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

[xu yuehua]

Dear Ding:
I think  about your idea , if your idea is correct ,that says:if i use 6 cpu
to do scf ,then i must use the same number of cpu to continue tophonon
calculation .is it right for  me to comprehend your idea ?
need your help thanks a lot


2007/6/8, Xunlei Ding <ding at sissa.it>:
>
> 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
>
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-- 
Xu Yuehua
physics Department of Nanjing university
China
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