[gmx-users] GPU warnings

[Albert]

well, IC.
the performance is rather poor than GTX590..... 32ns/day vs 4 ns/day
probably that's also something related to the warnings?

THX


On 11/04/2012 01:59 PM, Justin Lemkul wrote:
>
>
> On 11/4/12 4:55 AM, Albert wrote:
>> hello:
>>
>>   I am running Gromacs 4.6 GPU on a workstation with two GTX 660 Ti 
>> (2 x 1344
>> CUDA cores), and I got the following warnings:
>>
>> thank you very much.
>>
>> ---------------------------messages-----------------------------------
>>
>> WARNING: On node 0: oversubscribing the available 0 logical CPU cores 
>> per node
>> with 2 MPI processes.
>>           This will cause considerable performance loss!
>>
>> 2 GPUs detected on host boreas:
>>    #0: NVIDIA GeForce GTX 660 Ti, compute cap.: 3.0, ECC:  no, stat: 
>> compatible
>>    #1: NVIDIA GeForce GTX 660 Ti, compute cap.: 3.0, ECC:  no, stat: 
>> compatible
>>
>> 2 GPUs auto-selected to be used for this run: #0, #1
>>
>> Using CUDA 8x8x8 non-bonded kernels
>> Making 1D domain decomposition 1 x 2 x 1
>>
>> * WARNING * WARNING * WARNING * WARNING * WARNING * WARNING *
>> We have just committed the new CPU detection code in this branch,
>> and will commit new SSE/AVX kernels in a few days. However, this
>> means that currently only the NxN kernels are accelerated!
>> In the mean time, you might want to avoid production runs in 4.6.
>>
>
> I can't address the first warning, but the second is fairly obvious.  
> You're not using an official release, you're using the development 
> version - let the user beware.  The code is not yet production-ready.
>
> -Justin
>