On 2018-10-25 16:02, Michael Kefeder wrote:
According to the docs the previews (second section) are built in
parallel to other actions. So lets suppose you are in darkroom mode
doing stuff it would compete for the same resource (the dedicated gpu)
with the previews still being made parallel. therefore I force both
gpus to be unused which makes the CPU do the previews freeing my GPU
to help with the stuff where I need the speed.
I hope I do the docs justice, that's how I interpreted it and also saw
when running benchmarks/tests - I could be mistaken. In the docs
example however they also disable the gpu in the second section, so I
am fairly sure this is how it's best.
I appreciate your help! Forcing to Nvidia vs Intel accelerated
significantly the speed for me.
Regards,
B
Am Fr., 26. Okt. 2018 um 00:50 Uhr schrieb I. Ivanov <[email protected]
<mailto:[email protected]>>:
On 2018-10-25 15:27, Michael Kefeder wrote:
> Hi
>
> I have the same issue on mac, I use
> opencl_device_priority=1,!0/!0,!1/1,!0/1,!0
> and important: opencl_scheduling_profile=default else the priority
> seems to be ignored. With these it never tries to use the Intel
GPU (0
> on my machine).
Thank you! This works!
One question - is there a reason why not
opencl_device_priority=1,!0/_1,!0_/1,!0/1,!0
Looks like you are forcing explicitly 1 and forbidding explicitly
0 but
the second group you are forbidding both. Is this beneficial? why?
>
> hth
> mike
>
Thank you,
B
>
>
> Am Fr., 26. Okt. 2018 um 00:13 Uhr schrieb I. Ivanov
<[email protected] <mailto:[email protected]>
> <mailto:[email protected] <mailto:[email protected]>>>:
>
> Hi Guys,
>
> I am experimenting on a new windows machine. Win 10 - DT 2.4.4
>
> GPU Intel UHD Graphics 630 and NVIDIA Quadro P1000
>
> I have read and tried
>
https://www.darktable.org/usermanual/en/darktable_and_opencl_multiple_devices.html
>
> However - no matter what I do - it looks like DT *always*
defaults
> and
> heavily utilizes the Intel Graphics 630.
>
> The result is - no benefit at all when using open CL. In
fact - using
> CPU is about 30% faster (if my tests were correct) than using
> Intel GPU.
>
> Meanwhile Nvidia is present but does nothing. 1-5% utilization.
>
> This "darktable -d opencl" does not do anything on windows -
> simply blank.
>
> So I identified the cards with "darktable-cltest.exe"
>
> Setting device preferences - I tried both with the name of the
> cards and
> also by number - 0 or 1.
>
> Sadly - regardless what I did - I was unable to force DT to use
> Nvidia.
>
> Can anybody help with this please?
>
> Regards,
>
> B
>
>
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