KDiskMark

Linux

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Freedom report

Two barsScore 6.3

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

KDiskMark is ranked #16 of 65 in PC benchmark software on Freedom251. It runs on Linux. There is a free plan.

KDiskMark plans and pricing

All plans

KDiskMark Free Open-source disk benchmark tool github.com · 2 Oct 2026

Compared on PC benchmark software

Free plan: Yes
Random I/O tests: Yes
Sequential tests: Yes
IOPS measurement: Yes
Latency measurement: Yes
Supported platforms: Linux
Command-line interface: Yes

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The record

Purpose: KDiskMark benchmarks HDDs and SSDs through a graphical interface built around Flexible I/O Tester (fio).
Technology: The application is written in C++ with Qt and has no KDE dependencies.
Configurable tests: Users can configure block size, queue count, and thread count for each test.
Reports: KDiskMark can generate benchmark reports.
Terminal interface: It offers an interactive full-screen terminal mode for systems without a graphical display.
TUI configuration: The terminal interface supports settings including profile, file size, loops, storage, queues, threads, test data, page-cache flushing, O_DIRECT, and CoW detection.
Downloads: The project says binaries are available on its GitHub Releases page and documents installation through Flathub and Linux distribution repositories.
Snap package: The README says the Snap package is no longer maintained and will receive no updates.
Authorization: The GUI and terminal interface request administrator privileges through PolicyKit; the README says SSH sessions usually deny authentication for non-local users.
Dependencies: The listed required dependencies include Qt with Widgets and DBus, a PolicyKit agent, and Flexible I/O Tester with libaio.
Languages: The README lists support for multiple languages, including English, Chinese, French, German, Japanese, Portuguese (Brazilian), and Spanish.
Support: The project asks users to open an issue with ideas, criticism, or suggestions.
Maintainer: The linked GitHub profile identifies JonMagon as Dmitry Sidorov.
Price from: Free

Where it ranks on Freedom251

Best PC Benchmark Software in 2026#16 of 65
Best Disk Benchmark Software in 2026#9 of 29

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Sources

github.com/JonMagon/KDiskMark· checked 2 Oct 2026
github.com/JonMagon/KDiskMark/blob/master/README.m· checked 2 Oct 2026
github.com/JonMagon· checked 2 Oct 2026