linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Frederic Weisbecker <frederic@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Frederic Weisbecker <frederic@kernel.org>,
	Peter Zijlstra <peterz@infradead.org>,
	Wanpeng Li <wanpengli@tencent.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Yauheni Kaliuta <yauheni.kaliuta@redhat.com>,
	Ingo Molnar <mingo@kernel.org>, Rik van Riel <riel@redhat.com>
Subject: [PATCH 16/25] sched/cputime: Allow to pass cputime index on user/guest accounting
Date: Wed, 14 Nov 2018 03:46:00 +0100	[thread overview]
Message-ID: <1542163569-20047-17-git-send-email-frederic@kernel.org> (raw)
In-Reply-To: <1542163569-20047-1-git-send-email-frederic@kernel.org>

When we account user or guest cputime, we decide to add the delta either
to the nice fields or the normal fields of kcpustat and this depends on
the nice value for the task passed in parameter.

Since we are going to track the nice-ness from vtime instead, we'll need
to be able to use a different source than the task passed in parameter
on accounting time. So allow the callers of account_user/guest_time() to
pass custom kcpustat destination index fields.

Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
Cc: Yauheni Kaliuta <yauheni.kaliuta@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Wanpeng Li <wanpengli@tencent.com>
Cc: Ingo Molnar <mingo@kernel.org>
---
 kernel/sched/cputime.c | 50 ++++++++++++++++++++++++++++++++------------------
 1 file changed, 32 insertions(+), 18 deletions(-)

diff --git a/kernel/sched/cputime.c b/kernel/sched/cputime.c
index 61aa7ba..63c4f0b 100644
--- a/kernel/sched/cputime.c
+++ b/kernel/sched/cputime.c
@@ -108,6 +108,20 @@ static inline void task_group_account_field(struct task_struct *p, int index,
 	cgroup_account_cputime_field(p, index, tmp);
 }
 
+static void account_user_time_index(struct task_struct *p,
+				    u64 cputime, enum cpu_usage_stat index)
+{
+	/* Add user time to process. */
+	p->utime += cputime;
+	account_group_user_time(p, cputime);
+
+	/* Add user time to cpustat. */
+	task_group_account_field(p, index, cputime);
+
+	/* Account for user time used */
+	acct_account_cputime(p);
+}
+
 /*
  * Account user CPU time to a process.
  * @p: the process that the CPU time gets accounted to
@@ -115,27 +129,14 @@ static inline void task_group_account_field(struct task_struct *p, int index,
  */
 void account_user_time(struct task_struct *p, u64 cputime)
 {
-	int index;
-
-	/* Add user time to process. */
-	p->utime += cputime;
-	account_group_user_time(p, cputime);
+	enum cpu_usage_stat index;
 
 	index = (task_nice(p) > 0) ? CPUTIME_NICE : CPUTIME_USER;
-
-	/* Add user time to cpustat. */
-	task_group_account_field(p, index, cputime);
-
-	/* Account for user time used */
-	acct_account_cputime(p);
+	account_user_time_index(p, cputime, index);
 }
 
-/*
- * Account guest CPU time to a process.
- * @p: the process that the CPU time gets accounted to
- * @cputime: the CPU time spent in virtual machine since the last update
- */
-void account_guest_time(struct task_struct *p, u64 cputime)
+static void account_guest_time_index(struct task_struct *p,
+				     u64 cputime, enum cpu_usage_stat index)
 {
 	u64 *cpustat = kcpustat_this_cpu->cpustat;
 
@@ -145,7 +146,7 @@ void account_guest_time(struct task_struct *p, u64 cputime)
 	p->gtime += cputime;
 
 	/* Add guest time to cpustat. */
-	if (task_nice(p) > 0) {
+	if (index == CPUTIME_GUEST_NICE) {
 		cpustat[CPUTIME_NICE] += cputime;
 		cpustat[CPUTIME_GUEST_NICE] += cputime;
 	} else {
@@ -155,6 +156,19 @@ void account_guest_time(struct task_struct *p, u64 cputime)
 }
 
 /*
+ * Account guest CPU time to a process.
+ * @p: the process that the CPU time gets accounted to
+ * @cputime: the CPU time spent in virtual machine since the last update
+ */
+void account_guest_time(struct task_struct *p, u64 cputime)
+{
+	enum cpu_usage_stat index;
+
+	index = (task_nice(p) > 0) ? CPUTIME_GUEST_NICE : CPUTIME_GUEST;
+	account_guest_time_index(p, cputime, index);
+}
+
+/*
  * Account system CPU time to a process and desired cpustat field
  * @p: the process that the CPU time gets accounted to
  * @cputime: the CPU time spent in kernel space since the last update
-- 
2.7.4


  parent reply	other threads:[~2018-11-14  2:47 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-14  2:45 [PATCH 00/25] sched/nohz: Make kcpustat vtime aware (Fix kcpustat on nohz_full) Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 01/25] sched/vtime: Fix guest/system mis-accounting on task switch Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 02/25] sched/vtime: Protect idle accounting under vtime seqcount Frederic Weisbecker
2018-11-20 13:19   ` Peter Zijlstra
2018-11-14  2:45 ` [PATCH 03/25] vtime: Rename vtime_account_system() to vtime_account_kernel() Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 04/25] vtime: Spare a seqcount lock/unlock cycle on context switch Frederic Weisbecker
2018-11-20 13:25   ` Peter Zijlstra
2019-09-25 14:42     ` Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 05/25] sched/vtime: Record CPU under seqcount for kcpustat needs Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 06/25] sched/cputime: Add vtime idle task state Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 07/25] sched/cputime: Add vtime guest " Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 08/25] vtime: Exit vtime before exit_notify() Frederic Weisbecker
2018-11-20 13:54   ` Peter Zijlstra
2018-11-14  2:45 ` [PATCH 09/25] kcpustat: Track running task following vtime sequences Frederic Weisbecker
2018-11-20 13:58   ` Peter Zijlstra
2018-11-14  2:45 ` [PATCH 10/25] context_tracking: Remove context_tracking_active() Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 11/25] context_tracking: s/context_tracking_is_enabled/context_tracking_enabled() Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 12/25] context_tracking: Rename context_tracking_is_cpu_enabled() to context_tracking_enabled_this_cpu() Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 13/25] context_tracking: Introduce context_tracking_enabled_cpu() Frederic Weisbecker
2018-11-20 14:02   ` Peter Zijlstra
2018-11-14  2:45 ` [PATCH 14/25] sched/vtime: Rename vtime_accounting_cpu_enabled() to vtime_accounting_enabled_this_cpu() Frederic Weisbecker
2018-11-14  2:45 ` [PATCH 15/25] sched/vtime: Introduce vtime_accounting_enabled_cpu() Frederic Weisbecker
2018-11-20 14:04   ` Peter Zijlstra
2018-11-14  2:46 ` Frederic Weisbecker [this message]
2018-11-14  2:46 ` [PATCH 17/25] sched/cputime: Standardize the kcpustat index based accounting functions Frederic Weisbecker
2018-11-14  2:46 ` [PATCH 18/25] vtime: Track nice-ness on top of context switch Frederic Weisbecker
2018-11-20 14:09   ` Peter Zijlstra
2018-11-14  2:46 ` [PATCH 19/25] sched/vite: Handle nice updates under vtime Frederic Weisbecker
2018-11-20 14:17   ` Peter Zijlstra
2018-11-26 15:53     ` Frederic Weisbecker
2018-11-26 16:11       ` Peter Zijlstra
2018-11-26 18:41         ` Frederic Weisbecker
2018-11-14  2:46 ` [PATCH 20/25] sched/kcpustat: Introduce vtime-aware kcpustat accessor Frederic Weisbecker
2018-11-20 14:23   ` Peter Zijlstra
2018-11-20 22:40     ` Frederic Weisbecker
2018-11-21  8:18       ` Peter Zijlstra
2018-11-21  8:35         ` Peter Zijlstra
2018-11-21 16:33         ` Frederic Weisbecker
2018-11-14  2:46 ` [PATCH 21/25] procfs: Use vtime aware " Frederic Weisbecker
2018-11-20 14:24   ` Peter Zijlstra
2018-11-20 22:31     ` Frederic Weisbecker
2018-11-14  2:46 ` [PATCH 22/25] cpufreq: " Frederic Weisbecker
2018-11-14  2:46 ` [PATCH 23/25] leds: Use vtime aware kcpustat accessors Frederic Weisbecker
2018-11-14  2:46 ` [PATCH 24/25] rackmeter: " Frederic Weisbecker
2018-11-14  2:46 ` [PATCH 25/25] sched/vtime: Clarify vtime_task_switch() argument layout Frederic Weisbecker

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=1542163569-20047-17-git-send-email-frederic@kernel.org \
    --to=frederic@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@kernel.org \
    --cc=peterz@infradead.org \
    --cc=riel@redhat.com \
    --cc=tglx@linutronix.de \
    --cc=wanpengli@tencent.com \
    --cc=yauheni.kaliuta@redhat.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).