STRUCT TASK_CPUTIME(9) Driver Basics STRUCT TASK_CPUTIME(9)NAME
struct_task_cputime - collected CPU time counts
SYNOPSIS
struct task_cputime {
cputime_t utime;
cputime_t stime;
unsigned long long sum_exec_runtime;
};
MEMBERS
utime
time spent in user mode, in cputime_t units
stime
time spent in kernel mode, in cputime_t units
sum_exec_runtime
total time spent on the CPU, in nanoseconds
DESCRIPTION
This is an extension of struct cputime that includes the total runtime spent by the task from the scheduler point of view.
As a result, this structure groups together three kinds of CPU time that are tracked for threads and thread groups. Most things considering
CPU time want to group these counts together and treat all three of them in parallel.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 STRUCT TASK_CPUTIME(9)
Check Out this Related Man Page
STRUCT HRTIMER(9) Driver Basics STRUCT HRTIMER(9)NAME
struct_hrtimer - the basic hrtimer structure
SYNOPSIS
struct hrtimer {
struct rb_node node;
ktime_t _expires;
ktime_t _softexpires;
enum hrtimer_restart (* function) (struct hrtimer *);
struct hrtimer_clock_base * base;
unsigned long state;
#ifdef CONFIG_TIMER_STATS
int start_pid;
void * start_site;
char start_comm[16];
#endif
};
MEMBERS
node
red black tree node for time ordered insertion
_expires
the absolute expiry time in the hrtimers internal representation. The time is related to the clock on which the timer is based. Is
setup by adding slack to the _softexpires value. For non range timers identical to _softexpires.
_softexpires
the absolute earliest expiry time of the hrtimer. The time which was given as expiry time when the timer was armed.
function
timer expiry callback function
base
pointer to the timer base (per cpu and per clock)
state
state information (See bit values above)
start_pid
timer statistics field to store the pid of the task which started the timer
start_site
timer statistics field to store the site where the timer was started
start_comm[16]
timer statistics field to store the name of the process which started the timer
DESCRIPTION
The hrtimer structure must be initialized by hrtimer_init
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 STRUCT HRTIMER(9)
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