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Cycles render speed regression on 580 GTX GPU with current buildbot
Closed, InvalidPublic

Description

System Information
Operating system and graphics card

Ubuntu 14.04.02 LTS 64bit Geforce GTX 580 using driver 331.113 from nvidia-331-updates

Blender Version
Broken: blender-2.74-a934730-linux-glibc211-i686 (buildbot)
Worked: 2.74 release 64bit

The scene rendered in 5:20 using 2.74 release linux 64bit but takes 20:33 with current buildbot:

274: http://www.pasteall.org/pic/show.php?id=88516
Buildbot: http://www.pasteall.org/pic/show.php?id=88515

Exact steps for others to reproduce the error
Open attached .7z file, unpack, render using GPU.

Details

Type
Bug

Event Timeline

Gottfried Hofmann (gottfried) updated the task description. (Show Details)
Gottfried Hofmann (gottfried) raised the priority of this task from to Needs Triage by Developer.

You're comparing 64bit release with 32bit buildbot version which is not fair comparison. 32bit indeed could much slower on GPU.

I can not confirm speed regression when using 64bit buildbot version so unless someone can see speed regression in builds of same bitness considering this report as invalid.