利用region模式整体分析对比

图1 case 9

region模式支持多个函数或循环的插桩，可以将多个method在一个新的case中依次运行，示例中增加method 9，依次调用以下method：

• 1(parallel_matmult)
• 2(transpose_B_matmult)
• 4(block_transpose_B_matmult)
• 5(intrinsics_transpose_B_matmult)
• 6(kml_matmult_8192)

1. 运行矩阵行列大小为8192的multi_method_matmult示例。

   ./matmul 8192 9

   返回信息如下：

   Size is 8192, Matrix multiplication method is: 9, Check correctness is: 0
   Initialization time = 2.663596s
   Matrix multiplication time(parallel_matmult) = 524.732915s
   Matrix multiplication time(transpose_B_matmult) = 12.199910s
   Matrix multiplication time(block_transpose_B_matmult) = 3.940094s
   Matrix multiplication time(intrinsics_transpose_B_matmult) = 2.543300s
   Matrix multiplication time(kml_matmult) = 0.320360s
   Matrix multiplication time = 543.736720s

   可以依次看到各个method所花的时间。

2. 创建multi_method_matmult 8192 case的Roofline任务。

   devkit tuner roofline -o multi_method_matmult_8192 -m region ./matmul 8192 9

   返回信息如下：

   Note:
     1. Roofline task is currently only supported on the 920 platform.
     2. The application must be a binary file in ELF format.
     3. Roofline task collection needs to ensure the application has finished running.
     4. The estimated time of roofline collection is about 3 * application estimated time.
     5. You can learn about the roofline profiling method by looking at document /usr/local/devkit/tuner/docs/ROOFLINE_KNOW_HOW.MD
   RFCOLLECT: Start collection for ./matmul
   RFCOLLECT: Launch application to collect performance metrics of ./matmul
   Size is 8192, Matrix multiplication method is: 9, Check correctness is: 0
   Initialization time = 2.712200s
   ROOFLINE_EVENTS are initialized.
   Matrix multiplication time(parallel_matmult) = 522.059154s
   Matrix multiplication time(transpose_B_matmult) = 10.515641s
   Matrix multiplication time(block_transpose_B_matmult) = 3.325110s
   Matrix multiplication time(intrinsics_transpose_B_matmult) = 2.258315s
   Matrix multiplication time(kml_matmult) = 0.287929s
   Matrix multiplication time = 538.468327s
   RFCOLLECT: Launch application to do binary instrumentation of ./matmul
   Size is 8192, Matrix multiplication method is: 9, Check correctness is: 0
   Initialization time = 8.095281s
   Matrix multiplication time(parallel_matmult) = 348.475675s
   Matrix multiplication time(transpose_B_matmult) = 17.144564s
   Matrix multiplication time(block_transpose_B_matmult) = 3.646071s
   Matrix multiplication time(intrinsics_transpose_B_matmult) = 2.427023s
   Matrix multiplication time(kml_matmult) = 0.297098s
   Matrix multiplication time = 371.991296s
   RFCOLLECT: Launch benchmarks for measuring roofs
   RFCOLLECT: Processing all collected data
   RFCOLLECT: Result is captured at /matrix_multiplication/rfcollect-20240507-115538.json
   RFCOLLECT: Run "rfreport /matrix_multiplication/rfcollect-20240507-115538.json" to get report.
   
   Get roofline report ...
   The roofline json report: /matrix_multiplication/multi_method_matmult_8192.json
   The roofline html report: /matrix_multiplication/multi_method_matmult_8192.html

3. 查看multi_method_matmult_8192报告。
   可以将并行示例至KML示例的示例汇聚到一张图上，便捷地进行相关分析。

   图2 multi_method_matmult_8192报告