Turn Off OpenCL - Performance Sky Rockets...

I have dreading using DT each time I have a new batch for the sole reason of startup speed and filter/collections speed (over a minute for every folder change. Then I made two changes and wow what a speedup:

Windows 10 (latest update), 32G DDR4 Quad Channel RAM, M2 SSD, i7 6800K 6/12 Cores, RTX 2060 (latest NVIDIA drivers), OpenCL (latest installed), 699,637 photos - 5.18 TB

  1. Use RAW file instead of embedded JPEG from size = never (startup speed increase).
  2. Activate OpenCL support = unchecked (startup speed increased, changing collections/folders speed increased).

Number change above I completely understand why the speed increase (also solved my pink highlights problem). Number 2 has got me stumped… Isn’t OpenCL supposed to speed things up?

What in my OpenCL setting screwed things up?

What video driver do you have installed?

Latest NVIDIA

Unrestricted is not always a good option… try large and default for starters… you could also go and delete your opencl kernels and let DT rebuild them… I’ll dig up the location…

Edit:

C:\Users\yourusername\AppData\Local\Microsoft\Windows\INetCache\darktable

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You didn’t get rid of the pink highlight you just have hidden it by using the on camera jpeg. I bet that if you go to darkroom you’ll get the same old rendering. No magic!

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All you suggested done and OpenCL and all aspects of DT are back to top speed thank you!

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True of course, but highlight reconstruction is still to the rescue!

can you post the output of darktable-cltest?

Here are the results

dtcltest.txt (3.3 KB)

It shows that you have:
PINNED MEMORY TRANSFER: WANTED
MEMORY TUNING: WANTED

your post above shows that you selected no tuning. Keep it at no tuning.

Thank you for checking

There are some good posts about the magenta highlights if you search the thread. You may have already read them. Sometimes in the highlights reconstruction module I need to lower the threshold value to fix the problem. All very easy once you know about this fix. I am glad your OpenCL issues are fixed.

I have a separate thread on the magenta/blown green pixels problem and good resolution.

Can you share the thread? I am open to learning new tricks.

Here is the link:

Your the last poster on the thread :slight_smile:

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