From a8bcc109a9bd0c66acf84bfaaf3ff3f67b0abe2c Mon Sep 17 00:00:00 2001
From: Nicolas Mowen <nickmowen213@gmail.com>
Date: Fri, 17 Oct 2025 07:06:41 -0600
Subject: [PATCH] Add support for Intel NPU stats (#20542)

---
 frigate/stats/util.py    |  5 +++++
 frigate/util/services.py | 34 ++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/frigate/stats/util.py b/frigate/stats/util.py
index 1f92ffbe0..cfc5ae42b 100644
--- a/frigate/stats/util.py
+++ b/frigate/stats/util.py
@@ -25,6 +25,7 @@ from frigate.util.services import (
     get_intel_gpu_stats,
     get_jetson_stats,
     get_nvidia_gpu_stats,
+    get_openvino_npu_stats,
     get_rockchip_gpu_stats,
     get_rockchip_npu_stats,
     is_vaapi_amd_driver,
@@ -247,6 +248,10 @@ async def set_npu_usages(config: FrigateConfig, all_stats: dict[str, Any]) -> No
             # Rockchip NPU usage
             rk_usage = get_rockchip_npu_stats()
             stats["rockchip"] = rk_usage
+        elif detector.type == "openvino" and detector.device == "NPU":
+            # OpenVINO NPU usage
+            ov_usage = get_openvino_npu_stats()
+            stats["openvino"] = ov_usage
 
     if stats:
         all_stats["npu_usages"] = stats
diff --git a/frigate/util/services.py b/frigate/util/services.py
index ed21e7b00..587794990 100644
--- a/frigate/util/services.py
+++ b/frigate/util/services.py
@@ -9,6 +9,7 @@ import resource
 import shutil
 import signal
 import subprocess as sp
+import time
 import traceback
 from datetime import datetime
 from typing import Any, List, Optional, Tuple
@@ -388,6 +389,39 @@ def get_intel_gpu_stats(intel_gpu_device: Optional[str]) -> Optional[dict[str, s
         return results
 
 
+def get_openvino_npu_stats() -> Optional[dict[str, str]]:
+    """Get NPU stats using openvino."""
+    NPU_RUNTIME_PATH = "/sys/devices/pci0000:00/0000:00:0b.0/power/runtime_active_time"
+
+    try:
+        with open(NPU_RUNTIME_PATH, "r") as f:
+            initial_runtime = float(f.read().strip())
+
+        initial_time = time.time()
+
+        # Sleep for 1 second to get an accurate reading
+        time.sleep(1.0)
+
+        # Read runtime value again
+        with open(NPU_RUNTIME_PATH, "r") as f:
+            current_runtime = float(f.read().strip())
+
+        current_time = time.time()
+
+        # Calculate usage percentage
+        runtime_diff = current_runtime - initial_runtime
+        time_diff = (current_time - initial_time) * 1000.0  # Convert to milliseconds
+
+        if time_diff > 0:
+            usage = min(100.0, max(0.0, (runtime_diff / time_diff * 100.0)))
+        else:
+            usage = 0.0
+
+        return {"npu": f"{round(usage, 2)}", "mem": "-"}
+    except (FileNotFoundError, PermissionError, ValueError):
+        return None
+
+
 def get_rockchip_gpu_stats() -> Optional[dict[str, str]]:
     """Get GPU stats using rk."""
     try: