tree-node error

From: Agarwal, Shankar <sagarwal_at_ku.edu>
Date: Sat, 23 Oct 2010 12:23:47 -0500

Hi,

I tried running a N-body simulation with N_gas=N_cdm=64^3 particles in a 256Mpc/h box. I generated the gas+CDM ICs using ZA+2LPT.

The simulation quits with this error message:

Type 0 (gas): 262144 (tot= 0000262144) masstab=78.144
Type 1 (halo): 262144 (tot= 0000262144) masstab=479.52
Type 2 (disk): 0 (tot= 0000000000) masstab=0
Type 3 (bulge): 0 (tot= 0000000000) masstab=0
Type 4 (stars): 0 (tot= 0000000000) masstab=0
Type 5 (bndry): 0 (tot= 0000000000) masstab=0

reading done.
Total number of particles : 0000524288

allocated 0.0762939 Mbyte for ngb search.

Allocated 48.123 MByte for BH-tree. 64

domain decomposition...
NTopleaves= 64
work-load balance=1 memory-balance=1
domain decomposition done.
begin Peano-Hilbert order...
Peano-Hilbert done.
Begin Ngb-tree construction.
Ngb-Tree contruction finished
ngb iteration 1: need to repeat for 0000158063 particles.
ngb iteration 2: need to repeat for 0000000004 particles.
ngb iteration 3: need to repeat for 0000000004 particles.
ngb iteration 4: need to repeat for 0000000001 particles.

Setting next time for snapshot file to Time_next= 0.019608


Begin Step 0, Time: 0.0196078, Redshift: 50, Systemstep: 0, Dloga: 0
domain decomposition...
NTopleaves= 64
work-load balance=1 memory-balance=1
domain decomposition done.
begin Peano-Hilbert order...
Peano-Hilbert done.
Start force computation...
Starting periodic PM calculation.

Allocated 26.0742 MByte for FFT data.
done PM.
Tree construction.
task 0: maximum number 671088 of tree-nodes reached.
for particle 380982
task 0: endrun called with an error level of 1

application called MPI_Abort(MPI_COMM_WORLD, 1) - process 0



Please let me know how may I deal with this.

Regards
Shankar Agarwal
KU Cosmology Group
University of Kansas,
Lawrence,KS-66045,USA
Received on 2010-10-23 19:23:50