureNotifier() <-chan float64 { return p.tempetureChanged }
+func (p *processor) FanSpeedNotifier() <-chan int      { return p.fanSpeedChanged }
+
+func (p *processor) StartMonitoring() {
+	defer p.handler.DecreaseWait()
+	defer func() {
+		if err := recover(); err != nil {
+			p.handler.NotifyError(err.(error))
+		}
+	}()
+
+	defer close(p.tempetureChanged)
+	defer close(p.fanSpeedChanged)
+
+	tempeturePathGlob := path.Join(p.tempeturePath, "temp?_input")
+	ticker := time.Tick(p.sampleDuration)
+	log.Infof("Processor %d monitor started with %s", p.id, p.sampleDuration)
+
+	for {
+		select {
+		case <-ticker:
+			var (
+				highestTemp float64
+				fanspeed    int
+			)
+
+			highestTemp = p.getMaxTempetureOnProcessor(tempeturePathGlob)
+			if highestTemp != p.tempeture {
+				p.tempetureChanged <- highestTemp
+				p.tempeture = highestTemp
+			}
+
+			fanspeed = p.normalizeFanspeed(p.fanController.Update(highestTemp))
+			if fanspeed != p.fanSpeed {
+				p.fanSpeedChanged <- fanspeed
+				p.fanSpeed = fanspeed
+			}
+
+		case <-p.handler.Done():
+			return
+		}
+	}
+}
+
+func (p *processor) getMaxTempetureOnProcessor(tempeturePathGlob string) (maxTempeture float64) {
+	matches, err := filepath.Glob(tempeturePathGlob)
+	if err != nil {
+		panic(err)
+	}
+
+	tempetureReadWaiter := &sync.WaitGroup{}
+	queue := make(chan float64, len(matches))
+	defer close(queue)
+
+	// exclude package temp
+	for _, tempetureFilePath := range matches[1:] {
+		tempetureReadWaiter.Add(1)
+		go p.readTempeture(tempetureFilePath, queue, tempetureReadWaiter)
+	}
+	tempetureReadWaiter.Wait()
+	for sense := range queue {
+		if maxTempeture < sense {
+			maxTempeture = sense
+		}
+	}
+	return
+}
+
+func (p *processor) readTempeture(path string, senseChan chan<- float64, waiter *sync.WaitGroup) {
+	defer waiter.Done()
+	if dat, err := ioutil.ReadFile(path); err != nil {
+		p.handler.NotifyError(err)
+	} else if tempetureSense, err := strconv.Atoi(strings.TrimSpace(string(dat))); err != nil {
+		p.handler.NotifyError(err)
+	} else {
+		senseChan <- float64(tempetureSense) / 1000.0
+	}
+}
+
+func (p *processor) normalizeFanspeed(response float64) (adjusted int) {
+	adjusted = int(-response)
+	if adjusted < p.fanMinSpeed {
+		adjusted = p.fanMinSpeed
+	} else if adjusted > p.fanMaxSpeed {
+		adjusted = p.fanMaxSpeed
+	}
+	return
+}
diff --git a/speed_ctrl/speed_controller.go b/speed_ctrl/speed_controller.go
new file mode 100644
index 0000000..3664bd6
--- /dev/null
+++ b/speed_ctrl/speed_controller.go
@@ -0,0 +1,85 @@
+package speed_ctrl
+
+import (
+	"errors"
+	"os"
+	"os/signal"
+	"runtime"
+	"syscall"
+	"time"
+
+	"amuz.es/src/infra/cpu_ctrl/daemon"
+	"amuz.es/src/infra/cpu_ctrl/logger"
+	"amuz.es/src/infra/cpu_ctrl/processor"
+	"fmt"
+	"os/exec"
+	"amuz.es/src/infra/cpu_ctrl/pid"
+	"amuz.es/src/infra/cpu_ctrl/util"
+)
+
+var (
+	log = logger.NewLogger("speed_ctrl")
+)
+
+
+func TempetureControl(
+	handler util.Handler,
+	processors []processor.Processor,
+) {
+	defer handler.DecreaseWait()
+	var (
+		P, I, D          = 1.5, 0.4, 2.0
+		SetPoint         = 38.0
+		SampleTime       = time.Second
+		maxNoob, minNoob = 0x64, 0x4
+		WindupGuard      = float64(maxNoob - minNoob)
+	)
+
+	noobs := make([]int, processorCount)
+
+	controllers := make([]pid.Controller, 0, processorCount)
+	for i := 0; i < processorCount; i++ {
+		controller := pid.New(P, I, D)
+		controller.SetSetPoint(SetPoint)
+		controller.SetSampleTime(SampleTime)
+		controller.SetWindupGuard(WindupGuard)
+		controllers = append(controllers, controller)
+	}
+
+	for {
+		select {
+		case change := <-notifier:
+			controller := controllers[change.Id()]
+			adj_noob := int(-controller.Update(change.Tempeture()))
+			if adj_noob < minNoob {
+				adj_noob = minNoob
+			} else if adj_noob > maxNoob {
+				adj_noob = maxNoob
+			}
+			if noobs[change.Id()] == adj_noob {
+				continue
+			}
+			noobs[change.Id()] = adj_noob
+			log.Printf("Processor %d fan 0x%x\n", change.Id, adj_noob)
+
+			args := make([]string, 0)
+			args = append(args,
+				"raw",
+				"0x3a", "0x01",
+			)
+			for _, item := range noobs {
+				args = append(args, fmt.Sprintf("0x%x", item))
+			}
+			args = append(args,
+				"0x0", "0x0", "0x0", "0x0", "0x0", "0x0",
+			)
+			cmd := exec.Command("ipmitool", args...)
+			if err := cmd.Run(); err != nil {
+				errorChan <- err
+				return
+			}
+		case <-ctx.Done():
+			return
+		}
+	}
+}
diff --git a/util/handler.go b/util/handler.go
new file mode 100644
index 0000000..76c18c2
--- /dev/null
+++ b/util/handler.go
@@ -0,0 +1,54 @@
+package util
+
+import (
+	"sync"
+	"context"
+	"amuz.es/src/infra/cpu_ctrl/logger"
+)
+
+var (
+	log = logger.NewLogger("util")
+)
+
+type handler struct {
+	errorChan chan error
+	ctx       context.Context
+	canceler  context.CancelFunc
+	waiter    *sync.WaitGroup
+}
+
+type Handler interface {
+	NotifyError(err error)
+	Error() <-chan error
+	Done() <-chan struct{}
+	GracefullWait()
+	IncreaseWait()
+	DecreaseWait()
+}
+
+func NewHandler() Handler {
+	ctx, canceler := context.WithCancel(context.Background())
+	return &handler{
+		ctx:       ctx,
+		canceler:  canceler,
+		waiter:    &sync.WaitGroup{},
+		errorChan: make(chan error),
+	}
+}
+
+func (h *handler) NotifyError(err error) { h.errorChan <- err }
+func (h *handler) Error() <-chan error   { return h.errorChan }
+func (h *handler) Done() <-chan struct{} { return h.ctx.Done() }
+func (h *handler) GracefullWait() {
+	if h.ctx.Err() == nil {
+		h.canceler()
+	}
+	h.waiter.Wait()
+	close(h.errorChan)
+	
+	for remainError := range h.errorChan {
+		log.Errorf("%s", remainError)
+	}
+}
+func (h *handler) IncreaseWait() { h.waiter.Add(1) }
+func (h *handler) DecreaseWait() { h.waiter.Done() }