CPUFJ for local search + simple rounding#405
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This reverts commit 4c1c75e.
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Co-authored-by: Rajesh Gandham <rgandham@nvidia.com>
Co-authored-by: Rajesh Gandham <rgandham@nvidia.com>
Co-authored-by: Rajesh Gandham <rgandham@nvidia.com>
Co-authored-by: Rajesh Gandham <rgandham@nvidia.com>
Fixes two small packaging issues with `cuopt-server`: * removes unnecessary dependency on `httpx` (`cuopt-server` does not use this) * declares dependency on `psutil` (this is declared in wheels but was missing in conda packages) ## Notes for Reviewers ### How I found these Was looking at the conda recipes and checked these things, similar to this: ```shell git grep httpx ``` # Authors: - James Lamb (https://github.com/jameslamb) Approvers: - Ramakrishnap (https://github.com/rgsl888prabhu) URL: #413
This dataset was disabled in PR #335 since the website was down, the services have been restored as of now, so enabling this back. And also adding details to README to benchmark mittleman and miplib. ## Issue #335 Authors: - Ramakrishnap (https://github.com/rgsl888prabhu) Approvers: - Rajesh Gandham (https://github.com/rg20) URL: #414
Adds 2 more video links to docs Authors: - Ramakrishnap (https://github.com/rgsl888prabhu) Approvers: - Trevor McKay (https://github.com/tmckayus) URL: #416
nguidotti
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Sep 26, 2025
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This PR introduces a host-side implementation of Feasibility Jump 2.0 (Efficient Local Search), with CPU-specific tweaks and optimizations. This heuristic is run in parallel with GPU FJ during local search, and the best resulting solution is picked. Also included in this PR: - Implementation of the simple rounding algorithm (up/down-lock based rounding, cf. "Rounding and Propagation Heuristics for Mixed Integer Programming") - Some crash/assert trigger fixes - Minor hyperparameter tuning - `build.sh` option to emit lineinfo for host source files **Benchmark results:** Main branch [53d6e74](NVIDIA@53d6e74): ``` Regression Baseline Summary (Time Limit: 600s): Feasible instances: 221/240 Average gap: 0.207478 Average integral: 0.261499 ``` [Excel results](https://docs.google.com/spreadsheets/d/1caQCORK0n-1ynOpxkIrt00rq6mKiAhg2/edit?usp=drive_link&ouid=101768445160958513821&rtpof=true&sd=true) PR (cad9773): ``` cuopt 600s: feasible 222/240 gap 0.176733 integral 0.241953 ``` [Excel results](https://docs.google.com/spreadsheets/d/1qt1dIjp-FNBaNQwFiQ2Fdzx1hOAyc8et/edit?usp=drive_link&ouid=101768445160958513821&rtpof=true&sd=true) closes NVIDIA#360 Authors: - Alice Boucher (https://github.com/aliceb-nv) - Akif ÇÖRDÜK (https://github.com/akifcorduk) - Kumar Aatish (https://github.com/kaatish) - Rajesh Gandham (https://github.com/rg20) - Hugo Linsenmaier (https://github.com/hlinsen) - Ramakrishnap (https://github.com/rgsl888prabhu) - Ishika Roy (https://github.com/Iroy30) - James Lamb (https://github.com/jameslamb) Approvers: - Trevor McKay (https://github.com/tmckayus) - Rajesh Gandham (https://github.com/rg20) URL: NVIDIA#405
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This PR introduces a host-side implementation of Feasibility Jump 2.0 (Efficient Local Search), with CPU-specific tweaks and optimizations. This heuristic is run in parallel with GPU FJ during local search, and the best resulting solution is picked.
Also included in this PR:
build.shoption to emit lineinfo for host source filesBenchmark results:
Main branch 53d6e74:
Excel results
PR (cad9773):
Excel results
closes #360