mersenneforum.org  

Go Back   mersenneforum.org > Great Internet Mersenne Prime Search > Data

Reply
 
Thread Tools
Old 2003-10-09, 22:30   #1
guido72
 
guido72's Avatar
 
Aug 2002
Rovereto (Italy)

3×53 Posts
Default rebooting and errors...

I haven't a representative sample, so just wondering... "Pepe" is a server always on and its error rate is pretty low... Any relations between rebooting and errors?
guido72 is offline   Reply With Quote
Old 2003-10-09, 23:47   #2
outlnder
 
outlnder's Avatar
 
Aug 2002

2×3×53 Posts
Default

I have noticed a tendency for marginally good computers to throw an error within 10 minutes of rebooting.

However, I have not made any reasonable study.
outlnder is offline   Reply With Quote
Old 2003-10-10, 08:58   #3
lycorn
 
lycorn's Avatar
 
Sep 2002
Oeiras, Portugal

24·89 Posts
Default

That makes sense to me. Most of the machines I have been running P95 in are on all the time, and I have done dozens of DCs without a single error (some non-matching results I obtained were other machines fault). The only situations where I had errors were ILLEGAL SUMOUTS on a machine that was running games, so I suspect it was a harmless error due to incorrect FPU restoration by sound drivers, AND some SUMINPUT!=SUMOUTPUT upon machine booting. I am pretty sure that had something to do with a sharp temp rise of the CPU, as that machine has been running P95 for nearly 2 years now without any error, except for that particular situation.
So my opinion is that, particularly in OCed machines, there may be a connection between rebooting and errors, due to temperature variations that lead to unstability.

Last fiddled with by lycorn on 2003-10-10 at 08:59
lycorn is offline   Reply With Quote
Old 2003-10-10, 12:05   #4
eepiccolo
 
eepiccolo's Avatar
 
Dec 2002
Frederick County, MD

37010 Posts
Default

My machines aren't OC'd, but I've only ever gotten an error once, ILLEGAL SUMOUT, and it was after booting up the computer after the light blinked in my house. I reboot the computers a fair amount, relatively speaking, and have never encountered a problem.
eepiccolo is offline   Reply With Quote
Old 2003-10-10, 13:21   #5
lycorn
 
lycorn's Avatar
 
Sep 2002
Oeiras, Portugal

24×89 Posts
Default

Oooops! I have been reviewing some old threads and my last post about errors is not really accurate . In fact there were two ROUNDOFF errors, and not upon rebooting, but after putting the side covers of the box in place, which led to a sharp rise in the CPU temperature.
Anyway, the basic conclusion still holds, the sudden temperature changes may induce errors. Shutting down and rebooting a machine may cause a similar effect when P95 is running, particularly in OCed CPUs that have already a tendency to run hot, like the Athlons. But I agree it is not a common situation...
lycorn is offline   Reply With Quote
Old 2003-10-10, 15:34   #6
nomadicus
 
nomadicus's Avatar
 
Jan 2003
North Carolina

2×3×41 Posts
Default

Quote:
Originally posted by lycorn
Shutting down and rebooting a machine may cause a similar effect when P95 is running, particularly in OCed CPUs that have already a tendency to run hot, like the Athlons. But I agree it is not a common situation...
Laptops too. I have a 2.53GHz P4 laptop -- the CPU fan runs at max. all the time. Before rebooting, I manually shutdown p95 and wait for the fan to slow down (on the assumption, the chip is reasonably cool). Even with the extended warranty, I just don't want to melt the chip . . . and now according to this thread, I don't want to incur error(s).
nomadicus is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
ERRORS Unregistered Information & Answers 2 2013-04-01 04:14
Rounding Errors in v25.11 iBeta Software 10 2011-10-09 04:15
Suggestions and Errors kar_bon Riesel Prime Data Collecting (k*2^n-1) 8 2010-11-29 00:34
Core 2 Duo errors? paulunderwood Hardware 3 2006-11-16 00:00
computing errors? Citrix Hardware 6 2005-08-08 23:59

All times are UTC. The time now is 11:55.

Tue Dec 1 11:55:58 UTC 2020 up 82 days, 9:06, 1 user, load averages: 2.13, 2.27, 2.08

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.