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Odroid XU4 Memcopy Slow on all Kernel 5.x 80MB/sec instead of 370+MB/sec

Description

Kernel 4.14.186 – Fast. http://ix.io/2qxh

Kernel 5.4 – Slow

Kernel 5.7 – Slow http://ix.io/2qpX

odroid forum site admin thinks DRAM controller config could have issues on kernel 5
https://forum.odroid.com/viewtopic.php?f=184&t=38774

Additional research…

this patch for dynaminc timings was added around kernel 5.3 https://lwn.net/Articles/787647/

we’re using it

Environment

None

Assignee

Lane Jennison

Reporter

Lane Jennison

Labels

Components

Fix versions

Priority

High
Configure