Question

我正在尝试在我的CPU上配置一组进程。为了非常精确，我想使用perf stat命令查看我的进程使用了多少CPU周期。这与top不同，我只看到快照中使用的CPU的百分比。

不幸的是，我没有找到同时分析多个进程的方法。这可能吗？

作为第二个问题：是否有可能不仅看到使用的CPU周期，还能看到在同一时间间隔内使用的CPU周期总量（或百分比）？

Answer 1

你可以尝试为你想要的每个pid运行perf stat -p PID1,PID2,PID3（用pidof，pgrep等获取它们......）http://man7.org/linux/man-pages/man1/perf-stat.1.html

 -p, --pid=<pid>
    stat events on existing process id (comma separated list)

还有一个有用的-I msecs选项可以启用定期打印，--per-thread可以分隔线程。

还可以使用perf stat -a或某些--per- *选项尝试系统级-A：http://man7.org/linux/man-pages/man1/perf-stat.1.html

   -a, --all-cpus
       system-wide collection from all CPUs (default if no target is
       specified)
   -A, --no-aggr
       Do not aggregate counts across all monitored CPUs.

   --per-socket
       Aggregate counts per processor socket for system-wide mode
       measurements. This is a useful mode to detect imbalance between
       sockets. To enable this mode, use --per-socket in addition to -a.
       (system-wide). The output includes the socket number and the
       number of online processors on that socket. This is useful to
       gauge the amount of aggregation.

   --per-core
       Aggregate counts per physical processor for system-wide mode
       measurements. This is a useful mode to detect imbalance between
       physical cores. To enable this mode, use --per-core in addition
       to -a. (system-wide). The output includes the core number and the
       number of online logical processors on that physical processor.

   --per-thread
       Aggregate counts per monitored threads, when monitoring threads
       (-t option) or processes (-p option).

Linux perf工具 - 如何同步分析多个进程？如何提取CPU周期百分比？

1 个答案: