Reduce lists of temps in CPU graph

This helps highlight the changes from low and high CPU loads.

scripts/wk/graph.py

@@ -45,6 +45,23 @@ THRESH_GREAT =        750 * 1024**2
 
 
 # Functions
+def reduce_cpu_temp_list(list_of_temps, factor=5, start=30) -> list[float]:
+  """Reduce temperature list by averaging adjacent values.
+
+  NOTE: This only averages values after the amount defined by start.
+  NOTE 2: If the last group is less than the factor it is simply dropped.
+  """
+  new_list = list_of_temps[:start]
+  list_of_temps = list_of_temps[start:]
+  while list_of_temps:
+    group = list_of_temps[:factor]
+    list_of_temps = list_of_temps[factor:]
+    if len(group) < factor:
+      continue
+    new_list.append(sum(group)/factor)
+  return new_list
+
+
 def export_cpu_graph(cpu_description, log_dir, sensor_history):
   """Exports PNG graph using matplotlib."""
   lines = {}
@@ -66,6 +83,8 @@ def export_cpu_graph(cpu_description, log_dir, sensor_history):
     for adapter in sensor_data.get('CPUTemps', {}).values():
       for source, data in adapter.items():
         y_values = data['Temps']
+        if run_label in ('Sysbench', 'Prime95'):
+          y_values = reduce_cpu_temp_list(y_values)
         all_run_temps.extend(y_values)
         run_length = max(run_length, len(y_values))
         if source not in lines:
@@ -89,18 +108,25 @@ def export_cpu_graph(cpu_description, log_dir, sensor_history):
     layout='constrained',
     )
   ax.set_title(cpu_description)
+  ax.set_xticks([])
   for label, data in lines.items():
     ax.plot(data, label=label)
   #prev_label = 'Idle' # Always skip Idle
-  #for offset, label in offset_labels:
-  #  if label == prev_label:
-  #    continue
-  #  color = 'r' if label in ('Prime95', 'Sysbench') else 'b'
-  #  if label == 'Cooldown':
-  #    label = ''
-  #  ax.axvline(x=offset, color=color, label=label)
-  #  #ax.axvline(x=offset, color=color)
-  #  prev_label = label
+  prev_label = ''
+  for offset, label in offset_labels:
+    color = 'grey'
+    if label == prev_label:
+      continue
+    if label == 'Sysbench':
+      color = 'orange'
+    if label == 'Prime95':
+      color = 'red'
+    if label == 'Cooldown':
+      color = 'blue'
+      label = ''
+    ax.axvline(x=offset, color=color, label=label, linestyle='--')
+    #ax.axvline(x=offset, color=color)
+    prev_label = label
   for run_label, data in run_averages.items():
     if run_label not in ('Prime95', 'Sysbench'):
       continue
@@ -108,7 +134,7 @@ def export_cpu_graph(cpu_description, log_dir, sensor_history):
       y = data['Temp'],
       color = 'orange' if run_label == 'Sysbench' else 'red',
       label = f'{run_label} (Avg)',
-      linestyle = '--',
+      linestyle = ':',
       )
   ax.legend()
   pyplot.savefig(out_path)