[Nottingham] The quickest distro in NLUG
dean at deansas.org
Thu Sep 14 17:00:49 BST 2006
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Martin Garton wrote:
> On Thu, 2006-09-14 at 16:07 +0100, Roger Light wrote:
>> On 14/09/06, Martin Garton <martin at stupids.org> wrote:
>>> On Thu, 2006-09-14 at 11:09 +0100, Martin wrote:
>>>> Kustom Kompiled Kernels Is Kwick whatever distros...?
>>> In my experience, custom compiled kernels don't make much difference on
>>> most hardware except in corner cases. I believe this is partly down to
>>> the way the kernel is coded. (more like using C as a portable assembler)
>> The advantage of custom compiled kernels is just that - you get to
>> tweak the features to your needs as well as to see what is up and
> Yes I agree, but I was speaking from a purely performance perspective.
> Are there any features (apart from the debugging options) that make any
> real performance difference?
> I know that until recently running SMP on UP was slower due to
> unneccesary locking, but I believe that's been changed and the
> difference is now negligible.
> Some folks say preempt makes a lot of difference, but I'm not convinced.
> (lower latency != faster machine)
> Compiling for the right architecture makes a difference, but pretty much
> all x86 users are running i686 class machines now anyway.
With recent kernels this shouldn't really make much difference
apparently as it can detect optimisations at runtime, Ubuntu have pretty
much scrapped CPU specific kernels  only having a 386 kernel (which
is kept for some chipset compatibility) and a generic kernel for other
CPUs (including SMP).
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