Python script for compare

validation/networks/pimcomp_models/README.md

@@ -0,0 +1,246 @@
+# PIMCOMP paper models
+
+This directory contains the four networks evaluated in
+[PIMCOMP: An End-to-End DNN Compiler for Processing-In-Memory Accelerators](https://arxiv.org/pdf/2411.09159):
+VGG-8, ResNet-18, ResNet-34, and GoogLeNet.
+
+See [RESULTS.md](RESULTS.md) for the current latency-only result status.
+
+## Models and provenance
+
+| Directory | Model | Input | Provenance |
+| --- | --- | --- | --- |
+| `resnet18/` | ResNet-18 v1 | `1x3x224x224` | Symlink to the complete ONNX Model Zoo model already present at `../resnetv2/depth_68/resnetv2_depth_68.onnx`. |
+| `resnet34/` | ResNet-34 v1 | `1x3x224x224` | [ONNX Model Zoo `resnet34-v1-7`](https://huggingface.co/onnxmodelzoo/resnet34-v1-7), with its symbolic batch fixed to 1 as PIMCOMP's frontend does. |
+| `googlenet/` | GoogLeNet | `1x3x224x224` | Unmodified [ONNX Model Zoo `googlenet-12`](https://huggingface.co/onnxmodelzoo/googlenet-12). |
+| `vgg8/` | VGG-8 reconstruction | `1x1x28x28` | Deterministic compiler workload with six convolution and two fully connected layers. |
+
+`googlenet/googlenet-12-no-softmax.onnx` is a derived latency model that
+exposes the original model's final FC logits (`loss3/classifier_1`) as its
+output. This matches PIMCOMP's instruction stream, which records but does not
+schedule the terminal `OP_SOFTMAX`. Keep `googlenet-12.onnx` for full-model
+functional validation.
+
+The PIMCOMP authors did not publish the ONNX checkpoints used by the paper.
+Running PIMCOMP's frontend on the three Model Zoo files above produces JSON
+graphs exactly equal to PIMCOMP-NN's bundled `resnet18.json`, `resnet34.json`,
+and `googlenet.json`.
+
+There is no VGG-8 artifact in the ONNX Model Zoo or any PIMCOMP-NN revision.
+The included VGG-8 therefore has deterministic random weights and is suitable
+for compiler and simulator comparison, not paper-accuracy reproduction. The
+paper also says that VGG-8 and ResNet-18 were trained on MNIST, while the
+published PIMCOMP graphs and ResNet Model Zoo artifacts use ImageNet shapes.
+
+Current SHA-256 checksums:
+
+```text
+788088b908e233d924c7c26b997e89ee861290c7bc56783a306e8201d79aac8f  resnet18/resnet18-v1-7.onnx
+c3231061d081bdd47884137b02134f85142752a39e87263c529cd14ed242b096  resnet34/resnet34-v1-7.onnx
+c99c507058eaf41de8723408fdda7db8325cb57f0a89f2ee07a716d6e963e14e  googlenet/googlenet-12.onnx
+a35bad96441efbee28699cb61d1656cca7f7281f14040cf01699c3d0cfd8b202  googlenet/googlenet-12-no-softmax.onnx
+396cdea21e5e7d02c3f26f14d22ef20975171702493f5c5e79b8e0d896e541ef  vgg8/vgg8-mnist-reconstructed.onnx
+```
+
+## Paper hardware profiles
+
+The files in `configs/` encode Table V's explicit resource parameters.
+
+| Config | Cores | Crossbars/core | Crossbar | Cell | PIMCOMP layout |
+| --- | ---: | ---: | --- | ---: | --- |
+| `arch-a.json` | 168 | 96 | `128x128` | 2-bit | `12x14` |
+| `arch-b.json` | 138 | 128 | `128x128` | 2-bit | `6x23` |
+| `arch-c.json` | 64 (16 chips x 4) | 8 | `512x1024` | 2-bit | flattened `8x8` |
+
+`adc_count` is 16, matching the paper's 16-bit fixed-point weight precision.
+The paper does not give a two-dimensional core topology for Arch-A/B, so the
+factorizations above preserve core count but cannot reproduce unpublished NoC
+placement details. Released PIMCOMP-NN has no chip-count field; Arch-C is
+therefore flattened to 64 cores and does not model chip boundaries.
+
+The remaining latency and power values come from PIMCOMP-NN's released default
+configuration. Consequently, instruction/resource comparisons are
+reproducible, but absolute paper power and energy numbers are not.
+
+## Build and validate the ONNX files
+
+From the Raptor repository root:
+
+```bash
+.venv/bin/python -m pip install numpy onnx onnxruntime onnxsim colorama
+cmake --build ./build_release
+cmake --build third_party/PIMCOMP-NN/build --target PIMCOMP-NN
+
+.venv/bin/python -c \
+  'from pathlib import Path; import onnx; [onnx.checker.check_model(onnx.load(p)) for p in Path("validation/networks/pimcomp_models").glob("*/*.onnx")]'
+```
+
+Do not build either project with `ninja` directly.
+
+## Compile with PIMCOMP
+
+PIMCOMP-NN reads `third_party/PIMCOMP-NN/config.json` directly. Back it up,
+select one paper profile, and restore it when the shell exits:
+
+```bash
+RAPTOR_ROOT=$PWD
+PIMCOMP="$RAPTOR_ROOT/third_party/PIMCOMP-NN"
+PAPER_MODELS="$RAPTOR_ROOT/validation/networks/pimcomp_models"
+CONFIG_BACKUP=$(mktemp)
+cp "$PIMCOMP/config.json" "$CONFIG_BACKUP"
+trap 'cp "$CONFIG_BACKUP" "$PIMCOMP/config.json"' EXIT
+cp "$PAPER_MODELS/configs/arch-a.json" "$PIMCOMP/config.json"
+```
+
+The Model Zoo files map exactly to PIMCOMP's bundled model names, so compile
+them directly:
+
+```bash
+cd "$PIMCOMP/build"
+
+# High-throughput mode; the paper evaluates batches of 128 samples.
+./PIMCOMP-NN -m=resnet18 -r=balance -p=batch -o=YES -v=YES -s=YES
+./PIMCOMP-NN -m=resnet34 -r=balance -p=batch -o=YES -v=YES -s=YES
+./PIMCOMP-NN -m=googlenet -r=balance -p=batch -o=YES -v=YES -s=YES
+
+# Low-latency mode; the paper uses batch size 1.
+./PIMCOMP-NN -m=resnet18 -r=balance -p=element -o=YES -v=YES -s=YES
+./PIMCOMP-NN -m=resnet34 -r=balance -p=element -o=YES -v=YES -s=YES
+./PIMCOMP-NN -m=googlenet -r=balance -p=element -o=YES -v=YES -s=YES
+```
+
+VGG-8 first needs PIMCOMP's JSON frontend. Use a temporary ONNX copy because
+the released frontend rewrites the input batch dimension in place:
+
+```bash
+cd /path/to/Raptor
+cp validation/networks/pimcomp_models/vgg8/vgg8-mnist-reconstructed.onnx /tmp/vgg8-pimcomp.onnx
+.venv/bin/python third_party/PIMCOMP-NN/frontend/frontend.py \
+  --model_path /tmp/vgg8-pimcomp.onnx \
+  --save_path third_party/PIMCOMP-NN/models/JSON/vgg8_paper_reconstructed.json
+
+cd third_party/PIMCOMP-NN/build
+./PIMCOMP-NN -m=vgg8_paper_reconstructed -r=balance -p=batch -o=YES -v=YES -s=YES
+./PIMCOMP-NN -m=vgg8_paper_reconstructed -r=balance -p=element -o=YES -v=YES -s=YES
+```
+
+Repeat after selecting `arch-b.json` and `arch-c.json`. All four models were
+compiled successfully in both modes with all three configs. The released
+random placement code occasionally segfaults; an unchanged retry succeeded in
+the observed cases.
+
+The paper's optimizer uses a genetic algorithm with population 200 and up to
+1000 iterations. Select it with `-r=GA` for optimizer studies. The released
+source keeps population 200 but sets `max_iteration = 3`, so reproducing the
+paper's optimization search also requires changing that value in
+`backend/GeneticAlgorithm.h`. GA allocates roughly 32 GB in its fast evaluator;
+use monolith below instead of reducing cores or crossbars when local RAM is
+insufficient.
+
+## Compare Raptor and PIMCOMP
+
+The comparison driver uses one random input and one native ONNX-MLIR reference,
+compiles both instruction streams, validates both through Raptor's Rust
+simulator, and writes Markdown and JSON reports.
+
+To reproduce the complete Arch-A latency experiment, use the serial experiment
+runner. It creates an isolated PIMCOMP build with population 200 and 1000 GA
+iterations, runs only the `element`/batch-1 latency pipeline, and invokes the
+comparison driver for one model at a time:
+
+```bash
+.venv/bin/python validation/tools/run_pimcomp_paper_latency.py \
+  --out-dir /tmp/raptor-pimcomp-paper-latency
+```
+
+Reports are written under `<out-dir>/<model>/comparison_report.{md,json}`.
+Use `--models vgg8` to run one model, `--resume` after an interruption, or
+`--dry-run` to inspect every command. The runner continues after a failed model
+so all reports are produced, then returns a nonzero status if any comparison
+failed.
+
+Arch-A low-latency example:
+
+```bash
+RAPTOR_ROOT=$PWD
+PIMCOMP="$RAPTOR_ROOT/third_party/PIMCOMP-NN"
+CONFIG_BACKUP=$(mktemp)
+cp "$PIMCOMP/config.json" "$CONFIG_BACKUP"
+trap 'cp "$CONFIG_BACKUP" "$PIMCOMP/config.json"' EXIT
+cp "$RAPTOR_ROOT/validation/networks/pimcomp_models/configs/arch-a.json" "$PIMCOMP/config.json"
+
+"$RAPTOR_ROOT/.venv/bin/python" "$RAPTOR_ROOT/validation/tools/compare_raptor_pimcomp.py" \
+  --model "$RAPTOR_ROOT/validation/networks/pimcomp_models/vgg8/vgg8-mnist-reconstructed.onnx" \
+  --out-dir /tmp/compare-vgg8-arch-a-ll \
+  --core-count 168 \
+  --crossbar-count 96 \
+  --crossbar-size 128 \
+  --mesh-rows 12 \
+  --mesh-cols 14 \
+  --pimsim-mode latency \
+  --pimcomp-pipeline element \
+  --fail-on-error
+```
+
+For Arch-A high throughput, use `--pimsim-mode throughput
+--pimcomp-pipeline batch`. For Arch-B, use 138 cores, 128 crossbars, a
+`6x23` mesh, and `configs/arch-b.json`.
+
+If only semantic and instruction comparison is required, add
+`--skip-pimsim-nn`. This exact VGG-8 Arch-A LL smoke test passed both semantic
+validations with maximum output differences below `5e-10`.
+
+Current Raptor status:
+
+- VGG-8, ResNet-18, fixed-batch ResNet-34, and GoogLeNet compile on Arch-A.
+- Use `googlenet-12-no-softmax.onnx` for the paper-matched latency comparison.
+  The original model's final `vsoftmax` is supported by Raptor's functional
+  simulator but not by `pimsim-nn`; PIMCOMP does not schedule that operation.
+- Raptor currently accepts one square `--crossbar-size`; Arch-C's rectangular
+  `512x1024` arrays can therefore be compiled by PIMCOMP but not compared
+  exactly with Raptor.
+
+Do not change the hardware profile to bypass either limitation; that would no
+longer be a paper-matched comparison.
+
+## Monolith fallback
+
+The local `monolith` SSH alias points to the high-memory host. Copy only this
+suite and the comparison driver; `-L` materializes the ResNet-18 symlink because
+the canonical `resnetv2/depth_68` file may not exist remotely:
+
+```bash
+REMOTE_REPO=/home/gmagnani/Project/Raptor
+rsync -azL validation/networks/pimcomp_models/ \
+  "monolith:$REMOTE_REPO/validation/networks/pimcomp_models/"
+rsync -az validation/tools/compare_raptor_pimcomp.py \
+  "monolith:$REMOTE_REPO/validation/tools/compare_raptor_pimcomp.py"
+rsync -az validation/tools/run_pimcomp_paper_latency.py \
+  "monolith:$REMOTE_REPO/validation/tools/run_pimcomp_paper_latency.py"
+rsync -az --exclude=.git --exclude=build --exclude=output \
+  third_party/PIMCOMP-NN/ \
+  "monolith:$REMOTE_REPO/third_party/PIMCOMP-NN/"
+```
+
+Then use the same commands over SSH:
+
+```bash
+ssh monolith
+cd /home/gmagnani/Project/Raptor
+
+# One-time setup if the repository virtual environment is absent.
+python3 -m venv .venv
+.venv/bin/python -m pip install numpy onnx onnxruntime onnxsim colorama
+
+# Run every latency comparison serially.
+.venv/bin/python validation/tools/run_pimcomp_paper_latency.py \
+  --out-dir /tmp/raptor-pimcomp-paper-latency
+```
+
+Copy reports back without transferring large compiler artifacts:
+
+```bash
+rsync -az --include='*/' --include='comparison_report.*' --exclude='*' \
+  monolith:/tmp/raptor-pimcomp-paper-latency/ \
+  /tmp/raptor-pimcomp-paper-latency/
+```

validation/networks/pimcomp_models/RESULTS.md

@@ -0,0 +1,33 @@
+# Raptor vs PIMCOMP latency results
+
+## GoogLeNet, Arch-A, low latency
+
+Measured with `googlenet-12-no-softmax.onnx`, batch 1, Raptor's best current
+schedule, and PIMCOMP's GA/element artifacts. Both instruction streams were
+simulated by the same `pimsim-nn` build using the complete Arch-A timing and
+precision configuration.
+
+| Compiler | Latency (ms) | Instructions | Sends | Receives | MVMUL |
+| --- | ---: | ---: | ---: | ---: | ---: |
+| Raptor | 1132.458315 | 77,717,248 | 29,115 | 29,115 | 157,158 |
+| PIMCOMP | 41.790450 | 3,398,070 | 110,334 | 110,334 | 113,639 |
+
+PIMCOMP is 27.10x faster in this latency simulation.
+
+Semantic validation did not pass the comparison driver's strict default
+tolerance: the maximum logit differences from the native ONNX reference were
+`0.01995039` for Raptor and `7.768404` for PIMCOMP. Treat these as performance
+results, not as a correctness-equivalent comparison.
+
+No throughput experiment was run.
+
+## Reproduce
+
+```bash
+.venv/bin/python validation/tools/run_pimcomp_paper_latency.py \
+  --out-dir /tmp/raptor-pimcomp-paper-latency \
+  --models googlenet
+```
+
+See [README.md](README.md) for model provenance, limitations, and monolith
+instructions.

validation/networks/pimcomp_models/configs/arch-a.json

@@ -0,0 +1,54 @@
+{
+  "chip_config": {
+    "core_config": {
+      "period": 1,
+      "matrix_config": {
+        "xbar_array_count": 96,
+        "period": 1,
+        "pipeline_mode": true,
+        "dac_resolution": 1,
+        "dac_count": 128,
+        "xbar_size": [128, 128],
+        "cell_precision": 2,
+        "xbar_latency": 7,
+        "xbar_read_power": 22.24,
+        "sample_hold_latency_cycle": 1,
+        "adc_resolution": 8,
+        "adc_latency_cycle": 20,
+        "adc_static_power": 0.322,
+        "adc_dynamic_power": 1.135,
+        "adc_count": 16,
+        "shift_adder_latency_cycle": 1,
+        "output_buffer_latency_cycle": 1
+      },
+      "vector_width": 32,
+      "vector_latency_cycle": 4,
+      "local_memory_config": {
+        "data_width": 64,
+        "period": 1,
+        "write_latency_cycle": 30,
+        "read_latency_cycle": 20
+      },
+      "global_memory_switch_id": -10
+    },
+    "global_memory_config": {
+      "data_width": 32,
+      "period": 1,
+      "write_latency_cycle": 50,
+      "read_latency_cycle": 40
+    },
+    "network_config": {
+      "bus_topology": "mesh",
+      "bus_width": 32,
+      "layout": [12, 14],
+      "net_config_file_path": "network_mesh_168.json"
+    },
+    "core_cnt": 168,
+    "global_memory_switch_id": -10
+  },
+  "sim_config": {
+    "sim_mode": 0,
+    "sim_time": 200,
+    "report_verbose_level": 0
+  }
+}

validation/networks/pimcomp_models/configs/arch-b.json

@@ -0,0 +1,54 @@
+{
+  "chip_config": {
+    "core_config": {
+      "period": 1,
+      "matrix_config": {
+        "xbar_array_count": 128,
+        "period": 1,
+        "pipeline_mode": true,
+        "dac_resolution": 1,
+        "dac_count": 128,
+        "xbar_size": [128, 128],
+        "cell_precision": 2,
+        "xbar_latency": 7,
+        "xbar_read_power": 22.24,
+        "sample_hold_latency_cycle": 1,
+        "adc_resolution": 8,
+        "adc_latency_cycle": 20,
+        "adc_static_power": 0.322,
+        "adc_dynamic_power": 1.135,
+        "adc_count": 16,
+        "shift_adder_latency_cycle": 1,
+        "output_buffer_latency_cycle": 1
+      },
+      "vector_width": 32,
+      "vector_latency_cycle": 4,
+      "local_memory_config": {
+        "data_width": 64,
+        "period": 1,
+        "write_latency_cycle": 30,
+        "read_latency_cycle": 20
+      },
+      "global_memory_switch_id": -10
+    },
+    "global_memory_config": {
+      "data_width": 32,
+      "period": 1,
+      "write_latency_cycle": 50,
+      "read_latency_cycle": 40
+    },
+    "network_config": {
+      "bus_topology": "mesh",
+      "bus_width": 32,
+      "layout": [6, 23],
+      "net_config_file_path": "network_mesh_138.json"
+    },
+    "core_cnt": 138,
+    "global_memory_switch_id": -10
+  },
+  "sim_config": {
+    "sim_mode": 0,
+    "sim_time": 200,
+    "report_verbose_level": 0
+  }
+}

validation/networks/pimcomp_models/configs/arch-c.json

@@ -0,0 +1,54 @@
+{
+  "chip_config": {
+    "core_config": {
+      "period": 1,
+      "matrix_config": {
+        "xbar_array_count": 8,
+        "period": 1,
+        "pipeline_mode": true,
+        "dac_resolution": 1,
+        "dac_count": 128,
+        "xbar_size": [512, 1024],
+        "cell_precision": 2,
+        "xbar_latency": 7,
+        "xbar_read_power": 22.24,
+        "sample_hold_latency_cycle": 1,
+        "adc_resolution": 8,
+        "adc_latency_cycle": 20,
+        "adc_static_power": 0.322,
+        "adc_dynamic_power": 1.135,
+        "adc_count": 16,
+        "shift_adder_latency_cycle": 1,
+        "output_buffer_latency_cycle": 1
+      },
+      "vector_width": 32,
+      "vector_latency_cycle": 4,
+      "local_memory_config": {
+        "data_width": 64,
+        "period": 1,
+        "write_latency_cycle": 30,
+        "read_latency_cycle": 20
+      },
+      "global_memory_switch_id": -10
+    },
+    "global_memory_config": {
+      "data_width": 32,
+      "period": 1,
+      "write_latency_cycle": 50,
+      "read_latency_cycle": 40
+    },
+    "network_config": {
+      "bus_topology": "mesh",
+      "bus_width": 32,
+      "layout": [8, 8],
+      "net_config_file_path": "network_mesh_64.json"
+    },
+    "core_cnt": 64,
+    "global_memory_switch_id": -10
+  },
+  "sim_config": {
+    "sim_mode": 0,
+    "sim_time": 200,
+    "report_verbose_level": 0
+  }
+}

validation/networks/pimcomp_models/resnet18/resnet18-v1-7.onnx

@@ -0,0 +1 @@
+../../resnetv2/depth_68/resnetv2_depth_68.onnx

validation/tools/compare_raptor_pimcomp.py

@@ -214,8 +214,17 @@ def prepare_pimcomp_model(model_path: Path, out_dir: Path) -> Path:
         if not equivalent:
             raise RuntimeError("Conv+BatchNormalization folding changed the model output")
         if any(node.op_type == "BatchNormalization" for node in model.graph.node):
-            raise RuntimeError("PIMCOMP model preparation did not eliminate BatchNormalization")
-        onnx.save(model, output_path)
+            import onnxruntime as ort
+
+            options = ort.SessionOptions()
+            options.graph_optimization_level = ort.GraphOptimizationLevel.ORT_ENABLE_BASIC
+            options.optimized_model_filepath = str(output_path)
+            ort.InferenceSession(str(model_path), options, providers=["CPUExecutionProvider"])
+            model = onnx.load(output_path)
+            if any(node.op_type == "BatchNormalization" for node in model.graph.node):
+                raise RuntimeError("PIMCOMP model preparation did not eliminate BatchNormalization")
+        else:
+            onnx.save(model, output_path)
     else:
         shutil.copy2(model_path, output_path)
     return output_path
@@ -271,9 +280,9 @@ def load_effective_hardware(args: argparse.Namespace) -> dict[str, int]:
 
 def write_pimsim_config(args: argparse.Namespace, out_dir: Path, hardware: dict[str, int]) -> Path:
     mesh_builder = load_mesh_builder()
-    example_config = REPO / "backend-simulators/pim/pimsim-nn/example/config/latency_config.json"
-    with open(example_config, "r", encoding="utf-8") as f:
+    with open(args.pimcomp_dir / "config.json", "r", encoding="utf-8") as f:
         config = json.load(f)
+    config["chip_config"]["core_config"].setdefault("rob_size", 1)
     config["chip_config"]["core_config"]["matrix_config"]["xbar_array_count"] = hardware["crossbar_count"]
     config["chip_config"]["core_config"]["matrix_config"]["xbar_size"] = [
         hardware["crossbar_size"],
@@ -491,10 +500,10 @@ def run_rust_validation(
     )
 
 
-def copy_pimcomp_outputs(args: argparse.Namespace, out_dir: Path):
+def copy_pimcomp_outputs(source_dir: Path, out_dir: Path):
     out_dir.mkdir(parents=True, exist_ok=True)
     for name in ("SimulationInfo.gz", "VerificationInfo.json", "MappingResult.txt"):
-        shutil.copy2(args.pimcomp_dir / "output" / name, out_dir / name)
+        shutil.copy2(source_dir / name, out_dir / name)
 
 
 def compile_pimcomp(
@@ -507,7 +516,7 @@ def compile_pimcomp(
     model_name = args.pimcomp_model_name or f"compare_{model_path.stem}"
     frontend_json = args.pimcomp_dir / "models/JSON" / f"{model_name}.json"
     frontend_cmd = [
-        "python3",
+        sys.executable,
         "frontend.py",
         "--model_path",
         str(model_path),
@@ -536,7 +545,7 @@ def compile_pimcomp(
         timeout_sec=args.timeout_seconds,
         steps=steps,
     )
-    copy_pimcomp_outputs(args, out_dir)
+    copy_pimcomp_outputs(args.pimcomp_dir / "output", out_dir)
     return out_dir / "VerificationInfo.json", out_dir / "SimulationInfo.gz"
 
 
@@ -798,7 +807,7 @@ def export_pimcomp_for_rust(
 def parse_pimsim_nn_report(output: str) -> dict[str, float | int | str]:
     patterns = {
         "output_count": r"output count:\s+([0-9]+)\s+samples",
-        "throughput": r"throughput:\s+([0-9.]+)\s+samples/s",
+        "throughput": r"throughput:\s+([0-9.eE+-]+)\s+samples/s",
         "average_latency_ms": r"average latency:\s+([0-9.eE+-]+)\s+ms",
         "latency_ms": r"latency:\s+([0-9.eE+-]+)\s+ms",
         "average_power_mw": r"average power:\s+([0-9.eE+-]+)\s+mW",
@@ -1192,6 +1201,11 @@ def main():
         type=Path,
         help="Reuse Raptor artifacts and results from an existing comparison_report.json.",
     )
+    parser.add_argument(
+        "--reuse-pimcomp-dir",
+        type=Path,
+        help="Reuse a directory containing PIMCOMP SimulationInfo.gz, VerificationInfo.json, and MappingResult.txt.",
+    )
     parser.add_argument("--skip-pimsim-nn", action="store_true")
     parser.add_argument("--verbose-raptor-compile", action="store_true")
     parser.add_argument("--raptor-extra-arg", action="append", default=[])
@@ -1365,17 +1379,31 @@ def main():
         out_dir / "pimcomp_model",
     )
 
-    compiled_pimcomp = try_stage(
-        failures,
-        "Compile PIMCOMP",
-        compile_pimcomp,
-        args,
-        pimcomp_model_path,
-        out_dir / "pimcomp",
-        steps,
-    ) if pimcomp_model_path is not None else None
-    if compiled_pimcomp is not None:
-        verification_info, simulation_info = compiled_pimcomp
+    if args.reuse_pimcomp_dir is not None:
+        reused_pimcomp_dir = args.reuse_pimcomp_dir.resolve()
+        copied_pimcomp = try_stage_success(
+            failures,
+            "Reuse PIMCOMP outputs",
+            copy_pimcomp_outputs,
+            reused_pimcomp_dir,
+            out_dir / "pimcomp",
+        )
+        if copied_pimcomp:
+            verification_info = out_dir / "pimcomp/VerificationInfo.json"
+            simulation_info = out_dir / "pimcomp/SimulationInfo.gz"
+            print(f"\n[Reuse PIMCOMP]\n  Directory: {reused_pimcomp_dir}")
+    else:
+        compiled_pimcomp = try_stage(
+            failures,
+            "Compile PIMCOMP",
+            compile_pimcomp,
+            args,
+            pimcomp_model_path,
+            out_dir / "pimcomp",
+            steps,
+        ) if pimcomp_model_path is not None else None
+        if compiled_pimcomp is not None:
+            verification_info, simulation_info = compiled_pimcomp
 
     if verification_info is not None and simulation_info is not None and model_io is not None:
         exported = try_stage(

validation/tools/run_pimcomp_paper_latency.py

@@ -0,0 +1,148 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import argparse
+import re
+import shlex
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+
+REPO = Path(__file__).resolve().parents[2]
+SUITE = REPO / "validation/networks/pimcomp_models"
+PIMCOMP_SOURCE = REPO / "third_party/PIMCOMP-NN"
+COMPARE = REPO / "validation/tools/compare_raptor_pimcomp.py"
+MODELS = {
+    "vgg8": SUITE / "vgg8/vgg8-mnist-reconstructed.onnx",
+    "resnet18": SUITE / "resnet18/resnet18-v1-7.onnx",
+    "resnet34": SUITE / "resnet34/resnet34-v1-7.onnx",
+    "googlenet": SUITE / "googlenet/googlenet-12-no-softmax.onnx",
+}
+
+
+def run(command: list[str], *, dry_run: bool, check: bool = True) -> int:
+    print(f"$ {shlex.join(command)}", flush=True)
+    if dry_run:
+        return 0
+    return subprocess.run(command, cwd=REPO, check=check).returncode
+
+
+def prepare_pimcomp(work_dir: Path) -> None:
+    shutil.copytree(
+        PIMCOMP_SOURCE,
+        work_dir,
+        dirs_exist_ok=True,
+        ignore=shutil.ignore_patterns(".git", "build", "output"),
+    )
+    header = work_dir / "backend/GeneticAlgorithm.h"
+    source = header.read_text(encoding="utf-8")
+    if "int population_num = 200;" not in source:
+        raise RuntimeError("PIMCOMP GA population is not 200")
+    source, replacements = re.subn(
+        r"int max_iteration = \d+;",
+        "int max_iteration = 1000;",
+        source,
+    )
+    if replacements != 1:
+        raise RuntimeError("Could not set PIMCOMP GA max_iteration")
+    header.write_text(source, encoding="utf-8")
+    shutil.copy2(SUITE / "configs/arch-a.json", work_dir / "config.json")
+
+
+def comparison_command(model: Path, result_dir: Path, pimcomp_dir: Path, timeout: float) -> list[str]:
+    return [
+        sys.executable,
+        str(COMPARE),
+        "--model",
+        str(model),
+        "--out-dir",
+        str(result_dir),
+        "--pimcomp-dir",
+        str(pimcomp_dir),
+        "--core-count",
+        "168",
+        "--crossbar-count",
+        "96",
+        "--crossbar-size",
+        "128",
+        "--mesh-rows",
+        "12",
+        "--mesh-cols",
+        "14",
+        "--pimsim-mode",
+        "latency",
+        "--pimcomp-pipeline",
+        "element",
+        "--pimcomp-replication",
+        "GA",
+        "--timeout-seconds",
+        str(timeout),
+        "--fail-on-error",
+    ]
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(
+        description="Reproduce the serial Arch-A latency comparison from the PIMCOMP paper."
+    )
+    parser.add_argument("--out-dir", required=True, type=Path)
+    parser.add_argument("--models", nargs="+", choices=MODELS, default=list(MODELS))
+    parser.add_argument("--timeout-seconds", type=float, default=3600.0)
+    parser.add_argument(
+        "--resume",
+        action="store_true",
+        help="Keep the existing work tree and skip models with a completed JSON report.",
+    )
+    parser.add_argument("--dry-run", action="store_true", help="Print commands without modifying files.")
+    args = parser.parse_args()
+
+    out_dir = args.out_dir.resolve()
+    work_dir = out_dir / "pimcomp-ga1000"
+    if not args.dry_run and out_dir.exists() and any(out_dir.iterdir()) and not args.resume:
+        parser.error(f"{out_dir} is not empty; choose a fresh directory or pass --resume")
+
+    missing = [str(MODELS[name]) for name in args.models if not MODELS[name].exists()]
+    if missing:
+        parser.error(f"missing model(s): {', '.join(missing)}")
+
+    if args.dry_run:
+        print(f"# prepare isolated PIMCOMP GA build in {work_dir}")
+    else:
+        out_dir.mkdir(parents=True, exist_ok=True)
+        prepare_pimcomp(work_dir)
+
+    run(["cmake", "--build", str(REPO / "build_release")], dry_run=args.dry_run)
+    run(
+        ["cmake", "-S", str(work_dir), "-B", str(work_dir / "build")],
+        dry_run=args.dry_run,
+    )
+    run(
+        ["cmake", "--build", str(work_dir / "build"), "--target", "PIMCOMP-NN"],
+        dry_run=args.dry_run,
+    )
+
+    failed = []
+    for name in args.models:
+        result_dir = out_dir / name
+        if args.resume and (result_dir / "comparison_report.json").exists():
+            print(f"[{name}] completed report exists; skipping", flush=True)
+            continue
+        print(f"\n[{name}] Arch-A latency comparison", flush=True)
+        returncode = run(
+            comparison_command(MODELS[name], result_dir, work_dir, args.timeout_seconds),
+            dry_run=args.dry_run,
+            check=False,
+        )
+        if returncode:
+            failed.append(name)
+
+    if failed:
+        print(f"\nCompleted with failed comparisons: {', '.join(failed)}", file=sys.stderr)
+        return 1
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())

validation/tools/split_onnx_prefixes.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+
+import argparse
+from pathlib import Path
+
+import onnx
+
+
+def split_prefixes(model_path: Path, output_dir: Path, name: str) -> None:
+    model = onnx.shape_inference.infer_shapes(onnx.load(model_path))
+    initializer_names = {initializer.name for initializer in model.graph.initializer}
+    input_names = [value.name for value in model.graph.input if value.name not in initializer_names]
+    extractor = onnx.utils.Extractor(model)
+
+    output_dir.mkdir(parents=True, exist_ok=True)
+    for depth, node in enumerate(model.graph.node):
+        output_name = next(output for output in node.output if output)
+        prefix = extractor.extract_model(input_names, [output_name])
+        prefix.ir_version = max(prefix.ir_version, 4)
+        onnx.checker.check_model(prefix)
+
+        depth_name = f"depth_{depth:02d}"
+        depth_dir = output_dir / depth_name
+        depth_dir.mkdir(parents=True, exist_ok=True)
+        output_path = depth_dir / f"{name}_{depth_name}.onnx"
+        onnx.save(prefix, output_path)
+        print(f"{depth_name}: {node.op_type} -> {output_name} ({len(prefix.graph.node)} nodes)")
+
+
+def main() -> None:
+    parser = argparse.ArgumentParser(description="Split an ONNX graph into one ancestor prefix per node.")
+    parser.add_argument("model", type=Path)
+    parser.add_argument("output_dir", type=Path)
+    parser.add_argument("--name", required=True)
+    args = parser.parse_args()
+    split_prefixes(args.model, args.output_dir, args.name)
+
+
+if __name__ == "__main__":
+    main()