Re: [PATCH] deinline sleep/delay functions

From: Vojtech Pavlik (vojtech_at_suse.cz)
Date: 07/01/05

  • Next message: Vojtech Pavlik: "Re: [PATCH] deinline sleep/delay functions" 
    Date:	Fri, 1 Jul 2005 09:53:04 +0200
To: Denis Vlasenko <vda@ilport.com.ua>

    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
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  • Next message: Vojtech Pavlik: "Re: [PATCH] deinline sleep/delay functions"