AW: AW: Only one process running on cluster

From: Norman Geist (norman.geist_at_uni-greifswald.de)
Date: Wed Jun 13 2012 - 05:13:45 CDT

Great.

On linux you can also press 1 within the top command. This will show a list of the utilization for all individual cores.

Norman Geist.

> -----Ursprüngliche Nachricht-----
> Von: owner-namd-l_at_ks.uiuc.edu [mailto:owner-namd-l_at_ks.uiuc.edu] Im
> Auftrag von amin_at_imtech.res.in
> Gesendet: Mittwoch, 13. Juni 2012 11:03
> An: Norman Geist
> Cc: namd-l_at_ks.uiuc.edu
> Betreff: Re: AW: namd-l: Only one process running on cluster
>
> Thanks a lot. I certainly don't mind if the program is actually using 8
> processors and just showing one process. I was worried that probably
> its running
> 8 processes on a single processor and that's why its showing one
> process with
> 800% usage, because generally when I run a parallel program I see 8
> processes
> with 100% usage. Thanks for the explanation.
>
> Amin.
>
> > Hi amin,
> >
> > well actually there's no problem. The multicore version uses a shared
> memory
> > parallelism that don't start multiple processes. Instead it's using
> all cores
> > you told with the +p8 with threads what shows up as 800% for the only
> one
> > process.
> >
> > If your problem is, that you want to run all 32 Cores on one node,
> you need to
> > specify +p32. And if you want to run multiple nodes, you need a namd
> build with
> > network support.
> >
> > If that doesn't help, please explain more detailed.
> >
> > Norman Geist.
> >
> >
> >> -----Ursprüngliche Nachricht-----
> >> Von: owner-namd-l_at_ks.uiuc.edu [mailto:owner-namd-l_at_ks.uiuc.edu] Im
> >> Auftrag von amin_at_imtech.res.in
> >> Gesendet: Mittwoch, 13. Juni 2012 09:25
> >> An: namd-l_at_ks.uiuc.edu
> >> Betreff: namd-l: Only one process running on cluster
> >>
> >> Dear all,
> >> I am trying to run NAMD 2.9 multicore on a linux cluster
> having
> >> 32
> >> processors per node. After logging on to the node, I am using the
> >> following command to run NAMD:
> >> charmrun +p8 /path to namd2/namd2 <config file>
> >>
> >> I have tried with and without ++local.
> >>
> >> The simulation runs and output is generated but top command shows
> only
> >> one
> >> process running at 800% not 8 processes?
> >>
> >> Can someone please tell me what's wrong here?
> >>
> >> Thanks.
> >>
> >>
> >>
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>
> ______________________________________________________________________
> सूक्ष्मजीव प्रौद्योगिकी संस्थान (वैज्ञानिक औद्योगिक
> अनुसंधान परिषद)
> Institute of Microbial Technology (A CONSTITUENT ESTABLISHMENT OF CSIR)
> सैक्टर 39 ए, चण्डीगढ़ / Sector 39-A, Chandigarh
> पिन कोड/PIN CODE :160036
> दूरभाष/EPABX :0172 6665 201-202

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