Messages in this thread | | | From | "Suthikulpanit, Suravee" <> | Subject | Re: [PATCH] sched/topology: Improve load balancing on AMD EPYC | Date | Mon, 22 Jul 2019 14:11:12 +0000 |
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Matt
On 6/28/2019 10:15 AM, Matt Fleming wrote: > 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? >
Yes, remote node 1 hop is 1.6x the local node latency for AMD EPYC.
Suravee
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