https://bugs.kde.org/show_bug.cgi?id=429725
Bug ID: 429725
Summary: Parallelize thumbnail generation on multicore systems
Product: dolphin
Version: 20.08.3
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: view-engine: icons mode
Assignee: dolphin-bugs-n...@kde.org
Reporter: kde-b...@pyoworks.com
CC: kfm-de...@kde.org
Target Milestone: ---
SUMMARY
I have folders with lots of images. My system is a modern 8core/16thread Ryzen
with NVMe storage and 32GB of RAM. When opening a folder in "thumbail view" for
the first time, Dolphin will start thumbnail generation. Looking at the "top"
output, I can only see one thumbnail.so process while most of the CPU cores are
idle.
Is it possible to parallelize the thumbnail generation to make it faster? E.g.
when opening a folder with 100 images, why not divide them and start X threads
of the thumbnail generator in parallel? Number of threads could be calculated
based on number of cores/threads and/or made configurable to fit user needs.
STEPS TO REPRODUCE
1. Open folder with logs of images in Dolphin in icon/thumbnail mode
2. Look at top/ps -> only one thumbnail.so process processing sequentially the
directory, other cpu cores idle.
3.
OBSERVED RESULT
EXPECTED RESULT
SOFTWARE/OS VERSIONS
Operating System: Gentoo Linux
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.74.0
Qt Version: 5.15.1
Kernel Version: 5.9.11
OS Type: 64-bit
Processors: 16 × AMD Ryzen 7 3700X 8-Core Processor
Memory: 31.4 GiB of RAM
Graphics Processor: AMD Radeon RX 5700 XT
ADDITIONAL INFORMATION
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