{"action":"created","issue":{"url":"https://api.github.com/repos/geodynamics/specfem2d/issues/290","labels_url":"https://api.github.com/repos/geodynamics/specfem2d/issues/290/labels{/name}","comments_url":"https://api.github.com/repos/geodynamics/specfem2d/issues/290/comments","events_url":"https://api.github.com/repos/geodynamics/specfem2d/issues/290/events","html_url":"https://github.com/geodynamics/specfem2d/issues/290","id":69064876,"number":290,"title":"Weird results from example Rayleigh_wave_with_crack","user":{"login":"wanglongqi","id":6874783,"avatar_url":"https://avatars.githubusercontent.com/u/6874783?v=3","gravatar_id":"","url":"https://api.github.com/users/wanglongqi","html_url":"https://github.com/wanglongqi","followers_url":"https://api.github.com/users/wanglongqi/followers","following_url":"https://api.github.com/users/wanglongqi/following{/other_user}","gists_url":"https://api.github.com/users/wanglongqi/gists{/gist_id}","starred_url":"https://api.github.com/users/wanglongqi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/wanglongqi/subscriptions","organizations_url":"https://api.github.com/users/wanglongqi/orgs","repos_url":"https://api.github.com/users/wanglongqi/repos","events_url":"https://api.github.com/users/wanglongqi/events{/privacy}","received_events_url":"https://api.github.com/users/wanglongqi/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-04-17T05:18:42Z","updated_at":"2015-04-17T20:59:23Z","closed_at":null,"body":"I am new to this software. I start running examples in the `EXAMPLES` folder. I find following weird behavior of the program.\r\n\r\nIn `Rayleigh_wave_with_crack` example, if you change `nproc   = 4 `, the outputs are different with `nproc   = 1`. \r\n\r\nFor `np=1`, I get following output: https://youtu.be/ztzRk1ccUpc ,\r\nFor `np=4`, I get following output: http://youtu.be/wv5ekGsURaQ .\r\n\r\nI think the results should keep the same for different np. Do I make a mistake here?\r\n"},"comment":{"url":"https://api.github.com/repos/geodynamics/specfem2d/issues/comments/94074317","html_url":"https://github.com/geodynamics/specfem2d/issues/290#issuecomment-94074317","issue_url":"https://api.github.com/repos/geodynamics/specfem2d/issues/290","id":94074317,"user":{"login":"komatits","id":5817129,"avatar_url":"https://avatars.githubusercontent.com/u/5817129?v=3","gravatar_id":"","url":"https://api.github.com/users/komatits","html_url":"https://github.com/komatits","followers_url":"https://api.github.com/users/komatits/followers","following_url":"https://api.github.com/users/komatits/following{/other_user}","gists_url":"https://api.github.com/users/komatits/gists{/gist_id}","starred_url":"https://api.github.com/users/komatits/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/komatits/subscriptions","organizations_url":"https://api.github.com/users/komatits/orgs","repos_url":"https://api.github.com/users/komatits/repos","events_url":"https://api.github.com/users/komatits/events{/privacy}","received_events_url":"https://api.github.com/users/komatits/received_events","type":"User","site_admin":false},"created_at":"2015-04-17T20:59:23Z","updated_at":"2015-04-17T20:59:23Z","body":"\nThat example is the only one that cannot run in parallel (i.e. with \nMPI), because I use a trick inside the code to include a mathematical \ncrack. Thus always run it with nproc = 1. I'll add a note in the README \nfile of that example.\n\nDimitri.\n\nOn 04/17/2015 07:18 AM, WANG Longqi wrote:\n> I am new to this software. I start running examples in the |EXAMPLES|\n> folder. I find following weird behavior of the program.\n>\n> In |Rayleigh_wave_with_crack| example, if you change |nproc = 4|, the\n> outputs are different with |nproc = 1|.\n>\n> For |np=1|, I get following output: https://youtu.be/ztzRk1ccUpc ,\n> For |np=4|, I get following output: http://youtu.be/wv5ekGsURaQ .\n>\n> I think the results should keep the same for different np. Do I make a\n> mistake here?\n>\n> —\n> Reply to this email directly or view it on GitHub\n> <https://github.com/geodynamics/specfem2d/issues/290>.\n>\n\n-- \nDimitri Komatitsch\nCNRS Research Director (DR CNRS), Laboratory of Mechanics and Acoustics,\nUPR 7051, Marseille, France    http://komatitsch.free.fr\n"}}