| Re: GPULIB and ENVI 4.8 [message #75025] |
Mon, 14 February 2011 06:46 |
Mort Canty
Messages: 134
Registered: March 2003
|
Senior Member |
|
|
Am 14.02.2011 13:18, schrieb chris:
> BTW, I also use some of your well programmed remote sensing routines.
>
Glad to hear it :)
Mort
|
|
|
|
| Re: GPULIB and ENVI 4.8 [message #75026 is a reply to message #75025] |
Mon, 14 February 2011 04:18  |
rogass
Messages: 200
Registered: April 2008
|
Senior Member |
|
|
On 14 Feb., 09:01, mort canty <m.ca...@fz-juelich.de> wrote:
> Am 14.02.2011 08:37, schrieb chris:
>
>
>
>
>
>
>
>
>
>> Hi folks,
>> if someone wants to use GPULib and Envi 4.8 commonly, then I have an
>> installation hint for you (which mostly of you will know) . On my
>> Windows 7 x64 machine I have to change (or to set) the path variables
>> from:
>> IDL_PATH = +C:\Program Files\Tech-X\GPULib to:
>> IDL_PATH = +C:\Program Files\Tech-X\GPULib;<IDL_DEFAULT>
>
>> as well as from:
>
>> IDL_DLM_PATH = +C:\Program Files\Tech-X\GPULib\lib to:
>> IDL_DLM_PATH = +C:\Program Files\Tech-X\GPULib\lib;<IDL_DEFAULT>
>
>> As Michael stated here (https://groups.google.com/group/comp.lang.idl-
>> pvwave/browse_thread/thread/89a871c7693bd71e/070b65fe34f70c3 b?
>> hl=de&lnk=gst&q=gpulib#070b65fe34f70c3b) there is a preferences
>> hierarchy. These path variables are not set by an ENVI 4.8
>> installation, so it's important to give IDL and ENVI the specific
>> directories in the same hierarchy level since GPULib won't work
>> properly if these setting were not made.
>
>> Regards
>
>> Chris
>
> Hi Chris,
>
> I've installed it with ENVI 4.8/IDL 8.0 too and it runs like a charm.
> I'd be interested to know how you're using it, e.g., area of
> application, speedups, etc.
>
> Cheers
>
> Mort
Hi Mort,
I'm using it in Remote Sensing and Image Processing, e.g. convolving a
2000x2000 sized image by a 100x100 sized kernel is 6 times faster by
GPU FFT compared to 'classic' FFT on my Dell Precision M4400 laptop.
Besides, the time consumption for the GPU FFT on my laptop is similar
to one of our server with about 40 GHz :)
Unfortunately, I have always to decide beforehand whether it will fit
in the GPU memory or not. So, if you have large matrices where you
really benefit GPU computing you are limited to available GPU memory.
To overcome this limitation, we bought something like a 'GPU
supercomputer' which has 2 very fast TESLA cards and 6 GB GPU memory.
We will test next time, what speedups we can achieve if we simulate,
e.g., spectra or sensors - here at GFZ Potsdam. I hope, that ITT and
Tech-X will integrate GPU computing facilities in future ENVI and IDL
versions, so we don't have to care on GPU related programming syntax.
BTW, I also use some of your well programmed remote sensing routines.
Cheers,
CR
|
|
|
|
| Re: GPULIB and ENVI 4.8 [message #75029 is a reply to message #75026] |
Mon, 14 February 2011 00:01 |
Mort Canty
Messages: 134
Registered: March 2003
|
Senior Member |
|
|
Am 14.02.2011 08:37, schrieb chris:
> Hi folks,
> if someone wants to use GPULib and Envi 4.8 commonly, then I have an
> installation hint for you (which mostly of you will know) . On my
> Windows 7 x64 machine I have to change (or to set) the path variables
> from:
> IDL_PATH = +C:\Program Files\Tech-X\GPULib to:
> IDL_PATH = +C:\Program Files\Tech-X\GPULib;<IDL_DEFAULT>
>
> as well as from:
>
> IDL_DLM_PATH = +C:\Program Files\Tech-X\GPULib\lib to:
> IDL_DLM_PATH = +C:\Program Files\Tech-X\GPULib\lib;<IDL_DEFAULT>
>
> As Michael stated here (https://groups.google.com/group/comp.lang.idl-
> pvwave/browse_thread/thread/89a871c7693bd71e/070b65fe34f70c3 b?
> hl=de&lnk=gst&q=gpulib#070b65fe34f70c3b) there is a preferences
> hierarchy. These path variables are not set by an ENVI 4.8
> installation, so it's important to give IDL and ENVI the specific
> directories in the same hierarchy level since GPULib won't work
> properly if these setting were not made.
>
> Regards
>
> Chris
Hi Chris,
I've installed it with ENVI 4.8/IDL 8.0 too and it runs like a charm.
I'd be interested to know how you're using it, e.g., area of
application, speedups, etc.
Cheers
Mort
|
|
|
|
comp.lang.idl-pvwave archive
Members
Search
Help
Login
Home
