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)

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。

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

           

         

       
      

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

父主题： 使用Roofline进行性能分析