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authorLaurent Vivier <Laurent.Vivier@bull.net>2007-10-15 17:00:19 +0200
committerIngo Molnar <mingo@elte.hu>2007-10-15 17:00:19 +0200
commit9ac52315d4cf5f561f36dabaf0720c00d3553162 (patch)
treeafe7284f34a65d2540fcb2a9b764834f9d790fa7
parent5e84cfde51cf303d368fcb48f22059f37b3872de (diff)
downloadop-kernel-dev-9ac52315d4cf5f561f36dabaf0720c00d3553162.zip
op-kernel-dev-9ac52315d4cf5f561f36dabaf0720c00d3553162.tar.gz
sched: guest CPU accounting: add guest-CPU /proc/<pid>/stat fields
like for cpustat, introduce the "gtime" (guest time of the task) and "cgtime" (guest time of the task children) fields for the tasks. Modify signal_struct and task_struct. Modify /proc/<pid>/stat to display these new fields. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Acked-by: Avi Kivity <avi@qumranet.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--fs/proc/array.c17
-rw-r--r--include/linux/sched.h3
-rw-r--r--kernel/exit.c6
-rw-r--r--kernel/fork.c3
4 files changed, 27 insertions, 2 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index ee4814d..27b59f5 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -370,6 +370,11 @@ static cputime_t task_stime(struct task_struct *p)
}
#endif
+static cputime_t task_gtime(struct task_struct *p)
+{
+ return p->gtime;
+}
+
static int do_task_stat(struct task_struct *task, char *buffer, int whole)
{
unsigned long vsize, eip, esp, wchan = ~0UL;
@@ -385,6 +390,7 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
unsigned long cmin_flt = 0, cmaj_flt = 0;
unsigned long min_flt = 0, maj_flt = 0;
cputime_t cutime, cstime, utime, stime;
+ cputime_t cgtime, gtime;
unsigned long rsslim = 0;
char tcomm[sizeof(task->comm)];
unsigned long flags;
@@ -403,6 +409,7 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
sigemptyset(&sigign);
sigemptyset(&sigcatch);
cutime = cstime = utime = stime = cputime_zero;
+ cgtime = gtime = cputime_zero;
rcu_read_lock();
if (lock_task_sighand(task, &flags)) {
@@ -420,6 +427,7 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
cmaj_flt = sig->cmaj_flt;
cutime = sig->cutime;
cstime = sig->cstime;
+ cgtime = sig->cgtime;
rsslim = sig->rlim[RLIMIT_RSS].rlim_cur;
/* add up live thread stats at the group level */
@@ -430,6 +438,7 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
maj_flt += t->maj_flt;
utime = cputime_add(utime, task_utime(t));
stime = cputime_add(stime, task_stime(t));
+ gtime = cputime_add(gtime, task_gtime(t));
t = next_thread(t);
} while (t != task);
@@ -437,6 +446,7 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
maj_flt += sig->maj_flt;
utime = cputime_add(utime, sig->utime);
stime = cputime_add(stime, sig->stime);
+ gtime += cputime_add(gtime, sig->gtime);
}
sid = signal_session(sig);
@@ -454,6 +464,7 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
maj_flt = task->maj_flt;
utime = task_utime(task);
stime = task_stime(task);
+ gtime = task_gtime(task);
}
/* scale priority and nice values from timeslices to -20..20 */
@@ -471,7 +482,7 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
res = sprintf(buffer, "%d (%s) %c %d %d %d %d %d %u %lu \
%lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
-%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu\n",
+%lu %lu %lu %lu %lu %lu %lu %lu %d %d %u %u %llu %lu %ld\n",
task->pid,
tcomm,
state,
@@ -516,7 +527,9 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
task_cpu(task),
task->rt_priority,
task->policy,
- (unsigned long long)delayacct_blkio_ticks(task));
+ (unsigned long long)delayacct_blkio_ticks(task),
+ cputime_to_clock_t(gtime),
+ cputime_to_clock_t(cgtime));
if (mm)
mmput(mm);
return res;
diff --git a/include/linux/sched.h b/include/linux/sched.h
index 3a6e05e..fefce22 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -517,6 +517,8 @@ struct signal_struct {
* in __exit_signal, except for the group leader.
*/
cputime_t utime, stime, cutime, cstime;
+ cputime_t gtime;
+ cputime_t cgtime;
unsigned long nvcsw, nivcsw, cnvcsw, cnivcsw;
unsigned long min_flt, maj_flt, cmin_flt, cmaj_flt;
unsigned long inblock, oublock, cinblock, coublock;
@@ -1048,6 +1050,7 @@ struct task_struct {
unsigned int rt_priority;
cputime_t utime, stime;
+ cputime_t gtime;
unsigned long nvcsw, nivcsw; /* context switch counts */
struct timespec start_time; /* monotonic time */
struct timespec real_start_time; /* boot based time */
diff --git a/kernel/exit.c b/kernel/exit.c
index 993369e..7f7959d 100644
--- a/kernel/exit.c
+++ b/kernel/exit.c
@@ -111,6 +111,7 @@ static void __exit_signal(struct task_struct *tsk)
*/
sig->utime = cputime_add(sig->utime, tsk->utime);
sig->stime = cputime_add(sig->stime, tsk->stime);
+ sig->gtime = cputime_add(sig->gtime, tsk->gtime);
sig->min_flt += tsk->min_flt;
sig->maj_flt += tsk->maj_flt;
sig->nvcsw += tsk->nvcsw;
@@ -1242,6 +1243,11 @@ static int wait_task_zombie(struct task_struct *p, int noreap,
cputime_add(p->stime,
cputime_add(sig->stime,
sig->cstime)));
+ psig->cgtime =
+ cputime_add(psig->cgtime,
+ cputime_add(p->gtime,
+ cputime_add(sig->gtime,
+ sig->cgtime)));
psig->cmin_flt +=
p->min_flt + sig->min_flt + sig->cmin_flt;
psig->cmaj_flt +=
diff --git a/kernel/fork.c b/kernel/fork.c
index 5e67f90..3fc3c13 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -877,6 +877,8 @@ static inline int copy_signal(unsigned long clone_flags, struct task_struct * ts
sig->tty_old_pgrp = NULL;
sig->utime = sig->stime = sig->cutime = sig->cstime = cputime_zero;
+ sig->gtime = cputime_zero;
+ sig->cgtime = cputime_zero;
sig->nvcsw = sig->nivcsw = sig->cnvcsw = sig->cnivcsw = 0;
sig->min_flt = sig->maj_flt = sig->cmin_flt = sig->cmaj_flt = 0;
sig->inblock = sig->oublock = sig->cinblock = sig->coublock = 0;
@@ -1045,6 +1047,7 @@ static struct task_struct *copy_process(unsigned long clone_flags,
p->utime = cputime_zero;
p->stime = cputime_zero;
+ p->gtime = cputime_zero;
#ifdef CONFIG_TASK_XACCT
p->rchar = 0; /* I/O counter: bytes read */
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