log nvme temp (#22296)

* log nvme temp

* fix high cpu

Co-authored-by: Comma Device <device@comma.ai>

selfdrive/hardware/base.py

@@ -1,3 +1,5 @@
+import json
+import subprocess
 from abc import abstractmethod
 from collections import namedtuple
 
@@ -18,6 +20,17 @@ class HardwareBase:
     except Exception:
       return default
 
+  @staticmethod
+  def get_nvme_temps():
+    ret = []
+    try:
+      out = subprocess.check_output("sudo smartctl -aj /dev/nvme0", shell=True)
+      dat = json.loads(out)
+      ret = list(map(int, dat["nvme_smart_health_information_log"]["temperature_sensors"]))
+    except Exception:
+      pass
+    return ret
+
   @abstractmethod
   def reboot(self, reason=None):
     pass

selfdrive/thermald/thermald.py

@@ -178,6 +178,7 @@ def thermald_thread():
   network_info = None
   modem_version = None
   registered_count = 0
+  nvme_temps = None
 
   current_filter = FirstOrderFilter(0., CURRENT_TAU, DT_TRML)
   temp_filter = FirstOrderFilter(0., TEMP_TAU, DT_TRML)
@@ -258,12 +259,13 @@ def thermald_thread():
           params.clear_all(ParamKeyType.CLEAR_ON_PANDA_DISCONNECT)
       pandaState_prev = pandaState
 
-    # get_network_type is an expensive call. update every 10s
+    # these are expensive calls. update every 10s
     if (count % int(10. / DT_TRML)) == 0:
       try:
         network_type = HARDWARE.get_network_type()
         network_strength = HARDWARE.get_network_strength(network_type)
         network_info = HARDWARE.get_network_info()  # pylint: disable=assignment-from-none
+        nvme_temps = HARDWARE.get_nvme_temps()
 
         # Log modem version once
         if modem_version is None:
@@ -292,6 +294,8 @@ def thermald_thread():
     msg.deviceState.networkStrength = network_strength
     if network_info is not None:
       msg.deviceState.networkInfo = network_info
+    if nvme_temps is not None:
+      msg.deviceState.nvmeTempC = nvme_temps
 
     msg.deviceState.batteryPercent = HARDWARE.get_battery_capacity()
     msg.deviceState.batteryCurrent = HARDWARE.get_battery_current()