[parisc-linux] NTP and the real time clock

[parisc-linux] NTP and the real time clock

[Ralf Hildebrandt]

Whenever I turn off my 712/80 and turn it back on, NTP (ntpq) reports
an offset of about 1200.
Question: Could it be that at shutdown the time is not stored in the
on-board real-time-clock?

-- 
Ralf Hildebrandt (Im Auftrag des Referat V A)   Ralf.Hildebrandt@charite.de
Charite Campus Virchow-Klinikum                 Tel.  +49 (0)30-450 570-155
Referat V A - Kommunikationsnetze -             Fax.  +49 (0)30-450 570-916
Gates' Law: Every 18 months, the speed of software halves.

Re: [parisc-linux] NTP and the real time clock

[Ralf Hildebrandt]

Am 06.05.2002 um 08:44:02 +0200 schrieb Ralf Hildebrandt folgendes:
> Whenever I turn off my 712/80 and turn it back on, NTP (ntpq) reports
> an offset of about 1200.
> Question: Could it be that at shutdown the time is not stored in the
> on-board real-time-clock?

I find this intriguing:

gecko:~# hwclock --show
Mon May  6 08:46:27 2002  -0.994167 seconds
gecko:~# hwclock --systohc
gecko:~# hwclock --show
Mon May  6 08:46:33 2002  -0.999854 seconds

So the hardwareclock is never set.
Which setting in "Character Devices" do I need so hwclock can access
the on-board real-time-clock?
 < > /dev/nvram support
 < > Enhanced Real Time Clock Support 

-- 
Ralf Hildebrandt (Im Auftrag des Referat V A)   Ralf.Hildebrandt@charite.de
Charite Campus Virchow-Klinikum                 Tel.  +49 (0)30-450 570-155
Referat V A - Kommunikationsnetze -             Fax.  +49 (0)30-450 570-916
There are two ways to write error-free programs. Only the third one
works.

Re: [parisc-linux] NTP and the real time clock

[kenneth westelinck]

You'll need to set this option: CONFIG_GENRTC=y

----- Original Message -----
From: "Ralf Hildebrandt" <Ralf.Hildebrandt@charite.de>
To: "Ralf Hildebrandt" <Ralf.Hildebrandt@charite.de>
Cc: <parisc-linux@lists.parisc-linux.org>
Sent: Monday, May 06, 2002 8:52 AM
Subject: Re: [parisc-linux] NTP and the real time clock


> Am 06.05.2002 um 08:44:02 +0200 schrieb Ralf Hildebrandt folgendes:
> > Whenever I turn off my 712/80 and turn it back on, NTP (ntpq) reports
> > an offset of about 1200.
> > Question: Could it be that at shutdown the time is not stored in the
> > on-board real-time-clock?
>
> I find this intriguing:
>
> gecko:~# hwclock --show
> Mon May  6 08:46:27 2002  -0.994167 seconds
> gecko:~# hwclock --systohc
> gecko:~# hwclock --show
> Mon May  6 08:46:33 2002  -0.999854 seconds
>
> So the hardwareclock is never set.
> Which setting in "Character Devices" do I need so hwclock can access
> the on-board real-time-clock?
>  < > /dev/nvram support
>  < > Enhanced Real Time Clock Support
>
> --
> Ralf Hildebrandt (Im Auftrag des Referat V A)
Ralf.Hildebrandt@charite.de
> Charite Campus Virchow-Klinikum                 Tel.  +49 (0)30-450
570-155
> Referat V A - Kommunikationsnetze -             Fax.  +49 (0)30-450
570-916
> There are two ways to write error-free programs. Only the third one
> works.
>
>
> _______________________________________________
> parisc-linux mailing list
> parisc-linux@lists.parisc-linux.org
> http://lists.parisc-linux.org/mailman/listinfo/parisc-linux
>

Re: [parisc-linux] NTP and the real time clock

[Randolph Chung]

> I find this intriguing:
> 
> gecko:~# hwclock --show
> Mon May  6 08:46:27 2002  -0.994167 seconds
> gecko:~# hwclock --systohc
> gecko:~# hwclock --show
> Mon May  6 08:46:33 2002  -0.999854 seconds
> 
> So the hardwareclock is never set.

Are you sure?

legolas:/usr/src/linux-ide# hwclock --show
Mon May  6 00:05:08 2002  -0.995996 seconds
legolas:/usr/src/linux-ide# date 050600002002
Mon May  6 00:00:00 PDT 2002
legolas:/usr/src/linux-ide# hwclock --systohc
legolas:/usr/src/linux-ide# hwclock --show
Mon May  6 00:00:23 2002  -0.999298 seconds

> Which setting in "Character Devices" do I need so hwclock can access
> the on-board real-time-clock?
>  < > /dev/nvram support
>  < > Enhanced Real Time Clock Support 

You want: "Generic RTC device support" (I think it's on by default). The
fact that hwclock didn't give you an error suggests to me that you
already have that enabled.

randolph

Re: [parisc-linux] NTP and the real time clock

[Ralf Hildebrandt]

Am 06.05.2002 um 01:03:29 -0700 schrieb Randolph Chung folgendes:

> > So the hardwareclock is never set.
> 
> Are you sure?

Well, no.
 
> legolas:/usr/src/linux-ide# hwclock --show
> Mon May  6 00:05:08 2002  -0.995996 seconds
> legolas:/usr/src/linux-ide# date 050600002002
> Mon May  6 00:00:00 PDT 2002
> legolas:/usr/src/linux-ide# hwclock --systohc
> legolas:/usr/src/linux-ide# hwclock --show
> Mon May  6 00:00:23 2002  -0.999298 seconds

OK, seems to work.
But what is that "-0.999298 seconds" stuff?

-- 
Ralf Hildebrandt (Im Auftrag des Referat V A)   Ralf.Hildebrandt@charite.de
Charite Campus Virchow-Klinikum                 Tel.  +49 (0)30-450 570-155
Referat V A - Kommunikationsnetze -             Fax.  +49 (0)30-450 570-916
When the government outlaws cryptography, bayl pevzvanyf jvyy unir
cevinpl.