CEED/libCEED

FLOP Estimates for Assembly Kernels

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#1,983 opened on Jun 10, 2026

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enhancementgood first issuehelp wantedperformance

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Description

It would be useful for performance profiling to provide FLOP count estimates for CeedOperatorLinearAssemblePointBlockDiagonal, CeedOperatorLinearAssemble, and CeedOperatorLinearAssembleDiagonal. This is quite backend dependent, and also may differ based on whether the QFunction assembly data is stale. We should determine how to be as accurate as possible with that info, but even a rough estimate would be useful.

This is mostly just counting.

Contributor guide

Research direction
Study the existing assembly kernel implementations and identify arithmetic operations per element; then sum FLOPs based on matrix dimensions.
Tech stack
c
Domain
backendperformance
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Half day
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Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
C
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
60