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vallen銀蟲 (正式寫手)
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[求助]
為什么pwscf單節(jié)點8核運行比1個核還要慢?
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我用單節(jié)點,8核運行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,里面很多重復(fù)的內(nèi)容,好像每個cpu都在各算各的,根本沒有并行 這樣還不如只用一個核心快 是不是我的命令有問題 怎么讓單機8核并行呢 |
專家顧問 (著名寫手)
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至尊木蟲 (正式寫手)
銀蟲 (正式寫手)
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是并行版本,我的開頭是這樣的,只用一個節(jié)點進行計算 ,開始就有很多重復(fù)的內(nèi)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 底下還有很多重復(fù) 好像就是8個核算得同樣的東西都放在了一個文件里 這是怎么回事,難道單節(jié)點不能多核運行嗎 |
銀蟲 (正式寫手)
金蟲 (初入文壇)
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