Problems with MCX/CUDA

[Demian Augusto Vera]

HI! 
I'm having some troubles running MCXLab (in Matlab 2017a, Windows 10, 64 bits, NVidia GeForce GTX 480). When I run any of the examples, this occurs:

- variant name: [Fermi] compiled by nvcc [7.5] with CUDA [7050]

- compiled with: RNG [xorshift128+] with Seed Length [4]

GPU=1 (GeForce GTX 480) threadph=4340 extra=6400 np=100000000 nthread=23040 maxgate=1 repetition=1

initializing streams ... MCXLAB ERROR -13 in unit mcx_core.cu:2079: invalid device symbol

Error from thread (0): invalid device symbol

C++ Error: MCXLAB Terminated due to an exception!


If I run  gpuinfo=mcxlab('gpuinfo'):

=============================   GPU Infomation  ================================

Device 1 of 1: GeForce GTX 480

Compute Capability: 2.0

Global Memory: 1610612736 B

Constant Memory: 65536 B

Shared Memory: 49152 B

Registers: 32768

Clock Speed: 1.40 GHz

Number of SMs: 15

Number of Cores: 480

Auto-thread: 23040

Auto-block: 192

I've never get this error in other PCs that I use. I also tried different binaries (several compilation, nightly build, etc). 
Any idea of what's happening?

Thanks!

Best,
Demián.

[Fang, Qianqian]

On 9/8/21 11:18 AM, Demian Augusto Vera wrote:

HI! 
I'm having some troubles running MCXLab (in Matlab 2017a, Windows 10, 64 bits, NVidia GeForce GTX 480). When I run any of the examples, this occurs:

GTX 480 (fermi architecture) is too old for most of the newly released binaries. As a matter of fact, CUDA 9 dropped the support for fermi and the lowest architecture it supports is Kepler. We have switched to CUDA 9 over a year ago.

there are possibly two ways to get around.

first, try one of our older releases, say 2018 or earlier.

alternatively, download cuda toolkit 7.5 on your own machine and build mcx locally. The mcx's code should still compatible with fermi, but I can't be certain because we stopped testing on fermi several years ago.

- variant name: [Fermi] compiled by nvcc [7.5] with CUDA [7050]

- compiled with: RNG [xorshift128+] with Seed Length [4]

GPU=1 (GeForce GTX 480) threadph=4340 extra=6400 np=100000000 nthread=23040 maxgate=1 repetition=1

initializing streams ... MCXLAB ERROR -13 in unit mcx_core.cu:2079: invalid device symbol

Error from thread (0): invalid device symbol

C++ Error: MCXLAB Terminated due to an exception!


If I run  gpuinfo=mcxlab('gpuinfo'):

=============================   GPU Infomation  ================================

Device 1 of 1: GeForce GTX 480

Compute Capability: 2.0

Global Memory: 1610612736 B

Constant Memory: 65536 B

Shared Memory: 49152 B

Registers: 32768

Clock Speed: 1.40 GHz

Number of SMs: 15

Number of Cores: 480

Auto-thread: 23040

Auto-block: 192

I've never get this error in other PCs that I use. I also tried different binaries (several compilation, nightly build, etc). 
Any idea of what's happening?

Thanks!

Best,
Demián.

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