unsloth/studio/backend
Daniel Han cf1910c92d Harden the diffusion memory plan against transient free-VRAM undercounts
A cold FLUX.2-dev int8 load on an idle 183 GB B200 planned offload=model
(companions exceed budget) and silently served the GGUF as-is; the identical
retry went resident and engaged the hosted prequant. The plan arithmetic was
byte-identical across both loads (required 90,228 MiB, resident needs free of
about 124 GB); the only divergent input was torch.cuda.mem_get_info, which is
device-wide and instantaneous: a transient foreign CUDA context briefly held
about 100 GB at the first snapshot, and the planner trusted that single read.

Three changes:
- settled_snapshot_device_memory: on cuda, synchronize + empty_cache
  (best-effort) and take the MAX free over up to 3 spaced reads. A transient
  can only shrink free, so the max rejects transient undercounts while a
  persistent tenant still caps every read. _plan_memory now uses it.
- plan_fits_total_capacity + one replan retry: when the dense/prequant
  candidate fits TOTAL device capacity under the standard reserve and the 0.85
  resident margin, an offload verdict can only stem from the free reading, so
  the loader re-snapshots and replans once before declining the fast path.
  Explicit balanced/low_vram modes skip the retry (they offload by mode).
- diffusion.transformer_quant_declined log line with required/budget/free and
  the plan reasons, so the next decline is diagnosable from the server log
  (previously silent).

Verified: cold FLUX.2-dev int8 first load in a fresh server now engages the
hosted prequant resident (offload=none).
2026-07-17 08:46:24 +00:00
..
assets Add DeepSeek-V4-Flash-GGUF to Studio with none/high/max reasoning (#6908) 2026-07-07 06:13:43 -07:00
auth Studio: opt-in OpenAI /v1 model auto-switch and idle keep-warm (#6392) 2026-07-01 06:42:23 -07:00
core Harden the diffusion memory plan against transient free-VRAM undercounts 2026-07-17 08:46:24 +00:00
hub Studio: resolve the repo-root MTP drafter after the MTP/ GGUF rename (#7031) 2026-07-09 06:46:00 -07:00
loggers Studio: trim serving-log noise and surface llama-server engine stats (#6377) 2026-06-17 05:37:57 -07:00
models Merge remote-tracking branch 'origin/image-generation' into r7021 2026-07-13 09:28:04 +00:00
plugins Reduce and tighten code comments and docstrings repo-wide (#6095) 2026-06-08 23:09:51 -07:00
requirements Merge remote-tracking branch 'origin/main' into fold-integration 2026-07-07 05:52:16 +00:00
routes Studio: harden video/diffusion cache, attention, and CFG-parallel fault paths 2026-07-13 09:46:17 +00:00
state Studio: shareable per-checkpoint preview links (#6486) 2026-06-24 06:31:53 -07:00
storage Sort chat recents by last activity (#6844) 2026-07-07 17:54:32 +01:00
tests Harden the diffusion memory plan against transient free-VRAM undercounts 2026-07-17 08:46:24 +00:00
utils Studio: auto-detect completion masking markers, stop silent full-sequence training (#7054) 2026-07-11 05:13:45 -07:00
__init__.py Final cleanup 2026-03-12 18:28:04 +00:00
_platform_compat.py Reduce and tighten code comments and docstrings repo-wide (#6095) 2026-06-08 23:09:51 -07:00
cloudflare_tunnel.py Reap Studio child processes when the parent dies abnormally (#6425) 2026-06-18 05:51:22 -07:00
colab.py Studio Colab: opt-in shareable Cloudflare tunnel link (#6684) 2026-06-26 00:56:23 -07:00
main.py Tighten comments in the diffusion training core and API models 2026-07-12 12:06:44 +00:00
run.py Studio: fix torch CUDA undefined-symbol errors from a conflicting LD_LIBRARY_PATH (#6905) 2026-07-06 23:48:23 -07:00
startup_banner.py Fix Windows Studio UTF-8 startup handling (#6614) 2026-07-01 13:47:33 +01:00