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Date: Mon, 17 Nov 2008 11:55:35 -0800 (PST) From: Linus Torvalds <torvalds@...ux-foundation.org> To: David Miller <davem@...emloft.net> cc: mingo@...e.hu, dada1@...mosbay.com, rjw@...k.pl, linux-kernel@...r.kernel.org, kernel-testers@...r.kernel.org, cl@...ux-foundation.org, efault@....de, a.p.zijlstra@...llo.nl, shemminger@...tta.com Subject: Re: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28 On Mon, 17 Nov 2008, David Miller wrote: > > Again, do a non-NMI profile and the top (at least for me) > looks like this: Can _you_ please do a NMI profile and see what your real problem is? I can't imagine that Niagara (or whatever) is so weak that it can't do NMI's. The fact is, David, that Ingo just posted a profile that was _better_ than anything you have ever posted, and it doesn't show what you complain about. So he's not seeing it. Asking him to do a _stupid_ profile is just that: stupid. So try to figure out why his (better) profile doesn't match your (inferior) one, instead of asking him to do stupid things. It's some difference in architectures, likely: maybe the sparc timekeeping is crap, maybe it's a cache issue and sparc caches are crap, maybe it's something where Niagara (is it niagara) has some oddness that shows up because it has that odd four-threads+four-cores or whatever. Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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