[Pw_forum] PHONON errors varies when i use 6 or 2 cpu?

[xu yuehua]

hi everyone?
today i met a problem when i compute phonon :first i do scf using 6 cpu
,then i also use 6 cpu to do phono at G,BUT a problem came out in out.file :



 Proc/  planes cols    G   planes cols    G    columns  G
 Pool       (dense grid)      (smooth grid)   (wavefct grid)
  1      5   3284  53988    4   2408  34052  719   5577
  2      4   3283  53987    4   2407  34051  719   5577
  3      4   3283  53987    4   2407  34049  719   5577
  4      4   3283  53987    4   2407  34051  719   5577
  5      4   3283  53987    4   2407  34049  719   5577
  6      4   3283  53987    4   2407  34051  720   5576
  0     25  19699 323923   24  14443 204303 4315  33461


     nbndx  =    20  nbnd   =    20  natomwfc =    30  npwx   =    4282
     nelec  =  40.00  nkb   =    50  ngl    =   10269
p0_9381:  p4_error: net_recv read:  probable EOF on socket: 1
Killed by signal 2.^M
forrtl: error (69): process interrupted (SIGINT)
Killed by signal 2.^M
Killed by signal 2.^M
Killed by signal 2.^M
Killed by signal 2.^M
p0_9381: (12.363281) net_send: could not write to fd=4, errno = 32
Fri Jun  8 09:41:35 CST 2007

because i do not know the reason .and then i try to use 4 cpu to compute
phono  ,this time the error is like this :



Representation    44      1 modes - To be done

     Representation    45      1 modes - To be done
 IOS = 36

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     from davcio : error #        20
     i/o error in davcio
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

     stopping ...

 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     from davcio : error #        20
     i/o error in davcio
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     stopping ...
[0] MPI Abort by user Aborting program !
[0] Aborting program!
p0_11006:  p4_error: : 0
Killed by signal 2.^M
forrtl: error (69): process interrupted (SIGINT)
p0_11006: (18.296875) net_send: could not write to fd=4, errno = 32
Fri Jun  8 09:57:22 CST 2007

above two case ,the same input:
phonons of fiveringwater at Gamma
 &inputph
  tr2_ph=1.0d-14,
  prefix='fxx_specify_ibra_500_12+force',
  epsil=.true.,
  amass(1)=1.0,
  amass(2)=15.999,
  outdir='/raid/xx/pwscf/tmp/',
  fildyn='fxx.dynG',
 /
0.0 0.0 0.0





so my question is  why different number of cpu can change the error ?
befor a few days ago ,i use 2 cpu to do relax ,scf and phonon about another
case ,there was well ,but now .....?
i need your  help .thanks

-- 
Xu Yuehua
physics Department of Nanjing university
China
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