RE: polling in 4.11 vs 5.4

From: Mao Shou Yan (david.mao_at_thomson.net)
Date: 08/23/05

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To: <freebsd-performance@freebsd.org>

    BTW, I found that context switch in 5.4 is much higher than 5.4 while enabling polling. (Using systat -vmstat 1)

    -----Original Message-----
    From: owner-freebsd-performance@freebsd.org [mailto:owner-freebsd-performance@freebsd.org] On Behalf Of Mao Shou Yan
    Sent: 2005Äê8ÔÂ23ÈÕ 10:07
    To: freebsd-performance@freebsd.org
    Subject: polling in 4.11 vs 5.4

    Hi, everybody,

             I hope this is the right place that I post to!

             When I enabled polling in 5.4 and 4.11, I found that CPU load
    in 5.4 is much higher than 4.11. For example, suppose HZ is 5000, in 5.4
    the idle CPU is about 87%, but in 4.11, the idle CPU is about 99.9%. Is
    this right? Or the statistic is wrong in 4.11?

             BTW, ACPI is disabled under 5.4.

             I'm looking forward your reply.

             Any response is welcome!

     

    David.Mao

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