Shared GPU memory

[SANGHOON CHONG]

Dear Dr. Fang,

I recently started using this wonderful tool for my research. Thanks so much for the great piece of work.

I got the hang of it after a few trials, and I noticed that sharedmem reported by 'gpuinfo', and "Shared GPU memory" in the task manager displays a different number in my case. The former reads 49152B while the latter reads 16.0GB memory. And I got error -2 by filling up dedicated gpu memory of 6GB. I wonder why the rest of the shared GPU memory is not utilized in this case and how I can fully enable the rest of the shared GPU memory. Would you be able to help me on this?

FYI, below is the information I have for my GPU.

           name: 'GeForce GTX 1060 6GB'
                  id: 1
     devcount: 1
           major: 6
           minor: 1
 globalmem: 6.4425e+09
  constmem: 65536

sharedmem: 49152
      regcount: 65536
            clock: 1784500
                sm: 10
              core: 1280
    autoblock: 64

   autothread: 20480
       maxgate: 0

Thanks,

Bryan

[Fang, Qianqian]

On 11/3/20 11:31 PM, SANGHOON CHONG wrote:

Dear Dr. Fang,

I recently started using this wonderful tool for my research. Thanks so much for the great piece of work.

I got the hang of it after a few trials, and I noticed that sharedmem reported by 'gpuinfo', and "Shared GPU memory" in the task manager displays a different number in my case. The former reads 49152B while the latter reads 16.0GB memory. And I got error -2 by filling up dedicated gpu memory of 6GB. I wonder why the rest of the shared GPU memory is not utilized in this case and how I can fully enable the rest of the shared GPU memory. Would you be able to help me on this?

hi Sanghoon,

shared memory is a special high-speed internal memory on the GPU, and the number printed by mcxlab is correct, it should be 48KB for GTX1060, see

https://en.wikipedia.org/wiki/Pascal_(microarchitecture)#Chips

what you have mentioned, 6GB, is not the shared memory, but the global memory. Please see the "globalmem" output of mcxlab.

Qianqian

FYI, below is the information I have for my GPU.

           name: 'GeForce GTX 1060 6GB'
                  id: 1
     devcount: 1
           major: 6
           minor: 1
 globalmem: 6.4425e+09
  constmem: 65536

sharedmem: 49152
      regcount: 65536
            clock: 1784500
                sm: 10
              core: 1280
    autoblock: 64

   autothread: 20480
       maxgate: 0

Thanks,

Bryan

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