Messages in this thread | | | From | Ian Wienand <> | Date | Wed, 24 Sep 2003 09:04:12 +1000 | Subject | Re: NS83820 2.6.0-test5 driver seems unstable on IA64 |
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On Tue, Sep 23, 2003 at 10:27:35AM -0700, David S. Miller wrote: > As I understand it, you even do this stupid printk for user apps > as well, that makes it more than rediculious.
Just as a point of interest, as an application programmer I think it's the type of thing you want to know about quite loudly. The only benchmark style figure on this I've ever seen is in this paper
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vcconWindowsDataAlignmentOnIPFX86X86-64.asp
(forgive the long url) which, if you scroll down to the little graph, shows OS fixup is about 450 times slower that an aligned access. That sucks, and if I didn't realise I'd done it, it would suck even more.
Oh, and I think fixing it up automatically & warning is much more useful than sending a (by default) terminating signal to the program; though I'm sure others might disagree.
-i ianw@gelato.unsw.edu.au http://www.gelato.unsw.edu.au - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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