<html>
  <head>
    <meta content="text/html; charset=windows-1252"
      http-equiv="Content-Type">
  </head>
  <body text="#000000" bgcolor="#FFFFFF">
    Hi Chong Wang,<br>
    <br>
    Perhaps it would be better to run ./configure with,<br>
    ./configure CC=icc CXX=icpc F90=ifort F77=ifort MPIF90=mpiifort
    --with-scalapack=intel<br>
    <br>
    so that QE knows which compiler to use, verified with QE v5.3.0.<br>
    <br>
    Rolly<br>
    <br>
    <div class="moz-cite-prefix">On 05/16/2016 05:52 PM, Paolo Giannozzi
      wrote:<br>
    </div>
    <blockquote
cite="mid:CAPMgbCvF88tA4XbPGvXoWxYOU02WAq_BCP+MT3DeODot52Di6Q@mail.gmail.com"
      type="cite">
      <div dir="ltr">On Mon, May 16, 2016 at 4:11 AM, Chong Wang <span
          dir="ltr"><<a moz-do-not-send="true"
            href="mailto:ch-wang@outlook.com" target="_blank">ch-wang@outlook.com</a>></span>
        wrote:<br>
        <br>
        <div class="gmail_extra">
          <div class="gmail_quote">
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div dir="ltr">
                <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">I
                  have checked my mpif90 calls gfortran so there's no
                  mix up. </div>
              </div>
            </blockquote>
            <div><br>
            </div>
            <div>I am not sure it is possible to use gfortran together
              with intel mpi. If you have intel mpi and mkl, presumably
              you have the intel compiler as well.<br>
               <br>
            </div>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div dir="ltr">
                <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">Can
                  you kindly share with me your make.sys?</div>
              </div>
            </blockquote>
            <div><br>
            </div>
            <div>it doesn't make sense to share a make.sys file unless
              the software configuration is the same.<br>
              <br>
            </div>
            <div>Paolo<br>
            </div>
            <div><br>
            </div>
            <br>
            <blockquote class="gmail_quote" style="margin:0 0 0
              .8ex;border-left:1px #ccc solid;padding-left:1ex">
              <div dir="ltr">
                <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
                  Thanks in advance!
                  <p><br>
                  </p>
                  <p>Best!</p>
                  <p><br>
                  </p>
                  <p>Chong Wang</p>
                  <hr style="display:inline-block;width:98%">
                  <div dir="ltr"><font style="font-size:11pt"
                      face="Calibri, sans-serif" color="#000000"><b>From:</b>
                      <a moz-do-not-send="true"
                        href="mailto:pw_forum-bounces@pwscf.org"
                        target="_blank">pw_forum-bounces@pwscf.org</a>
                      <<a moz-do-not-send="true"
                        href="mailto:pw_forum-bounces@pwscf.org"
                        target="_blank">pw_forum-bounces@pwscf.org</a>>
                      on behalf of Paolo Giannozzi <<a
                        moz-do-not-send="true"
                        href="mailto:p.giannozzi@gmail.com"
                        target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:p.giannozzi@gmail.com">p.giannozzi@gmail.com</a></a>><br>
                      <b>Sent:</b> Monday, May 16, 2016 3:10 AM<br>
                      <b>To:</b> PWSCF Forum<br>
                      <b>Subject:</b> Re: [Pw_forum] mpi error using
                      pw.x</font>
                    <div> </div>
                  </div>
                  <div>
                    <div dir="ltr">Your make.sys shows clear signs of
                      mixup between ifort and gfortran. Please verify
                      that mpif90 calls ifort and not gfortran (or vice
                      versa). Configure issues a warning if this
                      happens.
                      <br>
                      <br>
                      I have successfully run your test on a machine
                      with some recent intel compiler and intel mpi. The
                      second output (run as mpirun -np 18 pw.x -nk
                      18....) is an example of what I mean by "type of
                      parallelization": there are many different
                      parallelization levels in QE. This is on k-points
                      (and runs faster in this case on less processors
                      than parallelization on plane waves).<br>
                      <div class="gmail_extra"><br>
                      </div>
                      <div class="gmail_extra">Paolo<br>
                        <br>
                      </div>
                      <div class="gmail_extra">
                        <div class="gmail_quote">On Sun, May 15, 2016 at
                          6:01 PM, Chong Wang <span dir="ltr">
                            <<a moz-do-not-send="true"
                              href="mailto:ch-wang@outlook.com"
                              title="mailto:ch-wang@outlook.com
                              Ctrl+Click or tap to follow the link"
                              target="_blank">ch-wang@outlook.com</a>></span>
                          wrote:<br>
                          <blockquote class="gmail_quote"
                            style="margin:0 0 0 .8ex;border-left:1px
                            #ccc solid;padding-left:1ex">
                            <div>
                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
                                <p>Hi,</p>
                                <p><br>
                                </p>
                                <p>I have done more test:</p>
                                <p>1. intel mpi 2015 yields segment
                                  fault</p>
                                <p>2. intel mpi 2013 yields the same
                                  error here</p>
                                <p>Did I do something wrong with
                                  compiling? Here's my make.sys:</p>
                                <p><br>
                                </p>
                                <p><span># make.sys.  Generated from <a
                                      moz-do-not-send="true"
                                      href="http://make.sys.in"
                                      target="_blank">
                                      make.sys.in</a> by configure.</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># compilation rules</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>.SUFFIXES :</span></p>
                                <p><span>.SUFFIXES : .o .c .f .f90</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># most fortran compilers can
                                    directly preprocess c-like
                                    directives: use</span></p>
                                <p><span># <span></span>$(MPIF90)
                                    $(F90FLAGS) -c $<</span></p>
                                <p><span># if explicit preprocessing by
                                    the C preprocessor is needed, use:</span></p>
                                <p><span># <span></span>$(CPP)
                                    $(CPPFLAGS) $< -o $*.F90</span></p>
                                <p><span>#<span> </span>$(MPIF90)
                                    $(F90FLAGS) -c $*.F90 -o $*.o</span></p>
                                <p><span># remember the tabulator in the
                                    first column !!!</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>.f90.o:</span></p>
                                <p><span><span></span>$(MPIF90)
                                    $(F90FLAGS) -c $<</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># .f.o and .c.o: do not modify</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>.f.o:</span></p>
                                <p><span><span></span>$(F77) $(FFLAGS)
                                    -c $<</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>.c.o:</span></p>
                                <p><span><span></span>$(CC) $(CFLAGS) 
                                    -c $<</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span></span><br>
                                </p>
                                <p><span></span><br>
                                </p>
                                <p><span># Top QE directory, not used in
                                    QE but useful for linking QE libs
                                    with plugins</span></p>
                                <p><span># The following syntax should
                                    always point to TOPDIR:</span></p>
                                <p><span>#   $(dir $(abspath $(filter
                                    %make.sys,$(MAKEFILE_LIST))))</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>TOPDIR =
                                    /home/wangc/temp/espresso-5.4.0</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># DFLAGS  = precompilation
                                    options (possible arguments to -D
                                    and -U)</span></p>
                                <p><span>#           used by the C
                                    compiler and preprocessor</span></p>
                                <p><span># FDFLAGS = as DFLAGS, for the
                                    f90 compiler</span></p>
                                <p><span># See include/defs.h.README for
                                    a list of options and their meaning</span></p>
                                <p><span># With the exception of IBM
                                    xlf, FDFLAGS = $(DFLAGS)</span></p>
                                <p><span># For IBM xlf, FDFLAGS is the
                                    same as DFLAGS with separating
                                    commas</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># MANUAL_DFLAGS  = additional
                                    precompilation option(s), if desired</span></p>
                                <p><span>#                  BEWARE: it
                                    does not work for IBM xlf! Manually
                                    edit FDFLAGS</span></p>
                                <p><span>MANUAL_DFLAGS  =</span></p>
                                <p><span>DFLAGS         =  -D__GFORTRAN
                                    -D__STD_F95 -D__DFTI -D__MPI
                                    -D__PARA -D__SCALAPACK</span></p>
                                <p><span>FDFLAGS        = $(DFLAGS)
                                    $(MANUAL_DFLAGS)</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># IFLAGS = how to locate
                                    directories with *.h or *.f90 file
                                    to be included</span></p>
                                <p><span>#          typically
                                    -I../include
                                    -I/some/other/directory/</span></p>
                                <p><span>#          the latter contains
                                    .e.g. files needed by FFT libraries</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>IFLAGS         = -I../include
                                    -I/opt/intel/compilers_and_libraries_2016.3.210/linux/mkl/include</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># MOD_FLAGS = flag used by f90
                                    compiler to locate modules</span></p>
                                <p><span># Each Makefile defines the
                                    list of needed modules in MODFLAGS</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>MOD_FLAG      = -I</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># Compilers: fortran-90,
                                    fortran-77, C</span></p>
                                <p><span># If a parallel compilation is
                                    desired, MPIF90 should be a
                                    fortran-90</span></p>
                                <p><span># compiler that produces
                                    executables for parallel execution
                                    using MPI</span></p>
                                <p><span># (such as for instance mpif90,
                                    mpf90, mpxlf90,...);</span></p>
                                <p><span># otherwise, an ordinary
                                    fortran-90 compiler (f90, g95,
                                    xlf90, ifort,...)</span></p>
                                <p><span># If you have a parallel
                                    machine but no suitable candidate
                                    for MPIF90,</span></p>
                                <p><span># try to specify the directory
                                    containing "mpif.h" in IFLAGS</span></p>
                                <p><span># and to specify the location
                                    of MPI libraries in MPI_LIBS</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>MPIF90         = mpif90</span></p>
                                <p><span>#F90           = gfortran</span></p>
                                <p><span>CC             = cc</span></p>
                                <p><span>F77            = gfortran</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># C preprocessor and
                                    preprocessing flags - for explicit
                                    preprocessing,</span></p>
                                <p><span># if needed (see the
                                    compilation rules above)</span></p>
                                <p><span># preprocessing flags must
                                    include DFLAGS and IFLAGS</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>CPP            = cpp</span></p>
                                <p><span>CPPFLAGS       = -P -C
                                    -traditional $(DFLAGS) $(IFLAGS)</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># compiler flags: C, F90, F77</span></p>
                                <p><span># C flags must include DFLAGS
                                    and IFLAGS</span></p>
                                <p><span># F90 flags must include
                                    MODFLAGS, IFLAGS, and FDFLAGS with
                                    appropriate syntax</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>CFLAGS         = -O3 $(DFLAGS)
                                    $(IFLAGS)</span></p>
                                <p><span>F90FLAGS       = $(FFLAGS) -x
                                    f95-cpp-input $(FDFLAGS) $(IFLAGS)
                                    $(MODFLAGS)</span></p>
                                <p><span>FFLAGS         = -O3 -g</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># compiler flags without
                                    optimization for fortran-77</span></p>
                                <p><span># the latter is NEEDED to
                                    properly compile dlamch.f, used by
                                    lapack</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>FFLAGS_NOOPT   = -O0 -g</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># compiler flag needed by some
                                    compilers when the main program is
                                    not fortran</span></p>
                                <p><span># Currently used for Yambo</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>FFLAGS_NOMAIN   = </span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># Linker, linker-specific flags
                                    (if any)</span></p>
                                <p><span># Typically LD coincides with
                                    F90 or MPIF90, LD_LIBS is empty</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>LD             = mpif90</span></p>
                                <p><span>LDFLAGS        =  -g -pthread</span></p>
                                <p><span>LD_LIBS        = </span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># External Libraries (if any) :
                                    blas, lapack, fft, MPI</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># If you have nothing better,
                                    use the local copy :</span></p>
                                <p><span># BLAS_LIBS =
                                    /your/path/to/espresso/BLAS/blas.a</span></p>
                                <p><span># BLAS_LIBS_SWITCH = internal</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>BLAS_LIBS      =  
                                    -lmkl_gf_lp64  -lmkl_sequential
                                    -lmkl_core</span></p>
                                <p><span>BLAS_LIBS_SWITCH = external</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># If you have nothing better,
                                    use the local copy :</span></p>
                                <p><span># LAPACK_LIBS =
                                    /your/path/to/espresso/lapack-3.2/lapack.a</span></p>
                                <p><span># LAPACK_LIBS_SWITCH = internal</span></p>
                                <p><span># For IBM machines with essl
                                    (-D__ESSL): load essl BEFORE lapack
                                    !</span></p>
                                <p><span># remember that LAPACK_LIBS
                                    precedes BLAS_LIBS in loading order</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>LAPACK_LIBS    = </span></p>
                                <p><span>LAPACK_LIBS_SWITCH = external</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>ELPA_LIBS_SWITCH = disabled</span></p>
                                <p><span>SCALAPACK_LIBS =
                                    -lmkl_scalapack_lp64
                                    -lmkl_blacs_intelmpi_lp64</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># nothing needed here if the
                                    the internal copy of FFTW is
                                    compiled</span></p>
                                <p><span># (needs -D__FFTW in DFLAGS)</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>FFT_LIBS       = </span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># For parallel execution, the
                                    correct path to MPI libraries must</span></p>
                                <p><span># be specified in MPI_LIBS
                                    (except for IBM if you use mpxlf)</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>MPI_LIBS       = </span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># IBM-specific: MASS libraries,
                                    if available and if -D__MASS is
                                    defined in FDFLAGS</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>MASS_LIBS      = </span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># ar command and flags - for
                                    most architectures: AR = ar, ARFLAGS
                                    = ruv</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>AR             = ar</span></p>
                                <p><span>ARFLAGS        = ruv</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># ranlib command. If ranlib is
                                    not needed (it isn't in most cases)
                                    use</span></p>
                                <p><span># RANLIB = echo</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>RANLIB         = ranlib</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># all internal and external
                                    libraries - do not modify</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>FLIB_TARGETS   = all</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span>LIBOBJS        = ../clib/clib.a
                                    ../iotk/src/libiotk.a</span></p>
                                <p><span>LIBS           =
                                    $(SCALAPACK_LIBS) $(LAPACK_LIBS)
                                    $(FFT_LIBS) $(BLAS_LIBS) $(MPI_LIBS)
                                    $(MASS_LIBS) $(LD_LIBS)</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># wget or curl - useful to
                                    download from network</span></p>
                                <p><span>WGET = wget -O</span></p>
                                <p><span></span><br>
                                </p>
                                <p><span># Install directory - not
                                    currently used</span></p>
                                <p><span>PREFIX = /usr/local</span></p>
                                <br>
                                <p>Cheers!</p>
                                <p><br>
                                </p>
                                <p>Chong Wang</p>
                              </div>
                              <hr style="display:inline-block;width:98%">
                              <div dir="ltr"><font
                                  style="font-size:11pt" face="Calibri,
                                  sans-serif" color="#000000"><span><b>From:</b>
                                    <a moz-do-not-send="true"
                                      href="mailto:pw_forum-bounces@pwscf.org"
                                      target="_blank">pw_forum-bounces@pwscf.org</a>
                                    <<a moz-do-not-send="true"
                                      href="mailto:pw_forum-bounces@pwscf.org"
                                      target="_blank">pw_forum-bounces@pwscf.org</a>>
                                    on behalf of Paolo Giannozzi <<a
                                      moz-do-not-send="true"
                                      href="mailto:p.giannozzi@gmail.com"
                                      target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:p.giannozzi@gmail.com">p.giannozzi@gmail.com</a></a>><br>
                                  </span><b>Sent:</b> Sunday, May 15,
                                  2016 8:28:26 PM
                                  <div>
                                    <div><br>
                                      <b>To:</b> PWSCF Forum<br>
                                      <b>Subject:</b> Re: [Pw_forum] mpi
                                      error using pw.x</div>
                                  </div>
                                </font>
                                <div> </div>
                              </div>
                              <div>
                                <div>
                                  <div>
                                    <div dir="ltr">
                                      <div>It looks like a compiler/mpi
                                        bug, since there is nothing
                                        special in your input and in
                                        your execution, unless you find
                                        evidence that the problem is
                                        reproducible on other
                                        compiler/mpi versions.<br>
                                        <br>
                                      </div>
                                      Paolo<br>
                                    </div>
                                    <div class="gmail_extra"><br>
                                      <div class="gmail_quote">On Sun,
                                        May 15, 2016 at 10:11 AM, Chong
                                        Wang <span dir="ltr">
                                          <<a moz-do-not-send="true"
href="mailto:ch-wang@outlook.com" target="_blank">ch-wang@outlook.com</a>></span>
                                        wrote:<br>
                                        <blockquote class="gmail_quote"
                                          style="margin:0 0 0
                                          .8ex;border-left:1px #ccc
                                          solid;padding-left:1ex">
                                          <div dir="ltr">
                                            <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
                                                <p>Hi,</p>
                                                <p><br>
                                                </p>
                                                <p>Thank you for
                                                  replying.</p>
                                                <p><br>
                                                </p>
                                                <p>More details:</p>
                                                <p><br>
                                                </p>
                                                <p>1. input data:</p>
                                                <div>&control</div>
                                                <div>   
                                                  calculation='scf'</div>
                                                <div>   
                                                  restart_mode='from_scratch',</div>
                                                <div>    pseudo_dir =
                                                  '../pot/',</div>
                                                <div>    outdir='./out/'</div>
                                                <div>    prefix='BaTiO3'</div>
                                                <div>/</div>
                                                <div>&system</div>
                                                <div>    nbnd = 48</div>
                                                <div>    ibrav = 0, nat
                                                  = 5, ntyp = 3</div>
                                                <div>    ecutwfc = 50</div>
                                                <div>   
                                                  occupations='smearing',
                                                  smearing='gaussian',
                                                  degauss=0.02 </div>
                                                <div>/</div>
                                                <div>&electrons</div>
                                                <div>    conv_thr =
                                                  1.0e-8</div>
                                                <div>/</div>
                                                <div>ATOMIC_SPECIES</div>
                                                <div> Ba 137.327
                                                  Ba.pbe-mt_fhi.UPF</div>
                                                <div> Ti 204.380
                                                  Ti.pbe-mt_fhi.UPF</div>
                                                <div> O  15.999
                                                   O.pbe-mt_fhi.UPF</div>
                                                <div>ATOMIC_POSITIONS</div>
                                                <div> Ba
                                                  0.0000000000000000  
                                                  0.0000000000000000  
                                                  0.0000000000000000</div>
                                                <div> Ti
                                                  0.5000000000000000  
                                                  0.5000000000000000  
                                                  0.4819999933242795</div>
                                                <div> O
                                                   0.5000000000000000  
                                                  0.5000000000000000  
                                                  0.0160000007599592</div>
                                                <div> O
                                                   0.5000000000000000
                                                   -0.0000000000000000  
                                                  0.5149999856948849</div>
                                                <div> O
                                                   0.0000000000000000  
                                                  0.5000000000000000  
                                                  0.5149999856948849</div>
                                                <div>K_POINTS
                                                  (automatic)</div>
                                                <div>11 11 11 0 0 0</div>
                                                <div>CELL_PARAMETERS
                                                  {angstrom}</div>
                                                <div>3.999800000000001  
                                                      0.000000000000000
                                                       
                                                  0.000000000000000</div>
                                                <div>0.000000000000000  
                                                      3.999800000000001
                                                       
                                                  0.000000000000000</div>
                                                <div>0.000000000000000  
                                                      0.000000000000000
                                                       
                                                  4.018000000000000</div>
                                                <div><br>
                                                </div>
                                                2. number of processors:</div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">I
                                                tested 24 cores and 8
                                                cores, and both
                                                yield the same result.</div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif"><br>
                                              </div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">3.
                                                <span
                                                  style="font-family:Calibri,Arial,Helvetica,sans-serif;font-size:16px">type
                                                  of parallelization:</span></div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">I
                                                don't know your meaning.
                                                I execute pw.x by:</div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif"><span>mpirun
                                                   -np 24 pw.x < <a
moz-do-not-send="true" href="http://BTO.scf.in" target="_blank">BTO.scf.in</a>
                                                  >> output</span></div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif"><span><br>
                                                </span></div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif"><span>'which
                                                  mpirun' output:</span></div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif"><span>
                                                  <div>/opt/intel/compilers_and_libraries_2016.3.210/linux/mpi/intel64/bin/mpirun</div>
                                                </span></div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif"><br>
                                              </div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif"><span></span>4.
                                                when the error occurs:</div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">in
                                                the middle of the run.
                                                The last a few lines of
                                                the output is</div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
                                                <div>     total cpu time
                                                  spent up to now is    
                                                    32.9 secs</div>
                                                <div><br>
                                                </div>
                                                <div>     total energy  
                                                             =  
                                                   -105.97885119 Ry</div>
                                                <div>     Harris-Foulkes
                                                  estimate   =  
                                                   -105.99394457 Ry</div>
                                                <div>     estimated scf
                                                  accuracy    <      
                                                  0.03479229 Ry</div>
                                                <div><br>
                                                </div>
                                                <div>     iteration #  7
                                                      ecut=    50.00 Ry
                                                      beta=0.70</div>
                                                <div>     Davidson
                                                  diagonalization with
                                                  overlap</div>
                                                <div>     ethr =
                                                   1.45E-04,  avg # of
                                                  iterations =  2.7</div>
                                                <div><br>
                                                </div>
                                                <div>     total cpu time
                                                  spent up to now is    
                                                    37.3 secs</div>
                                                <div><br>
                                                </div>
                                                <div>     total energy  
                                                             =  
                                                   -105.99039982 Ry</div>
                                                <div>     Harris-Foulkes
                                                  estimate   =  
                                                   -105.99025175 Ry</div>
                                                <div>     estimated scf
                                                  accuracy    <      
                                                  0.00927902 Ry</div>
                                                <div><br>
                                                </div>
                                                <div>     iteration #  8
                                                      ecut=    50.00 Ry
                                                      beta=0.70</div>
                                                <div>     Davidson
                                                  diagonalization with
                                                  overlap</div>
                                                <div><br>
                                                </div>
                                              </div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">5.
                                                Error message:</div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">Something
                                                like:</div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
                                                <div>Fatal error in
                                                  PMPI_Cart_sub: Other
                                                  MPI error, error
                                                  stack:</div>
                                                <div>PMPI_Cart_sub(242)...................:
                                                  MPI_Cart_sub(comm=0xc400fcf3,
                                                  remain_dims=0x7ffc03ae5f38,
                                                  comm_new=0x7ffc03ae5e90)
                                                  failed</div>
                                                <div>PMPI_Cart_sub(178)...................: </div>
                                                <div>MPIR_Comm_split_impl(270)............: </div>
                                                <div>MPIR_Get_contextid_sparse_group(1330):
                                                  Too many communicators
                                                  (0/16384 free on this
                                                  process; ignore_id=0)</div>
                                                <div>Fatal error in
                                                  PMPI_Cart_sub: Other
                                                  MPI error, error
                                                  stack:</div>
                                                <div>PMPI_Cart_sub(242)...................:
                                                  MPI_Cart_sub(comm=0xc400fcf3,
                                                  remain_dims=0x7ffd10080408,
                                                  comm_new=0x7ffd10080360)
                                                  failed</div>
                                                <div>PMPI_Cart_sub(178)...................: </div>
                                                <div><br>
                                                </div>
                                                Cheers!</div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif"><br>
                                              </div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">Chong</div>
                                              <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
                                                <div
                                                  style="color:rgb(0,0,0)">
                                                  <hr
                                                    style="display:inline-block;width:98%">
                                                  <div dir="ltr"><font
                                                      style="font-size:11pt"
                                                      face="Calibri,
                                                      sans-serif"
                                                      color="#000000"><b>From:</b>
                                                      <a
                                                        moz-do-not-send="true"
href="mailto:pw_forum-bounces@pwscf.org" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:pw_forum-bounces@pwscf.org">pw_forum-bounces@pwscf.org</a></a>
                                                      <<a
                                                        moz-do-not-send="true"
href="mailto:pw_forum-bounces@pwscf.org" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:pw_forum-bounces@pwscf.org">pw_forum-bounces@pwscf.org</a></a>>
                                                      on behalf of Paolo
                                                      Giannozzi <<a
                                                        moz-do-not-send="true"
href="mailto:p.giannozzi@gmail.com" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:p.giannozzi@gmail.com">p.giannozzi@gmail.com</a></a>><br>
                                                      <b>Sent:</b>
                                                      Sunday, May 15,
                                                      2016 3:43 PM<br>
                                                      <b>To:</b> PWSCF
                                                      Forum<br>
                                                      <b>Subject:</b>
                                                      Re: [Pw_forum] mpi
                                                      error using pw.x</font>
                                                    <div> </div>
                                                  </div>
                                                  <div>
                                                    <div dir="ltr">
                                                      <div>
                                                        <div>
                                                          <div>Please
                                                          tell us what
                                                          is wrong and
                                                          we will fix
                                                          it.<br>
                                                          <br>
                                                          </div>
                                                          Seriously:
                                                          nobody can
                                                          answer your
                                                          question
                                                          unless you
                                                          specify, as a
                                                          strict
                                                          minimum, input
                                                          data, number
                                                          of processors
                                                          and type of
                                                          parallelization
                                                          that trigger
                                                          the error, and
                                                          where the
                                                          error occurs
                                                          (at startup,
                                                          later, in the
                                                          middle of the
                                                          run, ...).<br>
                                                          <br>
                                                        </div>
                                                        <div>Paolo<br>
                                                        </div>
                                                      </div>
                                                    </div>
                                                    <div
                                                      class="gmail_extra"><br>
                                                      <div
                                                        class="gmail_quote">On
                                                        Sun, May 15,
                                                        2016 at 7:50 AM,
                                                        Chong Wang <span
                                                          dir="ltr">
                                                          <<a
                                                          moz-do-not-send="true"
href="mailto:ch-wang@outlook.com" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:ch-wang@outlook.com">ch-wang@outlook.com</a></a>></span>
                                                        wrote:<br>
                                                        <blockquote
                                                          class="gmail_quote"
                                                          style="margin:0
                                                          0 0
                                                          .8ex;border-left:1px
                                                          #ccc
                                                          solid;padding-left:1ex">
                                                          <div dir="ltr">
                                                          <div
style="font-size:12pt;color:#000000;background-color:#ffffff;font-family:Calibri,Arial,Helvetica,sans-serif">
                                                          <div>I
                                                          compiled
                                                          quantum
                                                          espresso 5.4
                                                          with intel mpi
                                                          and mkl 2016
                                                          update 3.</div>
                                                          <div><br>
                                                          </div>
                                                          <div>However,
                                                          when I ran
                                                          pw.x the
                                                          following
                                                          errors were
                                                          reported:</div>
                                                          <div><br>
                                                          </div>
                                                          <div>...</div>
                                                          <div>MPIR_Get_contextid_sparse_group(1330):
                                                          Too many
                                                          communicators
                                                          (0/16384 free
                                                          on this
                                                          process;
                                                          ignore_id=0)</div>
                                                          <div>Fatal
                                                          error in
                                                          PMPI_Cart_sub:
                                                          Other MPI
                                                          error, error
                                                          stack:</div>
                                                          <div>PMPI_Cart_sub(242)...................:
                                                          MPI_Cart_sub(comm=0xc400fcf3,
                                                          remain_dims=0x7ffde1391dd8,
                                                          comm_new=0x7ffde1391d30)
                                                          failed</div>
                                                          <div>PMPI_Cart_sub(178)...................: </div>
                                                          <div>MPIR_Comm_split_impl(270)............: </div>
                                                          <div>MPIR_Get_contextid_sparse_group(1330):
                                                          Too many
                                                          communicators
                                                          (0/16384 free
                                                          on this
                                                          process;
                                                          ignore_id=0)</div>
                                                          <div>Fatal
                                                          error in
                                                          PMPI_Cart_sub:
                                                          Other MPI
                                                          error, error
                                                          stack:</div>
                                                          <div>PMPI_Cart_sub(242)...................:
                                                          MPI_Cart_sub(comm=0xc400fcf3,
                                                          remain_dims=0x7ffc02ad7eb8,
                                                          comm_new=0x7ffc02ad7e10)
                                                          failed</div>
                                                          <div>PMPI_Cart_sub(178)...................: </div>
                                                          <div>MPIR_Comm_split_impl(270)............: </div>
                                                          <div>MPIR_Get_contextid_sparse_group(1330):
                                                          Too many
                                                          communicators
                                                          (0/16384 free
                                                          on this
                                                          process;
                                                          ignore_id=0)</div>
                                                          <div>Fatal
                                                          error in
                                                          PMPI_Cart_sub:
                                                          Other MPI
                                                          error, error
                                                          stack:</div>
                                                          <div>PMPI_Cart_sub(242)...................:
                                                          MPI_Cart_sub(comm=0xc400fcf3,
                                                          remain_dims=0x7fffb24e60f8,
                                                          comm_new=0x7fffb24e6050)
                                                          failed</div>
                                                          <div>PMPI_Cart_sub(178)...................: </div>
                                                          <div>MPIR_Comm_split_impl(270)............: </div>
                                                          <div>MPIR_Get_contextid_sparse_group(1330):
                                                          Too many
                                                          communicators
                                                          (0/16384 free
                                                          on this
                                                          process;
                                                          ignore_id=0)</div>
                                                          <br>
                                                          <p>I googled
                                                          and found out
                                                          this might be
                                                          caused by
                                                          hitting os
                                                          limits of
                                                          number of
                                                          opened files.
                                                          However, After
                                                          I increased
                                                          number of
                                                          opened files
                                                          per process
                                                          from 1024 to
                                                          40960, the
                                                          error
                                                          persists.</p>
                                                          <p><br>
                                                          </p>
                                                          <p>What's
                                                          wrong here?</p>
                                                          <p><br>
                                                          </p>
                                                          <p>Chong Wang</p>
                                                          <p>Ph. D.
                                                          candidate</p>
                                                          <p>Institute
                                                          for Advanced
                                                          Study,
                                                          Tsinghua
                                                          University,
                                                          Beijing,
                                                          100084</p>
                                                          </div>
                                                          </div>
                                                          <br>
_______________________________________________<br>
                                                          Pw_forum
                                                          mailing list<br>
                                                          <a
                                                          moz-do-not-send="true"
href="mailto:Pw_forum@pwscf.org" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a></a><br>
                                                          <a
                                                          moz-do-not-send="true"
href="http://pwscf.org/mailman/listinfo/pw_forum" rel="noreferrer"
                                                          title="http://pwscf.org/mailman/listinfo/pw_forum
                                                          Ctrl+Click or
                                                          tap to follow
                                                          the link"
                                                          target="_blank"><a class="moz-txt-link-freetext" href="http://pwscf.org/mailman/listinfo/pw_forum">http://pwscf.org/mailman/listinfo/pw_forum</a></a><span><font
color="#888888"><br>
                                                          </font></span></blockquote>
                                                        <span></span></div>
                                                      <span><font
                                                          color="#888888"><br>
                                                          <br
                                                          clear="all">
                                                          <br>
                                                          -- <br>
                                                          <div>
                                                          <div dir="ltr">
                                                          <div>
                                                          <div dir="ltr">
                                                          <div>Paolo
                                                          Giannozzi,
                                                          Dip. Scienze
                                                          Matematiche
                                                          Informatiche e
                                                          Fisiche,<br>
                                                          Univ. Udine,
                                                          via delle
                                                          Scienze 208,
                                                          33100 Udine,
                                                          Italy<br>
                                                          Phone <a
                                                          moz-do-not-send="true"
href="tel:%2B39-0432-558216" value="+390432558216" target="_blank">+39-0432-558216</a>,
                                                          fax
                                                          <a
                                                          moz-do-not-send="true"
href="tel:%2B39-0432-558222" value="+390432558222" target="_blank">+39-0432-558222</a><br>
                                                          <br>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                          </div>
                                                        </font></span></div>
                                                  </div>
                                                </div>
                                              </div>
                                            </div>
                                          </div>
                                          <br>
_______________________________________________<br>
                                          Pw_forum mailing list<br>
                                          <a moz-do-not-send="true"
                                            href="mailto:Pw_forum@pwscf.org"
                                            target="_blank">Pw_forum@pwscf.org</a><br>
                                          <a moz-do-not-send="true"
                                            href="http://pwscf.org/mailman/listinfo/pw_forum"
                                            rel="noreferrer"
                                            target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br>
                                        </blockquote>
                                      </div>
                                      <br>
                                      <br clear="all">
                                      <span class="HOEnZb"><font
                                          color="#888888">
                                          <br>
                                          -- <br>
                                          <div>
                                            <div dir="ltr">
                                              <div>
                                                <div dir="ltr">
                                                  <div>Paolo Giannozzi,
                                                    Dip. Scienze
                                                    Matematiche
                                                    Informatiche e
                                                    Fisiche,<br>
                                                    Univ. Udine, via
                                                    delle Scienze 208,
                                                    33100 Udine, Italy<br>
                                                    Phone <a
                                                      moz-do-not-send="true"
href="tel:%2B39-0432-558216" value="+390432558216" target="_blank">+39-0432-558216</a>,
                                                    fax
                                                    <a
                                                      moz-do-not-send="true"
href="tel:%2B39-0432-558222" value="+390432558222" target="_blank">+39-0432-558222</a><br>
                                                    <br>
                                                  </div>
                                                </div>
                                              </div>
                                            </div>
                                          </div>
                                        </font></span></div>
                                    <span class="HOEnZb"><font
                                        color="#888888">
                                      </font></span></div>
                                  <span class="HOEnZb"><font
                                      color="#888888">
                                    </font></span></div>
                                <span class="HOEnZb"><font
                                    color="#888888">
                                  </font></span></div>
                              <span class="HOEnZb"><font color="#888888">
                                </font></span></div>
                            <span class="HOEnZb"><font color="#888888">
                                <br>
_______________________________________________<br>
                                Pw_forum mailing list<br>
                                <a moz-do-not-send="true"
                                  href="mailto:Pw_forum@pwscf.org"
                                  target="_blank">Pw_forum@pwscf.org</a><br>
                                <a moz-do-not-send="true"
                                  href="http://pwscf.org/mailman/listinfo/pw_forum"
                                  rel="noreferrer" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br>
                              </font></span></blockquote>
                          <span class="HOEnZb"><font color="#888888">
                            </font></span></div>
                        <span class="HOEnZb"><font color="#888888">
                            <br>
                            <br clear="all">
                            <br>
                            -- <br>
                            <div>
                              <div dir="ltr">
                                <div>
                                  <div dir="ltr">
                                    <div>Paolo Giannozzi, Dip. Scienze
                                      Matematiche Informatiche e
                                      Fisiche,<br>
                                      Univ. Udine, via delle Scienze
                                      208, 33100 Udine, Italy<br>
                                      Phone <a moz-do-not-send="true"
                                        href="tel:%2B39-0432-558216"
                                        value="+390432558216"
                                        target="_blank">+39-0432-558216</a>,
                                      fax <a moz-do-not-send="true"
                                        href="tel:%2B39-0432-558222"
                                        value="+390432558222"
                                        target="_blank">+39-0432-558222</a><br>
                                      <br>
                                    </div>
                                  </div>
                                </div>
                              </div>
                            </div>
                          </font></span></div>
                    </div>
                  </div>
                </div>
              </div>
              <br>
              _______________________________________________<br>
              Pw_forum mailing list<br>
              <a moz-do-not-send="true" href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a><br>
              <a moz-do-not-send="true"
                href="http://pwscf.org/mailman/listinfo/pw_forum"
                rel="noreferrer" target="_blank">http://pwscf.org/mailman/listinfo/pw_forum</a><br>
            </blockquote>
          </div>
          <br>
          <br clear="all">
          <br>
          -- <br>
          <div class="gmail_signature">
            <div dir="ltr">
              <div>
                <div dir="ltr">
                  <div>Paolo Giannozzi, Dip. Scienze Matematiche
                    Informatiche e Fisiche,<br>
                    Univ. Udine, via delle Scienze 208, 33100 Udine,
                    Italy<br>
                    Phone +39-0432-558216, fax +39-0432-558222<br>
                    <br>
                  </div>
                </div>
              </div>
            </div>
          </div>
        </div>
      </div>
      <br>
      <fieldset class="mimeAttachmentHeader"></fieldset>
      <br>
      <pre wrap="">_______________________________________________
Pw_forum mailing list
<a class="moz-txt-link-abbreviated" href="mailto:Pw_forum@pwscf.org">Pw_forum@pwscf.org</a>
<a class="moz-txt-link-freetext" href="http://pwscf.org/mailman/listinfo/pw_forum">http://pwscf.org/mailman/listinfo/pw_forum</a></pre>
    </blockquote>
    <br>
    <pre class="moz-signature" cols="72">-- 
PhD. Research Fellow,
Dept. of Physics & Materials Science,
City University of Hong Kong
Tel: +852 3442 4000
Fax: +852 3442 0538</pre>
  </body>
</html>