diff --git a/atf.inc.php b/atf.inc.php
index 2cdcff8..73f1011 100644
--- a/atf.inc.php
+++ b/atf.inc.php
@@ -396,22 +396,6 @@ function _multi_curl_async($ch, $get_content) : Amp\Promise
   });
 }
 
-function device_screen(string $atf_host, string $device)
-{
-  $screen_file_name = '%{dir}%/'.uniqid("screen_").'.png';
-  try
-  {
-    host_exec($atf_host, "%{adb}% -s $device exec-out screencap -p > $screen_file_name");
-  }
-  catch(Exception $e)
-  {
-    return false;
-  }
-  $data = host_get_file($atf_host, $screen_file_name);
-  host_exec($atf_host, "rm -rf $screen_file_name");
-  return $data;
-}
-
 function del_external_files_async(string $atf_host, string $device, array $external_files) : Amp\Promise
 {
   return Amp\call(function() use($atf_host, $device, $external_files) {
@@ -483,68 +467,3 @@ function _filter_error_logs(array &$lines)
   $lines = $filtered;
 }
 
-function device_pss_async(string $atf_host, string $device) : Amp\Promise
-{
-  return Amp\call(function() use($atf_host, $device) {
-    $res = yield device_mem_async($atf_host, $device);
-    return $res['total'];
-  });
-}
-
-function device_mem_async(string $atf_host, string $device) : Amp\Promise
-{
-  return Amp\call(function() use($atf_host, $device) {
-    list($code, $lines) = yield host_exec_async($atf_host, "%{adb}% -s $device shell dumpsys meminfo -s %{package_id}%", DEPLOY_OPT_ERR_OK, 20);
-
-    $res = array(
-      'total'     => 0,
-      'native'    => 0,
-      'java'      => 0,
-      'system'    => 0,
-      'graphics'  => 0,
-    );
-
-    if($code !== 0)
-      return $res;
-
-    foreach($lines as $idx => $line)
-    {
-      $items = preg_split('/\s+/', trim($line));
-      if($items && $items[0] === "TOTAL:")
-        $res['total'] = intval($items[1]);
-      else if($items && $items[0] === "TOTAL" && $items[1] === "PSS:")
-        $res['total'] = intval($items[2]);
-      else if($items && $items[0] === "Native" && $items[1] === "Heap:")
-        $res['native'] = intval($items[2]);
-      else if($items && $items[0] === "Java" && $items[1] === "Heap:")
-        $res['java'] = intval($items[2]);
-      else if($items && $items[0] === "System:")
-        $res['system'] = intval($items[1]);
-      else if($items && $items[0] === "Graphics:")
-        $res['graphics'] = intval($items[1]);
-    }
-
-    return $res;
-  });
-}
-
-function device_temperature_async(string $atf_host, string $device) : Amp\Promise
-{
-  return Amp\call(function() use($atf_host, $device) {
-    //NOTE: on current devices 16 thermal zone is responsible for GPU temperature probing
-    list($code, $lines) = yield host_exec_async($atf_host, "%{adb}% -s $device shell cat /sys/class/thermal/thermal_zone16/temp", DEPLOY_OPT_ERR_OK, 1);
-
-    if($code !== 0)
-      return 0;
-
-    foreach($lines as $idx => $line)
-    {
-      $line = trim($line);
-      if(!$line)
-        continue;
-      return intval($line);
-    }
-
-    return 0;
-  });
-}
diff --git a/device.inc.php b/device.inc.php
index 9d5f281..0bb0531 100644
--- a/device.inc.php
+++ b/device.inc.php
@@ -160,3 +160,141 @@ class CachedDevices implements IDevicePool
   }
 }
 
+function device_screen(string $atf_host, string $device)
+{
+  $screen_file_name = '%{dir}%/'.uniqid("screen_").'.png';
+  try
+  {
+    host_exec($atf_host, "%{adb}% -s $device exec-out screencap -p > $screen_file_name");
+  }
+  catch(Exception $e)
+  {
+    return false;
+  }
+  $data = host_get_file($atf_host, $screen_file_name);
+  host_exec($atf_host, "rm -rf $screen_file_name");
+  return $data;
+}
+
+function device_pss_async(string $atf_host, string $device) : Amp\Promise
+{
+  return Amp\call(function() use($atf_host, $device) {
+    $res = yield device_mem_async($atf_host, $device);
+    return $res['total'];
+  });
+}
+
+function device_mem_async(string $atf_host, string $device) : Amp\Promise
+{
+  return Amp\call(function() use($atf_host, $device) {
+    list($code, $lines) = yield host_exec_async($atf_host, "%{adb}% -s $device shell dumpsys meminfo -s %{package_id}%", DEPLOY_OPT_ERR_OK, 20);
+
+    $res = array(
+      'total'     => 0,
+      'native'    => 0,
+      'java'      => 0,
+      'system'    => 0,
+      'graphics'  => 0,
+    );
+
+    if($code !== 0)
+      return $res;
+
+    foreach($lines as $idx => $line)
+    {
+      $items = preg_split('/\s+/', trim($line));
+      if($items && $items[0] === "TOTAL:")
+        $res['total'] = intval($items[1]);
+      else if($items && $items[0] === "TOTAL" && $items[1] === "PSS:")
+        $res['total'] = intval($items[2]);
+      else if($items && $items[0] === "Native" && $items[1] === "Heap:")
+        $res['native'] = intval($items[2]);
+      else if($items && $items[0] === "Java" && $items[1] === "Heap:")
+        $res['java'] = intval($items[2]);
+      else if($items && $items[0] === "System:")
+        $res['system'] = intval($items[1]);
+      else if($items && $items[0] === "Graphics:")
+        $res['graphics'] = intval($items[1]);
+    }
+
+    return $res;
+  });
+}
+
+function device_cpuinfo_async(string $atf_host, string $device) : Amp\Promise
+{
+  return Amp\call(function() use($atf_host, $device) {
+    list($code, $lines) = yield host_exec_async($atf_host, "%{adb}% -s $device shell dumpsys cpuinfo -s %{package_id}%", DEPLOY_OPT_ERR_OK, 20);
+
+    $res = array(
+      'la1' => 0,
+      'la5' => 0,
+      'la15' => 0
+    );
+
+    if($code !== 0 || count($lines) == 0)
+      return $res;
+
+    foreach($lines as $idx => $line)
+    {
+      if(strpos($line, 'Load:') !== false)
+      {
+        $items = explode(':', $line);
+        $sub_items = explode('/', $items[1]);
+
+        $res['la1'] = floatval(trim($sub_items[0]));
+        $res['la5'] = floatval(trim($sub_items[1]));
+        $res['la15'] = floatval(trim($sub_items[2]));
+
+        break;
+      }
+    }
+
+    return $res;
+  });
+}
+
+function device_cputop_async(string $atf_host, string $device) : Amp\Promise
+{
+  return Amp\call(function() use($atf_host, $device) {
+    list($code, $lines) = yield host_exec_async($atf_host, "%{adb}% -s $device shell top -q -o'%CPU,PID,CMDLINE' -n1 -s1 | grep -w %{package_id}%", DEPLOY_OPT_ERR_OK, 20);
+
+    $cpu = 0;
+
+    if($code !== 0 || count($lines) == 0)
+      return $cpu;
+
+    foreach($lines as $idx => $line)
+    {
+      $items = preg_split('/\s+/', trim($line));
+      if(count($items) > 0)
+      {
+        $cpu = intval($items[0]);
+        break;
+      }
+    }
+
+    return $cpu;
+  });
+}
+
+function device_temperature_async(string $atf_host, string $device) : Amp\Promise
+{
+  return Amp\call(function() use($atf_host, $device) {
+    //NOTE: on current devices 16 thermal zone are responsible for GPU temperature probing
+    list($code, $lines) = yield host_exec_async($atf_host, "%{adb}% -s $device shell cat /sys/class/thermal/thermal_zone16/temp", DEPLOY_OPT_ERR_OK, 1);
+
+    if($code !== 0)
+      return 0;
+
+    foreach($lines as $idx => $line)
+    {
+      $line = trim($line);
+      if(!$line)
+        continue;
+      return intval($line);
+    }
+
+    return 0;
+  });
+}
diff --git a/session.inc.php b/session.inc.php
index 54843b5..94f0fc9 100644
--- a/session.inc.php
+++ b/session.inc.php
@@ -26,6 +26,7 @@ class SessionConfig
   public IMChan $im_qa;
   public IStatsSender $stats;
   public string $device_replay_path = 'replay.txt';
+  public array $stats_event_listeners = array();
 
   function __construct()
   {
@@ -40,6 +41,11 @@ class SessionConfig
     $this->atf_host = 'atf';
     taskman\deploy_declare_node($this->atf_host, $settings);
   }
+
+  function registerStatsEventListener(callable $hook)
+  {
+    $this->stats_event_listeners[] = $hook;
+  }
 }
 
 class Session
@@ -174,6 +180,7 @@ class Session
     if($this->conf->adb_reboot)
       adb_reboot($this->conf->atf_host);
 
+    //TODO: should not be here
     $this->trySendApkStatsEvent($this->apk_installer->getSize());
 
     $all_tasks = $this->_getAllTasks();
@@ -387,9 +394,10 @@ class Session
       $table = $data['table'];
       unset($data['table']);
 
-      $data = yield $this->inflateMissingStats($task, $table, $data);
+      $data = yield $this->applyStatsEventsListeners($task, $table, $data);
 
-      $this->trySendStats($task, $table, $data);
+      if($data !== null)
+        $this->trySendStats($task, $table, $data);
     }
     catch(Exception $e)
     {
@@ -399,27 +407,12 @@ class Session
     });
   }
 
-  //TODO: make it more flexible via plugin alike system?
-  function inflateMissingStats(Task $task, string $table, array $data) : Amp\Promise
+  function applyStatsEventsListeners(Task $task, string $table, array $data) : Amp\Promise
   {
     return Amp\call(function() use($task, $table, $data) {
-      //NOTE: filling memory usage if it's not set
-      if(isset($data['deviceMemoryUsage']) && $data['deviceMemoryUsage'] === '')
-      {
-        $mem = yield device_mem_async($this->conf->atf_host, $task->device);
-        $data['deviceMemoryUsage'] = $mem['total'];
-        if($table === 'device_memory')
-        {
-          $data['deviceMemoryUsageNative'] = $mem['native'];
-          $data['deviceMemoryUsageSystem'] = $mem['system'];
-          $data['deviceMemoryUsageJava'] = $mem['java'];
-          $data['deviceMemoryUsageGraphics'] = $mem['graphics'];
-        }
-      }
 
-      //NOTE: filling CPU temperature
-      if(isset($data['event']) && $data['event'] == 'cpuTemp')
-        $data['value'] = yield device_temperature_async($this->conf->atf_host, $task->device);
+      foreach($this->conf->stats_event_listeners as $hook)
+        $data = yield $hook($this, $task, $table, $data);
 
       return $data;
     });
@@ -429,6 +422,7 @@ class Session
   {
     try
     {
+      $data = array();
       $data['guid'] = $this->guid; 
       $data['time'] = time(); 
       $data['version'] = $this->conf->proj_version;