# GPU out of memory? **URL:** \ **Category:** Just Starting\ **Created:** [29 July 2016 02:53 UTC](https://pyfr.discourse.group/t/gpu-out-of-memory/114 "2016-07-29T02:53:23Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Arif\_Andira](https://avatars.discourse-cdn.com/v4/letter/a/2acd7d/32.png) [@Arif\_Andira](https://pyfr.discourse.group/u/Arif_Andira)\ **Post date:** [29 July 2016 02:53 UTC](https://pyfr.discourse.group/t/gpu-out-of-memory/114/1 "2016-07-29T02:53:23Z")
Dear PyFR Developer, I’ve downloaded the 3d case which is uploaded at [example datasets](https://pyfr.discourse.group/t/example-datasets/57/2). When I ran using cuda backend, it gives an error message like this : `[andiraarif@localhost Benchmark Problem]$ pyfr run -b cuda -p cube_hex24.pyfrm config.ini` ```auto Traceback (most recent call last): File "/usr/bin/pyfr", line 9, in load_entry_point('pyfr==1.4.0', 'console_scripts', 'pyfr')() File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/scripts/main.py", line 109, in main File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/scripts/main.py", line 230, in process_run File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/scripts/main.py", line 214, in _process_common File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/solvers/ __init__.py", line 14, in get_solver File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/integrators/ __init__.py", line 26, in get_integrator File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/integrators/controllers.py", line 15, in __init__ File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/integrators/steppers.py", line 9, in __init__ File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/integrators/base.py", line 41, in __init__ File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/solvers/base/system.py", line 52, in __init__ File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/solvers/base/system.py", line 110, in _load_int_inters File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/solvers/navstokes/inters.py", line 13, in __init__ File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/solvers/baseadvecdiff/inters.py", line 12, in __init__ File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/solvers/baseadvec/inters.py", line 24, in __init__ File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/solvers/base/inters.py", line 56, in _const_mat File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/backends/base/backend.py", line 17, in newfn File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/backends/base/backend.py", line 117, in const_matrix File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/backends/base/types.py", line 138, in __init__ File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/backends/base/types.py", line 62, in __init__'metaclass' entry removed. If no kwds argument is passed in, this will File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/backends/base/backend.py", line 57, in malloc File "/usr/lib/python3.4/site-packages/pyfr-1.4.0-py3.4.egg/pyfr/backends/cuda/base.py", line 82, in _malloc_impl pycuda._driver.MemoryError: cuMemAlloc failed: out of memory ``` What’s wrong with this calculation? What memory in computer is used to perform GPU computing using CUDA Backend ? Fyi I used NVIDIA GeForce GTX460 GDDR5 1GB and 16GB RAM ---
**Author:** ![p.vincent](https://yyz2.discourse-cdn.com/free1/user_avatar/pyfr.discourse.group/p.vincent/32/225_2.png) [@p.vincent](https://pyfr.discourse.group/u/p.vincent)\ **Post date:** [29 July 2016 03:38 UTC](https://pyfr.discourse.group/t/gpu-out-of-memory/114/2 "2016-07-29T03:38:27Z")
Hi Arif, > What’s wrong with this calculation? It seems you are running out of (GPU) memory. > What memory in computer is used to perform GPU computing using CUDA Backend ? GPU memory. In your case 1GB. You can try lowering the order in the .ini fee and see if it launches. Cheers Peter ---
**Author:** ![Arif\_Andira](https://avatars.discourse-cdn.com/v4/letter/a/2acd7d/32.png) [@Arif\_Andira](https://pyfr.discourse.group/u/Arif_Andira)\ **Post date:** [29 July 2016 04:07 UTC](https://pyfr.discourse.group/t/gpu-out-of-memory/114/3 "2016-07-29T04:07:25Z")
Thanks a lot Dr Peter E Vincent, glad to get the answer from you. It works with second and third order. Does it mean that cuda backend cannot solve the relatively heavy case with 1 GB GPU memory ? May i ask you something else? Can i run PyFR with multi-core in single processor ( in this case i use 1 CPU Intel i7 with 8 cores(4cores hyperthreading)) + GPU ( Nvidia GTX460 ) simultaneously?What configuration and command do i have to type? I have read the user guide, and i’m still confused about running in this mode. Thank you 🙂 ---
**Author:** ![Zach\_Davis1](https://avatars.discourse-cdn.com/v4/letter/z/3ec8ea/32.png) [@Zach\_Davis1](https://pyfr.discourse.group/u/Zach_Davis1)\ **Post date:** [29 July 2016 13:14 UTC](https://pyfr.discourse.group/t/gpu-out-of-memory/114/4 "2016-07-29T13:14:48Z")
Hi Arif, Freddie has answered how to go about setting up a heterogeneous run using both CPU and GPU configurations in the PyFR mailing list. The thread with detailed instructions can be found at: [https://groups.google.com/forum/#!topic/pyfrmailinglist/3-WhWBeH2ok](https://groups.google.com/forum/#!topic/pyfrmailinglist/3-WhWBeH2ok) Best Regards, Zach