Michael Chus
a636146dbd
When a targeted_power attempt is cancelled (e.g. after sw_thermal throttle), nv-hostengine holds the diagnostic slot asynchronously. The next attempt immediately received DCGM_ST_IN_USE (exit 222) and incorrectly derated the power limit. Now: exit 222 is detected via isDCGMResourceBusy and triggers an exponential back-off retry at the same power limit (1s, 2s, 4s, … up to 256s). Once the back-off delay would exceed 300s the calibration fails, indicating the slot is persistently held. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>