Messages in this thread | | | Date | Fri, 1 Jul 2005 09:53:04 +0200 | From | Vojtech Pavlik <> | Subject | Re: [PATCH] deinline sleep/delay functions |
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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 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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