Hi,
Le Thu, 20 Jul 2006 19:36:37 +0800,
"Hsin-An Chen@NTHU" <g946301@xxxxxxxxxxxxxx> a écrit :
> I am doing some timing analysis in kernel 2.6.15.
> I want to collect the 'utime' and 'stime' information inside
> task_struct from a user space application.
What about using:
$ time your_command
?
It gives an output such as:
0.00user 0.00system 0:00.04elapsed 11%CPU
(0avgtext+0avgdata0maxresident)k
0inputs+0outputs (1major+263minor)pagefaults 0swaps
Or if you don't want to do it from the shell, you can use the times(2)
function.
$ man 2 times
[...]
NAME
times - get process times
[...]
DESCRIPTION
The times() function stores the current process times in
the struct tms that buf points to. The struct tms is as defined
in <sys/times.h>:
struct tms {
clock_t tms_utime; /* user time */
clock_t tms_stime; /* system time */
clock_t tms_cutime; /* user time of dead children */
clock_t tms_cstime; /* system time of dead children */
};
The tms_utime field contains the CPU time spent executing
instructions of the calling process. The tms_stime field con-
tains 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.
[...]
Sincerly,
Thomas
--
Thomas Petazzoni - thomas.petazzoni@xxxxxxxx
http://{thomas,sos,kos}.enix.org - http://www.toulibre.org
http://www.{livret,agenda}dulibre.org
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