From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Byungchul Park <byungchul.park@lge.com>
Cc: Morten Rasmussen <morten.rasmussen@arm.com>,
mingo@kernel.org, peterz@infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2] sched: let __sched_period() use rq's nr_running
Date: Mon, 13 Jul 2015 09:07:01 +0200 [thread overview]
Message-ID: <1436771221.6576.60.camel@gmail.com> (raw)
In-Reply-To: <20150713005639.GH31287@byungchulpark-X58A-UD3R>
On Mon, 2015-07-13 at 09:56 +0900, Byungchul Park wrote:
> and i agree with that it makes latency increase for non-grouped tasks.
It's not only a latency hit for the root group, it's across the board.
I suspect an overloaded group foo/bar/baz would prefer small slices over
a large wait as well. I certainly wouldn't want my root group taking the
potentially huge hits that come with stretching period to accommodate an
arbitrarily overloaded /foo/bar/baz.
-Mike
next prev parent reply other threads:[~2015-07-13 7:07 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-10 8:11 [PATCH v2] sched: let __sched_period() use rq's nr_running byungchul.park
2015-07-10 13:31 ` Morten Rasmussen
2015-07-13 0:56 ` Byungchul Park
2015-07-13 7:07 ` Mike Galbraith [this message]
2015-07-13 8:29 ` Byungchul Park
2015-07-13 10:22 ` Mike Galbraith
2015-07-13 11:07 ` Byungchul Park
2015-07-13 12:30 ` Mike Galbraith
2015-07-14 2:07 ` Byungchul Park
2015-07-14 2:30 ` Mike Galbraith
2015-07-13 8:26 ` Peter Zijlstra
2015-07-13 9:25 ` Byungchul Park
2015-07-14 2:26 ` Byungchul Park
2015-07-14 9:26 ` Byungchul Park
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