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paulatto authored
Added a check when running in parallel to assure that every processor converges at the same time. This is always true in principle but relies on duplicated calculation of dv_of_drho and mix_potential. It can also be true in case of bugs, which should now be detected more easily. git-svn-id: http://qeforge.qe-forge.org/svn/q-e/trunk/espresso@8715 c92efa57-630b-4861-b058-cf58834340f0
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