Re: RT patch acceptance

David Lang
2005-06-01T02:19:39Z

On Wed, 1 Jun 2005, Andrea Arcangeli wrote:

> On Tue, May 31, 2005 at 01:14:40PM -0700, David Lang wrote:
>> distros already throw >20% performance improvements on the floor to
>
> hmm, where does that >20% number come from?
>

missed options for optimizing for the specific CPU you have. it's not as
bad as it used to be when everything was compiled for 386, but it's still
a significant benifit to recompile with no changes in options except for
the CPU type.

I haven't measured it recently, but in the 2.4.17/2.6.0 timeframe I was
seeing >30% for optimized kernels vs stock ones so I don't think the 20%
figure is unreasonable.

David Lang

--
There are two ways of constructing a software design. One way is to make it so simple that there are obviously no deficiencies. And the other way is to make it so complicated that there are no obvious deficiencies.
-- C.A.R. Hoare