* do u get better performance from optimizing the code
@ 2002-05-15 13:32 Kingsley Foreman
2002-05-15 13:52 ` Måns Rullgård
0 siblings, 1 reply; 2+ messages in thread
From: Kingsley Foreman @ 2002-05-15 13:32 UTC (permalink / raw)
To: Kernel Mailing List
just out of curiosity will the kernel perform better if you
change the optimizations using C++ eg use -O9 or something during compile
Kingsley
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: do u get better performance from optimizing the code
2002-05-15 13:32 do u get better performance from optimizing the code Kingsley Foreman
@ 2002-05-15 13:52 ` Måns Rullgård
0 siblings, 0 replies; 2+ messages in thread
From: Måns Rullgård @ 2002-05-15 13:52 UTC (permalink / raw)
To: Kingsley Foreman; +Cc: Kernel Mailing List
"Kingsley Foreman" <kingsley@uglypunk.com> writes:
> just out of curiosity will the kernel perform better if you
> change the optimizations using C++ eg use -O9 or something during compile
The kernel is written in C, so don't use a C++ compiler. GCC has four
levels of optimization:
0 = nothing
1 = -O, simple things
2 = some more
3 = function inlining etc.
Anyting >3 is treated as 3.
--
Måns Rullgård
mru@users.sf.net
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