Hi,
recent versions of darktable only export one image at a time. Therefore
only the first GPU gets used. In your case it's probably the faster one,
so all is good.
In the past darktable would allow to have a user selectable number of
parallel export jobs. However, this has been deprecated for two reasons.
Firstly, no speed gain on the CPU is to be expected as darktable heavily
uses parallel processing already within each export job. Secondly, each
export job "instance" consumes high amounts of system memory and we
experienced users getting into out-of-memory situations frequently.
Ulrich
Am 14.08.2016 um 21:00 schrieb Aleksey Kunitskiy:
Hi all,
I'm trying to utilize all of my two GPUs in the system installed with
darktable. While I see that they're somehow both used while I use
lightroom, I can't catch any activity of the second GPU while exporting
series of images:
[opencl_init] here are the internal numbers and names of OpenCL devices
available to darktable:
[opencl_init] 0 'GeForce GTX 550 Ti'
[opencl_init] 1 'GeForce GTS 450'
[opencl_init] these are your device priorities:
[opencl_init] image preview export thumbnail
[opencl_init] 0 1 0 0
[opencl_init] 1 -1 1 1
[opencl_init] FINALLY: opencl is AVAILABLE on this system.
[pixelpipe_process] [export] using device 0
[pixelpipe_process] [export] using device 0
[pixelpipe_process] [export] using device 0
[pixelpipe_process] [export] using device 0
[opencl_summary_statistics] device 'GeForce GTX 550 Ti': 7240 out of 7240
events were successful and 0 events lost
[opencl_summary_statistics] device 'GeForce GTS 450': NOT utilized
Does anybody know what is wrong with my setup?
My configuration of opencl is as follows:
opencl=TRUE
opencl_async_pixelpipe=TRUE
opencl_avoid_atomics=false
opencl_checksum=1643215135
opencl_device_priority=*/!0,*/*/*
opencl_library=
opencl_memory_headroom=512
opencl_memory_requirement=768
opencl_micro_nap=1000
opencl_number_event_handles=25
opencl_omit_whitebalance=false
opencl_runtime=
opencl_size_roundup=16
opencl_synch_cache=false
opencl_use_cpu_devices=false
opencl_use_events=true
opencl_use_pinned_memory=false
parallel_export=4
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