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Date: Thu, 23 Mar 2017 19:32:37 +0900
From: Byungchul Park <byungchul.park@....com>
To: <peterz@...radead.org>, <mingo@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <juri.lelli@...il.com>,
<rostedt@...dmis.org>, <kernel-team@....com>
Subject: [PATCH 2/8] sched/deadline: Re-define parameters of cpudl heapify functions
If you don't like this clean-up patch, please let me know. If so, I will
exclude this patch from next spin.
Thank you,
Byungchul
-----8<-----
>From b303ccf6b64064ce22aa17d16a012dcc7904ad32 Mon Sep 17 00:00:00 2001
From: Byungchul Park <byungchul.park@....com>
Date: Wed, 22 Mar 2017 14:07:22 +0900
Subject: [PATCH 2/8] sched/deadline: Re-define parameters of cpudl heapify
functions
Currently whole 'struct cpudl' is used as a parameter on heapifying.
However, only elements and size are needed on the work. So change the
parameters.
Signed-off-by: Byungchul Park <byungchul.park@....com>
---
kernel/sched/cpudeadline.c | 63 ++++++++++++++++++++++------------------------
1 file changed, 30 insertions(+), 33 deletions(-)
diff --git a/kernel/sched/cpudeadline.c b/kernel/sched/cpudeadline.c
index fba235c..7dd6d9d 100644
--- a/kernel/sched/cpudeadline.c
+++ b/kernel/sched/cpudeadline.c
@@ -31,14 +31,14 @@ static inline int right_child(int i)
return (i << 1) + 2;
}
-static void cpudl_heapify_down(struct cpudl *cp, int idx)
+static void cpudl_heapify_down(struct cpudl_item *e, int size, int idx)
{
int l, r, largest;
- int orig_cpu = cp->elements[idx].cpu;
- u64 orig_dl = cp->elements[idx].dl;
+ int orig_cpu = e[idx].cpu;
+ u64 orig_dl = e[idx].dl;
- if (left_child(idx) >= cp->size)
+ if (left_child(idx) >= size)
return;
/* adapted from lib/prio_heap.c */
@@ -49,63 +49,60 @@ static void cpudl_heapify_down(struct cpudl *cp, int idx)
largest = idx;
largest_dl = orig_dl;
- if ((l < cp->size) && dl_time_before(orig_dl,
- cp->elements[l].dl)) {
+ if ((l < size) && dl_time_before(orig_dl, e[l].dl)) {
largest = l;
- largest_dl = cp->elements[l].dl;
+ largest_dl = e[l].dl;
}
- if ((r < cp->size) && dl_time_before(largest_dl,
- cp->elements[r].dl))
+ if ((r < size) && dl_time_before(largest_dl, e[r].dl))
largest = r;
if (largest == idx)
break;
/* pull largest child onto idx */
- cp->elements[idx].cpu = cp->elements[largest].cpu;
- cp->elements[idx].dl = cp->elements[largest].dl;
- cp->elements[cp->elements[idx].cpu].idx = idx;
+ e[idx].cpu = e[largest].cpu;
+ e[idx].dl = e[largest].dl;
+ e[e[idx].cpu].idx = idx;
idx = largest;
}
/* actual push down of saved original values orig_* */
- cp->elements[idx].cpu = orig_cpu;
- cp->elements[idx].dl = orig_dl;
- cp->elements[cp->elements[idx].cpu].idx = idx;
+ e[idx].cpu = orig_cpu;
+ e[idx].dl = orig_dl;
+ e[e[idx].cpu].idx = idx;
}
-static void cpudl_heapify_up(struct cpudl *cp, int idx)
+static void cpudl_heapify_up(struct cpudl_item *e, int size, int idx)
{
int p;
- int orig_cpu = cp->elements[idx].cpu;
- u64 orig_dl = cp->elements[idx].dl;
+ int orig_cpu = e[idx].cpu;
+ u64 orig_dl = e[idx].dl;
if (idx == 0)
return;
do {
p = parent(idx);
- if (dl_time_before(orig_dl, cp->elements[p].dl))
+ if (dl_time_before(orig_dl, e[p].dl))
break;
/* pull parent onto idx */
- cp->elements[idx].cpu = cp->elements[p].cpu;
- cp->elements[idx].dl = cp->elements[p].dl;
- cp->elements[cp->elements[idx].cpu].idx = idx;
+ e[idx].cpu = e[p].cpu;
+ e[idx].dl = e[p].dl;
+ e[e[idx].cpu].idx = idx;
idx = p;
} while (idx != 0);
/* actual push up of saved original values orig_* */
- cp->elements[idx].cpu = orig_cpu;
- cp->elements[idx].dl = orig_dl;
- cp->elements[cp->elements[idx].cpu].idx = idx;
+ e[idx].cpu = orig_cpu;
+ e[idx].dl = orig_dl;
+ e[e[idx].cpu].idx = idx;
}
-static void cpudl_heapify(struct cpudl *cp, int idx)
+static void cpudl_heapify(struct cpudl_item *e, int size, int idx)
{
- if (idx > 0 && dl_time_before(cp->elements[parent(idx)].dl,
- cp->elements[idx].dl))
- cpudl_heapify_up(cp, idx);
+ if (idx > 0 && dl_time_before(e[parent(idx)].dl, e[idx].dl))
+ cpudl_heapify_up(e, size, idx);
else
- cpudl_heapify_down(cp, idx);
+ cpudl_heapify_down(e, size, idx);
}
static inline int cpudl_maximum(struct cpudl *cp)
@@ -176,7 +173,7 @@ void cpudl_clear(struct cpudl *cp, int cpu)
cp->size--;
cp->elements[new_cpu].idx = old_idx;
cp->elements[cpu].idx = IDX_INVALID;
- cpudl_heapify(cp, old_idx);
+ cpudl_heapify(cp->elements, cp->size, old_idx);
cpumask_set_cpu(cpu, cp->free_cpus);
}
@@ -208,11 +205,11 @@ void cpudl_set(struct cpudl *cp, int cpu, u64 dl)
cp->elements[new_idx].dl = dl;
cp->elements[new_idx].cpu = cpu;
cp->elements[cpu].idx = new_idx;
- cpudl_heapify_up(cp, new_idx);
+ cpudl_heapify_up(cp->elements, cp->size, new_idx);
cpumask_clear_cpu(cpu, cp->free_cpus);
} else {
cp->elements[old_idx].dl = dl;
- cpudl_heapify(cp, old_idx);
+ cpudl_heapify(cp->elements, cp->size, old_idx);
}
raw_spin_unlock_irqrestore(&cp->lock, flags);
--
1.9.1
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