report-knob

例

この例は、HPC パフォーマンス特性解析結果のサマリーレポートを生成して、問題の説明をスキップします。

    vtune -report summary -r r001hpc -report-knob show-issues=false 
    vtune: Executing actions 75 % Generating a report 
    Elapsed Time: 23.182s 
    GFLOPS: 14.748 
    CPU Utilization: 58.0% 
         Average CPU Usage: 13.920 Out of 24 logical CPUs 
         Serial Time: 0.069s (0.3%) 
         Parallel Region Time: 23.113s (99.7%) 
              Estimated Ideal Time: 14.010s (60.4%) 
              OpenMP Potential Gain: 9.103s (39.3%) 
    Memory Bound: 0.446 
         Cache Bound: 0.175 
         DRAM Bound: 0.216 
         NUMA: % of Remote Accesses: 38.3% 
    FPU Utilization: 2.7% 
         GFLOPS: 14.748 
              Scalar GFLOPS: 4.801 
              Packed GFLOPS: 9.947 
    Collection and Platform Info 
         Application Command Line: ./sp.B.x 
         User Name: vtune 
         Operating System: 3.10.0-327.el7.x86_64 
              NAME="Red Hat Enterprise Linux Server" 
              VERSION="7.2 (Maipo)" ID="rhel" 
              ID_LIKE="fedora" VERSION_ID="7.2" PRETTY_NAME="Red Hat Enterprise Linux Server 7.2 (Maipo)" 
              ANSI_COLOR="0;31" CPE_NAME="cpe:/o:redhat:enterprise_linux:7.2:GA:server" 
              HOME_URL="https://w ww.redhat.com/" BUG_REPORT_URL="https://bugzilla.redhat.com/" 
              REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7" REDHAT_BUGZILLA_PRODUCT_VERSION=7. 2 
              REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux" REDHAT_SUPPORT_PRODUCT_VERSION="7.2" 
         Computer Name: test 
         Result Size: 1 GB 
         Collection start time: 19:04:30 13/07/2016 UTC 
         Collection stop time: 19:04:53 13/07/2016 UTC 
         Name: Intel® Xeon® E5/E7 v2 Processor code named Ivytown 
         Frequency: 2.694 GHz 
         Logical CPU Count: 24 
         CPU 
              Name: Intel® Xeon® E5/E7 v2 Processor code named Ivytown 
              Frequency: 2.694 GHz 
              Logical CPU Count: 24

この例は、HPC パフォーマンス特性解析結果のサマリーレポートを生成して、問題の説明を表示します。

    vtune -report summary -r r001hpc -report-knob show-issues=true 
    vtune: Executing actions 75 % Generating a report 
    Elapsed Time: 23.182s 
    GFLOPS: 14.748 
    CPU Utilization: 58.0%
     | The metric value is low, which may signal a poor logical CPU cores
     | utilization caused by load imbalance, threading runtime overhead, contended
     | synchronization, or thread/process underutilization. Explore CPU Utilization
     | sub-metrics to estimate the efficiency of MPI and OpenMP parallelism or run
     | the Threading analysis to identify parallel bottlenecks for other
     | parallel runtimes.
     | 
         Average CPU Usage: 13.920 Out of 24 logical CPUs 
         Serial Time: 0.069s (0.3%) 
         Parallel Region Time: 23.113s (99.7%) 
              Estimated Ideal Time: 14.010s (60.4%) 
              OpenMP Potential Gain: 9.103s (39.3%) 
                | The time wasted on load imbalance or parallel work arrangement is 
                | significant and negatively impacts the application performance and 
                | scalability. Explore OpenMP regions with the highest metric values. 
                | Make sure the workload of the regions is enough and the loop schedule 
                | is optimal. 
                | 
    ...