[mpich-discuss] Hydra binding questions

[Jain, Rohit]

Hi Pavan,

We don't have standalone example. It is tied to our application. Our application does very frequent communications. 
However if you have any benchmark example, I can try it with our setup (machine, builds), and see if it is behaving in similar way.

Also, you mentioned the speed up with mpd Vs hydra in other mail. Do you have any benchmark data on MPICH2-1.4, compare to older versions?

-Rohit

-----Original Message-----
From: Pavan Balaji [mailto:balaji at mcs.anl.gov] 
Sent: Thursday, August 04, 2011 9:30 PM
To: Jain, Rohit
Cc: mpich-discuss at mcs.anl.gov
Subject: Re: [mpich-discuss] Hydra binding questions


On 08/04/2011 10:56 PM, Jain, Rohit wrote:
> Rohit: I agree it may not have to do with mpd vs hydra. I am
> comparing same application with 2 different versions of MPICH. With
> using same binding methods, I wouldn't expect slowdown. There is 20%
> increase in runtime of our application with MPICH2-1.4, which is kind
> of surprising, as i was expecting similar or better runtime with
> newer MPICH.

It's hard to tell what's wrong here without knowing more about the 
application. Do you have a benchmark where the problem is demonstrable?

-- 
Pavan Balaji
http://www.mcs.anl.gov/~balaji