Bug 401981

Summary:	"Use all cores" opens n threads but they running all at one core
Product:	[Applications] digikam	Reporter:	lutz.labusch
Component:	BatchQueueManager-Core	Assignee:	Digikam Developers <digikam-bugs-null>
Status:	RESOLVED NOT A BUG
Severity:	normal	CC:	caulier.gilles, metzpinguin
Priority:	NOR
Version:	5.9.0
Target Milestone:	---
Platform:	openSUSE
OS:	Linux
Latest Commit:		Version Fixed In:	7.5.0

Description lutz.labusch 2018-12-10 21:54:24 UTC

Hi,

if i switch on the option "use all cores" in the behavior tab, the programm opens 32 threads, which is the number of the available threads, but all of them running at one core (visible at ksysguard and htop).

System is Opensuse Leap 15, fresh install, only amdgpu-pro for the opencl stack is installed. Digikam 5.9, KDE-Plasma 5.12.6, KDE-Framework 5.45.0, Qt 5.9.4.

Thanks and regards!

This behavior is reproducible at my side. 
But was not observed at Kubuntu 18.04 with Digikam 5.6

Comment 1 Maik Qualmann 2018-12-11 07:08:46 UTC

Gilles, can you reproduce it with digiKam-6.0.0-beta3? here with me all cores are used.

Maik

Comment 2 lutz.labusch 2018-12-12 21:19:19 UTC

Hi,

I tested bare installations of OpenSuse Leap 15 and Tumbleweed in VirtualBox.

Leap 15 behaves like described
Tumbleweed behaves as expected, all cores running.
Kubuntu 18.04 behaves like expected.

Comment 3 Maik Qualmann 2018-12-12 21:26:28 UTC

Strange..., Can you test the current AppImage under OpenSuse Leap 15?

https://files.kde.org/digikam/

Maik

Comment 4 lutz.labusch 2018-12-12 21:42:16 UTC

I tried both

6.0.0-beta3.appimage and 5.9.0-01appimage.

Both quits with "memory access error"

Lutz

Comment 5 caulier.gilles 2018-12-12 22:13:08 UTC

No i cannot reproduce this dysfunction, with AppImage or with system compiled version.

Gilles

Comment 6 lutz.labusch 2018-12-16 21:32:41 UTC

https://bugzilla.opensuse.org/show_bug.cgi?id=1119469

The solution from this error solves the problem.