Created by Jerry Wang, last modified on May 05, 2014 Go to start of metadata

設計一個function module 模擬一個比較花費CPU計算時間的time consuming task.

FUNCTION zinsert. *"---------------------------------------------------------------------- *"*"Local Interface: *" IMPORTING *" VALUE(IV_INDEX) TYPE COMM_PRODUCT-PRODUCT_ID *"----------------------------------------------------------------------DATA: ls_line TYPE zjerry1,lv_cal TYPE timestamp,lv_cal1 TYPE timestamp.GET TIME STAMP FIELD lv_cal.DO 10000 TIMES.lv_cal = lv_cal + 1.lv_cal = ( lv_cal * 13 ) / 12.DO 100 TIMES.GET TIME STAMP FIELD lv_cal1.lv_cal = lv_cal * 13 / 17.ENDDO.ENDDO.ls_line-code_value = iv_index.INSERT zjerry1 FROM ls_line.ASSERT sy-subrc = 0.COMMIT WORK AND WAIT.ENDFUNCTION.

在function 執行末尾會有一個database 的insert operation. Database table structure如下:

下面的report可以比較兩種調用ZINSERT 方式的性能差異.

方法1是在循環里順序調用ZINSERT，每次function call結束之后再進行下一次function調用。方法二是采用asynchronous RFC call的方式來并發操作.

兩種方式的性能差異見如下圖:

REPORT ztable.PARAMETERS: num TYPE i OBLIGATORY DEFAULT 10. DATA:ls_line TYPE zjerry1,lv_start TYPE i,lv_end TYPE i,lv_taskid TYPE c LENGTH 8,lv_index TYPE c LENGTH 4,lv_finished TYPE i,lv_count TYPE i.START-OF-SELECTION.PERFORM solution1.PERFORM solution2.FORM solution1.DELETE FROM zjerry1.GET RUN TIME FIELD lv_start.DO num TIMES.CALL FUNCTION 'ZINSERT'EXPORTINGiv_index = CONV comm_product-product_id( sy-index ).ENDDO.GET RUN TIME FIELD lv_end.lv_end = lv_end - lv_start.WRITE: / 'solution1: ' , lv_end COLOR COL_NEGATIVE. ENDFORM.FORM solution2.DELETE FROM zjerry1.GET RUN TIME FIELD lv_start.DO num TIMES.lv_index = sy-index.lv_taskid = 'Task' && lv_index.CALL FUNCTION 'ZINSERT' STARTING NEW TASK lv_taskid PERFORMING callback ON END OF TASKEXPORTINGiv_index = CONV comm_product-product_id( sy-index ).ENDDO.WAIT UNTIL lv_finished = num.GET RUN TIME FIELD lv_end.lv_end = lv_end - lv_start.WRITE: / 'Solution2: ' , lv_end COLOR COL_NEGATIVE.SELECT COUNT( * ) INTO lv_count FROM zjerry1.ASSERT lv_count = num. ENDFORM.FORM callback USING p_task TYPE clike.ADD 1 TO lv_finished. ENDFORM.

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