[Darktable-users] Fwd: Re: Decode performance information

Tue, 29 Apr 2014 09:27:34 -0700 


Should have also gone to the list.

-------- Original Message --------
Subject:        Re: [Darktable-users] Decode performance information
Date:   Tue, 29 Apr 2014 18:24:47 +0200
From:   Max Killer <[email protected]>
To:     Gonçalo Marrafa <[email protected]>



On Tue 29 Apr 2014 03:17:30 PM CEST, Gonçalo Marrafa wrote:

Hi.

I've been trying to measure my DT performance with and without OpenCL,
to evaluate its benefits. My GPU is a Radeon HD 8790M and i'm on
Ubuntu 14.04 64 bit. I'm doing this test because the proprietary
drivers are not very stable and the open source ones are much more,
but don't have OpenCL support.

This is a very basic test, perhaps not a very meaningful one. If so
please tell how to do it properly. I opened the same image, with a
little processing, denoising, sharpening, color correction, highlight
recovery, etc., in darkroom and zoom to 100% then zoom back out. I did
the test with OpenCL enabled and disabled. Although i see the numbers
are greater without OpenCL, i can't really understand them and would
like a little help from you guys.

Below are excerpts of the output of darktable -d perf:

*With* OpenCL:

[dev] took 0,000 secs (0,000 CPU) to load the image.
[dev_pixelpipe] took 0,007 secs (0,016 CPU) initing base buffer [full]
[dev_pixelpipe] took 0,001 secs (0,002 CPU) processing `white balance'
[full]
[dev_pixelpipe] took 0,001 secs (0,001 CPU) processing `highlight
reconstruction' [full]
[dev_pixelpipe] took 0,001 secs (0,001 CPU) processing `demosaic' [full]
[dev_pixelpipe] took 0,443 secs (0,013 CPU) processing `denoise
(profiled)' [full]
[dev_pixelpipe] took 0,111 secs (0,002 CPU) processing `denoise
(profiled)' [full]
[dev_pixelpipe] took 0,002 secs (0,000 CPU) processing `base curve' [full]
[dev_pixelpipe] took 0,002 secs (0,000 CPU) processing `input color
profile' [full]
[dev_pixelpipe] took 0,001 secs (0,000 CPU) processing `vibrance' [full]
[dev_pixelpipe] took 0,019 secs (0,000 CPU) processing `shadows and
highlights' [full]
[dev_pixelpipe] took 0,002 secs (0,000 CPU) processing `color zones'
[full]
[dev_pixelpipe] took 0,003 secs (0,000 CPU) processing `tone curve' [full]
[dev_pixelpipe] took 0,053 secs (0,038 CPU) processing `sharpen' [full]
[dev_pixelpipe] took 0,002 secs (0,000 CPU) processing `output color
profile' [full]
[dev_pixelpipe] took 0,001 secs (0,000 CPU) processing `velvia' [full]
[dev_pixelpipe] took 0,001 secs (0,000 CPU) processing `vignetting' [full]
[dev_pixelpipe] took 0,001 secs (0,000 CPU) processing `overexposed'
[full]
[dev_pixelpipe] took 0,021 secs (0,024 CPU) processing `gamma' [full]
[dev_process_image] pixel pipeline processing took 0,675 secs (0,102 CPU)
[dev] took 0,000 secs (0,000 CPU) to load the image.
[dev_pixelpipe] took 0,000 secs (0,000 CPU) initing base buffer [full]
[dev_pixelpipe] took 0,004 secs (0,004 CPU) processing `white balance'
[full]
[dev_pixelpipe] took 0,003 secs (0,003 CPU) processing `highlight
reconstruction' [full]
[dev_pixelpipe] took 0,002 secs (0,001 CPU) processing `demosaic' [full]
[dev_pixelpipe] took 0,030 secs (0,001 CPU) processing `denoise
(profiled)' [full]
[dev_pixelpipe] took 0,115 secs (0,001 CPU) processing `denoise
(profiled)' [full]
[dev_pixelpipe] took 0,001 secs (0,000 CPU) processing `base curve' [full]
[dev_pixelpipe] took 0,002 secs (0,000 CPU) processing `input color
profile' [full]
[dev_pixelpipe] took 0,001 secs (0,000 CPU) processing `vibrance' [full]
[dev_pixelpipe] took 0,017 secs (0,000 CPU) processing `shadows and
highlights' [full]
[dev_pixelpipe] took 0,002 secs (0,000 CPU) processing `color zones'
[full]
[dev_pixelpipe] took 0,002 secs (0,000 CPU) processing `tone curve' [full]
[dev_pixelpipe] took 0,032 secs (0,018 CPU) processing `sharpen' [full]
[dev_pixelpipe] took 0,002 secs (0,000 CPU) processing `output color
profile' [full]
[dev_pixelpipe] took 0,001 secs (0,000 CPU) processing `velvia' [full]
[dev_pixelpipe] took 0,001 secs (0,000 CPU) processing `vignetting' [full]
[dev_pixelpipe] took 0,001 secs (0,000 CPU) processing `overexposed'
[full]
[dev_pixelpipe] took 0,019 secs (0,014 CPU) processing `gamma' [full]
[dev_process_image] pixel pipeline processing took 0,238 secs (0,046 CPU)


And *without* OpenCL:

[dev] took 0,000 secs (0,000 CPU) to load the image.
[dev_pixelpipe] took 0,012 secs (0,021 CPU) initing base buffer [full]
[dev_pixelpipe] took 0,001 secs (0,006 CPU) processing `white balance'
[full]
[dev_pixelpipe] took 0,001 secs (0,004 CPU) processing `highlight
reconstruction' [full]
[dev_pixelpipe] took 0,010 secs (0,045 CPU) processing `demosaic' [full]
[dev_pixelpipe] took 0,752 secs (5,576 CPU) processing `denoise
(profiled)' [full]
[dev_pixelpipe] took 0,258 secs (1,777 CPU) processing `denoise
(profiled)' [full]
[dev_pixelpipe] took 0,004 secs (0,019 CPU) processing `base curve' [full]
[dev_pixelpipe] took 0,004 secs (0,014 CPU) processing `input color
profile' [full]
[dev_pixelpipe] took 0,004 secs (0,019 CPU) processing `vibrance' [full]
[dev_pixelpipe] took 0,028 secs (0,105 CPU) processing `shadows and
highlights' [full]
[dev_pixelpipe] took 0,021 secs (0,128 CPU) processing `color zones'
[full]
[dev_pixelpipe] took 0,003 secs (0,020 CPU) processing `tone curve' [full]
[dev_pixelpipe] took 0,069 secs (0,153 CPU) processing `sharpen' [full]
[dev_pixelpipe] took 0,007 secs (0,039 CPU) processing `output color
profile' [full]
[dev_pixelpipe] took 0,003 secs (0,024 CPU) processing `velvia' [full]
[dev_pixelpipe] took 0,008 secs (0,057 CPU) processing `vignetting' [full]
[dev_pixelpipe] took 0,004 secs (0,004 CPU) processing `overexposed'
[full]
[dev_pixelpipe] took 0,002 secs (0,015 CPU) processing `gamma' [full]
[dev_process_image] pixel pipeline processing took 1,194 secs (8,025 CPU)
[dev] took 0,000 secs (0,000 CPU) to load the image.
[dev_pixelpipe] took 0,000 secs (0,000 CPU) initing base buffer [full]
[dev_pixelpipe] took 0,014 secs (0,052 CPU) processing `white balance'
[full]
[dev_pixelpipe] took 0,019 secs (0,083 CPU) processing `highlight
reconstruction' [full]
[dev_pixelpipe] took 0,016 secs (0,077 CPU) processing `demosaic' [full]
[dev_pixelpipe] took 0,133 secs (0,760 CPU) processing `denoise
(profiled)' [full]
[dev_pixelpipe] took 0,175 secs (1,150 CPU) processing `denoise
(profiled)' [full]
[dev_pixelpipe] took 0,003 secs (0,017 CPU) processing `base curve' [full]
[dev_pixelpipe] took 0,004 secs (0,019 CPU) processing `input color
profile' [full]
[dev_pixelpipe] took 0,004 secs (0,017 CPU) processing `vibrance' [full]
[dev_pixelpipe] took 0,026 secs (0,104 CPU) processing `shadows and
highlights' [full]
[dev_pixelpipe] took 0,026 secs (0,134 CPU) processing `color zones'
[full]
[dev_pixelpipe] took 0,003 secs (0,017 CPU) processing `tone curve' [full]
[dev_pixelpipe] took 0,033 secs (0,109 CPU) processing `sharpen' [full]
[dev_pixelpipe] took 0,009 secs (0,048 CPU) processing `output color
profile' [full]
[dev_pixelpipe] took 0,003 secs (0,013 CPU) processing `velvia' [full]
[dev_pixelpipe] took 0,021 secs (0,090 CPU) processing `vignetting' [full]
[dev_pixelpipe] took 0,003 secs (0,003 CPU) processing `overexposed'
[full]
[dev_pixelpipe] took 0,002 secs (0,010 CPU) processing `gamma' [full]
[dev_process_image] pixel pipeline processing took 0,495 secs (2,703 CPU)


Thanks in advance.

Best regards

Gonçalo Marrafa


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Hello Gonçalo,

while I understand your quest here, maybe you are looking too much at
the numbers.
Just work with dt with and without opencl (with "--disable-opencl"). If
you think that the speed is still "good" without opencl then use the
better oss drivers. But if you feel that the gui is slower and you
don't enjoy working this way, reenable opencl and don't use the oss
drivers.

In my opinion the question is more severe with a big screen and if you
cannot wait for the final export. Because as long as you are working
with the gui, a downscaled version of your image is presented. But this
also depends on the source images.

tl;dr: Just try dt without opencl for some time and don't trust the
numbers....

hal




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Instantly run your Selenium tests across 300+ browser/OS combos.  Get 
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