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surrogate: add autotune workflow
Minimal flow scripts + docs + plumbing to run the OpenROAD surrogate autotuner.
1 parent 93c42b2 commit 07d6f5d

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-6
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‎.gitignore‎

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@@ -13,6 +13,7 @@ flow/logs
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flow/reports
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flow/objects
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flow/tech
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flow/tmp_surrogate
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# Tar archives
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flow/*tar.gz
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# python venv
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venv/
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flow/backup_*
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# Local scratch notes (kept out of git)
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doc.md
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# macOS
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.DS_Store

‎flow/Makefile‎

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@@ -750,6 +750,20 @@ check-yosys:
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.PHONY: all
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all: check-yosys check-openroad synth floorplan place cts route finish
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.PHONY: surrogate_tune
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surrogate_tune: check-openroad synth
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($(TIME_CMD) $(OPENROAD_CMD) $(SCRIPTS_DIR)/surrogate_tune.tcl) 2>&1 | tee $(abspath $(LOG_DIR)/surrogate_tune.log)
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.PHONY: surrogate_tune_synthaware
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surrogate_tune_synthaware: check-openroad
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@mkdir -p $(LOG_DIR)
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($(TIME_CMD) $(PYTHON_EXE) $(SCRIPTS_DIR)/surrogate_tune_synthaware.py) 2>&1 | tee $(abspath $(LOG_DIR)/surrogate_tune_synthaware.log)
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.PHONY: surrogate_autotune
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surrogate_autotune: check-openroad
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@mkdir -p $(LOG_DIR)
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($(TIME_CMD) $(PYTHON_EXE) $(SCRIPTS_DIR)/surrogate_autotune.py) 2>&1 | tee $(abspath $(LOG_DIR)/surrogate_autotune.log)
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.PHONY: clean
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clean:
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@echo

‎flow/designs/asap7/aes/surrogate_base_params.json‎

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{
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"cts_cluster_size": 10,
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"cts_cluster_diameter": 50
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}

‎flow/designs/asap7/aes/surrogate_space.json‎

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{
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"clock_period": {
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"type": "float",
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"minmax": [300, 600],
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"step": 0
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},
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"core_utilization": {
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"type": "int",
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"minmax": [20, 99],
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"step": 1
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},
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"core_aspect_ratio": {
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"type": "float",
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"minmax": [0.9, 1.1],
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"step": 0
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},
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"tns_end_percent": {
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"type": "int",
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"minmax": [0, 100],
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"step": 1
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},
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"global_padding": {
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"type": "int",
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"minmax": [0, 3],
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"step": 1
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},
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"detail_padding": {
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"type": "int",
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"minmax": [0, 3],
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"step": 1
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},
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"enable_dpo": {
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"type": "binary",
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"minmax": [0, 1],
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"step": 1
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},
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"pin_layer_adjust": {
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"type": "float",
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"minmax": [0.2, 0.7],
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"step": 0
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},
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"above_layer_adjust": {
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"type": "float",
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"minmax": [0.2, 0.7],
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"step": 0
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},
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"density_margin_addon": {
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"type": "float",
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"minmax": [0.0, 0.99],
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"step": 0
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},
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"cts_cluster_size": {
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"type": "int",
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"minmax": [10, 40],
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"step": 1
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},
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"cts_cluster_diameter": {
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"type": "int",
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"minmax": [50, 200],
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"step": 1
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}
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}

‎flow/designs/asap7/aes/surrogate_space_no_cts.json‎

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{
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"clock_period": {
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"type": "float",
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"minmax": [300, 600],
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"step": 0
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},
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"core_utilization": {
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"type": "int",
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"minmax": [20, 99],
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"step": 1
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},
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"core_aspect_ratio": {
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"type": "float",
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"minmax": [0.9, 1.1],
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"step": 0
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},
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"tns_end_percent": {
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"type": "int",
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"minmax": [0, 100],
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"step": 1
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},
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"global_padding": {
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"type": "int",
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"minmax": [0, 3],
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"step": 1
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},
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"detail_padding": {
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"type": "int",
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"minmax": [0, 3],
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"step": 1
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},
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"enable_dpo": {
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"type": "binary",
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"minmax": [0, 1],
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"step": 1
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},
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"pin_layer_adjust": {
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"type": "float",
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"minmax": [0.2, 0.7],
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"step": 0
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},
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"above_layer_adjust": {
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"type": "float",
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"minmax": [0.2, 0.7],
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"step": 0
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},
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"density_margin_addon": {
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"type": "float",
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"minmax": [0.0, 0.99],
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"step": 0
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}
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}

‎flow/designs/asap7/aes/surrogate_space_no_cts_sane.json‎

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{
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"clock_period": {
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"type": "float",
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"minmax": [300, 420],
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"step": 0
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},
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"core_utilization": {
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"type": "int",
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"minmax": [50, 80],
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"step": 1
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},
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"core_aspect_ratio": {
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"type": "float",
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"minmax": [0.9, 1.1],
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"step": 0
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},
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"tns_end_percent": {
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"type": "int",
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"minmax": [80, 100],
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"step": 1
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},
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"global_padding": {
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"type": "int",
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"minmax": [0, 3],
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"step": 1
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},
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"detail_padding": {
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"type": "int",
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"minmax": [0, 3],
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"step": 1
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},
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"enable_dpo": {
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"type": "binary",
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"minmax": [0, 1],
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"step": 1
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},
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"pin_layer_adjust": {
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"type": "float",
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"minmax": [0.2, 0.7],
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"step": 0
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},
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"above_layer_adjust": {
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"type": "float",
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"minmax": [0.2, 0.7],
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"step": 0
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},
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"density_margin_addon": {
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"type": "float",
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"minmax": [0.0, 0.35],
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"step": 0
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}
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}
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‎flow/designs/nangate45/aes/surrogate_base_params.json‎

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{
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"core_utilization": 38
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}

‎flow/designs/nangate45/aes/surrogate_space_no_cts.json‎

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{
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"clock_period": {
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"type": "float",
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"minmax": [0.40, 2.00],
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"step": 0
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},
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"core_utilization": {
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"type": "int",
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"minmax": [20, 99],
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"step": 1
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},
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"tns_end_percent": {
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"type": "int",
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"minmax": [0, 100],
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"step": 1
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},
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"global_padding": {
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"type": "int",
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"minmax": [0, 3],
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"step": 1
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},
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"detail_padding": {
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"type": "int",
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"minmax": [0, 3],
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"step": 1
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},
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"enable_dpo": {
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"type": "binary",
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"minmax": [0, 1],
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"step": 1
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},
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"pin_layer_adjust": {
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"type": "float",
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"minmax": [0.2, 0.7],
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"step": 0
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},
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"above_layer_adjust": {
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"type": "float",
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"minmax": [0.2, 0.7],
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"step": 0
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},
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"density_margin_addon": {
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"type": "float",
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"minmax": [0.0, 0.99],
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"step": 0
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}
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}

‎flow/platforms/asap7/fastroute.tcl‎

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set_global_routing_layer_adjustment $::env(MIN_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER) 0.25
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# Configure global routing adjustment. Prefer explicit two-level per-layer
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# adjustments (PIN_LAYER_ADJUST/ABOVE_LAYER_ADJUST) when provided, otherwise
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# fall back to the platform default.
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if { [info exists ::env(PIN_LAYER_ADJUST)] && $::env(PIN_LAYER_ADJUST) != "" \
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&& [info exists ::env(ABOVE_LAYER_ADJUST)] && $::env(ABOVE_LAYER_ADJUST) != "" } {
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set min_layer $::env(MIN_ROUTING_LAYER)
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set max_layer $::env(MAX_ROUTING_LAYER)
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set next1 ""
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set next2 ""
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if { [regexp {^([A-Za-z_]+)([0-9]+)$} $min_layer -> prefix num] } {
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set next1 "${prefix}[expr {$num + 1}]"
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set next2 "${prefix}[expr {$num + 2}]"
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}
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if { $next1 != "" && $next2 != "" } {
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set_global_routing_layer_adjustment $min_layer-$next1 $::env(PIN_LAYER_ADJUST)
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set_global_routing_layer_adjustment $next2-$max_layer $::env(ABOVE_LAYER_ADJUST)
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} else {
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set_global_routing_layer_adjustment $::env(MIN_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER) 0.25
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}
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} else {
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set_global_routing_layer_adjustment $::env(MIN_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER) 0.25
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}
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set_routing_layers -clock $::env(MIN_CLK_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER)
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set_routing_layers -signal $::env(MIN_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER)

‎flow/platforms/nangate45/fastroute.tcl‎

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set_global_routing_layer_adjustment metal2-metal3 0.5
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set_global_routing_layer_adjustment metal4-$::env(MAX_ROUTING_LAYER) 0.25
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# Configure global routing adjustment. Prefer explicit two-level per-layer
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# adjustments (PIN_LAYER_ADJUST/ABOVE_LAYER_ADJUST) when provided, otherwise
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# fall back to the Nangate45 defaults.
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if { [info exists ::env(PIN_LAYER_ADJUST)] && $::env(PIN_LAYER_ADJUST) != "" \
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&& [info exists ::env(ABOVE_LAYER_ADJUST)] && $::env(ABOVE_LAYER_ADJUST) != "" } {
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set min_layer $::env(MIN_ROUTING_LAYER)
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set max_layer $::env(MAX_ROUTING_LAYER)
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set next1 ""
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set next2 ""
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if { [regexp {^([A-Za-z_]+)([0-9]+)$} $min_layer -> prefix num] } {
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set next1 "${prefix}[expr {$num + 1}]"
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set next2 "${prefix}[expr {$num + 2}]"
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}
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if { $next1 != "" && $next2 != "" } {
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set_global_routing_layer_adjustment $min_layer-$next1 $::env(PIN_LAYER_ADJUST)
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set_global_routing_layer_adjustment $next2-$max_layer $::env(ABOVE_LAYER_ADJUST)
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} else {
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set_global_routing_layer_adjustment metal2-metal3 0.5
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set_global_routing_layer_adjustment metal4-$::env(MAX_ROUTING_LAYER) 0.25
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}
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} else {
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set_global_routing_layer_adjustment metal2-metal3 0.5
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set_global_routing_layer_adjustment metal4-$::env(MAX_ROUTING_LAYER) 0.25
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}
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set_routing_layers -clock $::env(MIN_CLK_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER)
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set_routing_layers -signal $::env(MIN_ROUTING_LAYER)-$::env(MAX_ROUTING_LAYER)

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