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[求助]
为什么pwscf单节点8核运行比1个核还要慢?
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我用单节点,8核运行pw.x mpirun -n 8 ./pw.x -input xx.in > log 察看了一下，cpu占用率都只有50%左右， 看了一下log文件，里面很多重复的内容，好像每个cpu都在各算各的，根本没有并行 这样还不如只用一个核心快 是不是我的命令有问题 怎么让单机8核并行呢 |
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是并行版本，我的开头是这样的，只用一个节点进行计算 ，开始就有很多重复的内容 WARNING: Unable to read mpd.hosts or list of hosts isn't provided. MPI job will be run on the current machine only. Program PWSCF v.5.0.2 (svn rev. 9392) starts on 25Feb2013 at 14:37:24 This program is part of the open-source Quantum ESPRESSO suite for quantum simulation of materials; please cite "P. Giannozzi et al., J. Phys.:Condens. Matter 21 395502 (2009); URL http://www.quantum-espresso.org", in publications or presentations arising from this work. More details at http://www.quantum-espresso.org/quote.php Parallel version (MPI), running on 1 processors Current dimensions of program PWSCF are: Max number of different atomic species (ntypx) = 10 Max number of k-points (npk) = 40000 Max angular momentum in pseudopotentials (lmaxx) = 3 Reading input from pt.2.in Program PWSCF v.5.0.2 (svn rev. 9392) starts on 25Feb2013 at 14:37:24 This program is part of the open-source Quantum ESPRESSO suite for quantum simulation of materials; please cite "P. Giannozzi et al., J. Phys.:Condens. Matter 21 395502 (2009); URL http://www.quantum-espresso.org", in publications or presentations arising from this work. More details at http://www.quantum-espresso.org/quote.php Parallel version (MPI), running on 1 processors 底下还有很多重复 好像就是8个核算得同样的东西都放在了一个文件里 这是怎么回事，难道单节点不能多核运行吗 |
4楼2013-02-26 18:46:42
5楼2013-02-27 10:46:42