[gmx-users] mdrun segmentation fault

Sikandar Mashayak symashayak at gmail.com
Thu May 20 23:37:39 CEST 2010


It happens immediately at step 0., and the log file looks like :



Input Parameters:
   integrator           = md
   nsteps               = 20000
   init_step            = 0
   ns_type              = Grid
   nstlist              = 10
   ndelta               = 2
   nstcomm              = 0
   comm_mode            = Linear
   nstlog               = 1000
   nstxout              = 600
   nstvout              = 600
   nstfout              = 600
   nstenergy            = 1000
   nstxtcout            = 1000
   init_t               = 0
   delta_t              = 0.001
   xtcprec              = 10000
   nkx                  = 44
   nky                  = 42
   nkz                  = 120
   pme_order            = 4
   ewald_rtol           = 1e-05
   ewald_geometry       = 1
   epsilon_surface      = -1
   optimize_fft         = FALSE
   ePBC                 = xyz
   bPeriodicMols        = FALSE
   bContinuation        = FALSE
   bShakeSOR            = FALSE
   etc                  = Nose-Hoover
   epc                  = No
   epctype              = Isotropic
   tau_p                = 1
   ref_p (3x3):
      ref_p[    0]={ 0.00000e+00,  0.00000e+00,  0.00000e+00}
      ref_p[    1]={ 0.00000e+00,  0.00000e+00,  0.00000e+00}
      ref_p[    2]={ 0.00000e+00,  0.00000e+00,  0.00000e+00}
   compress (3x3):
      compress[    0]={ 0.00000e+00,  0.00000e+00,  0.00000e+00}
      compress[    1]={ 0.00000e+00,  0.00000e+00,  0.00000e+00}
      compress[    2]={ 0.00000e+00,  0.00000e+00,  0.00000e+00}
   refcoord_scaling     = No
   posres_com (3):
      posres_com[0]= 0.00000e+00
      posres_com[1]= 0.00000e+00
      posres_com[2]= 0.00000e+00
   posres_comB (3):
      posres_comB[0]= 0.00000e+00
      posres_comB[1]= 0.00000e+00
      posres_comB[2]= 0.00000e+00
   andersen_seed        = 815131
   rlist                = 1.1
   rtpi                 = 0.05
   coulombtype          = PME
   rcoulomb_switch      = 0
   rcoulomb             = 1.1
   vdwtype              = Cut-off
   rvdw_switch          = 0
   rvdw                 = 1.1
   epsilon_r            = 1
   epsilon_rf           = 1
   tabext               = 1
   implicit_solvent     = No
   gb_algorithm         = Still
   gb_epsilon_solvent   = 80
   nstgbradii           = 1
   rgbradii             = 2
   gb_saltconc          = 0
   gb_obc_alpha         = 1
   gb_obc_beta          = 0.8
   gb_obc_gamma         = 4.85
   sa_surface_tension   = 2.092
   DispCorr             = EnerPres
   free_energy          = no
   init_lambda          = 0
   sc_alpha             = 0
   sc_power             = 0
   sc_sigma             = 0.3
   delta_lambda         = 0
   nwall                = 0
   wall_type            = 9-3
   wall_atomtype[0]     = -1
   wall_atomtype[1]     = -1
   wall_density[0]      = 0
   wall_density[1]      = 0
   wall_ewald_zfac      = 3
   pull                 = no
   disre                = No
   disre_weighting      = Conservative
   disre_mixed          = FALSE
   dr_fc                = 1000
   dr_tau               = 0
   nstdisreout          = 100
   orires_fc            = 0
   orires_tau           = 0
   nstorireout          = 100
   dihre-fc             = 1000
   em_stepsize          = 0.01
   em_tol               = 100
   niter                = 20
   fc_stepsize          = 0
   nstcgsteep           = 1000
   nbfgscorr            = 10
   ConstAlg             = Lincs
   shake_tol            = 0.0001
   lincs_order          = 4
   lincs_warnangle      = 30
   lincs_iter           = 1
   bd_fric              = 0
   ld_seed              = 1993
   cos_accel            = 0
   deform (3x3):
      deform[    0]={ 0.00000e+00,  0.00000e+00,  0.00000e+00}
      deform[    1]={ 0.00000e+00,  0.00000e+00,  0.00000e+00}
      deform[    2]={ 0.00000e+00,  0.00000e+00,  0.00000e+00}
   userint1             = 0
   userint2             = 0
   userint3             = 0
   userint4             = 0
   userreal1            = 0
   userreal2            = 0
   userreal3            = 0
   userreal4            = 0
grpopts:
   nrdf:           0       12822
   ref_t:           0         300
   tau_t:           0         0.2
anneal:          No          No
ann_npoints:           0           0
   acc:               0           0           0
   nfreeze:           Y           Y           Y           N
N           N
   energygrp_flags[  0]: 1 0
   energygrp_flags[  1]: 0 0
   efield-x:
      n = 0
   efield-xt:
      n = 0
   efield-y:
      n = 0
   efield-yt:
      n = 0
   efield-z:
      n = 0
   efield-zt:
      n = 0
   bQMMM                = FALSE
   QMconstraints        = 0
   QMMMscheme           = 0
   scalefactor          = 1
qm_opts:
   ngQM                 = 0
Table routines are used for coulomb: TRUE
Table routines are used for vdw:     FALSE
Will do PME sum in reciprocal space.

++++ PLEASE READ AND CITE THE FOLLOWING REFERENCE ++++
U. Essman, L. Perela, M. L. Berkowitz, T. Darden, H. Lee and L. G. Pedersen
A smooth particle mesh Ewald method
J. Chem. Phys. 103 (1995) pp. 8577-8592
-------- -------- --- Thank You --- -------- --------

Using the Ewald3DC correction for systems with a slab geometry.

++++ PLEASE READ AND CITE THE FOLLOWING REFERENCE ++++
Y. In-Chul and M. L. Berkowitz
Ewald summation for systems with slab geometry
J. Chem. Phys. 111 (1999) pp. 3155-3162
-------- -------- --- Thank You --- -------- --------

Using a Gaussian width (1/beta) of 0.352179 nm for Ewald
Cut-off's:   NS: 1.1   Coulomb: 1.1   LJ: 1.1
System total charge: 0.000
Generated table with 4200 data points for Ewald.
Tabscale = 2000 points/nm
Generated table with 4200 data points for LJ6.
Tabscale = 2000 points/nm
Generated table with 4200 data points for LJ12.
Tabscale = 2000 points/nm

Enabling SPC water optimization for 2137 molecules.

Configuring nonbonded kernels...
Testing ia32 SSE2 support... present.


Removing pbc first time

++++ PLEASE READ AND CITE THE FOLLOWING REFERENCE ++++
S. Miyamoto and P. A. Kollman
SETTLE: An Analytical Version of the SHAKE and RATTLE Algorithms for Rigid
Water Models
J. Comp. Chem. 13 (1992) pp. 952-962
-------- -------- --- Thank You --- -------- --------

There are: 7699 Atoms
Max number of connections per atom is 2
Total number of connections is 8548
Max number of graph edges per atom is 2
Total number of graph edges is 8548

Constraining the starting coordinates (step 0)

Constraining the coordinates at t0-dt (step 0)
RMS relative constraint deviation after constraining: 0.00e+00
Initial temperature: 304.27 K

Started mdrun on node 0 Thu May 20 16:33:38 2010

           Step           Time         Lambda
              0        0.00000        0.00000

Grid: 5 x 5 x 14 cells
Long Range LJ corr.: <C6> 1.1930e-03
Long Range LJ corr.: Epot   -415.301, Pres:   -51.4754, Vir:    415.301
   Energies (kJ/mol)
        LJ (SR)  Disper. corr.   Coulomb (SR)   Coul. recip.      Potential
    6.44979e+04   -4.15301e+02   -1.00185e+05   -4.94669e+03   -4.10490e+04
    Kinetic En.   Total Energy  Conserved En.    Temperature Pressure (bar)
    1.72141e+04   -2.38349e+04   -2.38347e+04    3.22940e+02    1.36187e+04


On Thu, May 20, 2010 at 4:30 PM, Justin A. Lemkul <jalemkul at vt.edu> wrote:

>
>
> Sikandar Mashayak wrote:
>
>> Hi
>>
>> I have gromacs input files for md simulation, with these set up files
>> (*.mdp,*.top,*.itp *.gro), I can successfully run grompp and mdrun on one
>> machine, but when I move it to other machine, I get segmentation fault when
>> I do mdrun. Both the machines have exactly same types of installation of
>> gromacs 4.0.7 . Also, I can run water tutorials successfully on both the
>> machines.
>>
>> So what could be the source of segmentation fault?
>>
>>
> MD is chaotic, so you may not get the same result every time you run a
> simulation.  Since you've not said how quickly the seg fault occurs it is
> exceptionally hard to diagnose.  Generally, seg faults with mdrun occur
> because the system crashes from an instability.  Without substantially more
> information (system contents, .mdp settings, relevant log file output, etc)
> there is not much more to suggest.
>
> -Justin
>
>  thanks
>> sikandar
>>
>>
> --
> ========================================
>
> Justin A. Lemkul
> Ph.D. Candidate
> ICTAS Doctoral Scholar
> MILES-IGERT Trainee
> Department of Biochemistry
> Virginia Tech
> Blacksburg, VA
> jalemkul[at]vt.edu | (540) 231-9080
> http://www.bevanlab.biochem.vt.edu/Pages/Personal/justin
>
> ========================================
> --
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