Machine Learning for Congestion Management and Routability Prediction within FPGA Placement
Why this work is in the frame
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Bibliographic record
Abstract
Placement for Field Programmable Gate Arrays (FPGAs) is one of the most important but time-consuming steps for achieving design closure. This article proposes the integration of three unique machine learning models into the state-of-the-art analytic placement tool GPlace3.0 with the aim of significantly reducing placement runtimes. The first model, MLCong, is based on linear regression and replaces the computationally expensive global router currently used in GPlace3.0 to estimate switch-level congestion. The second model, DLManage, is a convolutional encoder-decoder that uses heat maps based on the switch-level congestion estimates produced by MLCong to dynamically determine the amount of inflation to apply to each switch to resolve congestion. The third model, DLRoute, is a convolutional neural network that uses the previous heat maps to predict whether or not a placement solution is routable. Once a placement solution is determined to be routable, further optimization may be avoided, leading to improved runtimes. Experimental results obtained using 372 benchmarks provided by Xilinx Inc. show that when all three models are integrated into GPlace3.0, placement runtimes decrease by an average of 48%.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it