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    SubjectRe: [Lse-tech] [RFC] [PATCH] Scalable Statistics Counters
    Ravikiran G Thirumalai wrote:
    >
    > Hi Niels,
    >
    > On Wed, Dec 05, 2001 at 10:02:33AM -0500, Niels Christiansen wrote:
    > >
    > > I'm wondering about the scope of this. My Ethernet adapter with, maybe, 20
    > > counter fields would have 20 counters allocated for each of my 16
    > > processors.
    > > The only way to get the total would be to use statctr_read() to merge them.
    > > Same for the who knows how many IP counters etc., etc.
    >
    > Are you concerned with increase in memory used per counter Here? I suppose
    > that must not be that much of an issue for a 16 processor box....
    >
    > >
    > > How many and which counters were converted for the test you refer to?
    > >
    >
    > Well, I wrote a simple kernel module which just increments a shared global
    > counter a million times per processor in parallel, and compared it with
    > the statctr which would be incremented a million times per processor in
    > parallel..

    Would you care to point out a statistic in the kernel that is
    incremented
    more than 10.000 times/second ? (I'm giving you a a factor of 100 of
    playroom
    here) [One that isn't per-cpu yet of course]


    Greetings,
    Arjan van de Ven
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