* [PATCH 0/2] sched: task group weight interface
@ 2008-12-10 19:40 Peter Zijlstra
2008-12-10 19:40 ` [PATCH 1/2] sched: tg->weight Peter Zijlstra
` (3 more replies)
0 siblings, 4 replies; 6+ messages in thread
From: Peter Zijlstra @ 2008-12-10 19:40 UTC (permalink / raw)
To: mingo, dhaval, vatsa, cfriesen; +Cc: linux-kernel, Peter Zijlstra
Hi,
Dhaval poked me that he (and others) didn't like the weight interface we
currently have for task groups. I concurr and dusted off these old patches.
--
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 1/2] sched: tg->weight
2008-12-10 19:40 [PATCH 0/2] sched: task group weight interface Peter Zijlstra
@ 2008-12-10 19:40 ` Peter Zijlstra
2008-12-10 19:40 ` [PATCH 2/2] sched: group nice Peter Zijlstra
` (2 subsequent siblings)
3 siblings, 0 replies; 6+ messages in thread
From: Peter Zijlstra @ 2008-12-10 19:40 UTC (permalink / raw)
To: mingo, dhaval, vatsa, cfriesen; +Cc: linux-kernel, Peter Zijlstra
[-- Attachment #1: sched-tg_weight.patch --]
[-- Type: text/plain, Size: 7038 bytes --]
While going through the whole group thing again, I realized tg->shares ought
to be called tg->weight, as its the total group weight, and not a share of
the group weight.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
include/linux/sched.h | 4 ++--
kernel/sched.c | 49 +++++++++++++++++++++++++++----------------------
kernel/sched_fair.c | 2 +-
kernel/user.c | 4 ++--
4 files changed, 32 insertions(+), 27 deletions(-)
Index: linux-2.6/kernel/sched.c
===================================================================
--- linux-2.6.orig/kernel/sched.c
+++ linux-2.6/kernel/sched.c
@@ -275,7 +275,7 @@ struct task_group {
struct sched_entity **se;
/* runqueue "owned" by this group on each cpu */
struct cfs_rq **cfs_rq;
- unsigned long shares;
+ unsigned long weight;
#endif
#ifdef CONFIG_RT_GROUP_SCHED
@@ -445,7 +445,7 @@ struct cfs_rq {
unsigned long h_load;
/*
- * this cpu's part of tg->shares
+ * this cpu's part of tg->weight
*/
unsigned long shares;
@@ -1465,7 +1465,7 @@ static void __set_se_shares(struct sched
* Calculate and set the cpu's group shares.
*/
static void
-update_group_shares_cpu(struct task_group *tg, int cpu,
+update_group_weight_cpu(struct task_group *tg, int cpu,
unsigned long sd_shares, unsigned long sd_rq_weight)
{
unsigned long shares;
@@ -1525,14 +1525,14 @@ static int tg_shares_up(struct task_grou
shares += tg->cfs_rq[i]->shares;
}
- if ((!shares && rq_weight) || shares > tg->shares)
- shares = tg->shares;
+ if ((!shares && rq_weight) || shares > tg->weight)
+ shares = tg->weight;
if (!sd->parent || !(sd->parent->flags & SD_LOAD_BALANCE))
- shares = tg->shares;
+ shares = tg->weight;
for_each_cpu(i, sched_domain_span(sd))
- update_group_shares_cpu(tg, i, shares, rq_weight);
+ update_group_weight_cpu(tg, i, shares, rq_weight);
return 0;
}
@@ -8112,7 +8112,7 @@ static void init_tg_cfs_entry(struct tas
se->cfs_rq = parent->my_q;
se->my_q = cfs_rq;
- se->load.weight = tg->shares;
+ se->load.weight = tg->weight;
se->load.inv_weight = 0;
se->parent = parent;
}
@@ -8237,7 +8237,7 @@ void __init sched_init(void)
init_cfs_rq(&rq->cfs, rq);
init_rt_rq(&rq->rt, rq);
#ifdef CONFIG_FAIR_GROUP_SCHED
- init_task_group.shares = init_task_group_load;
+ init_task_group.weight = init_task_group_load;
INIT_LIST_HEAD(&rq->leaf_cfs_rq_list);
#ifdef CONFIG_CGROUP_SCHED
/*
@@ -8261,7 +8261,7 @@ void __init sched_init(void)
*/
init_tg_cfs_entry(&init_task_group, &rq->cfs, NULL, i, 1, NULL);
#elif defined CONFIG_USER_SCHED
- root_task_group.shares = NICE_0_LOAD;
+ root_task_group.weight = NICE_0_LOAD;
init_tg_cfs_entry(&root_task_group, &rq->cfs, NULL, i, 0, NULL);
/*
* In case of task-groups formed thr' the user id of tasks,
@@ -8524,7 +8524,7 @@ int alloc_fair_sched_group(struct task_g
if (!tg->se)
goto err;
- tg->shares = NICE_0_LOAD;
+ tg->weight = NICE_0_LOAD;
for_each_possible_cpu(i) {
rq = cpu_rq(i);
@@ -8807,7 +8807,7 @@ static void set_se_shares(struct sched_e
static DEFINE_MUTEX(shares_mutex);
-int sched_group_set_shares(struct task_group *tg, unsigned long shares)
+int sched_group_set_weight(struct task_group *tg, unsigned long shares)
{
int i;
unsigned long flags;
@@ -8824,7 +8824,7 @@ int sched_group_set_shares(struct task_g
shares = MAX_SHARES;
mutex_lock(&shares_mutex);
- if (tg->shares == shares)
+ if (tg->weight == shares)
goto done;
spin_lock_irqsave(&task_group_lock, flags);
@@ -8840,7 +8840,7 @@ int sched_group_set_shares(struct task_g
* Now we are free to modify the group's share on each cpu
* w/o tripping rebalance_share or load_balance_fair.
*/
- tg->shares = shares;
+ tg->weight = shares;
for_each_possible_cpu(i) {
/*
* force a rebalance
@@ -8863,9 +8863,9 @@ done:
return 0;
}
-unsigned long sched_group_shares(struct task_group *tg)
+unsigned long sched_group_weight(struct task_group *tg)
{
- return tg->shares;
+ return tg->weight;
}
#endif
@@ -9183,17 +9183,17 @@ cpu_cgroup_attach(struct cgroup_subsys *
}
#ifdef CONFIG_FAIR_GROUP_SCHED
-static int cpu_shares_write_u64(struct cgroup *cgrp, struct cftype *cftype,
+static int cpu_weight_write_u64(struct cgroup *cgrp, struct cftype *cftype,
u64 shareval)
{
- return sched_group_set_shares(cgroup_tg(cgrp), shareval);
+ return sched_group_set_weight(cgroup_tg(cgrp), shareval);
}
-static u64 cpu_shares_read_u64(struct cgroup *cgrp, struct cftype *cft)
+static u64 cpu_weight_read_u64(struct cgroup *cgrp, struct cftype *cft)
{
struct task_group *tg = cgroup_tg(cgrp);
- return (u64) tg->shares;
+ return (u64) tg->weight;
}
#endif /* CONFIG_FAIR_GROUP_SCHED */
@@ -9225,8 +9225,13 @@ static struct cftype cpu_files[] = {
#ifdef CONFIG_FAIR_GROUP_SCHED
{
.name = "shares",
- .read_u64 = cpu_shares_read_u64,
- .write_u64 = cpu_shares_write_u64,
+ .read_u64 = cpu_weight_read_u64,
+ .write_u64 = cpu_weight_write_u64,
+ },
+ {
+ .name = "weight",
+ .read_u64 = cpu_weight_read_u64,
+ .write_u64 = cpu_weight_write_u64,
},
#endif
#ifdef CONFIG_RT_GROUP_SCHED
Index: linux-2.6/kernel/sched_fair.c
===================================================================
--- linux-2.6.orig/kernel/sched_fair.c
+++ linux-2.6/kernel/sched_fair.c
@@ -1117,7 +1117,7 @@ static long effective_load(struct task_g
wl += more_w;
wg += more_w;
- S = se->my_q->tg->shares;
+ S = se->my_q->tg->weight;
s = se->my_q->shares;
rw = se->my_q->rq_weight;
Index: linux-2.6/include/linux/sched.h
===================================================================
--- linux-2.6.orig/include/linux/sched.h
+++ linux-2.6/include/linux/sched.h
@@ -2282,8 +2282,8 @@ extern struct task_group *sched_create_g
extern void sched_destroy_group(struct task_group *tg);
extern void sched_move_task(struct task_struct *tsk);
#ifdef CONFIG_FAIR_GROUP_SCHED
-extern int sched_group_set_shares(struct task_group *tg, unsigned long shares);
-extern unsigned long sched_group_shares(struct task_group *tg);
+extern int sched_group_set_weight(struct task_group *tg, unsigned long shares);
+extern unsigned long sched_group_weight(struct task_group *tg);
#endif
#ifdef CONFIG_RT_GROUP_SCHED
extern int sched_group_set_rt_runtime(struct task_group *tg,
Index: linux-2.6/kernel/user.c
===================================================================
--- linux-2.6.orig/kernel/user.c
+++ linux-2.6/kernel/user.c
@@ -142,7 +142,7 @@ static ssize_t cpu_shares_show(struct ko
{
struct user_struct *up = container_of(kobj, struct user_struct, kobj);
- return sprintf(buf, "%lu\n", sched_group_shares(up->tg));
+ return sprintf(buf, "%lu\n", sched_group_weight(up->tg));
}
static ssize_t cpu_shares_store(struct kobject *kobj,
@@ -155,7 +155,7 @@ static ssize_t cpu_shares_store(struct k
sscanf(buf, "%lu", &shares);
- rc = sched_group_set_shares(up->tg, shares);
+ rc = sched_group_set_weight(up->tg, shares);
return (rc ? rc : size);
}
--
^ permalink raw reply [flat|nested] 6+ messages in thread
* [PATCH 2/2] sched: group nice
2008-12-10 19:40 [PATCH 0/2] sched: task group weight interface Peter Zijlstra
2008-12-10 19:40 ` [PATCH 1/2] sched: tg->weight Peter Zijlstra
@ 2008-12-10 19:40 ` Peter Zijlstra
2008-12-12 9:31 ` [PATCH 0/2] sched: task group weight interface Ingo Molnar
2009-01-12 15:14 ` [PATCH 0/2] sched: task group weight interface Dhaval Giani
3 siblings, 0 replies; 6+ messages in thread
From: Peter Zijlstra @ 2008-12-10 19:40 UTC (permalink / raw)
To: mingo, dhaval, vatsa, cfriesen; +Cc: linux-kernel, Peter Zijlstra
[-- Attachment #1: sched-group-nice.patch --]
[-- Type: text/plain, Size: 1769 bytes --]
allow to use nice values to set group weights
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
---
kernel/sched.c | 39 +++++++++++++++++++++++++++++++++++++++
1 file changed, 39 insertions(+)
Index: linux-2.6/kernel/sched.c
===================================================================
--- linux-2.6.orig/kernel/sched.c
+++ linux-2.6/kernel/sched.c
@@ -8558,6 +8558,17 @@ static inline void unregister_fair_sched
{
list_del_rcu(&tg->cfs_rq[cpu]->leaf_cfs_rq_list);
}
+
+static int cpu_nice_write(struct cgroup *cgrp, struct cftype *cftype,
+ s64 niceval)
+{
+ return sched_group_set_nice(cgroup_tg(cgrp), niceval);
+}
+
+static s64 cpu_nice_read(struct cgroup *cgrp, struct cftype *cftype)
+{
+ return sched_group_nice(cgroup_tg(cgrp));
+}
#else /* !CONFG_FAIR_GROUP_SCHED */
static inline void free_fair_sched_group(struct task_group *tg)
{
@@ -8867,6 +8878,29 @@ unsigned long sched_group_weight(struct
{
return tg->weight;
}
+
+static int sched_group_set_nice(struct task_group *tg, int nice)
+{
+ unsigned int prio = nice + 20;
+
+ if (prio > ARRAY_SIZE(prio_to_weight))
+ return -EINVAL;
+
+ sched_group_set_weight(tg, prio_to_weight[prio]);
+ return 0;
+}
+
+static int sched_group_nice(struct task_group *tg)
+{
+ unsigned long weight = sched_group_weight(tg);
+ int prio;
+
+ for (prio = 0; prio < ARRAY_SIZE(prio_to_weight); prio++)
+ if (prio_to_weight[prio] <= weight)
+ break;
+
+ return prio - 20;
+}
#endif
#ifdef CONFIG_RT_GROUP_SCHED
@@ -9233,6 +9267,11 @@ static struct cftype cpu_files[] = {
.read_u64 = cpu_weight_read_u64,
.write_u64 = cpu_weight_write_u64,
},
+ {
+ .name = "nice",
+ .read_s64 = cpu_nice_read,
+ .write_s64 = cpu_nice_write,
+ },
#endif
#ifdef CONFIG_RT_GROUP_SCHED
{
--
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 0/2] sched: task group weight interface
2008-12-10 19:40 [PATCH 0/2] sched: task group weight interface Peter Zijlstra
2008-12-10 19:40 ` [PATCH 1/2] sched: tg->weight Peter Zijlstra
2008-12-10 19:40 ` [PATCH 2/2] sched: group nice Peter Zijlstra
@ 2008-12-12 9:31 ` Ingo Molnar
2008-12-14 4:58 ` [RESEND][PATCH]: sched: Fix compile errors introduced by new group scheduler interface Dhaval Giani
2009-01-12 15:14 ` [PATCH 0/2] sched: task group weight interface Dhaval Giani
3 siblings, 1 reply; 6+ messages in thread
From: Ingo Molnar @ 2008-12-12 9:31 UTC (permalink / raw)
To: Peter Zijlstra; +Cc: dhaval, vatsa, cfriesen, linux-kernel
* Peter Zijlstra <a.p.zijlstra@chello.nl> wrote:
> Hi,
>
> Dhaval poked me that he (and others) didn't like the weight interface
> we currently have for task groups. I concurr and dusted off these old
> patches.
applied to tip/sched/core, thanks Peter!
Ingo
^ permalink raw reply [flat|nested] 6+ messages in thread
* [RESEND][PATCH]: sched: Fix compile errors introduced by new group scheduler interface
2008-12-12 9:31 ` [PATCH 0/2] sched: task group weight interface Ingo Molnar
@ 2008-12-14 4:58 ` Dhaval Giani
0 siblings, 0 replies; 6+ messages in thread
From: Dhaval Giani @ 2008-12-14 4:58 UTC (permalink / raw)
To: Ingo Molnar; +Cc: Peter Zijlstra, vatsa, cfriesen, linux-kernel
> applied to tip/sched/core, thanks Peter!
>
Also needs this to build,
sched: Fix compile errors introduced by new group scheduler interface
commit e642daa433a5ea1599965576dcea70dcc0a36608 introduces
kernel/sched.c: In function ‘cpu_nice_write’:
kernel/sched.c:8505: error: implicit declaration of function ‘sched_group_set_nice’
kernel/sched.c:8505: error: implicit declaration of function ‘cgroup_tg’
kernel/sched.c: In function ‘cpu_nice_read’:
kernel/sched.c:8510: error: implicit declaration of function ‘sched_group_nice’
kernel/sched.c: At top level:
kernel/sched.c:8822: error: static declaration of ‘sched_group_set_nice’ follows non-static declaration
kernel/sched.c:8505: error: previous implicit declaration of ‘sched_group_set_nice’ was here
kernel/sched.c:8833: error: static declaration of ‘sched_group_nice’ follows non-static declaration
kernel/sched.c:8510: error: previous implicit declaration of ‘sched_group_nice’ was here
kernel/sched.c:9103: error: conflicting types for ‘cgroup_tg’
kernel/sched.c:8505: error: previous implicit declaration of ‘cgroup_tg’ was here
make[1]: *** [kernel/sched.o] Error 1
make: *** [kernel/sched.o] Error 2
Fix those.
Signed-off-by: Dhaval Giani <dhaval@linux.vnet.ibm.com>
---
kernel/sched.c | 20 +++++++++++---------
1 file changed, 11 insertions(+), 9 deletions(-)
Index: linux-2.6/kernel/sched.c
===================================================================
--- linux-2.6.orig/kernel/sched.c 2008-12-12 16:18:54.000000000 +0530
+++ linux-2.6/kernel/sched.c 2008-12-12 16:21:36.000000000 +0530
@@ -8499,16 +8499,7 @@ static inline void unregister_fair_sched
list_del_rcu(&tg->cfs_rq[cpu]->leaf_cfs_rq_list);
}
-static int cpu_nice_write(struct cgroup *cgrp, struct cftype *cftype,
- s64 niceval)
-{
- return sched_group_set_nice(cgroup_tg(cgrp), niceval);
-}
-static s64 cpu_nice_read(struct cgroup *cgrp, struct cftype *cftype)
-{
- return sched_group_nice(cgroup_tg(cgrp));
-}
#else /* !CONFG_FAIR_GROUP_SCHED */
static inline void free_fair_sched_group(struct task_group *tg)
{
@@ -9169,6 +9160,17 @@ static u64 cpu_weight_read_u64(struct cg
return (u64) tg->weight;
}
+
+static int cpu_nice_write(struct cgroup *cgrp, struct cftype *cftype,
+ s64 niceval)
+{
+ return sched_group_set_nice(cgroup_tg(cgrp), niceval);
+}
+
+static s64 cpu_nice_read(struct cgroup *cgrp, struct cftype *cftype)
+{
+ return sched_group_nice(cgroup_tg(cgrp));
+}
#endif /* CONFIG_FAIR_GROUP_SCHED */
#ifdef CONFIG_RT_GROUP_SCHED
--
regards,
Dhaval
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH 0/2] sched: task group weight interface
2008-12-10 19:40 [PATCH 0/2] sched: task group weight interface Peter Zijlstra
` (2 preceding siblings ...)
2008-12-12 9:31 ` [PATCH 0/2] sched: task group weight interface Ingo Molnar
@ 2009-01-12 15:14 ` Dhaval Giani
3 siblings, 0 replies; 6+ messages in thread
From: Dhaval Giani @ 2009-01-12 15:14 UTC (permalink / raw)
To: Peter Zijlstra; +Cc: mingo, vatsa, cfriesen, linux-kernel, Balbir Singh
On Wed, Dec 10, 2008 at 08:40:48PM +0100, Peter Zijlstra wrote:
> Hi,
>
> Dhaval poked me that he (and others) didn't like the weight interface we
> currently have for task groups. I concurr and dusted off these old patches.
>
/me wonders what happened to these patches?
>
> --
--
regards,
Dhaval
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2009-01-12 15:14 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2008-12-10 19:40 [PATCH 0/2] sched: task group weight interface Peter Zijlstra
2008-12-10 19:40 ` [PATCH 1/2] sched: tg->weight Peter Zijlstra
2008-12-10 19:40 ` [PATCH 2/2] sched: group nice Peter Zijlstra
2008-12-12 9:31 ` [PATCH 0/2] sched: task group weight interface Ingo Molnar
2008-12-14 4:58 ` [RESEND][PATCH]: sched: Fix compile errors introduced by new group scheduler interface Dhaval Giani
2009-01-12 15:14 ` [PATCH 0/2] sched: task group weight interface Dhaval Giani
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