[time-nuts] Lady Heather, heavy load for PC?

[SAL CORNACCHIA]

Hello everyone I have a Magnavox (Nav-Com Inc.) Model C/GPS Part Number 140254.913 Serial Number 01559 does anyone have any experience what it can be used for or any information available, thank You for helping.
Best regards, 

Sal C. Cornacchia
Electronic RF Microwave Engineer (Ret.)







________________________________
From: David C. Partridge <david.partridge at dsl.pipex.com>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Tue, January 19, 2010 2:18:02 PM
Subject: Re: [time-nuts] Lady Heather, heavy load for PC?

We discussed this here not long back.  The legacy of LH is that it was
written as a DOS program which has been ported to Windows, and therefore
runs in a loop looking for work to do with an occasional Sleep(0) call.  It
isn't particularly related to the graphics or mathematics processing which
overall are pretty light.

What this means is that LH running on a single core machine will drive the
processor pretty hard.

Mark and John are both well aware of this issue and know well enough that
the long term solution is to rework the code completely to be event driven
(Mark certainly had quite a few mails from me on the subject).  However that
isn't a quick and easy job.

For now I fear you will have to tolerate the fact that Lady Heather is not
as thoughtful of other applications or your CPU power consumption as she
might be.

Dave

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Arnold Tibus
Sent: 19 January 2010 17:36
To: Discussion of precise time and frequency measurement
Subject: [time-nuts] Lady Heather, heavy load for PC?

I am just realizing that the nice programLady Heather issue 3beta seem to be
a heavy Lady ;-)

Wondering why the processor temp level on my laptop (Thinkpad T43p, 2.26
GHz, 2GB RAM) went up to 85 °C I decided to look careful after it with a
small add on program.

The processor temperature of my Laptop is stable at around
65 °C when I have only opened my mailing software. 
But this value does encrease very fast by up to 20 °C more when I start LH
(3beta). 
The top level of 83 to 85 °C is reached within a few minutes, the fan
running as well on top speed. This behavior is repeatable.

When I switch LH down, within 10 sec I can read already 10 °C less and in a
few minutes more I am back on the initial value close to 65 deg. C. 

So LH seam to be very heavy concerning the thermal charge. 
Not only the whole board is warming up with time, the fan is as well running
steadily quite noisy.

Is the math load, doing the adev calculation etc,.so heavy? I am thinking to
ovoid parallel works on this Laptop when running LH for hours or days...not
wanting to decrease the life time of the Intel Processor....

I wonder, did somebody else made similar experience with Thunderbolt and
Lady Heather?
Perhaps Mark Sims or John Miles can give a good explanation.

Ah, before I forget, running instead TBoltmon fromTrimble does not encrease
the temperature at all !
So the culprit must be the math or/ and graph. routines,  I think.

regards

Arnold





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