Implementation:Alibaba ROLL DistillPipeline Val

Knowledge Sources	Alibaba ROLL
Domains	Knowledge_Distillation, Evaluation
Last Updated	2026-02-07 20:00 GMT

Overview

Concrete distillation validation method provided by the Alibaba ROLL library.

Description

The DistillPipeline.val method evaluates the student model's SFT loss on validation data without teacher logits.

Usage

Called at evaluation intervals during distillation training.

Code Reference

Source Location

• Repository: Alibaba ROLL
• File: roll/pipeline/distill/distill_pipeline.py
• Lines: L336-346

Signature

class DistillPipeline(BasePipeline):
    @torch.no_grad()
    def val(self) -> Dict:
        """
        Validation for distillation pipeline (SFT loss only).

        Returns:
            Dict with student/val_loss metric
        """

Import

from roll.pipeline.distill.distill_pipeline import DistillPipeline

I/O Contract

Inputs

Name	Type	Required	Description
val_dataloader	DataLoader	Yes	Validation data (from pipeline state)

Outputs

Name	Type	Description
metrics	Dict	student/val_loss

Usage Examples

if step % eval_steps == 0:
    val_metrics = pipeline.val()
    print(val_metrics)  # {"student/val_loss": 1.85}

Related Pages

Implements Principle

• Principle:Alibaba_ROLL_Distillation_Validation

Environment Dependencies

This implementation requires the following environment constraints:

• Environment:Alibaba_ROLL_Python_Runtime_Environment

Heuristics Applied

No specific heuristics apply to this implementation.