From: Dietmar Eggemann <dietmar.eggemann@arm.com>
To: Rik van Riel <riel@surriel.com>, Peter Zijlstra <peterz@infradead.org>
Cc: Paul Turner <pjt@google.com>,
"vincent.guittot" <vincent.guittot@linaro.org>,
kernel-team@fb.com,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"dietmar.eggeman" <dietmar.eggeman@arm.com>
Subject: Re: CFS flat runqueue proposal fixes/update
Date: Fri, 21 Aug 2020 19:53:27 +0200 [thread overview]
Message-ID: <7b6349fc-c4c1-9c32-6b8f-0a9b3d7fa93c@arm.com> (raw)
In-Reply-To: <ad2a59c680d361847f257cdae576dd479e6ab9ac.camel@surriel.com>
On 20.08.20 22:39, Rik van Riel wrote:
> On Thu, 2020-08-20 at 16:56 +0200, Dietmar Eggemann wrote:
[...]
> The issue happens with a flat runqueue, when t1 goes
> to sleep, but t2 and t3 continue running.
>
> We need to make sure the vruntime for t2 has not been
> advanced so far into the future that cgroup A is unable
> to get its fair share of CPU wihle t1 is sleeping.
Ah, these problems are related to the 'CFS flat runqueue' patch-set!
Misunderstanding om my side.
I somehow assumed that you wanted to say that these problems exist in
current mainline and could be solved with the patch-set plus some extra
functionality on top.
prev parent reply other threads:[~2020-08-21 17:53 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-31 7:42 Rik van Riel
2020-08-07 14:14 ` Dietmar Eggemann
2020-08-07 19:41 ` Rik van Riel
2020-08-20 14:56 ` Dietmar Eggemann
2020-08-20 20:39 ` Rik van Riel
2020-08-21 17:53 ` Dietmar Eggemann [this message]
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