Re: "use register arguments" option enabled.

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Ignacio Vazquez-Abrams wrote:
On Tue, 2005-05-17 at 10:45 +1200, Mike Honeyfield wrote:

On 5/17/05, Ignacio Vazquez-Abrams <ivazquez@xxxxxxxxxxxx> wrote:

On Tue, 2005-05-17 at 10:29 +1200, Mike Honeyfield wrote:

I am just wondering the reasoning behind having the experimental
option "Use register arguments" on in the kernel config.

It has caused some issues for me, have since fixed it, but was
wondering why an experimental feature that could/can break the ABI for
3rd party binary only modules would be enabled?

Speed. Pushing data onto the stack takes longer than just shoving it into a register.


So the speed improvement is enough to justify this?


Even a 2 clock cycle delay happening hundreds of thousands or even
millions of times a second builds up.

Isn't using system memory much longer than 2 clock cycles?

Warren

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