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Re: [gpsd-dev] Fwd: Re: gpsd for time sync on Ubuntu remix too hard for

From: Gary E. Miller
Subject: Re: [gpsd-dev] Fwd: Re: gpsd for time sync on Ubuntu remix too hard for normals - how to improve?
Date: Thu, 30 May 2019 12:35:17 -0700

Yo Greg!

On Thu, 30 May 2019 00:26:31 -0400
Greg Troxel <address@hidden> wrote:

> "Gary E. Miller" <address@hidden> writes:
> > I know any long term process using 2% on my android will get me nags
> > about sleep being prevented.
> >
> > On Linux there are vague references to "CPU must be idle" to enter
> > long term sleep/hibernate.  Unclear if 1% is close enough to idle...
> >
> > Can someone that uses sleep test this?  
> As a datapoint, I have an old mac running 10.11 that I unsuspend
> occasioanlly for testing.  It is configured to suspend after 1 hour of
> idle, when running on the AC adaptor.  I have gpsd on it, and ran
> "gpsd -n" with a ublox7 usb gps mouse.   I measured how long it
> stayed awake (specificallly, responding to ping), and it was exactly
> 60 minutes, just as it is supposed to be.  So gpsd running seemed to
> have zero effect.
> I realize this is one OS<,and others may vary.  Someday I will try the
> same experiment with ubutnu.

I'm not so worried about the macro sleep state, but rather the micro
sleep states.  Those millisecond CPU sleeps that save energy.  Very
important for IoT dnd Android devices.

Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703
        address@hidden  Tel:+1 541 382 8588

            Veritas liberabit vos. -- Quid est veritas?
    "If you can’t measure it, you can’t improve it." - Lord Kelvin

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