device: NVIDIA GeForce RTX 3090
config: pi05_base_robosynchallenge_full + LoRA (gemma_2b_lora / gemma_300m_lora)

batch_size 4:
2026-09-13 04:32:46.963432: W external/xla/xla/hlo/transforms/simplifiers/hlo_rematerialization.cc:3021] Can't reduce memory use below 10.10GiB (10840727187 bytes) by rematerialization; only reduced to 10.69GiB (11476415856 bytes), down from 10.69GiB (11476415920 bytes) originally
2026-09-13 04:34:20.593839: W external/xla/xla/hlo/transforms/simplifiers/hlo_rematerialization.cc:3021] Can't reduce memory use below 10.09GiB (10833834944 bytes) by rematerialization; only reduced to 17.09GiB (18354891708 bytes), down from 17.30GiB (18575703540 bytes) originally
    step 0: 130.69s
    step 1:   1.39s
    step 2:   1.39s
  peak 18.3 GB · 1.394 s/step · 7.7 h for 20000 steps

batch_size 8:
2026-09-13 04:35:26.518500: W external/xla/xla/hlo/transforms/simplifiers/hlo_rematerialization.cc:3021] Can't reduce memory use below 10.10GiB (10840727187 bytes) by rematerialization; only reduced to 10.69GiB (11476415856 bytes), down from 10.69GiB (11476415920 bytes) originally
2026-09-13 04:37:07.081161: W external/xla/xla/hlo/transforms/simplifiers/hlo_rematerialization.cc:3021] Can't reduce memory use below 10.08GiB (10826942736 bytes) by rematerialization; only reduced to 18.85GiB (20245133692 bytes), down from 18.96GiB (20364249444 bytes) originally
    step 0: 144.99s
    step 1:   2.47s
    step 2:   2.47s
  peak 19.6 GB · 2.471 s/step · 13.7 h for 20000 steps

batch_size 16:
2026-09-13 04:38:20.641762: W external/xla/xla/hlo/transforms/simplifiers/hlo_rematerialization.cc:3021] Can't reduce memory use below 10.10GiB (10840727187 bytes) by rematerialization; only reduced to 10.69GiB (11476415856 bytes), down from 10.69GiB (11476415920 bytes) originally
2026-09-13 04:40:13.242984: W external/xla/xla/hlo/transforms/simplifiers/hlo_rematerialization.cc:3021] Can't reduce memory use below 10.07GiB (10813158320 bytes) by rematerialization; only reduced to 17.55GiB (18841480900 bytes), down from 17.64GiB (18939876552 bytes) originally
    step 0: 157.73s
    step 1:   4.55s
    step 2:   4.56s
  peak 19.6 GB · 4.555 s/step · 25.3 h for 20000 steps

largest batch that fits: 16 (19.6 GB peak, 25.3 h for 20000 steps)
wrote /workspace/backup/batch_probe.json