On Fri, May 31, 2019 at 12:52:32PM +0100, Wilco Dijkstra wrote:
> With -mcpu=generic the function alignment is currently 8, however almost all
> supported cores prefer 16 or higher, so increase the default to 16:12.
> This gives ~0.2% performance increase on SPECINT2017, while codesize is 0.12%
> l
ping
With -mcpu=generic the function alignment is currently 8, however almost all
supported cores prefer 16 or higher, so increase the default to 16:12.
This gives ~0.2% performance increase on SPECINT2017, while codesize is 0.12%
larger.
ChangeLog:
2019-05-31 Wilco Dijkstra
Hi Steve,
> I have no objection to the change but could the commit message and/or
> comments be expanded to explain the ':12' part of this value. I
> couldn't find an explanation for it in the code and I don't understand
> what it does.
See
https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.ht
On Fri, 2019-05-31 at 11:52 +, Wilco Dijkstra wrote:
> With -mcpu=generic the function alignment is currently 8, however almost all
> supported cores prefer 16 or higher, so increase the default to 16:12.
> This gives ~0.2% performance increase on SPECINT2017, while codesize is 0.12%
> larger.
