Dear Arthur, dear Timothy,
Am Donnerstag, den 02.03.2017, 13:38 -0600 schrieb Timothy Pearson:
On 03/02/2017 01:30 PM, Arthur Heymans wrote:
Paul Menzel writes:
I think most of the time is spent in RAM initialization.
- Do board owners with similar amount of memory (independent of the board) have similar numbers?
- What are the ways to improve that? Is it possible? For example, can the modules be probed in parallel (if that isn’t done already)?
I'm not the right person to answer this since I don't know this code/hardware that well, but on modern Intel hardware native code uses the MRC cache to store dram training results and restore those on next boots (and resume from suspend) if no change in dimm configuration was detected.
Maybe something like this could also be applied here (or maybe it's already the case since it includes code to access spi flash)?
Yes, this is already implemented as an option, and it does a fairly decent job of reducing training overhead to almost nothing,
Interesting. What option is that?
Also, besides the file `s3nv` I don’t see anything else in CBFS. Where is the training data cached?
[…]
Thanks,
Paul