From: Qing Wang <wangqing7171@gmail.com>
To: peterz@infradead.org
Cc: bsegall@google.com, davichazbh@gmail.com,
dietmar.eggemann@arm.com, juri.lelli@redhat.com,
kprateek.nayak@amd.com, linux-kernel@vger.kernel.org,
mgorman@suse.de, mingo@redhat.com, rostedt@goodmis.org,
tim.c.chen@linux.intel.com, vincent.guittot@linaro.org,
vschneid@redhat.com, wangqing7171@gmail.com, yu.c.chen@intel.com
Subject: Re: [PATCH v4] sched/fair: Replace random newidle_balance with Bresenham accumulator
Date: Fri, 30 Oct 2026 18:22:26 +0800 [thread overview]
Message-ID: <20261030102226.2501158-1-wangqing7171@gmail.com> (raw)
In-Reply-To: <20261030095630.GJ2668200@noisy.programming.kicks-ass.net>
On Fri, 30 Oct 2026 at 17:56, Peter Zijlstra <peterz@infradead.org> wrote:
> Funnily enough, treating this as an independent variable and using a
> random number works and 'fixes' the slope change problems.
Hi Peter,
I explained this in the v3 thread: on a slope change, carrying
newidle_window_pos over from the previous window only shifts the
first allowed balance in the new-slope window (512 calls) earlier or
later; subsequent balances are still uniformly spaced. So the
initial value can be anything — it doesn't matter.
--
Best regards,
Qing
next prev parent reply other threads:[~2026-10-30 10:22 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-30 9:19 Qing Wang
2026-10-30 9:46 ` K Prateek Nayak
2026-10-30 9:56 ` Peter Zijlstra
2026-10-30 10:22 ` Qing Wang [this message]
2026-10-30 10:39 ` Peter Zijlstra
2026-10-30 10:09 ` Qing Wang
2026-10-30 14:47 ` Kayra Cizmeci
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