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回复 1# chishanmingshen
(14) utime %lu
Amount of time that this process has been scheduled
in user mode, measured in clock ticks (divide by
sysconf(_SC_CLK_TCK)). This includes guest time,
guest_time (time spent running a virtual CPU, see
below), so that applications that are not aware of
the guest time field do not lose that time from
their calculations.
(15) stime %lu
Amount of time that this process has been scheduled
in kernel mode, measured in clock ticks (divide by
sysconf(_SC_CLK_TCK)).
(16) cutime %ld
Amount of time that this process's waited-for
children have been scheduled in user mode, measured
in clock ticks (divide by sysconf(_SC_CLK_TCK)).
(See also times(2).) This includes guest time,
cguest_time (time spent running a virtual CPU, see
below).
(17) cstime %ld
Amount of time that this process's waited-for
children have been scheduled in kernel mode,
measured in clock ticks (divide by
sysconf(_SC_CLK_TCK)).
就是被wait for的子进程所花掉的用户态时间和内核态时间呀。和utime、stime的差别是,前者记录的是小孩的,后者记录的是自己的。 waited-for children 应该是指我们在父进程调用wait 函数所等待的子进程的意思(见下面的man说明)。
cutime不仅仅出现在proc接口里,更重要的也是times系统调用的输出(http://linux.die.net/man/2/times), 为什么要提times?估计你用过time吧(http://linux.die.net/man/1/time)。很经典的一个命令,估计cutime是为它而生的。 |
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