Arm backend: Update minimal example notebook (#11149)

cc @digantdesai @freddan80 @per @zingo @oscarandersson8218

Signed-off-by: Adrian Lundell <adrian.lundell@arm.com>

Author: AdrianLundell

examples/arm/ethos_u_minimal_example.ipynb

@@ -137,14 +137,14 @@
    "metadata": {},
    "outputs": [],
    "source": [
+    "import os\n",
     "from executorch.backends.arm.ethosu_partitioner import EthosUPartitioner\n",
     "from executorch.exir import (\n",
     "    EdgeCompileConfig,\n",
     "    ExecutorchBackendConfig,\n",
     "    to_edge_transform_and_lower,\n",
     ")\n",
     "from executorch.extension.export_util.utils import save_pte_program\n",
-    "import platform\n",
     "\n",
     "# Create partitioner from compile spec\n",
     "partitioner = EthosUPartitioner(compile_spec)\n",
@@ -158,15 +158,6 @@
     "            ),\n",
     "        )\n",
     "\n",
-    "# Load quantization ops library\n",
-    "os_aot_lib_names = {\"Darwin\" : \"libquantized_ops_aot_lib.dylib\",\n",
-    "                \"Linux\"  : \"libquantized_ops_aot_lib.so\",\n",
-    "                \"Windows\": \"libquantized_ops_aot_lib.dll\"}\n",
-    "aot_lib_name = os_aot_lib_names[platform.system()]\n",
-    "\n",
-    "libquantized_ops_aot_lib_path = os.path.join(et_dir, \"cmake-out-aot-lib\", \"kernels\", \"quantized\", aot_lib_name)\n",
-    "torch.ops.load_library(libquantized_ops_aot_lib_path)\n",
-    "\n",
     "# Convert edge program to executorch\n",
     "executorch_program_manager = edge_program_manager.to_executorch(\n",
     "            config=ExecutorchBackendConfig(extract_delegate_segments=False)\n",
@@ -175,6 +166,7 @@
     "executorch_program_manager.exported_program().module().print_readable()\n",
     "\n",
     "# Save pte file\n",
+    "cwd_dir = os.getcwd()\n",
     "pte_base_name = \"simple_example\"\n",
     "pte_name = pte_base_name + \".pte\"\n",
     "pte_path = os.path.join(cwd_dir, pte_name)\n",
@@ -200,13 +192,20 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "# Build executorch\n",
+    "import subprocess\n",
+    "\n",
+    "# Setup paths\n",
+    "et_dir = os.path.join(cwd_dir, \"..\", \"..\")\n",
+    "et_dir = os.path.abspath(et_dir)\n",
+    "script_dir = os.path.join(et_dir, \"backends\", \"arm\", \"scripts\")\n",
+    "\n",
+    "# Cross-compile executorch \n",
     "subprocess.run(os.path.join(script_dir, \"build_executorch.sh\"), shell=True, cwd=et_dir)\n",
     "\n",
-    "# Build portable kernels\n",
+    "# Cross-compile portable kernels\n",
     "subprocess.run(os.path.join(script_dir, \"build_portable_kernels.sh\"), shell=True, cwd=et_dir)\n",
     "\n",
-    "# Build executorch runner\n",
+    "# Cross-compile executorch runner\n",
     "args = f\"--pte={pte_path} --target={target}\"\n",
     "subprocess.run(os.path.join(script_dir, \"build_executor_runner.sh\") + \" \" + args, shell=True, cwd=et_dir)\n",
     "\n",
@@ -236,7 +235,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "venv",
+   "display_name": ".venv",
    "language": "python",
    "name": "python3"
   },