Changes between Version 5 and Version 6 of YMU110509/Lab2

Timestamp:

May 9, 2011, 12:08:03 PM (13 years ago)

Author:

jazz

Comment:

--

YMU110509/Lab2

@@ -12 +12 @@
  * GCC 4.2 以上版本就有支援 OpenMP 了....用 "gcc '''-fopenmp'''" 就可以編譯
 
-= Example 1 : HelloWorld ==
+== Example 1 : !HelloWorld ==
 
  * 首先從 [https://computing.llnl.gov/tutorials/openMP/exercise.html OpenMP Exercise] 下載 omp_hello.c
@@ -41 +41 @@
 }}}
 
-= OpenMP 參考資料 =
+== Example 2 : Loop work-sharing ==
+
+ * 首先從 [https://computing.llnl.gov/tutorials/openMP/exercise.html OpenMP Exercise] 下載 omp_workshare1.c
+{{{
+~$ wget https://computing.llnl.gov/tutorials/openMP/samples/C/omp_workshare1.c
+}}}
+ * 使用 GCC 編譯 omp_workshare1.c
+{{{
+~$ gcc -o omp_workshare1 -fopenmp omp_workshare1.c
+}}}
+ * 執行 omp_workshare1 執行檔
+{{{
+~$ ./omp_workshare1
+~$ ./omp_workshare1
+Thread 3 starting...
+Thread 1 starting...
+Number of threads = 4
+Thread 0 starting...
+Thread 0: c[20]= 40.000000
+Thread 0: c[21]= 42.000000
+Thread 0: c[22]= 44.000000
+Thread 0: c[23]= 46.000000
+Thread 0: c[24]= 48.000000
+Thread 0: c[25]= 50.000000
+
+ ... skipped ... 
+
+Thread 2 starting...
+Thread 2: c[90]= 180.000000
+Thread 2: c[91]= 182.000000
+Thread 2: c[92]= 184.000000
+Thread 2: c[93]= 186.000000
+Thread 2: c[94]= 188.000000
+
+ ... skipped ... 
+
+Thread 3: c[0]= 0.000000
+Thread 3: c[1]= 2.000000
+Thread 3: c[2]= 4.000000
+Thread 3: c[3]= 6.000000
+Thread 3: c[4]= 8.000000
+Thread 3: c[5]= 10.000000
+ 
+ ... skipped ... 
+
+Thread 1: c[10]= 20.000000
+Thread 1: c[11]= 22.000000
+Thread 1: c[12]= 24.000000
+Thread 1: c[13]= 26.000000
+Thread 1: c[14]= 28.000000
+
+}}}
+
+== OpenMP 參考資料 ==
 
  * 多核心平行化程式設計 Multi-Cores Programming