| Date | Wed, 2 May 2001 12:52:43 +0200 | From | Andi Kleen <> | Subject | Re: X15 alpha release: as fast as TUX but in user space (fwd) |
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[sorry for the late answer -- i was involuntarily offline for a few days]
On Sat, Apr 28, 2001 at 04:56:27PM -0600, Richard Gooch wrote: > Whatever happened to that hack that was discussed a year or two ago? > The one where (also on IA32) a magic page was set up by the kernel > containing code for fast system calls, and the kernel would write > calibation information to that magic page. The code written there > would use the TSC in conjunction with that calibration data. > > There was much discussion about this idea, even Linus was keen on > it. But IIRC, nothing ever happened.
It's already implemented in the x86-64 port, thanks to Andrea Arcangelli.
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