[PATCH] [AArch64] Refines the Cortex-A57 Machine Model

[Dave Estes]

Jianging,

I did some more runs and I've got mixed news. Seems I've been a bit more 
focused on this new model's gains over -mcpu=generic rather than using 
the existing A57 model as a baseline. The reason was primarily because 
our earlier testing showed the existing A57 model performing very 
poorly. However, I re-did my runs using the existing A57 model as a 
baseline and it actually performs really well. So that's the good news. 
The mediocre news is that increasing the accuracy of the model has 
merely shifted performance around and not actually increased it.

With that said, I'm going to do some more experimenting and then I'm 
going to try to model the in-order and out-of-order resources 
accordingly in a hope that I can capture the best gains. It might take a 
bit of time, but I'll hopefully replace this patch with those efforts.

In the meantime, I might have some questions for you guys but I'll take 
that chatter off-list.

-Dave

-- 
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum