c++ - boost C++ 库 : Unit Test Assertion on % Processor Usage

Question

我正在使用 Boost.Unit 编写单元测试，在单元测试的一部分中，我正在测试的代码不得超过单个 CPU 的 50%。我如何从源代码中做出这个断言？

Answer 1

使用时间调用 - 根据手册页:

姓名 times - 获取处理时间

大纲 #include

   clock_t times(struct tms *buf);

描述 times() 将当前进程时间存储在 buf 指向的结构 tms 中。结构 tms 的定义如下:

       struct tms {
           clock_t tms_utime;  /* user time */
           clock_t tms_stime;  /* system time */
           clock_t tms_cutime; /* user time of children */
           clock_t tms_cstime; /* system time of children */
       };

   The tms_utime field contains the CPU  time  spent  executing  instructions  of  the  calling
   process.   The  tms_stime  field  contains  the CPU time spent in the system while executing
   tasks on behalf of the calling process.  The  tms_cutime  field  contains  the  sum  of  the
   tms_utime  and  tms_cutime  values  for  all waited-for terminated children.  The tms_cstime
   field contains the sum of the tms_stime and tms_cstime values for all waited-for  terminated
   children.