Running only DT makes no difference. Nvidia X Server Settings tells me that
in this case I can get the memory usage down to ~270 MB, which agrees
nicely with the default headroom parameter for DT's OpenCL settings. But I
still get the -5 error with the 60D CR2 file.
(Interestingly, launching Firefox with a few tabs makes GPU memory usage
increase to ~370 MB.)
So out of curiosity, is there someone out there who successfully edits and
exports 18 MP images with OpenCL activated on a 2 GB Nvidia GPU? This
resolution corresponds to, e.g., a Canon 60D (5198 x 3462 px).
Fred
On Sat, Feb 21, 2015 at 9:35 AM, Ulrich Pegelow <ulrich.pege...@tongareva.de
> wrote:
> Well, the main problem with OpenCL is the fact that there is no way to
> know what amount of GPU memory is factually available at a time. In your
> case I suspect that there is some other application running which
> reserves quite some amount even if it may not use it continuously
> (geeqie has been identified in the past as one candidate).
>
> So you should first try again with as few other applications as possible
> running in parallel.
>
> Ulrich
>
> Am 20.02.2015 um 22:39 schrieb Fearsome:
> > Ulrich, thanks for your suggestions.
> >
> > I've tried various settings for the two parameters you mentioned, but to
> > no avail. For the number of event handles I tried 15 and 5, and for the
> > headroom I tried 500 and 30. My defaults were 25 and 300, respectively.
> > The out of resources error is encountered for the base curve module, in
> > every case.
> >
> > I also tried processing CR2 files from other cameras than the 40D. The
> > export for a file from a 50D went splendid, without any hick-ups in the
> > OpenCL processing. The 50D's resolution is 1 MP less than that of the
> > X100T. The export from a 60D did not go so well, however. The 60D's
> > resolution is larger than that of the X100T by ~4 MP. The error was
> > different this time, giving no reference to a specific module but
> > instead referring to the copy-back:
> >
> > [opencl_pixelpipe (c)] late opencl error detected while copying back to
> > cpu buffer: -5
> >
> > What does this mean? If the image was possible to transfer to the GPU,
> > it should be possible to transfer _from_ the GPU.
> >
> > From inspection of the X100T opencl export log, it seems like the whole
> > image is transferred in one piece to the GPU and thus tiling is not
> > possible. Then I suspect the whole pipe is redone on the CPU if there is
> > a error from one of the modules on the GPU, which really hurts. Is it
> > possible in the future to apply tiling for the GPU as well to avoid
> > these problems?
> >
> > Any further thoughts on how I can enable error-free offloading to the
> > GPU would be highly appreciated. Or is this just the way it is?
> >
> > /Fred
> >
> >
> > On Fri, Feb 20, 2015 at 6:49 AM, Ulrich Pegelow
> > <ulrich.pege...@tongareva.de <mailto:ulrich.pege...@tongareva.de>>
> wrote:
> >
> > Hi,
> >
> > that's not an X-Trans related error. In fact the specific demosaic
> > algorithms for the X-Trans sensor are not (yet) ported to OpenCL and
> > always run on the CPU.
> >
> > The error you see is code -5: "out of resources". Have a look into
> the
> > user manual for some ideas what to do. You most likely need to tune
> one
> > of the config parameters opencl_number_event_handles or
> > opencl_memory_headroom.
> >
> > Best wishes
> >
> > Ulrich
> >
> > Am 19.02.2015 um 22:51 schrieb Fearsome:
> > > Hi,
> > >
> > > I'm trying to set up OpenCL and I thought I had succeeded. It
> works
> > > nicely for exporting Canon CR2 files but for RAF files from a
> X100T
> > > there are errors in the OpenCL profiling output from DT. The
> export
> > > seems to fall back to the CPU for some, to unknown, reason. A log
> > of the
> > > output is attached. I would appreciate any help in understanding
> > what's
> > > happening and whether I've set up OpenCL properly or not.
> > >
> > > I'm running DT 1.6.2 on Ubuntu 14.10 with a Geforce GTX 960
> > installed.
> > >
> > > Cheers,
> > >
> > > Fred
> > >
> >
>
>
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