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    SubjectRe: [BUG] long freezes on thinkpad t60
    On Tue, Jun 26, 2007 at 06:42:10PM +1000, Nick Piggin wrote:
    > They should also improve performance in heavily contended case due to
    > the nature of how they spin, but I know that's not something you want
    > to hear about. And theoretically there should be no reason why xadd is
    > any slower than dec and look at the status flags, should there? I never
    > implementedit in optimised assembly to test though...

    BTW, could you explain why the below diagnose doesn't relate
    to your solution?

    On 06/21/2007 12:08 PM, Ingo Molnar wrote:
    > So it seems the problem was that if a core kept _truly_ modifying a
    > cacheline via atomics in a high enough frequency, it could artificially
    > starve the other core. (which would keep waiting for the cacheline to be
    > released one day, and which kept the first core from ever making any
    > progress) To me that looks like a real problem on the hardware side -
    > shouldnt cacheline ownership be arbitrated a bit better than that?

    Thanks & regards,
    Jarek P.
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      Last update: 2007-06-26 12:51    [W:0.022 / U:22.216 seconds]
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