From: Mike Galbraith <efault@gmx.de>
To: Steven Sistare <steven.sistare@oracle.com>,
Rohit Jain <rohit.k.jain@oracle.com>,
linux-kernel@vger.kernel.org
Cc: peterz@infradead.org, mingo@redhat.com, joelaf@google.com,
jbacik@fb.com, riel@redhat.com, juri.lelli@redhat.com,
dhaval.giani@oracle.com
Subject: Re: [RFC 1/2] sched: reduce migration cost between faster caches for idle_balance
Date: Thu, 15 Feb 2018 19:39:28 +0100 [thread overview]
Message-ID: <1518719968.13961.32.camel@gmx.de> (raw)
In-Reply-To: <e9591680-4278-5344-6876-d16e8f9c53c4@oracle.com>
On Thu, 2018-02-15 at 13:21 -0500, Steven Sistare wrote:
> On 2/15/2018 1:07 PM, Mike Galbraith wrote:
>
> >> Can you provide more details on the sysbench oltp test that motivated you
> >> to add sysctl_sched_migration_cost to idle_balance, so Rohit can re-test it?
> >
> > The problem at that time was the cycle overhead of entering that LB
> > path at high frequency. Dirt simple.
>
> I get that. I meant please provide details on test parameters and config if
> you remember them.
Nope. I doubt it would be relevant to here/now anyway.
-Mike
next prev parent reply other threads:[~2018-02-15 18:40 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-08 22:19 [RFC 0/2] sched: Make idle_balance smarter about topology Rohit Jain
2018-02-08 22:19 ` [RFC 1/2] sched: reduce migration cost between faster caches for idle_balance Rohit Jain
2018-02-09 3:42 ` Mike Galbraith
2018-02-09 16:08 ` Steven Sistare
2018-02-10 6:37 ` Mike Galbraith
2018-02-15 16:35 ` Steven Sistare
2018-02-15 18:07 ` Mike Galbraith
2018-02-15 18:21 ` Steven Sistare
2018-02-15 18:39 ` Mike Galbraith [this message]
2018-02-15 18:07 ` Rohit Jain
2018-02-16 4:53 ` Mike Galbraith
2018-02-08 22:19 ` [RFC 2/2] Introduce sysctl(s) for the migration costs Rohit Jain
2018-02-09 3:54 ` Mike Galbraith
2018-02-09 16:10 ` Steven Sistare
2018-02-09 17:08 ` Mike Galbraith
2018-02-09 17:33 ` Steven Sistare
2018-02-09 17:50 ` Mike Galbraith
2018-02-12 15:28 ` Peter Zijlstra
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