[lkml]   [2005]   [Jul]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [PATCH] i386: Selectable Frequency of the Timer Interrupt
    dean gaudet wrote:
    > On Wed, 13 Jul 2005, Chris Wedgwood wrote:
    >>On Wed, Jul 13, 2005 at 01:48:57PM -0700, Andrew Morton wrote:
    >>>"My expectation is if we want to beat the competition, we'll want
    >>>the ability to go *under* 100Hz."
    >>What does Windows do here?
    > windows xp base rate is 100Hz... but multimedia apps can ask for almost


    > any rate they want (depends on the hw capabilities). i recall seeing
    > rates >1200Hz when you launch some of the media player apps -- sorry i
    > forget the exact number.

    When you have (exactly one) VMware's VM with WindowsXP running on the box,
    you can track guest's tick frequency changes in `dmesg` as vmmon reports
    frequency guest wants while reprogramming /dev/rtc.

    Highest frequency I ever saw is 2.6 Linux with local APIC - it needs 2kHz, as
    1kHz timer from 8253 and from local APIC are shifted appart by exactly half
    of their period.
    Petr Vandrovec

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-07-14 02:15    [W:0.022 / U:10.296 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site