From: Yuyang Du <yuyang.du@intel.com>
To: mingo@kernel.org, peterz@infradead.org, linux-kernel@vger.kernel.org
Cc: pjt@google.com, bsegall@google.com, morten.rasmussen@arm.com,
vincent.guittot@linaro.org, dietmar.eggemann@arm.com,
Yuyang Du <yuyang.du@intel.com>
Subject: [PATCH 4/4] sched/fair: Rename scale_load() and scale_load_down()
Date: Mon, 5 Oct 2015 01:56:59 +0800 [thread overview]
Message-ID: <1443981419-16665-5-git-send-email-yuyang.du@intel.com> (raw)
In-Reply-To: <1443981419-16665-1-git-send-email-yuyang.du@intel.com>
Rename scale_load() and scale_load_down() to user_to_kernel_load()
and kernel_to_user_load() respectively, to allow the names to bear
what they are really about.
Signed-off-by: Yuyang Du <yuyang.du@intel.com>
---
kernel/sched/core.c | 8 ++++----
kernel/sched/fair.c | 7 ++++---
kernel/sched/sched.h | 15 ++++++++-------
3 files changed, 16 insertions(+), 14 deletions(-)
diff --git a/kernel/sched/core.c b/kernel/sched/core.c
index ffe7b7e..1359871 100644
--- a/kernel/sched/core.c
+++ b/kernel/sched/core.c
@@ -818,12 +818,12 @@ static void set_load_weight(struct task_struct *p)
* SCHED_IDLE tasks get minimal weight:
*/
if (idle_policy(p->policy)) {
- load->weight = scale_load(WEIGHT_IDLEPRIO);
+ load->weight = user_to_kernel_load(WEIGHT_IDLEPRIO);
load->inv_weight = WMULT_IDLEPRIO;
return;
}
- load->weight = scale_load(prio_to_weight[prio]);
+ load->weight = user_to_kernel_load(prio_to_weight[prio]);
load->inv_weight = prio_to_wmult[prio];
}
@@ -8199,7 +8199,7 @@ static void cpu_cgroup_exit(struct cgroup_subsys_state *css,
static int cpu_shares_write_u64(struct cgroup_subsys_state *css,
struct cftype *cftype, u64 shareval)
{
- return sched_group_set_shares(css_tg(css), scale_load(shareval));
+ return sched_group_set_shares(css_tg(css), user_to_kernel_load(shareval));
}
static u64 cpu_shares_read_u64(struct cgroup_subsys_state *css,
@@ -8207,7 +8207,7 @@ static u64 cpu_shares_read_u64(struct cgroup_subsys_state *css,
{
struct task_group *tg = css_tg(css);
- return (u64) scale_load_down(tg->shares);
+ return (u64) kernel_to_user_load(tg->shares);
}
#ifdef CONFIG_CFS_BANDWIDTH
diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
index 807d960..72db21e 100644
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -189,7 +189,7 @@ static void __update_inv_weight(struct load_weight *lw)
if (likely(lw->inv_weight))
return;
- w = scale_load_down(lw->weight);
+ w = kernel_to_user_load(lw->weight);
if (BITS_PER_LONG > 32 && unlikely(w >= WMULT_CONST))
lw->inv_weight = 1;
@@ -213,7 +213,7 @@ static void __update_inv_weight(struct load_weight *lw)
*/
static u64 __calc_delta(u64 delta_exec, unsigned long weight, struct load_weight *lw)
{
- u64 fact = scale_load_down(weight);
+ u64 fact = kernel_to_user_load(weight);
int shift = WMULT_SHIFT;
__update_inv_weight(lw);
@@ -8205,7 +8205,8 @@ int sched_group_set_shares(struct task_group *tg, unsigned long shares)
if (!tg->se[0])
return -EINVAL;
- shares = clamp(shares, scale_load(MIN_SHARES), scale_load(MAX_SHARES));
+ shares = clamp(shares, user_to_kernel_load(MIN_SHARES),
+ user_to_kernel_load(MAX_SHARES));
mutex_lock(&shares_mutex);
if (tg->shares == shares)
diff --git a/kernel/sched/sched.h b/kernel/sched/sched.h
index 3d03956..0a1e972 100644
--- a/kernel/sched/sched.h
+++ b/kernel/sched/sched.h
@@ -54,21 +54,22 @@ static inline void update_cpu_load_active(struct rq *this_rq) { }
*/
#if 0 /* BITS_PER_LONG > 32 -- currently broken: it increases power usage under light load */
# define NICE_0_LOAD_SHIFT (SCHED_RESOLUTION_SHIFT + SCHED_RESOLUTION_SHIFT)
-# define scale_load(w) ((w) << SCHED_RESOLUTION_SHIFT)
-# define scale_load_down(w) ((w) >> SCHED_RESOLUTION_SHIFT)
+# define user_to_kernel_load(w) ((w) << SCHED_RESOLUTION_SHIFT)
+# define kernel_to_user_load(w) ((w) >> SCHED_RESOLUTION_SHIFT)
#else
# define NICE_0_LOAD_SHIFT (SCHED_RESOLUTION_SHIFT)
-# define scale_load(w) (w)
-# define scale_load_down(w) (w)
+# define user_to_kernel_load(w) (w)
+# define kernel_to_user_load(w) (w)
#endif
/*
* Task weight (visible to user) and its load (invisible to user) have
* independent resolution, but they should be well calibrated. We use
- * scale_load() and scale_load_down(w) to convert between them. The
- * following must be true:
+ * user_to_kernel_load() and kernel_to_user_load(w) to convert between
+ * them. The following must be true:
*
- * scale_load(prio_to_weight[USER_PRIO(NICE_TO_PRIO(0))]) == NICE_0_LOAD
+ * user_to_kernel_load(prio_to_weight[USER_PRIO(NICE_TO_PRIO(0))]) == NICE_0_LOAD
+ * kernel_to_user_load(NICE_0_LOAD) == prio_to_weight[USER_PRIO(NICE_TO_PRIO(0))]
*
*/
#define NICE_0_LOAD (1L << NICE_0_LOAD_SHIFT)
--
2.1.4
prev parent reply other threads:[~2015-10-05 1:46 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-04 17:56 [PATCH 0/4] sched/fair: Clean up sched metric definitions Yuyang Du
2015-10-04 17:56 ` [PATCH 1/4] sched/fair: Generalize the load/util averages resolution definition Yuyang Du
2015-10-05 7:04 ` Ingo Molnar
2015-10-06 8:00 ` Yuyang Du
2015-10-09 23:04 ` Yuyang Du
2015-10-05 10:52 ` Peter Zijlstra
2015-10-04 17:56 ` [PATCH 2/4] sched/fair: Remove SCHED_LOAD_SHIFT and SCHED_LOAD_SCALE Yuyang Du
2015-10-06 9:29 ` Vincent Guittot
2015-10-04 17:56 ` [PATCH 3/4] sched/fair: Remove scale_load_down() for load_avg Yuyang Du
2015-10-04 17:56 ` Yuyang Du [this message]
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