[ESPResSo] ghost_communicator

[pojeda]

Hi,

I am dealing with a system of N molecules of the  type:


 p ------- v -------- p


where p are real particles and v a virtual site.
The code runs fine with one processor but it takes lot of time. I have
run the same script but with 2 processors and I got the error
cited below. I have taken a look into the code and it seems
that in the subroutine  "void integrate_vv(int n_steps)"
ESPRESSO stops when the function
ghost_communicator(&cell_structure.update_ghost_pos_comm);
is called.

Maybe you can help me with the following questions:

1) What is the task of "ghost_communicator" subroutine and how to
check if it is doing the task correctly?

2) What is the name of the array which contains the positions
and the velocities of all the particles in the system?


Thanks in advance.

-----------------------------------------------------------------------
[tamarau:27505] *** Process received signal ***
[tamarau:27505] Signal: Segmentation fault (11)
[tamarau:27505] Signal code: Address not mapped (1)
[tamarau:27505] Failing at address: 0x5110
[tamarau:27505] [ 0] /lib64/libpthread.so.0 [0x2b683783ba90]
[tamarau:27505] [ 1]
/auto.anoa/home/pojeda/Espresso_cvs/obj-Athlon_64-pc-linux/Espresso_bin
[0x567065]
[tamarau:27505] [ 2]
/auto.anoa/home/pojeda/Espresso_cvs/obj-Athlon_64-pc-linux/Espresso_bin
[0x422752]
--------------------------------------------------------------------------
mpirun noticed that process rank 1 with PID 27505 on node tamarau exited
on signal 11 (Segmentation fault).
--------------------------------------------------------------------------
[tamarau:27505] [ 3]
/auto.anoa/home/pojeda/Espresso_cvs/obj-Athlon_64-pc-linux/Espresso_bin
[0x40a2bb]
[tamarau:27505] [ 4]
/auto.anoa/home/pojeda/Espresso_cvs/obj-Athlon_64-pc-linux/Espresso_bin
[0x407e6e]
[tamarau:27505] [ 5]
/auto.anoa/home/pojeda/Espresso_cvs/obj-Athlon_64-pc-linux/Espresso_bin
[0x405033]
[tamarau:27505] [ 6] /lib64/libc.so.6(__libc_start_main+0xe6)
[0x2b6837a67586]
[tamarau:27505] [ 7]
/auto.anoa/home/pojeda/Espresso_cvs/obj-Athlon_64-pc-linux/Espresso_bin
[0x404f19]
[tamarau:27505] *** End of error message ***
----------------------------------------------------------------------