From: Frederic Weisbecker <frederic@kernel.org>
To: LKML <linux-kernel@vger.kernel.org>
Cc: "Christophe Leroy (CS GROUP)" <chleroy@kernel.org>,
"Rafael J. Wysocki" <rafael@kernel.org>,
Alexander Gordeev <agordeev@linux.ibm.com>,
Anna-Maria Behnsen <anna-maria@linutronix.de>,
Ben Segall <bsegall@google.com>,
Boqun Feng <boqun.feng@gmail.com>,
Christian Borntraeger <borntraeger@linux.ibm.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Heiko Carstens <hca@linux.ibm.com>,
Ingo Molnar <mingo@redhat.com>,
Jan Kiszka <jan.kiszka@siemens.com>,
Joel Fernandes <joelagnelf@nvidia.com>,
Juri Lelli <juri.lelli@redhat.com>,
Kieran Bingham <kbingham@kernel.org>,
Madhavan Srinivasan <maddy@linux.ibm.com>,
Mel Gorman <mgorman@suse.de>,
Michael Ellerman <mpe@ellerman.id.au>,
Neeraj Upadhyay <neeraj.upadhyay@kernel.org>,
Nicholas Piggin <npiggin@gmail.com>,
"Paul E . McKenney" <paulmck@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Steven Rostedt <rostedt@goodmis.org>,
Sven Schnelle <svens@linux.ibm.com>,
Thomas Gleixner <tglx@linutronix.de>,
Uladzislau Rezki <urezki@gmail.com>,
Valentin Schneider <vschneid@redhat.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Viresh Kumar <viresh.kumar@linaro.org>,
Xin Zhao <jackzxcui1989@163.com>,
linux-pm@vger.kernel.org, linux-s390@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org,
Shrikanth Hegde <sshegde@linux.ibm.com>
Subject: Re: [PATCH 12/15] tick/sched: Consolidate idle time fetching APIs
Date: Fri, 6 Feb 2026 23:35:14 +0100 [thread overview]
Message-ID: <aYZsol2OIzMxoJXv@pavilion.home> (raw)
In-Reply-To: <20260206142245.58987-13-frederic@kernel.org>
Le Fri, Feb 06, 2026 at 03:22:42PM +0100, Frederic Weisbecker a écrit :
> +static u64 get_cpu_sleep_time_us(int cpu, enum cpu_usage_stat idx,
> + bool compute_delta, u64 *last_update_time)
> +{
> + ktime_t now = ktime_get();
> + u64 res;
> +
> + if (vtime_generic_enabled_cpu(cpu))
> + res = kcpustat_field(idx, cpu);
> + else
> + res = kcpustat_field_dyntick(cpu, idx, compute_delta, now);
> +
> + do_div(res, NSEC_PER_USEC);
> +
> + if (last_update_time)
> + *last_update_time = res;
Urgh, this should be *last_update_time = ktime_to_us(now)
--
Frederic Weisbecker
SUSE Labs
next prev parent reply other threads:[~2026-02-06 22:35 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-06 14:22 [PATCH 00/15 v2] tick/sched: Refactor idle cputime accounting Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 01/15] sched/idle: Handle offlining first in idle loop Frederic Weisbecker
2026-02-18 18:22 ` Shrikanth Hegde
2026-02-06 14:22 ` [PATCH 02/15] sched/cputime: Remove superfluous and error prone kcpustat_field() parameter Frederic Weisbecker
2026-02-18 18:25 ` Shrikanth Hegde
2026-02-06 14:22 ` [PATCH 03/15] sched/cputime: Correctly support generic vtime idle time Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 04/15] powerpc/time: Prepare to stop elapsing in dynticks-idle Frederic Weisbecker
2026-02-19 18:30 ` Shrikanth Hegde
2026-02-24 15:41 ` Christophe Leroy (CS GROUP)
2026-02-25 7:46 ` Shrikanth Hegde
2026-02-25 9:45 ` Christophe Leroy (CS GROUP)
2026-02-25 10:34 ` Shrikanth Hegde
2026-02-25 11:14 ` Christophe Leroy (CS GROUP)
2026-02-25 13:33 ` Shrikanth Hegde
2026-02-25 13:54 ` Christophe Leroy (CS GROUP)
2026-02-25 17:47 ` Shrikanth Hegde
2026-02-25 17:59 ` Christophe Leroy (CS GROUP)
2026-02-26 4:06 ` Shrikanth Hegde
2026-02-26 7:32 ` Christophe Leroy (CS GROUP)
2026-02-26 12:57 ` Shrikanth Hegde
2026-02-06 14:22 ` [PATCH 05/15] s390/time: " Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 06/15] tick/sched: Unify idle cputime accounting Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 07/15] cpufreq: ondemand: Simplify idle cputime granularity test Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 08/15] tick/sched: Remove nohz disabled special case in cputime fetch Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 09/15] tick/sched: Move dyntick-idle cputime accounting to cputime code Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 10/15] tick/sched: Remove unused fields Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 11/15] tick/sched: Account tickless idle cputime only when tick is stopped Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 12/15] tick/sched: Consolidate idle time fetching APIs Frederic Weisbecker
2026-02-06 22:35 ` Frederic Weisbecker [this message]
2026-02-06 14:22 ` [PATCH 13/15] sched/cputime: Provide get_cpu_[idle|iowait]_time_us() off-case Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 14/15] sched/cputime: Handle idle irqtime gracefully Frederic Weisbecker
2026-03-03 11:11 ` Shrikanth Hegde
2026-03-20 14:32 ` Frederic Weisbecker
2026-02-06 14:22 ` [PATCH 15/15] sched/cputime: Handle dyntick-idle steal time correctly Frederic Weisbecker
2026-03-03 11:17 ` Shrikanth Hegde
2026-03-24 14:53 ` Frederic Weisbecker
2026-02-11 13:43 ` [PATCH 00/15 v2] tick/sched: Refactor idle cputime accounting Shrikanth Hegde
2026-02-11 17:06 ` Frederic Weisbecker
2026-02-12 7:02 ` Shrikanth Hegde
2026-02-18 18:11 ` Shrikanth Hegde
-- strict thread matches above, loose matches on Subject: below --
2026-01-16 14:51 [PATCH 00/15] " Frederic Weisbecker
2026-01-16 14:52 ` [PATCH 12/15] tick/sched: Consolidate idle time fetching APIs Frederic Weisbecker
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