diff --git a/metrics/docker.go b/connector/collector/docker.go
similarity index 90%
rename from metrics/docker.go
rename to connector/collector/docker.go
index 8f11b51..10e4425 100644
--- a/metrics/docker.go
+++ b/connector/collector/docker.go
@@ -1,16 +1,17 @@
-package metrics
+package collector
 
 import (
+	"github.com/bcicen/ctop/metrics"
 	api "github.com/fsouza/go-dockerclient"
 )
 
 // Docker collector
 type Docker struct {
-	Metrics
+	metrics.Metrics
 	id         string
 	client     *api.Client
 	running    bool
-	stream     chan Metrics
+	stream     chan metrics.Metrics
 	done       chan bool
 	lastCpu    float64
 	lastSysCpu float64
@@ -18,7 +19,7 @@ type Docker struct {
 
 func NewDocker(client *api.Client, id string) *Docker {
 	return &Docker{
-		Metrics: Metrics{},
+		Metrics: metrics.Metrics{},
 		id:      id,
 		client:  client,
 	}
@@ -26,7 +27,7 @@ func NewDocker(client *api.Client, id string) *Docker {
 
 func (c *Docker) Start() {
 	c.done = make(chan bool)
-	c.stream = make(chan Metrics)
+	c.stream = make(chan metrics.Metrics)
 	stats := make(chan *api.Stats)
 
 	go func() {
@@ -60,7 +61,7 @@ func (c *Docker) Running() bool {
 	return c.running
 }
 
-func (c *Docker) Stream() chan Metrics {
+func (c *Docker) Stream() chan metrics.Metrics {
 	return c.stream
 }
 
diff --git a/connector/collector/main.go b/connector/collector/main.go
new file mode 100644
index 0000000..c7b98be
--- /dev/null
+++ b/connector/collector/main.go
@@ -0,0 +1,21 @@
+package collector
+
+import (
+	"math"
+
+	"github.com/bcicen/ctop/logging"
+)
+
+var log = logging.Init()
+
+func round(num float64) int {
+	return int(num + math.Copysign(0.5, num))
+}
+
+// return rounded percentage
+func percent(val float64, total float64) int {
+	if total <= 0 {
+		return 0
+	}
+	return round((val / total) * 100)
+}
diff --git a/metrics/mock.go b/connector/collector/mock.go
similarity index 81%
rename from metrics/mock.go
rename to connector/collector/mock.go
index 0cb47fd..9d8dadd 100644
--- a/metrics/mock.go
+++ b/connector/collector/mock.go
@@ -1,16 +1,18 @@
 // +build !release
 
-package metrics
+package collector
 
 import (
 	"math/rand"
 	"time"
+
+	"github.com/bcicen/ctop/metrics"
 )
 
 // Mock collector
 type Mock struct {
-	Metrics
-	stream     chan Metrics
+	metrics.Metrics
+	stream     chan metrics.Metrics
 	done       bool
 	running    bool
 	aggression int64
@@ -18,7 +20,7 @@ type Mock struct {
 
 func NewMock(a int64) *Mock {
 	c := &Mock{
-		Metrics:    Metrics{},
+		Metrics:    metrics.Metrics{},
 		aggression: a,
 	}
 	c.MemLimit = 2147483648
@@ -31,7 +33,7 @@ func (c *Mock) Running() bool {
 
 func (c *Mock) Start() {
 	c.done = false
-	c.stream = make(chan Metrics)
+	c.stream = make(chan metrics.Metrics)
 	go c.run()
 }
 
@@ -39,7 +41,7 @@ func (c *Mock) Stop() {
 	c.done = true
 }
 
-func (c *Mock) Stream() chan Metrics {
+func (c *Mock) Stream() chan metrics.Metrics {
 	return c.stream
 }
 
diff --git a/metrics/proc.go b/connector/collector/proc.go
similarity index 98%
rename from metrics/proc.go
rename to connector/collector/proc.go
index 457585f..ce6aee5 100644
--- a/metrics/proc.go
+++ b/connector/collector/proc.go
@@ -1,4 +1,4 @@
-package metrics
+package collector
 
 import (
 	linuxproc "github.com/c9s/goprocinfo/linux"
diff --git a/metrics/runc.go b/connector/collector/runc.go
similarity index 91%
rename from metrics/runc.go
rename to connector/collector/runc.go
index 44188bb..b12d325 100644
--- a/metrics/runc.go
+++ b/connector/collector/runc.go
@@ -1,18 +1,19 @@
-package metrics
+package collector
 
 import (
 	"time"
 
+	"github.com/bcicen/ctop/metrics"
 	"github.com/opencontainers/runc/libcontainer"
 	"github.com/opencontainers/runc/libcontainer/cgroups"
 )
 
 // Runc collector
 type Runc struct {
-	Metrics
+	metrics.Metrics
 	id         string
 	libc       libcontainer.Container
-	stream     chan Metrics
+	stream     chan metrics.Metrics
 	done       bool
 	running    bool
 	interval   int // collection interval, in seconds
@@ -22,7 +23,7 @@ type Runc struct {
 
 func NewRunc(libc libcontainer.Container) *Runc {
 	c := &Runc{
-		Metrics:  Metrics{},
+		Metrics:  metrics.Metrics{},
 		id:       libc.ID(),
 		libc:     libc,
 		interval: 1,
@@ -36,7 +37,7 @@ func (c *Runc) Running() bool {
 
 func (c *Runc) Start() {
 	c.done = false
-	c.stream = make(chan Metrics)
+	c.stream = make(chan metrics.Metrics)
 	go c.run()
 }
 
@@ -44,7 +45,7 @@ func (c *Runc) Stop() {
 	c.done = true
 }
 
-func (c *Runc) Stream() chan Metrics {
+func (c *Runc) Stream() chan metrics.Metrics {
 	return c.stream
 }
 
diff --git a/connector/docker.go b/connector/docker.go
index fcbf9cd..3e7e5a4 100644
--- a/connector/docker.go
+++ b/connector/docker.go
@@ -6,8 +6,8 @@ import (
 	"strings"
 	"sync"
 
+	"github.com/bcicen/ctop/connector/collector"
 	"github.com/bcicen/ctop/container"
-	"github.com/bcicen/ctop/metrics"
 	api "github.com/fsouza/go-dockerclient"
 )
 
@@ -128,7 +128,7 @@ func (cm *Docker) MustGet(id string) *container.Container {
 	// append container struct for new containers
 	if !ok {
 		// create collector
-		collector := metrics.NewDocker(cm.client, id)
+		collector := collector.NewDocker(cm.client, id)
 		// create container
 		c = container.New(id, collector)
 		cm.lock.Lock()
diff --git a/connector/mock.go b/connector/mock.go
index fdf4073..daecc3e 100644
--- a/connector/mock.go
+++ b/connector/mock.go
@@ -7,8 +7,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/bcicen/ctop/connector/collector"
 	"github.com/bcicen/ctop/container"
-	"github.com/bcicen/ctop/metrics"
 	"github.com/jgautheron/codename-generator"
 	"github.com/nu7hatch/gouuid"
 )
@@ -39,7 +39,7 @@ func (cs *Mock) Init() {
 }
 
 func (cs *Mock) makeContainer(aggression int64) {
-	collector := metrics.NewMock(aggression)
+	collector := collector.NewMock(aggression)
 	c := container.New(makeID(), collector)
 	c.SetMeta("name", makeName())
 	c.SetState(makeState())
diff --git a/connector/runc.go b/connector/runc.go
index d67e103..b983571 100644
--- a/connector/runc.go
+++ b/connector/runc.go
@@ -8,8 +8,8 @@ import (
 	"sync"
 	"time"
 
+	"github.com/bcicen/ctop/connector/collector"
 	"github.com/bcicen/ctop/container"
-	"github.com/bcicen/ctop/metrics"
 	"github.com/opencontainers/runc/libcontainer"
 	"github.com/opencontainers/runc/libcontainer/cgroups/systemd"
 )
@@ -170,7 +170,7 @@ func (cm *Runc) MustGet(id string) *container.Container {
 		libc := cm.GetLibc(id)
 
 		// create collector
-		collector := metrics.NewRunc(libc)
+		collector := collector.NewRunc(libc)
 
 		// create container
 		c = container.New(id, collector)
diff --git a/metrics/main.go b/metrics/main.go
index 6ed90ba..8048122 100644
--- a/metrics/main.go
+++ b/metrics/main.go
@@ -1,13 +1,5 @@
 package metrics
 
-import (
-	"math"
-
-	"github.com/bcicen/ctop/logging"
-)
-
-var log = logging.Init()
-
 type Metrics struct {
 	CPUUtil      int
 	NetTx        int64
@@ -39,15 +31,3 @@ type Collector interface {
 	Start()
 	Stop()
 }
-
-func round(num float64) int {
-	return int(num + math.Copysign(0.5, num))
-}
-
-// return rounded percentage
-func percent(val float64, total float64) int {
-	if total <= 0 {
-		return 0
-	}
-	return round((val / total) * 100)
-}