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SubjectRe: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28
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From: Nick Piggin <nickpiggin@yahoo.com.au>
Date: Tue, 18 Nov 2008 20:44:10 +1100

> On Tuesday 18 November 2008 07:58, David Miller wrote:
> > From: Linus Torvalds <torvalds@linux-foundation.org>
> > Date: Mon, 17 Nov 2008 12:30:00 -0800 (PST)
> >
> > > On Mon, 17 Nov 2008, David Miller wrote:
> > > > It's on my workstation which is a much simpler 2 processor
> > > > UltraSPARC-IIIi (1.5Ghz) system.
> > >
> > > Ok. It could easily be something like a cache footprint issue. And while
> > > I don't know my sparc cpu's very well, I think the Ultrasparc-IIIi is
> > > super- scalar but does no out-of-order and speculation, no?
> >
> > I does only very simple speculation, but you're description is accurate.
>
> Surely it would do branch prediction, but maybe not indirect branch?

Right.


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