Re: [PATCH] deinline sleep/delay functions

Vojtech Pavlik
2005-07-01T07:53:08Z

On Thu, Jun 30, 2005 at 08:52:25AM +0300, Denis Vlasenko wrote:
> Hi Andrew,
>
> Optimizing delay functions for speed is utterly pointless.
>
> This patch turns ssleep(n), mdelay(n), udelay(n) and ndelay(n)
> into functions, thus they generate the smallest possible code
> at the callsite. Previously they were more or less inlined.

Optimizing mdelay() and udelay() for speed is pointless, but optimizing
ndelay() makes a lot of sense - if the setup time (call, etc) of the
delay is large, the delay time will be off by many percent.

--
Vojtech Pavlik
SuSE Labs, SuSE CR