Re: [PATCH] Dynamic tick, version 050127-1

From: Lee Revell (rlrevell_at_joe-job.com)
Date: 02/01/05

  • Next message: Lee Revell: "Re: [patch] Real-Time Preemption, -RT-2.6.11-rc2-V0.7.36-04" 
    To: Tony Lindgren <tony@atomide.com>
Date:	Tue, 01 Feb 2005 15:20:05 -0500

    On Thu, 2005-01-27 at 13:29 -0800, Tony Lindgren wrote:
    > Hi all,
    >
    > Thanks for all the comments, here's an updated version of the dynamic
    > tick patch.

    Hi,

    I was wondering how Windows handles high res timers, if at all. The
    reason I ask is because I have been reverse engineering a Windows ASIO
    driver, and I find that if the latency is set below about 5ms, by
    examining the kernel timer queue with SoftICE I can see that several
    kernel timers with 1ms period are created. (Presumably the sound card's
    interval timer is used for longer periods).

    But, I have seen people mention in the "singing capacitor" threads on
    this list that Windows uses 100 for HZ.

    So, how do they implement 1ms timers with a 10ms tick rate? Does
    Windows dynamically reprogram the PIT as well?

    Lee

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  • Next message: Lee Revell: "Re: [patch] Real-Time Preemption, -RT-2.6.11-rc2-V0.7.36-04"

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