Re: Abe versus Lincoln

From: Gianluca Interlandi (gianluca_at_u.washington.edu)
Date: Thu Apr 07 2011 - 13:50:45 CDT

Hi Johan,

Why do you say that you need more SU's on Abe, when you need 5 nodes on
Lincoln to get the same speed as on 4 nodes of Abe?

Thanks,

      Gianluca

On Thu, 7 Apr 2011, johan strumpfer wrote:

> Hi Gianluca,
>
> I've been running on both. Some benchmarks (system size ~120000 atoms):
> Using lincoln 32 CPU's (i.e. 4 nodes) I get ~0.034 s/step and using
> 160 CPU's on Abe I get ~0.017 s/step.
>
> Note that using CUDA NAMD, the scaling is good up to a point and then
> drops dramatically. E.g. running on 5 nodes on Lincoln also gets me
> approximate 0.034 s/step. So you'll be able to run faster on Abe, but
> it will use up many more SU's.
>
> Hope this helps,
> Johan
>
> On Thu, Apr 7, 2011 at 2:22 PM, Gianluca Interlandi
> <gianluca_at_u.washington.edu> wrote:
>> Hi!
>>
>> Are there any benchmarks available which compare the performance of NAMD on
>> Lincoln (CUDA heterogenous cluster) with its performance on a traditional
>> CPU only cluster like Abe?
>>
>> Thanks!
>>
>>     Gianluca
>>
>> -----------------------------------------------------
>> Gianluca Interlandi, PhD gianluca_at_u.washington.edu
>>                    +1 (206) 685 4435
>>                    http://artemide.bioeng.washington.edu/
>>
>> Postdoc at the Department of Bioengineering
>> at the University of Washington, Seattle WA U.S.A.
>> -----------------------------------------------------
>>
>>
>

-----------------------------------------------------
Gianluca Interlandi, PhD gianluca_at_u.washington.edu
                     +1 (206) 685 4435
                     http://artemide.bioeng.washington.edu/

Postdoc at the Department of Bioengineering
at the University of Washington, Seattle WA U.S.A.
-----------------------------------------------------

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