[PATCH] sched: reduce debug code

move the rest of the debugging/instrumentation code to under
CONFIG_SCHEDSTATS too. This reduces code size and speeds code up:

    text    data     bss     dec     hex filename
   33044    4122      28   37194    914a sched.o.before
   32708    4122      28   36858    8ffa sched.o.after

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 18 insertions, 10 deletions

diff --git a/kernel/sched.c b/kernel/sched.c
index a9d374061a46..72bb9483d949 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -983,18 +983,21 @@ void set_task_cpu(struct task_struct *p, unsigned int new_cpu)
         u64 clock_offset, fair_clock_offset;
 
         clock_offset = old_rq->clock - new_rq->clock;
-        fair_clock_offset = old_rq->cfs.fair_clock -
-                                                 new_rq->cfs.fair_clock;
-        if (p->se.wait_start)
-                p->se.wait_start -= clock_offset;
+        fair_clock_offset = old_rq->cfs.fair_clock - new_rq->cfs.fair_clock;
+
         if (p->se.wait_start_fair)
                 p->se.wait_start_fair -= fair_clock_offset;
+        if (p->se.sleep_start_fair)
+                p->se.sleep_start_fair -= fair_clock_offset;
+
+#ifdef CONFIG_SCHEDSTATS
+        if (p->se.wait_start)
+                p->se.wait_start -= clock_offset;
         if (p->se.sleep_start)
                 p->se.sleep_start -= clock_offset;
         if (p->se.block_start)
                 p->se.block_start -= clock_offset;
-        if (p->se.sleep_start_fair)
-                p->se.sleep_start_fair -= fair_clock_offset;
+#endif
 
         __set_task_cpu(p, new_cpu);
 }
@@ -1555,17 +1558,19 @@ int fastcall wake_up_state(struct task_struct *p, unsigned int state)
 static void __sched_fork(struct task_struct *p)
 {
         p->se.wait_start_fair           = 0;
-        p->se.wait_start                = 0;
         p->se.exec_start                = 0;
         p->se.sum_exec_runtime          = 0;
         p->se.delta_exec                = 0;
         p->se.delta_fair_run            = 0;
         p->se.delta_fair_sleep          = 0;
         p->se.wait_runtime              = 0;
+        p->se.sleep_start_fair          = 0;
+
+#ifdef CONFIG_SCHEDSTATS
+        p->se.wait_start                = 0;
         p->se.sum_wait_runtime          = 0;
         p->se.sum_sleep_runtime         = 0;
         p->se.sleep_start               = 0;
-        p->se.sleep_start_fair          = 0;
         p->se.block_start               = 0;
         p->se.sleep_max                 = 0;
         p->se.block_max                 = 0;
@@ -1573,6 +1578,7 @@ static void __sched_fork(struct task_struct *p)
         p->se.wait_max                  = 0;
         p->se.wait_runtime_overruns     = 0;
         p->se.wait_runtime_underruns    = 0;
+#endif
 
         INIT_LIST_HEAD(&p->run_list);
         p->se.on_rq = 0;
@@ -6579,12 +6585,14 @@ void normalize_rt_tasks(void)
         do_each_thread(g, p) {
                 p->se.fair_key                  = 0;
                 p->se.wait_runtime              = 0;
+                p->se.exec_start                = 0;
                 p->se.wait_start_fair           = 0;
+                p->se.sleep_start_fair          = 0;
+#ifdef CONFIG_SCHEDSTATS
                 p->se.wait_start                = 0;
-                p->se.exec_start                = 0;
                 p->se.sleep_start               = 0;
-                p->se.sleep_start_fair          = 0;
                 p->se.block_start               = 0;
+#endif
                 task_rq(p)->cfs.fair_clock      = 0;
                 task_rq(p)->clock               = 0;