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

[Xunlei Ding]

Dear Xu,
I think,
error for 6 cpu calculation is just because one of the six nodes is down,
and error for 4 cpu calculation is because you change 6 cpu to 4 cpu.
So my suggestion is, doing the ph calculation with 6 cpu again.

Hope it will works.

Yours,
ding



xu yuehua wrote:

> 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