zoukankan      html  css  js  c++  java
  • perf 工具介绍3

    http://blog.chinaunix.net/uid-10540984-id-3854969.html

    http://blog.csdn.net/zhangskd/article/details/37902159

    [root@localhost ~]# perf record -e cpu-clock ./t1
    [ perf record: Woken up 1 times to write data ]
    [ perf record: Captured and wrote 0.003 MB perf.data (~137 samples) ]
    [root@localhost ~]# perf report
    # Samples: 102
    #
    # Overhead  Command  Shared Object  Symbol
    # ........  .......  .............  ......
    #
        99.02%       t1  ./t1           [.] longa
         0.98%       t1  [kernel]       [k] do_page_fault

    -----------------------------------------------------------------------------

    usage: perf top [<options>]
    
        -e, --event <event>   event selector. use 'perf list' to list available events
        -c, --count <n>       event period to sample
        -p, --pid <n>         profile events on existing pid
        -a, --all-cpus        system-wide collection from all CPUs
        -C, --CPU <n>         CPU to profile on
        -k, --vmlinux <file>  vmlinux pathname
        -m, --mmap-pages <n>  number of mmap data pages
        -r, --realtime <n>    collect data with this RT SCHED_FIFO priority
        -d, --delay <n>       number of seconds to delay between refreshes
        -D, --dump-symtab     dump the symbol table used for profiling
        -f, --count-filter <n>
                              only display functions with more events than this
        -g, --group           put the counters into a counter group
        -i, --inherit         child tasks inherit counters
        -s, --sym-annotate <symbol name>
                              symbol to annotate - requires -k option
        -z, --zero            zero history across updates
        -F, --freq <n>        profile at this frequency
        -E, --entries <n>     display this many functions
        -v, --verbose         be more verbose (show counter open errors, etc)
  • 相关阅读:
    The Fifth Season Gym
    SuperHyperMarket Gym
    Far Manager Gym
    Game Map------Gym
    Happy Number
    Pursuing the Happiness
    Digit sum-----The Preliminary Contest for ICPC Asia Shanghai 2019
    Light bulbs------The Preliminary Contest for ICPC Asia Shanghai 2019
    P2921 [USACO08DEC]在农场万圣节Trick or Treat on the Farm
    HDU 1203 I NEED A OFFER!
  • 原文地址:https://www.cnblogs.com/zengkefu/p/4943769.html
Copyright © 2011-2022 走看看