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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-23 21:38:39 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-08-23 21:38:39 -0700
commitd0797b39dcd70fe366b114515cb898ac6fecdd99 (patch)
tree1716f05d10cfe5a52646eda23275a5d773054e81 /fs
parent0542170dec523d50e8bed5515e2f7314e738c8d8 (diff)
parent505c0efd58031923ae01deac16d896607cafa70e (diff)
downloadlinux-linaro-d0797b39dcd70fe366b114515cb898ac6fecdd99.tar.gz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched
* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched: sched: tweak the sched_runtime_limit tunable sched: skip updating rq's next_balance under null SD sched: fix broken SMT/MC optimizations sched: accounting regression since rc1 sched: fix sysctl directory permissions sched: sched_clock_idle_[sleep|wakeup]_event()
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/array.c44
1 files changed, 29 insertions, 15 deletions
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 965625a0977..ee4814dd98f 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -320,7 +320,21 @@ int proc_pid_status(struct task_struct *task, char *buffer)
return buffer - orig;
}
-static clock_t task_utime(struct task_struct *p)
+/*
+ * Use precise platform statistics if available:
+ */
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING
+static cputime_t task_utime(struct task_struct *p)
+{
+ return p->utime;
+}
+
+static cputime_t task_stime(struct task_struct *p)
+{
+ return p->stime;
+}
+#else
+static cputime_t task_utime(struct task_struct *p)
{
clock_t utime = cputime_to_clock_t(p->utime),
total = utime + cputime_to_clock_t(p->stime);
@@ -337,10 +351,10 @@ static clock_t task_utime(struct task_struct *p)
}
utime = (clock_t)temp;
- return utime;
+ return clock_t_to_cputime(utime);
}
-static clock_t task_stime(struct task_struct *p)
+static cputime_t task_stime(struct task_struct *p)
{
clock_t stime;
@@ -349,10 +363,12 @@ static clock_t task_stime(struct task_struct *p)
* the total, to make sure the total observed by userspace
* grows monotonically - apps rely on that):
*/
- stime = nsec_to_clock_t(p->se.sum_exec_runtime) - task_utime(p);
+ stime = nsec_to_clock_t(p->se.sum_exec_runtime) -
+ cputime_to_clock_t(task_utime(p));
- return stime;
+ return clock_t_to_cputime(stime);
}
+#endif
static int do_task_stat(struct task_struct *task, char *buffer, int whole)
{
@@ -368,8 +384,7 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
unsigned long long start_time;
unsigned long cmin_flt = 0, cmaj_flt = 0;
unsigned long min_flt = 0, maj_flt = 0;
- cputime_t cutime, cstime;
- clock_t utime, stime;
+ cputime_t cutime, cstime, utime, stime;
unsigned long rsslim = 0;
char tcomm[sizeof(task->comm)];
unsigned long flags;
@@ -387,8 +402,7 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
sigemptyset(&sigign);
sigemptyset(&sigcatch);
- cutime = cstime = cputime_zero;
- utime = stime = 0;
+ cutime = cstime = utime = stime = cputime_zero;
rcu_read_lock();
if (lock_task_sighand(task, &flags)) {
@@ -414,15 +428,15 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
do {
min_flt += t->min_flt;
maj_flt += t->maj_flt;
- utime += task_utime(t);
- stime += task_stime(t);
+ utime = cputime_add(utime, task_utime(t));
+ stime = cputime_add(stime, task_stime(t));
t = next_thread(t);
} while (t != task);
min_flt += sig->min_flt;
maj_flt += sig->maj_flt;
- utime += cputime_to_clock_t(sig->utime);
- stime += cputime_to_clock_t(sig->stime);
+ utime = cputime_add(utime, sig->utime);
+ stime = cputime_add(stime, sig->stime);
}
sid = signal_session(sig);
@@ -471,8 +485,8 @@ static int do_task_stat(struct task_struct *task, char *buffer, int whole)
cmin_flt,
maj_flt,
cmaj_flt,
- utime,
- stime,
+ cputime_to_clock_t(utime),
+ cputime_to_clock_t(stime),
cputime_to_clock_t(cutime),
cputime_to_clock_t(cstime),
priority,