Re: [PATCH] sched/topology: Improve load balancing on AMD EPYC

[Suthikulpanit, Suravee]

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