Embracing Diversity: Enhanced DSP Blocks for Low-Precision Deep Learning on FPGAs
Why this work is in the frame
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Bibliographic record
Abstract
Use of reduced precisions in Deep Learning (DL) inference tasks has recently been shown to significantly improve accelerator performance and greatly reduce both model memory footprint and the required external memory bandwidth. With appropriate network retuning, reduced precision networks can achieve accuracy close or equal to that of full-precision floating-point models. Given the wide spectrum of precisions used in DL inference, FPGAs' ability to create custom bit-width datapaths gives them an advantage over other acceleration platforms in this domain. However, the embedded DSP blocks in the latest Intel and Xilinx FPGAs do not natively support precisions below 18-bit and thus can not efficiently pack low-precision multiplications, leaving the DSP blocks under-utilized. In this work, we present an enhanced DSP block that can efficiently pack 2× as many 9-bit and 4× as many 4-bit multiplications compared to the baseline Arria-10-like DSP block at the cost of 12% block area overhead which leads to only 0.6% total FPGA core area increase. We quantify the performance gains of using this enhanced DSP block in two state-of-the-art convolutional neural network accelerators on three different models: AlexNet, VGG-16, and ResNet-50. On average, the new DSP block enhanced the computational performance of the 8-bit and 4-bit accelerators by 1.32× and 1.6× and at the same time reduced the utilized chip area by 15% and 30% respectively.
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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 | 0.001 |
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