Dear Wangqj,<br>The same thing happens to me.<br>since you are using large no. of wfc, although it shows the job is running in 8 procs, but sometimes if the installation is not proper, it is running in 1 procs only.<br><br>
So better you check the parallel installation using a small job, with different no. of procs and see whether its taking lesser time as no. of procs increases or not?<br><br>cheers<br><br><div class="gmail_quote">2009/9/6 wangqj1 <span dir="ltr"><<a href="mailto:wangqj1@126.com">wangqj1@126.com</a>></span><br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div><br>Dear pwscf users</div>
<div> When I run vc-relax on the computing cluster use one node which has 8 CPUs.<br>The output file is as following:</div>
<div> </div>
<div>Program PWSCF v.4.0.1 starts ...<br> Today is 6Sep2009 at 7:49:30 </div>
<div> Parallel version (MPI)</div>
<div> Number of processors in use: 8<br> R & G space division: proc/pool = 8</div>
<div> For Norm-Conserving or Ultrasoft (Vanderbilt) Pseudopotentials or PAW</div>
<div>.....................................................................</div>
<div> Initial potential from superposition of free atoms</div>
<div> starting charge 435.99565, renormalised to 436.00000<br> Starting wfc are 254 atomic + 8 random wfc</div>
<div> </div>
<div>After one day ,it still like this and no iteration has completed ,there is also no error was turn up .There is no error in the input file because I have test it on anthoer computer which has 4 CPUs and it runs well .</div>
<div>I can't find the reason about this ,any help will be appreciated .</div>
<div>Best Regards</div>
<div>Q.J.Wang</div>
<div>XiangTan University</div>
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<br></blockquote></div><br><br clear="all"><br>-- <br>Dr. Bipul Rakshit<br>Research Associate,<br>S N Bose Centre for Basic Sciences,<br>Salt Lake,<br>Kolkata 700 098<br>India<br>