Bug 448843 - Multiple Cores Not Used
Summary: Multiple Cores Not Used
Status: RESOLVED FIXED
Alias: None
Product: digikam
Classification: Applications
Component: Faces-Recognition (other bugs)
Version First Reported In: 7.5.0
Platform: Microsoft Windows Microsoft Windows
: NOR normal
Target Milestone: ---
Assignee: Digikam Developers
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2022-01-20 18:17 UTC by Stewart Bodzin
Modified: 2023-06-20 05:42 UTC (History)
5 users (show)

See Also:
Latest Commit: https://invent.kde.org/documentation/digikam-doc/-/commit/7230f0154708c5066b666b1e10c2c3eceb17eb89
Version Fixed In: 8.1.0
Sentry Crash Report:

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Description Stewart Bodzin 2022-01-20 18:17:49 UTC 
This bug report program identifies my system as Windows 10; however, I'm running Windows 11.  When doing face recognition, the work on all cores does not work, only a single core is being used on my ASUS i9 which can run 16 threads on its 8 cores.
Comment 1 caulier.gilles 2022-01-20 18:23:54 UTC 
In People left sidebar tab, did you turn on the option "Work on all processor cores" from Settings view ?

Gilles Caulier
Comment 2 Maik Qualmann 2022-04-19 13:06:38 UTC 
*** Bug 452765 has been marked as a duplicate of this bug. ***
Comment 3 Michael 2022-06-02 14:15:44 UTC 
Hi there,

Windows 11
MariaDB 10.6.3
Digikam 7.6.0
Prozessor AMD Ryzen 7 5800X 8 Cores (16 Threads)
3 SSD-Drives (2TB each)
32GB RAM
500.000 Images

Result: Only 1 Thread is running therefore only 1/2 CPU Core is used.

Same to fingerprinting.
Comment 4 Maik Qualmann 2022-06-02 14:34:18 UTC 
MariaDB-10.6.x is currently not a good idea. The Qt-MySQL driver currently only supports MariaDB-10.5.x at maximum on Windows. Malfunctions and crashes may occur. MariaDB-10.6.x introduced a change to the API. We hope to be able to compile digiKam with a version of Qt on Windows that has an updated driver soon.

Maik
Comment 5 caulier.gilles 2023-05-02 16:59:05 UTC 
Stewart

did you seen the last message from Maik ?

Gilles Caulier
Comment 6 Michael 2023-06-19 19:54:05 UTC 
Since version 8.0.0 I am using SQLite. Performance is good and all available and possible cores are used.

Michael
Comment 7 caulier.gilles 2023-06-20 05:42:39 UTC 
Git commit 7230f0154708c5066b666b1e10c2c3eceb17eb89 by Gilles Caulier.
Committed on 20/06/2023 at 05:21.
Pushed by cgilles into branch 'master'.

Online documentation: Multi-core support in faces management: add tip about Mysql/Mariadb limitations.
Related: bug 452765
FIXED-IN: 8.1.0

M  +4    -0    main_window/people_view.rst

https://invent.kde.org/documentation/digikam-doc/-/commit/7230f0154708c5066b666b1e10c2c3eceb17eb89