lkml.org 
[lkml]   [2008]   [Aug]   [28]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    SubjectFW: [linux-pm] select with timeout across S3
    Date
    From
    The behavior of linux (in both 2.4.x and 2.6.x) is when the processor
    sleeps, timeouts on select don't take into account the sleep time,
    only the run time.

    For example, this program should pause for 10 minutes -- however
    if we go into S3 in the middle its pausing for (10 minutes + time in
    S3)

    I saw this on both 2.6.20 and 2.6.22...

    marty

    -----Original Message-----
    From: linux-pm-bounces@lists.linux-foundation.org
    [mailto:linux-pm-bounces@lists.linux-foundation.org] On Behalf Of Pavel
    Machek
    Sent: Thursday, August 28, 2008 10:30 AM
    To: Leisner, Martin
    Cc: linux-pm@lists.linux-foundation.org
    Subject: Re: [linux-pm] select with timeout across S3

    On Wed 2008-08-27 15:23:13, Leisner, Martin wrote:
    > What's a good way to "wait" across a transition to/from processor
    sleep
    > (acpi S3 or other means)?
    >
    >
    > It seems the timeouts on select(2) only deal with with time correctly
    > when the processor is awake -- when the processor is sleeping its not
    > subtracted from the request...
    >
    > The desirable behavior out of select would be for it to timeout
    whenever
    > the system wakes up if the desired interval has elapsed...

    That sounds like a bug. Can you write small demo program and post it
    to lkml?

    --
    (english) http://www.livejournal.com/~pavelmachek
    (cesky, pictures)
    http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
    _______________________________________________
    linux-pm mailing list
    linux-pm@lists.linux-foundation.org
    https://lists.linux-foundation.org/mailman/listinfo/linux-pm
    [unhandled content-type:application/octet-stream]
    \
     
     \ /
      Last update: 2008-08-28 19:37    [W:0.026 / U:30.228 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site