Ok. Thanks. I really hope my problems are due to an immature driver. After
all support for the 960 was added to the Unix drivers just a month ago.
Patrick, Michael -- Would it be possible for you to check with Nvidia X
Server Settings (nvidia-settings) how much of the GPU memory is used
without any applications launched? It believe the Nvidia Settings is
installed together with the driver.
/Fred
On Sat, Feb 21, 2015 at 10:09 PM, Michael Below <[email protected]> wrote:
> Not exactly, I am working on 24mp files from a D600 using opencl with a
> 750ti and 2gb.
>
> Am 21. Februar 2015 21:52:16 MEZ, schrieb Fearsome <
> [email protected]>:
>>
>> 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 <
>> [email protected]> 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
>>> > <[email protected] <mailto:[email protected]>>
>>> 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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