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Date: Thu, 24 Sep 2020 10:43:12 -0700 From: Tim Chen <tim.c.chen@...ux.intel.com> To: Phil Auld <pauld@...hat.com> Cc: Vincent Guittot <vincent.guittot@...aro.org>, "Li, Aubrey" <aubrey.li@...ux.intel.com>, Mel Gorman <mgorman@...e.de>, Ingo Molnar <mingo@...hat.com>, Peter Zijlstra <peterz@...radead.org>, Juri Lelli <juri.lelli@...hat.com>, Dietmar Eggemann <dietmar.eggemann@....com>, Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>, Valentin Schneider <valentin.schneider@....com>, linux-kernel <linux-kernel@...r.kernel.org>, Qais Yousef <qais.yousef@....com>, Jiang Biao <benbjiang@...il.com> Subject: Re: [RFC PATCH v2] sched/fair: select idle cpu from idle cpumask in sched domain On 9/24/20 10:13 AM, Phil Auld wrote: > On Thu, Sep 24, 2020 at 09:37:33AM -0700 Tim Chen wrote: >> >> >> On 9/22/20 12:14 AM, Vincent Guittot wrote: >> >>>> >>>>>> >>>>>> And a quick test with hackbench on my octo cores arm64 gives for 12 >> >> Vincent, >> >> Is it octo (=10) or octa (=8) cores on a single socket for your system? > > In what Romance language does octo mean 10? :) > Got confused by october, the tenth month. :) Tim > >> The L2 is per core or there are multiple L2s shared among groups of cores? >> >> Wonder if placing the threads within a L2 or not within >> an L2 could cause differences seen with Aubrey's test. >> >> Tim >> >
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