From: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Michael Neuling <mikey@neuling.org>,
Matt Fleming <matt@codeblueprint.co.uk>,
mingo@kernel.org, linux-kernel@vger.kernel.org, clm@fb.com,
mgalbraith@suse.de, tglx@linutronix.de, fweisbec@gmail.com,
anton@samba.org, oliver <oohall@gmail.com>,
"Shreyas B. Prabhu" <shreyas@linux.vnet.ibm.com>
Subject: Re: [RFC][PATCH 4/7] sched: Replace sd_busy/nr_busy_cpus with sched_domain_shared
Date: Tue, 17 May 2016 16:22:04 +0530 [thread overview]
Message-ID: <20160517105204.GA9986@linux.vnet.ibm.com> (raw)
In-Reply-To: <20160517102007.GI3205@twins.programming.kicks-ass.net>
>
> Maybe even something like so; which would make Power <= 6 use the
> default topology and result in a shared LLC between the on package cores
> etc..
>
> Power7 is then special for not having a shared L3 but having the
> asymmetric SMT thing and Power8 again gains the shared L3 while
> retaining the asymmetric SMT stuff.
Asymmetric SMT is only for Power 7. Its not enabled for Power 8.
On Power8, if there are only 2 active threads assume thread 0 and thread
4 running in smt 8 mode, it would internally run as if running in smt 2
mode without any scheduler tweaks. (This is unlike power 7).
--
Thanks and Regards
Srikar Dronamraju
next prev parent reply other threads:[~2016-05-17 10:52 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-09 10:48 [RFC][PATCH 0/7] sched: select_idle_siblings rewrite Peter Zijlstra
2016-05-09 10:48 ` [RFC][PATCH 1/7] sched: Remove unused @cpu argument from destroy_sched_domain*() Peter Zijlstra
2016-05-09 10:48 ` [RFC][PATCH 2/7] sched: Restructure destroy_sched_domain() Peter Zijlstra
2016-05-09 14:46 ` Peter Zijlstra
2016-05-09 10:48 ` [RFC][PATCH 3/7] sched: Introduce struct sched_domain_shared Peter Zijlstra
2016-05-09 10:48 ` [RFC][PATCH 4/7] sched: Replace sd_busy/nr_busy_cpus with sched_domain_shared Peter Zijlstra
2016-05-11 11:55 ` Matt Fleming
2016-05-11 12:33 ` Peter Zijlstra
2016-05-11 18:11 ` Peter Zijlstra
2016-05-11 18:24 ` Peter Zijlstra
2016-05-12 2:05 ` Michael Neuling
2016-05-12 5:07 ` Peter Zijlstra
2016-05-12 11:07 ` Michael Neuling
2016-05-12 11:33 ` Peter Zijlstra
2016-05-13 0:12 ` Michael Neuling
2016-05-16 14:00 ` Peter Zijlstra
2016-05-17 10:20 ` Peter Zijlstra
2016-05-17 10:52 ` Srikar Dronamraju [this message]
2016-05-17 11:15 ` Peter Zijlstra
2016-05-11 17:37 ` Peter Zijlstra
2016-05-11 18:04 ` Matt Fleming
2016-05-16 15:31 ` Dietmar Eggemann
2016-05-16 17:02 ` Peter Zijlstra
2016-05-16 17:26 ` Dietmar Eggemann
2016-05-09 10:48 ` [RFC][PATCH 5/7] sched: Rewrite select_idle_siblings() Peter Zijlstra
2016-05-10 21:05 ` Yuyang Du
2016-05-11 7:00 ` Peter Zijlstra
2016-05-10 23:42 ` Yuyang Du
2016-05-11 7:43 ` Mike Galbraith
2016-05-09 10:48 ` [RFC][PATCH 6/7] sched: Optimize SCHED_SMT Peter Zijlstra
2016-05-09 10:48 ` [RFC][PATCH 7/7] sched: debug muck -- not for merging Peter Zijlstra
2016-05-10 0:50 ` [RFC][PATCH 0/7] sched: select_idle_siblings rewrite Chris Mason
2016-05-11 14:19 ` Chris Mason
2016-05-18 5:51 ` [RFC][PATCH 8/7] sched/fair: Use utilization distance to filter affine sync wakeups Mike Galbraith
2016-05-19 21:43 ` Rik van Riel
2016-05-20 2:52 ` Mike Galbraith
2016-05-25 14:51 ` [RFC][PATCH 0/7] sched: select_idle_siblings rewrite Chris Mason
2016-05-25 16:24 ` Peter Zijlstra
2016-05-25 17:11 ` Chris Mason
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