[bgl-discuss] NAN for mpi_wtime() ?

[Paul Fischer <fischer@xxxxxxxxxxx>]

Does anyone have a clue why I should get NAN as a return
result for mpi_wtime ?

I have the following code fragment:

      t0 = mpi_wtime()
      gs_handle = fgs_init(glo_num,ntot,np)
      t1 = mpi_wtime()
      et = t1-t0
      if (nid.eq.0) then
         write(6,1) et,t0,t1,nx,ntot,ngv,np,gs_handle
    1    format('fgs_init A:',1p3e11.4,' seconds ',i4,4i10)
      endif

which produces:

 fgs_init A:   -NAN 1.1306E+09   -NAN seconds    2       960   16320 128 2
 fgs_init A:   -NAN 1.1306E+09   -NAN seconds    4      7680  423360 128 3
 fgs_init A:   -NAN 1.1306E+09   -NAN seconds    6     25920 1944000 128 4
 fgs_init A:   -NAN 1.1306E+09   -NAN seconds    8     61440 5315520 128 5

There is no problem w/ the first mpi_wtime() call, only w/ the second??

Thanks -- Paul


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