Why do the benchmark test results between KDiskMark and Gnome Disks not match?

JonMagon / KDiskMark

A simple open-source disk benchmark tool for Linux distros

GNU General Public License v3.0

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Why do the benchmark test results between KDiskMark and Gnome Disks not match? #143

Closed AzizEmir closed 6 months ago

AzizEmir commented 7 months ago

Linux-distro (kernel version): Debian 12 / 6.1.0-18-amd64
Desktop Environment : Gnome
Qt Version: -
KDiskMark Version: 3.1.4
FIO Version: -

KDiskMark-3.1.4-fio-3.35-x86_64.AppImage

diskbenchmark ddwriteresult

slackingfred commented 6 months ago

I notice that your drive is LUKS encrypted. GNOME Disks tests the disk at block level, bypassing filesystems and thus LUKS. Both KDiskMark and dd tests at file level. So maybe the cost of LUKS en/decryption is source of the discrepancy you're seeing?