AW: AW: AW: NAMD crashes with OpenMPI/OpenMX

From: Norman Geist (norman.geist_at_uni-greifswald.de)
Date: Wed Jun 15 2011 - 10:37:47 CDT

Oh, much better ping than mine. Oh, and Apoa is a mini system and isn't very
good for scaling testing. Try the stmv ;)

Let me know.

Norman Geist.

-----Ursprüngliche Nachricht-----
Von: owner-namd-l_at_ks.uiuc.edu [mailto:owner-namd-l_at_ks.uiuc.edu] Im Auftrag
von Thomas Albers
Gesendet: Mittwoch, 15. Juni 2011 17:01
An: namd-l_at_ks.uiuc.edu
Betreff: Re: AW: AW: namd-l: NAMD crashes with OpenMPI/OpenMX

On 6/15/2011 10:37 AM, Norman Geist wrote:
> Well I have a TCP version, and yes tcp congestion control highspeed made a
> big deference in scaling behavior on my cluster. Maybe try out. What is
the
> ping time of your cluster?

While running the ApoA1 benchmark on 18 cores, 4 computers:
--- ferrari ping statistics ---
51 packets transmitted, 51 received, 0% packet loss, time 50011ms
rtt min/avg/max/mdev = 0.035/0.489/4.324/0.918 ms

no load:
--- ferrari ping statistics ---
11 packets transmitted, 11 received, 0% packet loss, time 9999ms
rtt min/avg/max/mdev = 0.052/0.052/0.054/0.007 ms

Thomas

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