RFC: Optimizing for 386
William Cohen
wcohen at redhat.com
Wed Jan 19 17:37:56 UTC 2005
Peter Backlund wrote:
> Has anyone been testing -Os (optimize for size) instead of -O2 on any
> greater scale? Fitting as much as possible in L1-cache is a great way to
> obtain high performance.
>
> /Peter Backlund
>
>
The kernels in FC are currently compiled with -Os.
I worked with some North Carolina State University studenst testing
something like this out this fall on Mozilla. They found some
improvement in performance (reduction in L1 cache and instruction TLB
misses). I have put the pdf report at:
http://people.redhat.com/wcohen/ncsu2004/Space%20Optimizations.pdf
-Will
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