[Bug 417819] Re: Rebuilding thumbnails in digiKam is inefficient on multicore systems

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On 2008-04-15T19:24:54+00:00 Oliver-koch-u wrote:

Version:           0.9.3 (using KDE 3.5.9)
Installed from:    Debian testing/unstable Packages
OS:                Linux

Is there the possibility to add multicore support in the image
manipulation or enhance plugins. Most common cpus ourtimes have dual or
more cores ? I saw if there are computing intensiv plugins, only one
core is used.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/digikam/+bug/417819/comments/0

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On 2009-10-11T20:28:39+00:00 Luka Renko wrote:

There is also wish in Ubuntu about thumbnail generation with multiple core/CPU:
https://launchpad.net/bugs/417819

Reply at:
https://bugs.launchpad.net/ubuntu/+source/digikam/+bug/417819/comments/3

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On 2010-01-14T15:41:51+00:00 Caulier-gilles-9 wrote:

To be clear here, we need to use OpenMP API everywhere when it's
possible...

Gilles Caulier

Reply at:
https://bugs.launchpad.net/ubuntu/+source/digikam/+bug/417819/comments/4

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On 2010-01-14T18:03:34+00:00 Johannes Wienke wrote:

I'm not convinced that OpenMP is the one and only solution for
generating multi-threaded code. For pre-existing algorithms it is a nice
way but for other stuff that needs more control over the number of
threads, synchronization etc. it's not a good way.

For the thumbnail generation a thread pool wit a user defined size
sounds like a more appropriate solution to my mind.

Reply at:
https://bugs.launchpad.net/ubuntu/+source/digikam/+bug/417819/comments/5

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On 2011-11-22T14:53:29+00:00 Caulier-gilles-9 wrote:

Please tests and report. My patch is against git/master. Let's me hear
if this solution is suitable for you. It's not configurable.

Gilles Caulier

Reply at:
https://bugs.launchpad.net/ubuntu/+source/digikam/+bug/417819/comments/6

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On 2011-11-22T14:54:32+00:00 Caulier-gilles-9 wrote:

sorry for the noise. wrong report

Gilles Caulier

Reply at:
https://bugs.launchpad.net/ubuntu/+source/digikam/+bug/417819/comments/7

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On 2011-12-17T16:07:10+00:00 Caulier-gilles-9 wrote:


*** This bug has been marked as a duplicate of bug 289204 ***

Reply at:
https://bugs.launchpad.net/ubuntu/+source/digikam/+bug/417819/comments/8

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On 2022-01-08T11:38:31+00:00 Caulier-gilles-9 wrote:

Fixed with https://bugs.kde.org/show_bug.cgi?id=289204

Reply at:
https://bugs.launchpad.net/ubuntu/+source/digikam/+bug/417819/comments/11


** Changed in: digikam
       Status: Invalid => Fix Released

** Bug watch added: KDE Bug Tracking System #289204
   https://bugs.kde.org/show_bug.cgi?id=289204

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Title:
  Rebuilding thumbnails in digiKam is inefficient on multicore systems

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