Messages in this thread |  | | Date | Mon, 18 Mar 2002 14:00:04 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: 7.52 second kernel compile |
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On Mon, 18 Mar 2002, Cort Dougan wrote: > > } But the whole point of _scattering_ is so incredibly broken in itself! > } Don't do it. > > Yes, that is indeed correct theoretically. The problem is that we actually > measured it and there was very little locality. When I added some > multiple-tlb loads it actually decreased wall-clock performance for nearly > every user load I put on the machine.
This is what I meant by hardware support for multiple loads - you mustn't let speculative TLB loads displace real TLB entries, for example.
> Linus, I knew that deep in my heart 8 years ago when I started in on all > this. I'm with you but I'm not good enough with a soldering iron to fix > every powerpc out there that forces that crappy IBM spawned madness upon > us.
Oh, I agree, we can't fix existing broken hardware, we'll ave to just live with it.
Linus
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