Thank you for your response Christoph! 

I also have a quick question about performance. 

These simulations consisting of about 11000 atoms (not a very large 
system), is taking much longer than my all-atom simulation. I am seeing the 
following message in when mdrun is run on GMX:

"Multiple energy groups is not implemented for GPUs, falling back to the 
CPU. For better performance, run on the GPU without energy groups and then 
do gmx mdrun -rerun option of the trajectory with an energy group .tpr 
file." 

Is the lack of GPU support leading to about 0.1 ns/hr speeds? Are tabulated 
potentials for non-bonded/bonded interactions slower in GMX? 

On Wednesday, October 6, 2021 at 12:14:25 PM UTC-4 Christoph Junghans wrote:

> On Wed, Oct 6, 2021 at 9:04 AM Satyen Dhamankar <[email protected]> wrote:
> >
> > Hello,
> >
> > I am running IBI on a particular polymer simulation, and I VOTCA has 
> some files in step_xxx directories. My question is, given a distribution I 
> have asked to recreate, A-B.dist.tgt, how do I check the extent to which it 
> has been reproduced in the simulation?
>
> dist.new is the file to check, it is the distribution done with the
> current potential. (.pot.cur)
>
> > For example, I am trying to optimize TW-TW.dist.tgt, and these are all 
> the TW-TW files that have been generated:
> >
> > TW-TW.conv
> > TW-TW.dist.conv
> > TW-TW.dist.new
> > TW-TW.dist.new.resample.fnF
> > TW-TW.dist.tgt
> > TW-TW.dist.tgt_extrapolated.hpVpl
> > TW-TW.dist.tgt_extrapolated_left.fLt6f
> > TW-TW.dist.tgt_extrapolated_left.RchsI
> > TW-TW.dist.tgt_extrapolated.ly2nG
> > TW-TW.dist.tgt_smooth.TEwdo
> > TW-TW.dist.tgt_smooth.TiJo0
> > TW-TW.dpot.1
> > TW-TW.dpot.new
> > TW-TW.dpot.pure_ibi
> > TW-TW.pot.1
> > TW-TW.pot.2
> > TW-TW.pot.3
> > TW-TW.pot.cur
> > TW-TW.pot.extrapol.8Lku6
> > TW-TW.pot.interpol.P4rlN
> > TW-TW.pot.new
> > TW-TW.pot.shift.QoRc9
> > TW-TW.pot.smooth.hnK0t
> > TW-TW.pot.smooth.hnK0t.onlyleft.zhxPa
> >
> > Furthermore, in the event that IBI has converged successfully, are the 
> tables, table_TW_TW.xvg what I am supposed to use for a long-scale 
> simulation?
> Correct!
>
> >
> > Jumping off of the question above, if I want to run an IBI where I want 
> to recreate other potentials and use the potentials developed by a previous 
> IBI. For example, running an IBI on bonded potentials after running an IBI 
> on non-bonded potentials, how do I do this on VOTCA?
>
> If you want to iterate on them more, you can put a <name>.pot.in in
> the main directory as an initial guess.
> If you don't want to iterate on them more, you just add the final xvg
> file to <filelist> and remove their block from settings.xml.
>
> Christoph
> >
> > --
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> .
>
>
>
> -- 
> Christoph Junghans
> Web: http://www.compphys.de
>

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