<div dir="ltr">Dear Prof Paulatto,<div>I installed QE6.1 without openmp option but its still giving the same error.</div><div>Any advice?</div><div><br></div><div>Thank you.</div><div>Rajesh</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Oct 15, 2017 at 5:47 PM, Rajesh <span dir="ltr"><<a href="mailto:creativeidleminds@gmail.com" target="_blank">creativeidleminds@gmail.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">Ok. Thank you Prof Paulatto.</div><div class="HOEnZb"><div class="h5"><div class="gmail_extra"><br><div class="gmail_quote">On Sun, Oct 15, 2017 at 5:33 PM, Lorenzo Paulatto <span dir="ltr"><<a href="mailto:paulatz@gmail.com" target="_blank">paulatz@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
  
    
  
  <div text="#000000" bgcolor="#FFFFFF">
    Quantum-espresso has been using MPI long before openmp,  as a result
    the MPI parallelism is more developped and more stable. I think you
    can stick to just MPI with good result, even on a single
    workstation.<br>
    <br>
    hth<div><div class="m_99285970260404047h5"><br>
    <br>
    <div class="m_99285970260404047m_6381985910875495366moz-cite-prefix">On 15/10/17 08:11, Rajesh wrote:<br>
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      <div dir="ltr">Dear Prof Paulatto ,
        <div><br>
        </div>
        <div>Than you for your response. I need to use qe for openmpi as
          well openmp but on separate workstations. I think openmp works
          better on multi-cpu pc and openmpi on multi node clusters. I
          am right?</div>
        <div><br>
        </div>
        <div>Thank you.</div>
      </div>
      <div class="gmail_extra"><br>
        <div class="gmail_quote">On Sun, Oct 15, 2017 at 12:42 AM,
          Lorenzo Paulatto <span dir="ltr"><<a href="mailto:paulatz@gmail.com" target="_blank">paulatz@gmail.com</a>></span>
          wrote:<br>
          <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><span>On 14/10/17 09:15, Rajesh wrote:<br>
              > Dear Prof Giannozzi,<br>
              > Thank you for your reply. But I need openmpi
              parallelization.<br>
              <br>
            </span>openmpi is NOT OpenMP, the former is an open-source
            implementation of<br>
            MPI, the later is shared-memory vectorization based on
            compile-time<br>
            instructions. The first is required to run in parallel, you
            need both<br>
            for huge number of CPUs.<br>
            <br>
            What do you need exactly ?<br>
            <span class="m_99285970260404047m_6381985910875495366HOEnZb"><font color="#888888"><br>
                --<br>
                Lorenzo Paulatto - Paris<br>
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    <pre class="m_99285970260404047m_6381985910875495366moz-signature" cols="72">-- 
Lorenzo Paulatto - Paris</pre>
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