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Subject[PATCH v3 -tip] sched: Clean unused fields from struct rq
Since they are used on in statistics and are always set to zero, the following
fields from struct rq have been removed: yld_exp_empty, yld_act_empty and
yld_both_empty.

Both Sched Debug and SCHEDSTAT_VERSION versions has also been incremented since
ABIs have been changed.

Signed-off-by: Luis Henriques <henrix@sapo.pt>
---
kernel/sched.c | 3 ---
kernel/sched_debug.c | 5 +----
kernel/sched_stats.h | 7 +++----
3 files changed, 4 insertions(+), 11 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 8a579e2..4469034 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -646,9 +646,6 @@ struct rq {
/* could above be rq->cfs_rq.exec_clock + rq->rt_rq.rt_runtime ? */

/* sys_sched_yield() stats */
- unsigned int yld_exp_empty;
- unsigned int yld_act_empty;
- unsigned int yld_both_empty;
unsigned int yld_count;

/* schedule() stats */
diff --git a/kernel/sched_debug.c b/kernel/sched_debug.c
index 4daebff..467ca72 100644
--- a/kernel/sched_debug.c
+++ b/kernel/sched_debug.c
@@ -286,9 +286,6 @@ static void print_cpu(struct seq_file *m, int cpu)
#ifdef CONFIG_SCHEDSTATS
#define P(n) SEQ_printf(m, " .%-30s: %d\n", #n, rq->n);

- P(yld_exp_empty);
- P(yld_act_empty);
- P(yld_both_empty);
P(yld_count);

P(sched_switch);
@@ -313,7 +310,7 @@ static int sched_debug_show(struct seq_file *m, void *v)
u64 now = ktime_to_ns(ktime_get());
int cpu;

- SEQ_printf(m, "Sched Debug Version: v0.08, %s %.*s\n",
+ SEQ_printf(m, "Sched Debug Version: v0.09, %s %.*s\n",
init_utsname()->release,
(int)strcspn(init_utsname()->version, " "),
init_utsname()->version);
diff --git a/kernel/sched_stats.h b/kernel/sched_stats.h
index a8f93dd..32d2bd4 100644
--- a/kernel/sched_stats.h
+++ b/kernel/sched_stats.h
@@ -4,7 +4,7 @@
* bump this up when changing the output format or the meaning of an existing
* format, so that tools can adapt (or abort)
*/
-#define SCHEDSTAT_VERSION 14
+#define SCHEDSTAT_VERSION 15

static int show_schedstat(struct seq_file *seq, void *v)
{
@@ -26,9 +26,8 @@ static int show_schedstat(struct seq_file *seq, void *v)

/* runqueue-specific stats */
seq_printf(seq,
- "cpu%d %u %u %u %u %u %u %u %u %u %llu %llu %lu",
- cpu, rq->yld_both_empty,
- rq->yld_act_empty, rq->yld_exp_empty, rq->yld_count,
+ "cpu%d %u %u %u %u %u %u %llu %llu %lu",
+ cpu, rq->yld_count,
rq->sched_switch, rq->sched_count, rq->sched_goidle,
rq->ttwu_count, rq->ttwu_local,
rq->rq_cpu_time,
--
1.6.2

--
Luis Henriques


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