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  • likwid工具尝鲜

    likwid: like I knew what I am doing.

    是一系列工具的集合,用于针对多线程程序的指标分析,方便程序员进行性能调优工作。可以深入到控制cpu等硬件的频率。

    主要包括以下小工具:

    likwid-topology: Show the thread and cache topology
    likwid-perfctr: Measure hardware performance counters on Intel and AMD processors
    likwid-features: Show and Toggle hardware prefetch control bits on Intel Core 2 processors
    likwid-pin: Pin your threaded application without touching your code (supports pthreads, Intel OpenMP and gcc OpenMP)
    likwid-bench: Benchmarking framework allowing rapid prototyping of threaded assembly kernels
    likwid-mpirun: Script enabling simple and flexible pinning of MPI and MPI/threaded hybrid applications
    likwid-perfscope: Frontend for likwid-perfctr timeline mode. Allows live plotting of performance metrics.
    likwid-powermeter: Tool for accessing RAPL counters and query Turbo mode steps on Intel processor.
    likwid-memsweeper: Tool to cleanup ccNUMA memory domains and force eviction of dirty cachelines from caches.
    likwid-setFrequencies: Tool to set specific processor frequencies.

    使用案例:

    likwid-topology 
    -------------------------------------------------------------
    CPU type:    Intel Core IvyBridge processor
    *************************************************************
    Hardware Thread Topology
    *************************************************************
    Sockets:    4 
    Cores per socket:    1 
    Threads per core:    1 
    -------------------------------------------------------------
    HWThread    Thread        Core        Socket
    0        0        0        0
    1        0        0        2
    2        0        0        4
    3        0        0        6
    -------------------------------------------------------------
    Socket 0: ( 0 )
    Socket 2: ( 1 )
    Socket 4: ( 2 )
    Socket 6: ( 3 )
    -------------------------------------------------------------
    
    *************************************************************
    Cache Topology
    *************************************************************
    Level:    1
    Size:    32 kB
    Cache groups:    ( 0 ) ( 1 ) ( 2 ) ( 3 )
    -------------------------------------------------------------
    Level:    2
    Size:    256 kB
    Cache groups:    ( 0 ) ( 1 ) ( 2 ) ( 3 )
    -------------------------------------------------------------
    Level:    3
    Size:    6 MB
    Cache groups:    ( 0 ) ( 1 ) ( 2 ) ( 3 )
    -------------------------------------------------------------
    
    *************************************************************
    NUMA Topology
    *************************************************************
    NUMA domains: 1 
    -------------------------------------------------------------
    Domain 0:
    Processors:  0 1 2 3
    Relative distance to nodes:  10
    Memory: 1132.52 MB free of total 8191.43 MB
    -------------------------------------------------------------

    download: http://ftp.fau.de/pub/likwid/

    1. http://ftp.fau.de/pub/likwid/likwid-stable.tar.gz

    2. http://files.cnblogs.com/files/ToDoToTry/likwid-stable.tar.gz

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  • 原文地址:https://www.cnblogs.com/ToDoToTry/p/4453141.html
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