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Daniel Shawul
Joined: 14 Mar 2006
Posts: 2280
Location: Ethiopia
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 Post subject: Re: Choosing a GPU platform: AMD and Nvidia Posted: Mon Jun 11, 2012 12:28 am |
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| johnhamlen wrote: |
| Daniel Shawul wrote: |
No. Shared memory (or. local memory as AMD calls it) is allocated per multi-processor not for each cuda core. Each mp consists of a group of 8 cuda cores, and the latest one using fermi architecture have 32 cuda cores per mp. Infact the 48kb figure is for the fermi, so you get very little per core. |
Cheers Daniel. I was being a little optimistic! It's interesting to note from http://www.anandtech.com/show/5699/nvidia-geforce-gtx-680-review/2 that going from Fermi to Kepler Nvidia has halved the amount of memory available to each CUDA core. The greater number of cores on the die obviously helps the graphics performance, but sacrificing the memory sure isn't going to help general purpose computing  |
Well I am not that familiar with the kepler as that is brand new. It seems there are far more number of cores per SM now after some innovations. For the fermi it was 32 now it is 192. Anyway you have to remeber that an SM runs a lot more threads than the number of cores. So for example the fermi can run upto 1024 threads in an SM (at 100% occupancy). If you divide 48kb/1024 you get very very small. When doing my MC simulaiton, I didn't even have space to store moves generated temporarily for move sorting and other stuff. So you can understand why I am strongly opposed to a piece list board representation ,that atleast in my case would have consumed more than 2kb/thread. Simply unacceptable.
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| Subject |
Author |
Date/Time |
 Choosing a GPU platform: AMD and Nvidia |
John Hamlen |
Sun Jun 10, 2012 2:52 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
John Hamlen |
Sun Jun 10, 2012 6:12 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
Daniel Shawul |
Sun Jun 10, 2012 6:56 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
John Hamlen |
Sun Jun 10, 2012 11:25 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
Daniel Shawul |
Mon Jun 11, 2012 12:28 am |
| Re: Choosing a GPU platform: AMD and Nvidia |
John Hamlen |
Mon Jun 11, 2012 1:06 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
Daniel Shawul |
Mon Jun 11, 2012 2:53 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
John Hamlen |
Mon Jun 11, 2012 11:14 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
Srdja Matovic |
Sat Jul 14, 2012 2:06 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
Vincent Diepeveen |
Sat Jul 14, 2012 3:53 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
Srdja Matovic |
Sun Jul 15, 2012 11:10 am |
| Re: Choosing a GPU platform: AMD and Nvidia |
Srdja Matovic |
Sun Jul 15, 2012 11:35 am |
| Re: Choosing a GPU platform: AMD and Nvidia |
Vincent Diepeveen |
Sun Jul 15, 2012 12:19 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
Srdja Matovic |
Sun Jul 15, 2012 12:37 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
Vincent Diepeveen |
Sun Jul 15, 2012 5:45 pm |
| Re: i choose AMD |
Srdja Matovic |
Mon Jun 11, 2012 2:56 pm |
| Re: Choosing a GPU platform: AMD and Nvidia |
Vincent Diepeveen |
Sat Jul 14, 2012 3:30 pm |
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