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THE FEUTEX TOOLKIT

Pipeline Parallel Bubble Fraction

Estimate fill and drain overhead for a simple pipeline of equal stages.

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02 Your result
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FormulaFill-drain bubble fraction = 100*(stages-1)/(micro+stages-1); Forward pipeline elapsed = (micro+stages-1)*time

Made for real tasks

  • Estimate fill and drain overhead for a simple pipeline of equal stages.
Explore step-by-step workflows →

Worked example

Inputs

Pipeline stages
8 stages
Microbatches
32 microbatches
One stage compute time
20 ms

Expected results

Fill-drain bubble fraction
17.94871795 %
Forward pipeline elapsed
780 ms

Load the example in the workspace to reproduce these results. Display rounding does not change the underlying calculation.

How to use this tool

  1. Enter pipeline stages, microbatches, one stage compute time in the displayed units.
  2. Calculate the scenario, then compare it with measurements before changing a system.

Try this example

{
  "stages": 8,
  "micro": 32,
  "time": 20
}

Accuracy and scope

Simple forward fill-drain schedule; not a full 1F1B training timing model.

Is my data uploaded?

This tool runs locally in your browser. Input and output are not sent to a processing server. Copy or download your result before leaving the page.