-
Notifications
You must be signed in to change notification settings - Fork 41
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
* Added new flow, `SynthesisExploration`, that tries all synthesis strategies in parallel, performs STA and reports key area and delay metrics * `Yosys.Synthesis` * Updated error for bad area/delay format to make a bit more sense * Updated internal `stat` calls to Yosys to pass the liberty arguments so the area can be consistently calculated * Removed `SYNTH_STRATEGY` value `AREA 4` -- never existed or worked
- Loading branch information
Showing
4 changed files
with
153 additions
and
6 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,143 @@ | ||
| # Copyright 2023 Efabless Corporation | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
| from __future__ import annotations | ||
| from decimal import Decimal | ||
| import os | ||
|
|
||
| import rich | ||
| import rich.table | ||
| from typing import Dict, List, Optional, Tuple | ||
| from concurrent.futures import Future | ||
|
|
||
| from .flow import Flow | ||
| from ..state import State | ||
| from ..config import Config | ||
| from ..logging import success | ||
| from ..logging import options, console | ||
| from ..steps import Step, Yosys, OpenROAD, StepError | ||
|
|
||
|
|
||
| # "Synthesis Exploration" is a non-seqeuential flow that tries all synthesis | ||
| # strategies and shows which ones yield the best area XOR delay | ||
| @Flow.factory.register() | ||
| class SynthesisExploration(Flow): | ||
| Steps = [ | ||
| Yosys.Synthesis, | ||
| OpenROAD.CheckSDCFiles, | ||
| OpenROAD.STAPrePNR, | ||
| ] | ||
|
|
||
| def run( | ||
| self, | ||
| initial_state: State, | ||
| **kwargs, | ||
| ) -> Tuple[State, List[Step]]: | ||
| step_list: List[Step] = [] | ||
|
|
||
| self.progress_bar.set_max_stage_count(1) | ||
|
|
||
| synth_futures: List[Tuple[Config, Future[State]]] = [] | ||
| self.progress_bar.start_stage("Synthesis Exploration") | ||
|
|
||
| options.set_condensed_mode(True) | ||
|
|
||
| for strategy in [ | ||
| "AREA 0", | ||
| "AREA 1", | ||
| "AREA 2", | ||
| "AREA 3", | ||
| "DELAY 0", | ||
| "DELAY 1", | ||
| "DELAY 2", | ||
| "DELAY 3", | ||
| "DELAY 4", | ||
| ]: | ||
| config = self.config.copy(SYNTH_STRATEGY=strategy) | ||
|
|
||
| synth_step = Yosys.Synthesis( | ||
| config, | ||
| id=f"synthesis-{strategy}", | ||
| state_in=initial_state, | ||
| ) | ||
| synth_future = self.start_step_async(synth_step) | ||
| step_list.append(synth_step) | ||
|
|
||
| sdc_step = OpenROAD.CheckSDCFiles( | ||
| config, | ||
| id=f"sdc-{strategy}", | ||
| state_in=synth_future, | ||
| ) | ||
| sdc_future = self.start_step_async(sdc_step) | ||
| step_list.append(sdc_step) | ||
|
|
||
| sta_step = OpenROAD.STAPrePNR( | ||
| config, | ||
| state_in=sdc_future, | ||
| id=f"sta-{strategy}", | ||
| ) | ||
|
|
||
| step_list.append(sta_step) | ||
| sta_future = self.start_step_async(sta_step) | ||
|
|
||
| synth_futures.append((config, sta_future)) | ||
|
|
||
| results: Dict[str, Optional[Tuple[Decimal, Decimal, Decimal, Decimal]]] = {} | ||
| for config, future in synth_futures: | ||
| strategy = config["SYNTH_STRATEGY"] | ||
| results[strategy] = None | ||
| try: | ||
| state = future.result() | ||
| results[strategy] = ( | ||
| state.metrics["design__instance__count"], | ||
| state.metrics["design__instance__area"], | ||
| state.metrics["timing__setup__ws"], | ||
| state.metrics["timing__setup__tns"], | ||
| ) | ||
| except StepError: | ||
| pass # None == failure | ||
| self.progress_bar.end_stage() | ||
| options.set_condensed_mode(False) | ||
|
|
||
| successful_results = {k: v for k, v in results.items() if v is not None} | ||
| min_gates = min(map(lambda x: x[0], successful_results.values())) | ||
| min_area = min(map(lambda x: x[1], successful_results.values())) | ||
| max_slack = max(map(lambda x: x[2], successful_results.values())) | ||
| max_tns = max(map(lambda x: x[3], successful_results.values())) | ||
|
|
||
| table = rich.table.Table() | ||
| table.add_column("SYNTH_STRATEGY") | ||
| table.add_column("Gates") | ||
| table.add_column("Area (µm²)") | ||
| table.add_column("Setup Slack (ns)") | ||
| table.add_column("Total Negative Slack (ns)") | ||
| for key, result in results.items(): | ||
| gates_s = "[red]Failed" | ||
| area_s = "[red]Failed" | ||
| slack_s = "[red]Failed" | ||
| tns_s = "[red]Failed" | ||
| if result is not None: | ||
| gates, area, slack, tns = result | ||
| gates_s = f"{'[green]' if gates == min_gates else ''}{gates}" | ||
| area_s = f"{'[green]' if area == min_area else ''}{area}" | ||
| slack_s = f"{'[green]' if slack == max_slack else ''}{slack}" | ||
| tns_s = f"{'[green]' if tns == max_tns else ''}{tns}" | ||
| table.add_row(key, gates_s, area_s, slack_s, tns_s) | ||
|
|
||
| console.print(table) | ||
| assert self.run_dir is not None | ||
| with open(os.path.join(self.run_dir, "summary.rpt"), "w") as f: | ||
| rich.print(table, file=f) | ||
|
|
||
| success("Flow complete.") | ||
| return (initial_state, step_list) |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters