* [PATCH v2 0/3] sched/debug: Add uclamp values to procfs
@ 2020-02-26 12:45 Valentin Schneider
2020-02-26 12:45 ` [PATCH v2 1/3] sched/debug: Remove redundant macro define Valentin Schneider
` (3 more replies)
0 siblings, 4 replies; 8+ messages in thread
From: Valentin Schneider @ 2020-02-26 12:45 UTC (permalink / raw)
To: linux-kernel
Cc: mingo, peterz, vincent.guittot, Dietmar.Eggemann,
patrick.bellasi, qais.yousef, t1zhou
Hi,
This is a small debug series I've been sitting on. It's been helpful in
testing and reviewing some uclamp stuff, for instance the issue Qais fixed
at [1] was really easy to observe with those debug prints.
[1]: https://lore.kernel.org/lkml/20191224115405.30622-1-qais.yousef@arm.com/
Cheers,
Valentin
Revisions
=========
v1 -> v2
--------
o Added parentheses for the casting part of the macros (Tao)
Valentin Schneider (3):
sched/debug: Remove redundant macro define
sched/debug: Bunch up printing formats in common macros
sched/debug: Add task uclamp values to SCHED_DEBUG procfs
kernel/sched/debug.c | 44 ++++++++++++++++++--------------------------
1 file changed, 18 insertions(+), 26 deletions(-)
--
2.24.0
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH v2 1/3] sched/debug: Remove redundant macro define
2020-02-26 12:45 [PATCH v2 0/3] sched/debug: Add uclamp values to procfs Valentin Schneider
@ 2020-02-26 12:45 ` Valentin Schneider
2020-04-08 12:20 ` [tip: sched/urgent] " tip-bot2 for Valentin Schneider
2020-02-26 12:45 ` [PATCH v2 2/3] sched/debug: Bunch up printing formats in common macros Valentin Schneider
` (2 subsequent siblings)
3 siblings, 1 reply; 8+ messages in thread
From: Valentin Schneider @ 2020-02-26 12:45 UTC (permalink / raw)
To: linux-kernel
Cc: mingo, peterz, vincent.guittot, Dietmar.Eggemann,
patrick.bellasi, qais.yousef, t1zhou
Most printing macros for procfs are defined globally in debug.c, and they
are re-defined (to the exact same thing) within proc_sched_show_task().
Get rid of the duplicate defines.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
---
kernel/sched/debug.c | 12 ------------
1 file changed, 12 deletions(-)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 8331bc04aea2..4670151eb131 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -868,16 +868,8 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
SEQ_printf(m,
"---------------------------------------------------------"
"----------\n");
-#define __P(F) \
- SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F)
-#define P(F) \
- SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F)
#define P_SCHEDSTAT(F) \
SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)schedstat_val(p->F))
-#define __PN(F) \
- SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
-#define PN(F) \
- SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
#define PN_SCHEDSTAT(F) \
SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)schedstat_val(p->F)))
@@ -963,11 +955,7 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
P(dl.deadline);
}
#undef PN_SCHEDSTAT
-#undef PN
-#undef __PN
#undef P_SCHEDSTAT
-#undef P
-#undef __P
{
unsigned int this_cpu = raw_smp_processor_id();
--
2.24.0
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 2/3] sched/debug: Bunch up printing formats in common macros
2020-02-26 12:45 [PATCH v2 0/3] sched/debug: Add uclamp values to procfs Valentin Schneider
2020-02-26 12:45 ` [PATCH v2 1/3] sched/debug: Remove redundant macro define Valentin Schneider
@ 2020-02-26 12:45 ` Valentin Schneider
2020-04-08 12:20 ` [tip: sched/urgent] sched/debug: Factor out printing formats into " tip-bot2 for Valentin Schneider
2020-02-26 12:45 ` [PATCH v2 3/3] sched/debug: Add task uclamp values to SCHED_DEBUG procfs Valentin Schneider
2020-02-27 10:42 ` [PATCH v2 0/3] sched/debug: Add uclamp values to procfs Qais Yousef
3 siblings, 1 reply; 8+ messages in thread
From: Valentin Schneider @ 2020-02-26 12:45 UTC (permalink / raw)
To: linux-kernel
Cc: mingo, peterz, vincent.guittot, Dietmar.Eggemann,
patrick.bellasi, qais.yousef, t1zhou
The printing macros in debug.c keep redefining the same output
format. Collect each output format in a single definition, and reuse that
definition in the other macros. While at it, add a layer of parentheses and
replace printf's with the newly introduced macros.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
---
kernel/sched/debug.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 4670151eb131..315ef6de3cc4 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -816,10 +816,12 @@ static int __init init_sched_debug_procfs(void)
__initcall(init_sched_debug_procfs);
-#define __P(F) SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F)
-#define P(F) SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F)
-#define __PN(F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
-#define PN(F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
+#define __PS(S, F) SEQ_printf(m, "%-45s:%21Ld\n", S, (long long)(F))
+#define __P(F) __PS(#F, F)
+#define P(F) __PS(#F, p->F)
+#define __PSN(S, F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", S, SPLIT_NS((long long)(F)))
+#define __PN(F) __PSN(#F, F)
+#define PN(F) __PSN(#F, p->F)
#ifdef CONFIG_NUMA_BALANCING
@@ -868,10 +870,9 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
SEQ_printf(m,
"---------------------------------------------------------"
"----------\n");
-#define P_SCHEDSTAT(F) \
- SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)schedstat_val(p->F))
-#define PN_SCHEDSTAT(F) \
- SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)schedstat_val(p->F)))
+
+#define P_SCHEDSTAT(F) __PS(#F, schedstat_val(p->F))
+#define PN_SCHEDSTAT(F) __PSN(#F, schedstat_val(p->F))
PN(se.exec_start);
PN(se.vruntime);
@@ -931,10 +932,8 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
}
__P(nr_switches);
- SEQ_printf(m, "%-45s:%21Ld\n",
- "nr_voluntary_switches", (long long)p->nvcsw);
- SEQ_printf(m, "%-45s:%21Ld\n",
- "nr_involuntary_switches", (long long)p->nivcsw);
+ __PS("nr_voluntary_switches", p->nvcsw);
+ __PS("nr_involuntary_switches", p->nivcsw);
P(se.load.weight);
#ifdef CONFIG_SMP
@@ -963,8 +962,7 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
t0 = cpu_clock(this_cpu);
t1 = cpu_clock(this_cpu);
- SEQ_printf(m, "%-45s:%21Ld\n",
- "clock-delta", (long long)(t1-t0));
+ __PS("clock-delta", t1-t0);
}
sched_show_numa(p, m);
--
2.24.0
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [PATCH v2 3/3] sched/debug: Add task uclamp values to SCHED_DEBUG procfs
2020-02-26 12:45 [PATCH v2 0/3] sched/debug: Add uclamp values to procfs Valentin Schneider
2020-02-26 12:45 ` [PATCH v2 1/3] sched/debug: Remove redundant macro define Valentin Schneider
2020-02-26 12:45 ` [PATCH v2 2/3] sched/debug: Bunch up printing formats in common macros Valentin Schneider
@ 2020-02-26 12:45 ` Valentin Schneider
2020-04-08 12:20 ` [tip: sched/urgent] " tip-bot2 for Valentin Schneider
2020-02-27 10:42 ` [PATCH v2 0/3] sched/debug: Add uclamp values to procfs Qais Yousef
3 siblings, 1 reply; 8+ messages in thread
From: Valentin Schneider @ 2020-02-26 12:45 UTC (permalink / raw)
To: linux-kernel
Cc: mingo, peterz, vincent.guittot, Dietmar.Eggemann,
patrick.bellasi, qais.yousef, t1zhou
Requested and effective uclamp values can be a bit tricky to decipher when
playing with cgroup hierarchies. Add them to a task's procfs when
SCHED_DEBUG is enabled.
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
---
kernel/sched/debug.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 315ef6de3cc4..a562df57a86e 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -946,6 +946,12 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
P(se.avg.last_update_time);
P(se.avg.util_est.ewma);
P(se.avg.util_est.enqueued);
+#endif
+#ifdef CONFIG_UCLAMP_TASK
+ __PS("uclamp.min", p->uclamp[UCLAMP_MIN].value);
+ __PS("uclamp.max", p->uclamp[UCLAMP_MAX].value);
+ __PS("effective uclamp.min", uclamp_eff_value(p, UCLAMP_MIN));
+ __PS("effective uclamp.max", uclamp_eff_value(p, UCLAMP_MAX));
#endif
P(policy);
P(prio);
--
2.24.0
^ permalink raw reply related [flat|nested] 8+ messages in thread
* Re: [PATCH v2 0/3] sched/debug: Add uclamp values to procfs
2020-02-26 12:45 [PATCH v2 0/3] sched/debug: Add uclamp values to procfs Valentin Schneider
` (2 preceding siblings ...)
2020-02-26 12:45 ` [PATCH v2 3/3] sched/debug: Add task uclamp values to SCHED_DEBUG procfs Valentin Schneider
@ 2020-02-27 10:42 ` Qais Yousef
3 siblings, 0 replies; 8+ messages in thread
From: Qais Yousef @ 2020-02-27 10:42 UTC (permalink / raw)
To: Valentin Schneider
Cc: linux-kernel, mingo, peterz, vincent.guittot, Dietmar.Eggemann,
patrick.bellasi, t1zhou
On 02/26/20 12:45, Valentin Schneider wrote:
> Hi,
>
> This is a small debug series I've been sitting on. It's been helpful in
> testing and reviewing some uclamp stuff, for instance the issue Qais fixed
> at [1] was really easy to observe with those debug prints.
>
> [1]: https://lore.kernel.org/lkml/20191224115405.30622-1-qais.yousef@arm.com/
That would be handy indeed. And nice cleanup along the way.
For the series
Reviewed-by: Qais Yousef <qais.yousef@arm.com>
Cheers
--
Qais Yousef
>
> Cheers,
> Valentin
>
> Revisions
> =========
>
> v1 -> v2
> --------
> o Added parentheses for the casting part of the macros (Tao)
>
> Valentin Schneider (3):
> sched/debug: Remove redundant macro define
> sched/debug: Bunch up printing formats in common macros
> sched/debug: Add task uclamp values to SCHED_DEBUG procfs
>
> kernel/sched/debug.c | 44 ++++++++++++++++++--------------------------
> 1 file changed, 18 insertions(+), 26 deletions(-)
>
> --
> 2.24.0
>
^ permalink raw reply [flat|nested] 8+ messages in thread
* [tip: sched/urgent] sched/debug: Factor out printing formats into common macros
2020-02-26 12:45 ` [PATCH v2 2/3] sched/debug: Bunch up printing formats in common macros Valentin Schneider
@ 2020-04-08 12:20 ` tip-bot2 for Valentin Schneider
0 siblings, 0 replies; 8+ messages in thread
From: tip-bot2 for Valentin Schneider @ 2020-04-08 12:20 UTC (permalink / raw)
To: linux-tip-commits
Cc: Qais Yousef, Valentin Schneider, Peter Zijlstra (Intel),
Ingo Molnar, x86, LKML
The following commit has been merged into the sched/urgent branch of tip:
Commit-ID: 9e3bf9469c29f7e4e49c5c0d8fecaf8ac57d1fe4
Gitweb: https://git.kernel.org/tip/9e3bf9469c29f7e4e49c5c0d8fecaf8ac57d1fe4
Author: Valentin Schneider <valentin.schneider@arm.com>
AuthorDate: Wed, 26 Feb 2020 12:45:42
Committer: Ingo Molnar <mingo@kernel.org>
CommitterDate: Wed, 08 Apr 2020 11:35:26 +02:00
sched/debug: Factor out printing formats into common macros
The printing macros in debug.c keep redefining the same output
format. Collect each output format in a single definition, and reuse that
definition in the other macros. While at it, add a layer of parentheses and
replace printf's with the newly introduced macros.
Reviewed-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200226124543.31986-3-valentin.schneider@arm.com
---
kernel/sched/debug.c | 26 ++++++++++++--------------
1 file changed, 12 insertions(+), 14 deletions(-)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 4670151..315ef6d 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -816,10 +816,12 @@ static int __init init_sched_debug_procfs(void)
__initcall(init_sched_debug_procfs);
-#define __P(F) SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F)
-#define P(F) SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F)
-#define __PN(F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
-#define PN(F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
+#define __PS(S, F) SEQ_printf(m, "%-45s:%21Ld\n", S, (long long)(F))
+#define __P(F) __PS(#F, F)
+#define P(F) __PS(#F, p->F)
+#define __PSN(S, F) SEQ_printf(m, "%-45s:%14Ld.%06ld\n", S, SPLIT_NS((long long)(F)))
+#define __PN(F) __PSN(#F, F)
+#define PN(F) __PSN(#F, p->F)
#ifdef CONFIG_NUMA_BALANCING
@@ -868,10 +870,9 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
SEQ_printf(m,
"---------------------------------------------------------"
"----------\n");
-#define P_SCHEDSTAT(F) \
- SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)schedstat_val(p->F))
-#define PN_SCHEDSTAT(F) \
- SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)schedstat_val(p->F)))
+
+#define P_SCHEDSTAT(F) __PS(#F, schedstat_val(p->F))
+#define PN_SCHEDSTAT(F) __PSN(#F, schedstat_val(p->F))
PN(se.exec_start);
PN(se.vruntime);
@@ -931,10 +932,8 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
}
__P(nr_switches);
- SEQ_printf(m, "%-45s:%21Ld\n",
- "nr_voluntary_switches", (long long)p->nvcsw);
- SEQ_printf(m, "%-45s:%21Ld\n",
- "nr_involuntary_switches", (long long)p->nivcsw);
+ __PS("nr_voluntary_switches", p->nvcsw);
+ __PS("nr_involuntary_switches", p->nivcsw);
P(se.load.weight);
#ifdef CONFIG_SMP
@@ -963,8 +962,7 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
t0 = cpu_clock(this_cpu);
t1 = cpu_clock(this_cpu);
- SEQ_printf(m, "%-45s:%21Ld\n",
- "clock-delta", (long long)(t1-t0));
+ __PS("clock-delta", t1-t0);
}
sched_show_numa(p, m);
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [tip: sched/urgent] sched/debug: Add task uclamp values to SCHED_DEBUG procfs
2020-02-26 12:45 ` [PATCH v2 3/3] sched/debug: Add task uclamp values to SCHED_DEBUG procfs Valentin Schneider
@ 2020-04-08 12:20 ` tip-bot2 for Valentin Schneider
0 siblings, 0 replies; 8+ messages in thread
From: tip-bot2 for Valentin Schneider @ 2020-04-08 12:20 UTC (permalink / raw)
To: linux-tip-commits
Cc: Qais Yousef, Valentin Schneider, Peter Zijlstra (Intel),
Ingo Molnar, x86, LKML
The following commit has been merged into the sched/urgent branch of tip:
Commit-ID: 96e74ebf8d594496f3dda5f8e26af6b4e161e4e9
Gitweb: https://git.kernel.org/tip/96e74ebf8d594496f3dda5f8e26af6b4e161e4e9
Author: Valentin Schneider <valentin.schneider@arm.com>
AuthorDate: Wed, 26 Feb 2020 12:45:43
Committer: Ingo Molnar <mingo@kernel.org>
CommitterDate: Wed, 08 Apr 2020 11:35:27 +02:00
sched/debug: Add task uclamp values to SCHED_DEBUG procfs
Requested and effective uclamp values can be a bit tricky to decipher when
playing with cgroup hierarchies. Add them to a task's procfs when
SCHED_DEBUG is enabled.
Reviewed-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200226124543.31986-4-valentin.schneider@arm.com
---
kernel/sched/debug.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 315ef6d..a562df5 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -947,6 +947,12 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
P(se.avg.util_est.ewma);
P(se.avg.util_est.enqueued);
#endif
+#ifdef CONFIG_UCLAMP_TASK
+ __PS("uclamp.min", p->uclamp[UCLAMP_MIN].value);
+ __PS("uclamp.max", p->uclamp[UCLAMP_MAX].value);
+ __PS("effective uclamp.min", uclamp_eff_value(p, UCLAMP_MIN));
+ __PS("effective uclamp.max", uclamp_eff_value(p, UCLAMP_MAX));
+#endif
P(policy);
P(prio);
if (task_has_dl_policy(p)) {
^ permalink raw reply related [flat|nested] 8+ messages in thread
* [tip: sched/urgent] sched/debug: Remove redundant macro define
2020-02-26 12:45 ` [PATCH v2 1/3] sched/debug: Remove redundant macro define Valentin Schneider
@ 2020-04-08 12:20 ` tip-bot2 for Valentin Schneider
0 siblings, 0 replies; 8+ messages in thread
From: tip-bot2 for Valentin Schneider @ 2020-04-08 12:20 UTC (permalink / raw)
To: linux-tip-commits
Cc: Qais Yousef, Valentin Schneider, Peter Zijlstra (Intel),
Ingo Molnar, x86, LKML
The following commit has been merged into the sched/urgent branch of tip:
Commit-ID: c745a6212c9923eb2253f4229e5d7277ca3d9d8e
Gitweb: https://git.kernel.org/tip/c745a6212c9923eb2253f4229e5d7277ca3d9d8e
Author: Valentin Schneider <valentin.schneider@arm.com>
AuthorDate: Wed, 26 Feb 2020 12:45:41
Committer: Ingo Molnar <mingo@kernel.org>
CommitterDate: Wed, 08 Apr 2020 11:35:24 +02:00
sched/debug: Remove redundant macro define
Most printing macros for procfs are defined globally in debug.c, and they
are re-defined (to the exact same thing) within proc_sched_show_task().
Get rid of the duplicate defines.
Reviewed-by: Qais Yousef <qais.yousef@arm.com>
Signed-off-by: Valentin Schneider <valentin.schneider@arm.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lkml.kernel.org/r/20200226124543.31986-2-valentin.schneider@arm.com
---
kernel/sched/debug.c | 12 ------------
1 file changed, 12 deletions(-)
diff --git a/kernel/sched/debug.c b/kernel/sched/debug.c
index 8331bc0..4670151 100644
--- a/kernel/sched/debug.c
+++ b/kernel/sched/debug.c
@@ -868,16 +868,8 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
SEQ_printf(m,
"---------------------------------------------------------"
"----------\n");
-#define __P(F) \
- SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)F)
-#define P(F) \
- SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)p->F)
#define P_SCHEDSTAT(F) \
SEQ_printf(m, "%-45s:%21Ld\n", #F, (long long)schedstat_val(p->F))
-#define __PN(F) \
- SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)F))
-#define PN(F) \
- SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)p->F))
#define PN_SCHEDSTAT(F) \
SEQ_printf(m, "%-45s:%14Ld.%06ld\n", #F, SPLIT_NS((long long)schedstat_val(p->F)))
@@ -963,11 +955,7 @@ void proc_sched_show_task(struct task_struct *p, struct pid_namespace *ns,
P(dl.deadline);
}
#undef PN_SCHEDSTAT
-#undef PN
-#undef __PN
#undef P_SCHEDSTAT
-#undef P
-#undef __P
{
unsigned int this_cpu = raw_smp_processor_id();
^ permalink raw reply related [flat|nested] 8+ messages in thread
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2020-02-26 12:45 [PATCH v2 0/3] sched/debug: Add uclamp values to procfs Valentin Schneider
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