| --- |
| tags: |
| - lora |
| - peft |
| - quantization |
| - glue |
| - model-merging |
| --- |
| |
| # GLUE LoRA x Backbone Bit-Width — combined results |
|
|
| Aggregated metrics, LoRA geometry analysis and figures for a controlled study of |
| whether backbone bit-width (bf16 / int8 / nf4) changes what a LoRA adapter |
| learns. |
|
|
| **Grid**: 2 model sizes (1B, 3B) x 4 GLUE tasks (MNLI, QQP, SST-2, |
| RTE) x 3 bit-widths x 3 seeds = 72 runs (0 present here). |
|
|
| For each (model size, seed) the adapter initialisation is identical across |
| bit-widths, so cross-bit differences are attributable to the backbone. The |
| headline statistic is |
|
|
| ``` |
| Gamma = mean cross-bit-width adapter distance / mean within-bit-width seed distance |
| ``` |
|
|
| Gamma > 1 means bit-width perturbs the adapter more than the random seed does. |
|
|
| ## Files |
|
|
| - `results_summary.md` — the report, answering the 8 study questions |
| - `aggregate_results.csv` — per-run metrics |
| - `aggregate_results_by_task.csv`, `aggregate_results_by_condition.csv` |
| - `adapter_layer_metrics.csv` — per-adapter per-layer geometry (norms, effective |
| rank, stable rank, singular values, energy) |
| - `pairwise_geometry_metrics.csv` — per-pair per-layer comparisons (Frobenius |
| distance, cosine, principal angles, projection overlap, sign agreement) |
| - `gamma_table.csv` — bit-width vs seed effect sizes |
| - `plots/` — 7 figures |
|
|
| Adapters live in `Jeesup/llama32-<size>-<task>-<bitwidth>-lora-seed<seed>`. |
|
|
