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From: Waiman Long <longman@redhat.com>
To: Tejun Heo <tj@kernel.org>, Li Zefan <lizefan@huawei.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>
Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-doc@vger.kernel.org, kernel-team@fb.com, pjt@google.com,
	luto@amacapital.net, Mike Galbraith <efault@gmx.de>,
	torvalds@linux-foundation.org, Roman Gushchin <guro@fb.com>,
	Juri Lelli <juri.lelli@redhat.com>,
	Patrick Bellasi <patrick.bellasi@arm.com>,
	Waiman Long <longman@redhat.com>
Subject: [PATCH v9 7/7] cpuset: Allow reporting of sched domain generation info
Date: Tue, 29 May 2018 09:41:34 -0400	[thread overview]
Message-ID: <1527601294-3444-8-git-send-email-longman@redhat.com> (raw)
In-Reply-To: <1527601294-3444-1-git-send-email-longman@redhat.com>

This patch enables us to report sched domain generation information.

If DYNAMIC_DEBUG is enabled, issuing the following command

  echo "file cpuset.c +p" > /sys/kernel/debug/dynamic_debug/control

and setting loglevel to 8 will allow the kernel to show what scheduling
domain changes are being made.

Signed-off-by: Waiman Long <longman@redhat.com>
---
 kernel/cgroup/cpuset.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 9513f90..71fb2d0 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -820,6 +820,12 @@ static int generate_sched_domains(cpumask_var_t **domains,
 	}
 	BUG_ON(nslot != ndoms);
 
+#ifdef CONFIG_DEBUG_KERNEL
+	for (i = 0; i < ndoms; i++)
+		pr_debug("generate_sched_domains dom %d: %*pbl\n", i,
+			 cpumask_pr_args(doms[i]));
+#endif
+
 done:
 	kfree(csa);
 
-- 
1.8.3.1

WARNING: multiple messages have this Message-ID (diff)
From: Waiman Long <longman@redhat.com>
To: Tejun Heo <tj@kernel.org>, Li Zefan <lizefan@huawei.com>,
	Johannes Weiner <hannes@cmpxchg.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Ingo Molnar <mingo@redhat.com>
Cc: cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-doc@vger.kernel.org, kernel-team@fb.com, pjt@google.com,
	luto@amacapital.net, Mike Galbraith <efault@gmx.de>,
	torvalds@linux-foundation.org, Roman Gushchin <guro@fb.com>,
	Juri Lelli <juri.lelli@redhat.com>,
	Patrick Bellasi <patrick.bellasi@arm.com>,
	Waiman Long <longman@redhat.com>
Subject: [PATCH v9 7/7] cpuset: Allow reporting of sched domain generation info
Date: Tue, 29 May 2018 09:41:34 -0400	[thread overview]
Message-ID: <1527601294-3444-8-git-send-email-longman@redhat.com> (raw)
In-Reply-To: <1527601294-3444-1-git-send-email-longman@redhat.com>

This patch enables us to report sched domain generation information.

If DYNAMIC_DEBUG is enabled, issuing the following command

  echo "file cpuset.c +p" > /sys/kernel/debug/dynamic_debug/control

and setting loglevel to 8 will allow the kernel to show what scheduling
domain changes are being made.

Signed-off-by: Waiman Long <longman@redhat.com>
---
 kernel/cgroup/cpuset.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/kernel/cgroup/cpuset.c b/kernel/cgroup/cpuset.c
index 9513f90..71fb2d0 100644
--- a/kernel/cgroup/cpuset.c
+++ b/kernel/cgroup/cpuset.c
@@ -820,6 +820,12 @@ static int generate_sched_domains(cpumask_var_t **domains,
 	}
 	BUG_ON(nslot != ndoms);
 
+#ifdef CONFIG_DEBUG_KERNEL
+	for (i = 0; i < ndoms; i++)
+		pr_debug("generate_sched_domains dom %d: %*pbl\n", i,
+			 cpumask_pr_args(doms[i]));
+#endif
+
 done:
 	kfree(csa);
 
-- 
1.8.3.1

--
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  parent reply	other threads:[~2018-05-29 13:42 UTC|newest]

Thread overview: 54+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-29 13:41 [PATCH v9 0/7] Enable cpuset controller in default hierarchy Waiman Long
2018-05-29 13:41 ` Waiman Long
2018-05-29 13:41 ` [PATCH v9 1/7] cpuset: " Waiman Long
2018-05-29 13:41   ` Waiman Long
2018-05-29 13:41 ` [PATCH v9 2/7] cpuset: Add new v2 cpuset.sched.domain_root flag Waiman Long
2018-05-29 13:41   ` Waiman Long
2018-05-30 14:18   ` Juri Lelli
2018-05-30 14:18     ` Juri Lelli
2018-05-30 14:57     ` Waiman Long
2018-05-30 14:57       ` Waiman Long
2018-05-31  9:49   ` Peter Zijlstra
2018-05-31  9:49     ` Peter Zijlstra
2018-05-29 13:41 ` [PATCH v9 3/7] cpuset: Add cpuset.sched.load_balance flag to v2 Waiman Long
2018-05-29 13:41   ` Waiman Long
2018-05-31 10:44   ` Peter Zijlstra
2018-05-31 10:44     ` Peter Zijlstra
2018-05-31 10:54   ` Peter Zijlstra
2018-05-31 10:54     ` Peter Zijlstra
2018-05-31 13:36     ` Waiman Long
2018-05-31 13:36       ` Waiman Long
2018-05-31 12:26   ` Peter Zijlstra
2018-05-31 12:26     ` Peter Zijlstra
2018-05-31 13:54     ` Waiman Long
2018-05-31 13:54       ` Waiman Long
2018-05-31 15:20       ` Peter Zijlstra
2018-05-31 15:20         ` Peter Zijlstra
2018-05-31 15:36         ` Waiman Long
2018-05-31 15:36           ` Waiman Long
2018-05-31 16:08           ` Peter Zijlstra
2018-05-31 16:08             ` Peter Zijlstra
2018-05-31 16:42             ` Waiman Long
2018-05-31 16:42               ` Waiman Long
2018-06-20 14:46               ` Peter Zijlstra
2018-06-20 14:46                 ` Peter Zijlstra
2018-06-21  7:40                 ` Waiman Long
2018-06-21  7:40                   ` Waiman Long
2018-05-29 13:41 ` [PATCH v9 4/7] cpuset: Make generate_sched_domains() recognize isolated_cpus Waiman Long
2018-05-29 13:41   ` Waiman Long
2018-05-29 13:41 ` [PATCH v9 5/7] cpuset: Expose cpus.effective and mems.effective on cgroup v2 root Waiman Long
2018-05-29 13:41   ` Waiman Long
2018-05-29 13:41 ` [PATCH v9 6/7] cpuset: Don't rebuild sched domains if cpu changes in non-domain root Waiman Long
2018-05-29 13:41   ` Waiman Long
2018-05-29 13:41 ` Waiman Long [this message]
2018-05-29 13:41   ` [PATCH v9 7/7] cpuset: Allow reporting of sched domain generation info Waiman Long
2018-05-30 10:13 ` [PATCH v9 0/7] Enable cpuset controller in default hierarchy Juri Lelli
2018-05-30 10:13   ` Juri Lelli
2018-05-30 12:56   ` Waiman Long
2018-05-30 12:56     ` Waiman Long
2018-05-30 13:05     ` Juri Lelli
2018-05-30 13:05       ` Juri Lelli
2018-05-30 13:47       ` Waiman Long
2018-05-30 13:47         ` Waiman Long
2018-05-30 13:52         ` Juri Lelli
2018-05-30 13:52           ` Juri Lelli

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