From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Waiman Long <Waiman.Long@hpe.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Peter Zijlstra <peterz@infradead.org>,
linux-kernel@vger.kernel.org, Yuyang Du <yuyang.du@intel.com>,
Paul Turner <pjt@google.com>, Ben Segall <bsegall@google.com>,
Morten Rasmussen <morten.rasmussen@arm.com>,
Scott J Norton <scott.norton@hpe.com>,
Douglas Hatch <doug.hatch@hpe.com>
Subject: Re: [PATCH v2 2/3] sched/fair: Move hot load_avg into its own cacheline
Date: Thu, 03 Dec 2015 05:32:28 +0100 [thread overview]
Message-ID: <1449117148.3314.5.camel@gmail.com> (raw)
In-Reply-To: <1449081710-20185-3-git-send-email-Waiman.Long@hpe.com>
On Wed, 2015-12-02 at 13:41 -0500, Waiman Long wrote:
> By doing so, the perf profile became:
>
> 9.44% 0.00% java [kernel.vmlinux] [k] smp_apic_timer_interrupt
> 8.74% 0.01% java [kernel.vmlinux] [k] hrtimer_interrupt
> 7.83% 0.03% java [kernel.vmlinux] [k] tick_sched_timer
> 7.74% 0.00% java [kernel.vmlinux] [k] update_process_times
> 7.27% 0.03% java [kernel.vmlinux] [k] scheduler_tick
> 5.94% 1.74% java [kernel.vmlinux] [k] task_tick_fair
> 4.15% 3.92% java [kernel.vmlinux] [k] update_cfs_shares
>
> The %cpu time is still pretty high, but it is better than before.
Is that with the box booted skew_tick=1?
-Mike
next prev parent reply other threads:[~2015-12-03 4:32 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-02 18:41 [PATCH v2 0/3] sched/fair: Reduce contention on tg's load_avg Waiman Long
2015-12-02 18:41 ` [PATCH v2 1/3] sched/fair: Avoid redundant idle_cpu() call in update_sg_lb_stats() Waiman Long
2015-12-02 18:41 ` [PATCH v2 2/3] sched/fair: Move hot load_avg into its own cacheline Waiman Long
2015-12-02 20:02 ` bsegall
2015-12-03 19:26 ` Waiman Long
2015-12-03 19:41 ` bsegall
2015-12-03 4:32 ` Mike Galbraith [this message]
2015-12-03 19:34 ` Waiman Long
2015-12-04 2:07 ` Mike Galbraith
2015-12-04 20:19 ` Waiman Long
2015-12-03 10:56 ` Peter Zijlstra
2015-12-03 19:38 ` Waiman Long
2015-12-03 11:12 ` Peter Zijlstra
2015-12-03 17:56 ` bsegall
2015-12-03 18:17 ` Peter Zijlstra
2015-12-03 18:23 ` bsegall
2015-12-03 19:56 ` Waiman Long
2015-12-03 20:03 ` Peter Zijlstra
2015-12-04 11:57 ` [tip:sched/core] sched/fair: Move the cache-hot 'load_avg' variable " tip-bot for Waiman Long
2015-12-02 18:41 ` [PATCH v2 3/3] sched/fair: Disable tg load_avg update for root_task_group Waiman Long
2015-12-02 19:55 ` bsegall
2015-12-04 11:58 ` [tip:sched/core] sched/fair: Disable the task group load_avg update for the root_task_group tip-bot for Waiman Long
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