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longma135金虫 (小有名气)
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[求助]
请教下begin_c_loop和begin_c_loop_all的区别 已有1人参与
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| 搜了一些解释，还是没弄明白，求解答 |
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【答案】应助回帖
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感谢参与，应助指数 +1
longma135: 金币+5, ★★★★★最佳答案 2014-02-27 08:50:47
感谢参与，应助指数 +1
longma135: 金币+5, ★★★★★最佳答案 2014-02-27 08:50:47
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特地去查了一下，找到如下解释： 1. begin, end_c_loop macro is used for looping over all the cells in particular thread for serial processing. 2. For parallel processing, the cells inside a partition can be categorized as interior and exterior cells. 3. The macros begin, end_c_loop_int; begin, end_c_loop_ext and begin, end_c_loop_all are used for looping over interior, exterior and all the cells (in a partition) respectively. 4. In parallel simulations, both begin, end_c_loop and begin, end_c_loop_all macros will do the same job. 5. For faces the looping macro in parallel are begin, end_f_loop_int; begin, end_f_loop_ext and begin, end_f_loop for looping over interior, boundary and all faces respectively. For all practical purpose, the user need not separate the interior and boundary faces of a partition. Hence, begin, end_f_loop_int and begin, end_f_loop_ext macros are rarely used. Please refer to section 10.5.5 of Fluent 6.2 User's guide for more information. http://www.fluentusers.com/fluent/doc/ori/html/udf/node257.htm 再加上百度知道这个回答（http://zhidao.baidu.com/link?url ... VQkNAruWFO9xV7J32BK） 把这个宏展开其实就清楚了 其实串行时，两者是相同的；并行时，host 节点两者相同，node 节点两者不一样，可能是 #if !RP_NODE # define begin_c_loop_all begin_c_loop # define end_c_loop_all end_c_loop #else # define begin_c_loop(c,t) begin_generic_loop_1(c,t,THREAD_N_ELEMENTS_INT(t)+THREAD_N_ELEMENTS_LAYER(t,LAYER_PRIMARY)){ # define end_c_loop }end_generic_loop_1 # define begin_c_loop_all(c,t) begin_generic_loop_1(c,t,C_THREAD_N_ELEMENTS_ALL(t)){ # define end_c_loop_all }end_generic_loop_1 #endif /* RP_NODE */ 应该就明白了 |
2楼2014-02-26 22:52:33
