# CPQ IO Scheduler: reconstructing Xiaomi's block scheduler > CPQ IO Scheduler reconstructs Xiaomi's proprietary cpq.ko Linux block scheduler from a stripped ARM64 kernel module. Its out-of-tree C implementation combines priority classes, thread-group queues, deadline handling, and blk-mq elevator integration, with a whitepaper and author-reported benchmarks. - Type: Case study - Targets: Binary - Category: Independent reconstruction cases - Relationship: Independent reconstruction project - Sources reviewed: 2026-11-06 - Added to the catalog: 2026-11-06 - Original resource: - Primary source: - Catalog page: - Record JSON: - Chinese version: [简体中文](https://awesomerea.org/zh/resources/cpq-iosched-case/index.md) ## Requirements & limits - **Prerequisites:** Building requires Linux kernel headers for the block layer and scheduler APIs; the author reports testing on Linux 6.1 with RK3588 and eMMC 5.1. - **Testing evidence:** The author reports a 5-of-6 workload win against mq-deadline, with about 1.9% average IOPS uplift. - **License:** GPL-2.0 license, as stated in the README and source-file notice. ## Primary sources 1. ## More in Native binaries - [Malware Analysis: njRAT and Casdet behavior investigation](https://awesomerea.org/resources/malware-analysis-njrat-casdet-case/index.md) · Case study - [Ghidra](https://awesomerea.org/resources/ghidra/index.md) · Tool - [radare2](https://awesomerea.org/resources/radare2/index.md) · Tool - [Cutter](https://awesomerea.org/resources/cutter/index.md) · Tool - [Qiling](https://awesomerea.org/resources/qiling/index.md) · Tool - [Unicorn Engine](https://awesomerea.org/resources/unicorn/index.md) · Tool ## About this entry The description was reviewed against primary sources. Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.