From: "tip-bot2 for Thomas Gleixner" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Frederic Weisbecker <frederic@kernel.org>,
Ingo Molnar <mingo@kernel.org>, Borislav Petkov <bp@alien8.de>,
linux-kernel@vger.kernel.org
Subject: [tip: timers/core] posix-cpu-timers: Provide array based sample functions
Date: Wed, 28 Aug 2019 10:16:30 -0000 [thread overview]
Message-ID: <156698739018.5762.6168289869044091093.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20190821192921.590362974@linutronix.de>
The following commit has been merged into the timers/core branch of tip:
Commit-ID: b0d524f77956eec887b30732af1f5f98cbf62b9f
Gitweb: https://git.kernel.org/tip/b0d524f77956eec887b30732af1f5f98cbf62b9f
Author: Thomas Gleixner <tglx@linutronix.de>
AuthorDate: Wed, 21 Aug 2019 21:09:12 +02:00
Committer: Thomas Gleixner <tglx@linutronix.de>
CommitterDate: Wed, 28 Aug 2019 11:50:38 +02:00
posix-cpu-timers: Provide array based sample functions
Instead of using task_cputime and doing the addition of utime and stime at
all call sites, it's way simpler to have a sample array which allows
indexed based checks against the expiry cache array.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Link: https://lkml.kernel.org/r/20190821192921.590362974@linutronix.de
---
kernel/time/posix-cpu-timers.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/kernel/time/posix-cpu-timers.c b/kernel/time/posix-cpu-timers.c
index 220e3c7..11c841c 100644
--- a/kernel/time/posix-cpu-timers.c
+++ b/kernel/time/posix-cpu-timers.c
@@ -202,6 +202,32 @@ static u64 cpu_clock_sample(const clockid_t clkid, struct task_struct *p)
return 0;
}
+static inline void store_samples(u64 *samples, u64 stime, u64 utime, u64 rtime)
+{
+ samples[CPUCLOCK_PROF] = stime + utime;
+ samples[CPUCLOCK_VIRT] = utime;
+ samples[CPUCLOCK_SCHED] = rtime;
+}
+
+static void task_sample_cputime(struct task_struct *p, u64 *samples)
+{
+ u64 stime, utime;
+
+ task_cputime(p, &utime, &stime);
+ store_samples(samples, stime, utime, p->se.sum_exec_runtime);
+}
+
+static void proc_sample_cputime_atomic(struct task_cputime_atomic *at,
+ u64 *samples)
+{
+ u64 stime, utime, rtime;
+
+ utime = atomic64_read(&at->utime);
+ stime = atomic64_read(&at->stime);
+ rtime = atomic64_read(&at->sum_exec_runtime);
+ store_samples(samples, stime, utime, rtime);
+}
+
/*
* Set cputime to sum_cputime if sum_cputime > cputime. Use cmpxchg
* to avoid race conditions with concurrent updates to cputime.
next prev parent reply other threads:[~2019-08-28 10:18 UTC|newest]
Thread overview: 137+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-21 19:08 [patch V2 00/38] posix-cpu-timers: Cleanup and consolidation Thomas Gleixner
2019-08-21 19:08 ` [patch V2 01/38] posix-cpu-timers: Provide task validation functions Thomas Gleixner
2019-08-21 22:33 ` Frederic Weisbecker
2019-08-21 23:03 ` Frederic Weisbecker
2019-08-23 15:33 ` Thomas Gleixner
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:08 ` [patch V2 02/38] posix-cpu-timers: Use common permission check in posix_cpu_clock_get() Thomas Gleixner
2019-08-21 23:40 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-29 11:00 ` kbuild test robot
2019-08-29 11:21 ` Thomas Gleixner
2019-08-30 1:08 ` [kbuild-all] " Philip Li
2019-08-29 11:23 ` kbuild test robot
2019-08-21 19:08 ` [patch V2 03/38] posix-cpu-timers: Use common permission check in posix_cpu_timer_create() Thomas Gleixner
2019-08-21 23:49 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:08 ` [patch V2 04/38] posix-cpu-timers: Provide quick sample function for itimer Thomas Gleixner
2019-08-22 12:13 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:08 ` [patch V2 05/38] itimers: Use quick sample function Thomas Gleixner
2019-08-22 12:15 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-29 23:47 ` kbuild test robot
2019-08-30 6:01 ` Thomas Gleixner
2019-08-21 19:08 ` [patch V2 06/38] posix-cpu-timers: Sample directly in timer check Thomas Gleixner
2019-08-22 12:30 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:08 ` [patch V2 07/38] posix-cpu-timers: Rename thread_group_cputimer() and make it static Thomas Gleixner
2019-08-22 12:41 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:08 ` [patch V2 08/38] posix-cpu-timers: Consolidate thread group sample code Thomas Gleixner
2019-08-22 13:49 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:08 ` [patch V2 09/38] posix-cpu-timers: Use clock ID in posix_cpu_timer_set() Thomas Gleixner
2019-08-22 13:58 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:08 ` [patch V2 10/38] posix-cpu-timers: Use clock ID in posix_cpu_timer_get() Thomas Gleixner
2019-08-22 14:07 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:08 ` [patch V2 11/38] posix-cpu-timers: Use clock ID in posix_cpu_timer_rearm() Thomas Gleixner
2019-08-22 14:12 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:08 ` [patch V2 12/38] posix-cpu-timers: Remove pointless return value check Thomas Gleixner
2019-08-22 14:15 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 13/38] posix-cpu-timers: Simplify sample functions Thomas Gleixner
2019-08-22 14:20 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 14/38] posix-cpu-timers: Get rid of pointer indirection Thomas Gleixner
2019-08-22 14:41 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 15/38] posix-cpu-timers: Sample task times once in expiry check Thomas Gleixner
2019-08-22 15:00 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 16/38] posix-cpu-timers: Move prof/virt_ticks into caller Thomas Gleixner
2019-08-22 15:05 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 17/38] posix-cpu-timers: Create a container struct Thomas Gleixner
2019-08-22 15:32 ` Frederic Weisbecker
2019-08-23 15:34 ` Thomas Gleixner
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 19/38] posix-cpu-timers: Move expiry cache into struct posix_cputimers Thomas Gleixner
2019-08-22 16:29 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 20/38] posix-cpu-timers: Provide array based access to expiry cache Thomas Gleixner
2019-08-23 17:33 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 21/38] posix-cpu-timers: Simplify timer queueing Thomas Gleixner
2019-08-23 17:51 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 22/38] posix-cpu-timers: Simplify set_process_cpu_timer() Thomas Gleixner
2019-08-23 18:00 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 23/38] posix-cpu-timers: Switch check_*_timers() to array cache Thomas Gleixner
2019-08-23 18:13 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 24/38] posix-cpu-timers: Remove the odd field rename defines Thomas Gleixner
2019-08-23 18:36 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 25/38] posix-cpu-timers: Provide array based sample functions Thomas Gleixner
2019-08-23 22:08 ` Frederic Weisbecker
2019-08-28 10:16 ` tip-bot2 for Thomas Gleixner [this message]
2019-08-21 19:09 ` [patch V2 26/38] posix-cpu-timers: Make expiry checks array based Thomas Gleixner
2019-08-23 22:44 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 27/38] posix-cpu-timers: Remove cputime_expires Thomas Gleixner
2019-08-23 22:50 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 28/38] posix-cpu-timers: Restructure expiry array Thomas Gleixner
2019-08-26 16:32 ` Frederic Weisbecker
2019-08-26 18:16 ` Thomas Gleixner
2019-08-26 18:22 ` [patch V3 " Thomas Gleixner
2019-08-26 19:45 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-26 21:06 ` [patch V2 28/38] " Frederic Weisbecker
2019-08-26 21:46 ` Thomas Gleixner
2019-08-21 19:09 ` [patch V2 29/38] posix-cpu-timers: Switch thread group sampling to array Thomas Gleixner
2019-08-26 21:12 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 30/38] posix-cpu-timers: Respect INFINITY for hard RTTIME limit Thomas Gleixner
2019-08-26 21:19 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 31/38] rlimit: Rewrite non-sensical RLIMIT_CPU comment Thomas Gleixner
2019-08-26 21:41 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 32/38] posix-cpu-timers: Get rid of zero checks Thomas Gleixner
2019-08-26 21:57 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 33/38] posix-cpu-timers: Consolidate timer expiry further Thomas Gleixner
2019-08-26 22:29 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 34/38] posix-cpu-timers: Get rid of 64bit divisions Thomas Gleixner
2019-08-26 22:51 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 35/38] posix-cpu-timers: Remove pointless comparisons Thomas Gleixner
2019-08-26 22:59 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 36/38] posix-cpu-timers: Deduplicate rlimit handling Thomas Gleixner
2019-08-26 23:13 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 37/38] posix-cpu-timers: Move state tracking to struct posix_cputimers Thomas Gleixner
2019-08-26 23:28 ` Frederic Weisbecker
2019-08-26 23:33 ` Thomas Gleixner
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-21 19:09 ` [patch V2 38/38] posix-cpu-timers: Utilize timerqueue for storage Thomas Gleixner
2019-08-27 0:48 ` Frederic Weisbecker
2019-08-27 6:08 ` Thomas Gleixner
2019-08-27 13:17 ` Frederic Weisbecker
2019-08-27 13:46 ` Thomas Gleixner
2019-08-27 19:31 ` [patch V3 " Thomas Gleixner
2019-08-27 22:23 ` Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
2019-08-22 0:54 ` [patch V2 00/38] posix-cpu-timers: Cleanup and consolidation Christoph Hellwig
2019-08-22 1:02 ` Frederic Weisbecker
2019-08-22 1:02 ` Christoph Hellwig
[not found] ` <20190821192920.909530418@linutronix.de>
2019-08-22 16:06 ` [patch V2 18/38] sched: Move struct task_cputime to types.h Frederic Weisbecker
2019-08-28 10:16 ` [tip: timers/core] " tip-bot2 for Thomas Gleixner
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