support activation offloading via unsloth gc

Former-commit-id: d3d0dd0feba3ca6f0ae970d5856bec989d26ef67

scripts/cal_mfu.py

@@ -109,6 +109,7 @@ def calculate_mfu(
     deepspeed_stage: int = 0,
     disable_gc: bool = False,
     liger_kernel: bool = False,
+    unsloth_gc: bool = False,
 ) -> float:
     r"""
     Calculates MFU for given model and hyper-params.
@@ -119,6 +120,7 @@ def calculate_mfu(
         "flash_attn": flash_attn,
         "disable_gradient_checkpointing": disable_gc,
         "enable_liger_kernel": liger_kernel,
+        "use_unsloth_gc": unsloth_gc,
         "stage": "pt",
         "do_train": True,
         "finetuning_type": finetuning_type,