Lin Wrote:
>Hi all,
>
>I would like to track the system response time on kernel 2.6.
>
>Does anyone know if use Linux Security Module (LSM) mechanism is a good
way to track the system response time?
>
>My idea is to hook some system calls as open, read and write operations
and log the status (for instance the current >time) of each one to a
file and after that post process the log file to figure out the system
response time. Is it >feasible?
>
>BR,
>
>Mauricio Lin
Dear Lin,
I have the small sample code which will print the time wherever you want
to print it. I used it in my modules for getting the time value to
compare the performance of the code.
static unsigned int ms = 0;
static struct timeval start_tm,cur_tm;
do_gettimeofday(&start_tm);
ms = (cur_tm.tv_sec*1000000+cur_tm.tv_usec)-
(start_tm.tv_sec*1000000+start_tm.tv_usec) + 1;
printk("%10ld.%3ld ms",ms/1000, ms%1000);
Call the system call
do_gettimeofday( &cur_tm );
ms = (cur_tm.tv_sec*1000000+cur_tm.tv_usec)-
(start_tm.tv_sec*1000000+start_tm.tv_usec) + 1;
printk("%10ld.%3ld ms",ms/1000, ms%1000);
Regards,
Srinivas G
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