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# cannot execute: gpu_malloc
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Example of error:
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```
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GPU ERROR: ip[154]: cannot execute: gpu_malloc(NXY*nwfip*2*sizeof(cufftDoubleComplex), (void **)&d_wf_d_dy)
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file=`/gs/hs1/hp190063/share/wslda/hpc-engine/cpca.c`, line=602
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Error=2
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Exiting!
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```
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This type error indicates that there is not enough memory to run the code.
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*Solution*: increase the number of GPUs.
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*Note*: you can use [td-memory.py](https://gitlab.fizyka.pw.edu.pl/gabrielw/wslda/-/blob/public/tools/td-memory.py) to estimate the number of required GPUs for your problem. |
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\ No newline at end of file |
