Messages in this thread |  | | Date | Wed, 08 Nov 2000 10:46:25 -0800 | From | Reto Baettig <> | Subject | Re: fpu now a must in kernel |
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When you add it to the task switcher, it takes away a lot of cpu cycles during each task switch and slows down your system. I think this was the main idea behind _not_ saving those registers. IMHO, it does not make sense to generally save these registers when nobody else but your driver uses them.
Good luck!
Reto
david wrote: > > hi i need fast fpu in the kernel for my lexos work > so how am i going to do it on the i386 > > 1 . can i add some save / restore code to the task swicher ( the right > way ) > so when it switchs from user to kernel task its saves the fpu state > ? > > 2 . put the save / restore code in my code (NOT! GOOD! i do not wont to > do it this way it is not the right way) > > so i have to use fpu in the kernel so its just how am i going to do it ? > > thank you > > David Rundle <sector2@ihug.co.nz> > > - > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > Please read the FAQ at http://www.tux.org/lkml/ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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