From: Matt Fleming <matt@codeblueprint.co.uk>
To: "Suthikulpanit, Suravee" <Suravee.Suthikulpanit@amd.com>
Cc: Mel Gorman <mgorman@techsingularity.net>,
Peter Zijlstra <peterz@infradead.org>,
"Lendacky, Thomas" <Thomas.Lendacky@amd.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH] sched/topology: Improve load balancing on AMD EPYC
Date: Fri, 28 Jun 2019 16:15:08 +0100 [thread overview]
Message-ID: <20190628151508.GB6909@codeblueprint.co.uk> (raw)
In-Reply-To: <989944bc-6c3a-43b5-4f95-0bdfcc6d6c29@amd.com>
On Wed, 26 Jun, at 09:18:01PM, Suthikulpanit, Suravee wrote:
>
> We use 16 to designate 1-hop latency (for different node within the same socket).
> For across-socket access, since the latency is greater, we set the latency to 32
> (twice the latency of 1-hop) not aware of the RECLAIM_DISTANCE at the time.
I guess the question is: Is the memory latency of a remote node 1 hop
away 1.6x the local node latency?
next prev parent reply other threads:[~2019-06-28 15:15 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-05 15:59 [PATCH] sched/topology: Improve load balancing on AMD EPYC Matt Fleming
2019-06-05 18:00 ` Peter Zijlstra
2019-06-10 21:26 ` Matt Fleming
2019-06-11 17:22 ` Lendacky, Thomas
2019-06-18 10:43 ` Matt Fleming
2019-06-18 12:33 ` Peter Zijlstra
2019-06-19 21:34 ` Matt Fleming
2019-06-24 14:24 ` Mel Gorman
2019-06-26 21:18 ` Suthikulpanit, Suravee
2019-06-28 15:15 ` Matt Fleming [this message]
2019-07-22 14:11 ` Suthikulpanit, Suravee
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