Release Vulpes OS 2.7-preview.24

tundra/tools/battery-idle-log.py

@@ -0,0 +1,49 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: MPL-2.0
+"""Low-overhead, read-only battery and thermal sampler for a RAM trial."""
+import json
+from pathlib import Path
+import time
+
+
+def values(directory, names):
+    result = {}
+    for name in names:
+        try:
+            result[name] = (directory / name).read_text().strip()
+        except OSError:
+            pass
+    return result
+
+
+def sample():
+    supplies = {}
+    for path in sorted(Path('/sys/class/power_supply').iterdir()):
+        supplies[path.name] = values(path, (
+            'type', 'status', 'online', 'capacity', 'current_now',
+            'voltage_now', 'power_now', 'charge_now', 'energy_now', 'temp'))
+    thermal = {}
+    for path in sorted(Path('/sys/class/thermal').glob('thermal_zone*')):
+        item = values(path, ('type', 'temp'))
+        if item:
+            thermal[path.name] = item
+    idle = {}
+    for path in sorted(Path('/sys/devices/system/cpu').glob('cpu[0-9]*/cpuidle/state*')):
+        item = values(path, ('name', 'time', 'usage', 'disable'))
+        if item:
+            idle[str(path.relative_to('/sys/devices/system/cpu'))] = item
+    return {'timeUnix': time.time(), 'timeMonotonic': time.monotonic(),
+            'powerSupplies': supplies, 'thermalZones': thermal, 'cpuIdle': idle}
+
+
+def main():
+    output = Path('/run/tundra/battery-idle.jsonl')
+    output.parent.mkdir(parents=True, exist_ok=True)
+    with output.open('a', buffering=1) as stream:
+        while True:
+            stream.write(json.dumps(sample(), separators=(',', ':')) + '\n')
+            time.sleep(30)
+
+
+if __name__ == '__main__':
+    main()