Hi Ulrich,
Test on a ATI Tahiti XT (7870 XT 2Go) with a picture 5196 * 3462 pixel
size (18Mbit)
For me, i can't see any difference on the picture. (but file size is 2
Ko diff) (every time a exporting a file i never have the exactly same
size of the file)
For performance,
Yes it's better for me only on Read Buffer (from device to host), we can
see real difference time (from 0.0490 seconds to 0.0006)
But a slower on Read Image (from device to host) (from 0.3329 seconds to
0.2353 seconds)
> So it's slower for this test.
My "test protocol" :
With opencl_use_pinned_memory=true
open darktable, Go to darkroom, export , exit
/opt/darktable/bin/darktable -d perf -d opencl > /tmp/true
grep opencl_profiling /tmp/true | grep from > /tmp/true2
[opencl_profiling] spent 0.0198 seconds in [Write Image (from host to
device)]
[opencl_profiling] spent 0.0170 seconds in [Read Image (from device to
host)]
[opencl_profiling] spent 0.0002 seconds in [Read Buffer (from device to
host)]
[opencl_profiling] spent 0.0117 seconds in [Write Image (from host to
device)]
[opencl_profiling] spent 0.0207 seconds in [Read Image (from device to
host)]
[opencl_profiling] spent 0.2180 seconds in [Write Image (from host to
device)]
[opencl_profiling] spent 0.2353 seconds in [Read Image (from device to
host)]
[opencl_profiling] spent 0.0006 seconds in [Read Buffer (from device to
host)]
opencl_use_pinned_memory=false
open darktable, Go to darkroom, export , exit
[opencl_profiling] spent 0.0193 seconds in [Write Image (from host to
device)]
[opencl_profiling] spent 0.0170 seconds in [Read Image (from device to
host)]
[opencl_profiling] spent 0.0002 seconds in [Read Buffer (from device to
host)]
[opencl_profiling] spent 0.0129 seconds in [Write Image (from host to
device)]
[opencl_profiling] spent 0.0165 seconds in [Read Image (from device to
host)]
[opencl_profiling] spent 0.2267 seconds in [Write Image (from host to
device)]
[opencl_profiling] spent 0.3329 seconds in [Read Image (from device to
host)]
[opencl_profiling] spent 0.0490 seconds in [Read Buffer (from device to
host)]
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