performance testing of UNWIND kernel option

[Rui Miguel Silva Seabra]

Em 08-03-2011 14:01, Gennady Kupava escreveu:
> Hi, list.
>
> Today I noticed the following change in SHR:
> http://git.openembedded.org/cgit.cgi/openembedded/commit/?id=1516588acd3c4b4dd4add71d06ab8ce0d1bafa02 (by Denis 'GNUtoo' Carikli<GNUtoo at no-log.org>) and decided to lmbench it.
>
> Here are results: http://www.bsdmn.com/lmbench/unwind_summary.txt
>
> You can see comparison of:
>
> 34def ->  kernel with CONFIG_FRAME_POINTER
> unwind ->  kernel with CONFIG_ARM_UNWIND
> default ->  for reference, old debugging kernel
>
> The unwind option provide clear benefit of 5%-10% in almost every area.
>
> Nice spot Denis!

It does feel faster!

OpenMoko Freerunner, probably the only "obsolete" phone that keeps 
getting better :)

Rui