Messages in this thread | | | From | "Oliver Henning" <> | Subject | Re: spin_unlock optimization | Date | Thu, 30 Dec 1999 04:06:04 +0100 |
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Hi Gabor,
well, not necessarily. If you would modify the spin_unlock asm sequence at boot time, there would be no performance loss. But self-modifying code is not very desirable, so...
Greetz, Oliver
> > Yes. Runtime option is not acceptable imho. movb $0,%0 can be fast but if > you need a conditional instruction to test if the fast version can be used > uses more and more cycles. > > -- > ---[ LGB/DC ]------------[ University Of Veszprém ]------[ Lénárt Gábor ]--- > "The truth is out there" "We're l{ea,i}ving together" "The future is dark." > ---[ 30/2270823 ]--------[ http://lgb.hal.vein.hu ]---------[ 87/477074 ] --- > finger lgb@hal2000.hal.vein.hu for more !LINUX! SMS : lgblgb@westel900.net
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