Am Freitag, 14. November 2014 schrieb Meng, Mengmeng:
> Hi,
Hi,

Ups, I just noticed your response today.

>     The script works OK for me :)   I really appreciate it.
> 
> BTW, there are some error info in the log, does it make sense?
>   [exiv2] Failed to convert Xmp.exif.GPSLatitude to
> Exif.GPSInfo.GPSLatitude [exiv2] Exif tag Exif.PentaxDng.0x0405 not
> encoded

Yes, I've them too, but they are related to metadata handling only. So it 
shouldn't influence the export time at all.

> 
> Except getting dev_process_export time, is there another way to check the
> result is OK[1]?
> 
> [1]the ppm file is right, and opencl really work

Fine. I guess that's all? 

BTW, my times for a GeForce GT 640 and an i7-2600 CPU @ 3.40GHz are:
.. average processing time in sec
sidecarfile: profiled denoise=off
opencl=false:5.38
opencl=true:3.79

sidecarfile: profiled denoise=on
opencl=false:19.75
opencl=true:27.40

So OpenCL will be faster, but not if I use profiled denoise (nlm) on my 
graphics card. Next time I will take another one ;-).
> 
> Thanks,
> Meng
> 
Cheers,
Christian

> -----Original Message-----
> From: Christian Kanzian [mailto:christian.kanz...@gmx.at]
> Sent: Wednesday, November 12, 2014 5:44 AM
> To: darktable-devel@lists.sourceforge.net
> Subject: Re: [darktable-devel] test opencl performance by darktable
> 
> Am Dienstag, 11. November 2014 schrieb Meng, Mengmeng:
> > Hi,
> > In Linux, I want to test opencl performance by darktable
> > automatically. But there are some things confused me, could somebody help
> > me?
> > 
> > In console, I run "darktable  -d opencl -d perf test.jpg[1]". But
> > after done the testing, the progress can't be closed unless using "Ctrl +
> > c". Then I can get 4 kinds time: export, dev_process_thumbnail,
> > dev_process_image and dev_process_preview. Is OpenCL only used in export
> > ? I also see some  info as "opencl_profiling" in dev_process_thumbnail.
> > 
> > 
> > [1]test.jpg is huge file ~8 MB.
> > 
> > 
> > 
> > Thanks,
> > Meng
> 
> Hi,
> 
> I guess you are looking for darktable-cli? Some time ago Tobias suggested
> something like "darktable-cli RAW  RAW.xmp  output.ppm --width 0 --height
> 0 --hq 1-d opencl - d  perf" for testing/benchmarking.
> 
> I tried to create a small bash script arround that for benchmarking.
> However it's far from being perfect. The script processes a single RAW
> file creating a PPM using darktable-cli and calculates the average
> processing time of three runs. Processing time is taken form the darktable
> log file. Different sidecar files could be defined reflecting different
> image developments. Eg. I'm testing profiled denoise on/off. Optional
> OpenCL parametres could be set. As default OpenCL true/false will be
> passed to darktable-cli. So, theoretically the difference can be seen, but
> there is no error handling and testing if opencl really works.
> 
> The script (dt_benchmark.sh), a raw file and 2 sidecarfiles can be found
> here: https://homepage.boku.ac.at/kanzian/darktable
> Just copy everthing in one dir, run dt_benchmark.sh from the consol and
> watch.
> 
> I hope this helps.
> 
> All the best,
> Christian
> 
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