mersenneforum.org  

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

Reply
 
Thread Tools
Old 2008-12-02, 11:21   #1
roemer2201
 
Dec 2008
127.0.0.1

2×7 Posts
Default Ubuntu Server Crashes when running mprime 257

Hello everybody,

i got a AMD Athlon 1200+ CPU running Ubuntu Server 8.04 with the Xfce-Desktop (i think this doesn't matter). Everytime i start mprime v25.7 the PC crashes after ~1min running.

Can somebody tell what the reason for this crash is?
roemer2201 is offline   Reply With Quote
Old 2008-12-02, 13:54   #2
henryzz
Just call me Henry
 
henryzz's Avatar
 
"David"
Sep 2007
Cambridge (GMT/BST)

5,821 Posts
Default

Quote:
Originally Posted by roemer2201 View Post
Hello everybody,

i got a AMD Athlon 1200+ CPU running Ubuntu Server 8.04 with the Xfce-Desktop (i think this doesn't matter). Everytime i start mprime v25.7 the PC crashes after ~1min running.

Can somebody tell what the reason for this crash is?
probably because your computer is unstable
are you overclocking
what are your temperatures
http://www.alcpu.com/CoreTemp/
henryzz is offline   Reply With Quote
Old 2008-12-02, 19:25   #3
mdettweiler
A Sunny Moo
 
mdettweiler's Avatar
 
Aug 2007
USA (GMT-5)

3×2,083 Posts
Default

Quote:
Originally Posted by henryzz View Post
probably because your computer is unstable
are you overclocking
what are your temperatures
http://www.alcpu.com/CoreTemp/
Core Temp won't work for Linux; lm-sensors is the widely accepted temperature measuring tool of choice for Linux. On a Ubuntu system (desktop or server, don't really matter), just follow these steps:

-Go to a terminal and run the command "sudo apt-get install lm-sensors" (or use your favorite package manager to install the lm-sensors package).

-Then run the command "sudo sensors-detect" in a terminal. It will ask you a bunch of questions; answer Yes to all of them. When it asks whether to update /etc/modules automatically, answer Yes to that too.

-Now, to check the CPU temperature, just run the command "sensors" in a terminal. Depending on your machine, it will output various amounts of sensor data; the main one to pay attention to is the one marked "core temp" or "CPU temperature". (The naming varies from motherboard to motherboard.)

Hope this helps!
mdettweiler is offline   Reply With Quote
Old 2008-12-02, 20:54   #4
markr
 
markr's Avatar
 
"Mark"
Feb 2003
Sydney

10758 Posts
Default

Bad memory is always a possibility. Did it crash / lockup occasionally before installing mprime? Have you tested your memory? For example, with memtest.
markr is offline   Reply With Quote
Old 2008-12-03, 07:12   #5
roemer2201
 
Dec 2008
127.0.0.1

E16 Posts
Default

I think the memory isn't the point of failure. Usually this PC runs 6 Days a week and it didnt crash, no matter what i do. I also ran memtest86+ 2 Month ago ... no errors.

The temperature.... i didn't overclock this CPU. A sensors applet is allready running, but i didn't care about that while running mprime. I'll do that today! But when i am running a other programm which causes 100% cpu-load (a virtual pc or updates) the coretemp is not higher then 45°C. Anyway, i'll test it on todays evening.
Much thanks for the lm-sensors guide. I hope you dont mind if i copy this into my wiki ?

Maybe i should test the PC with an older version of mprime and whether it crashes, too.

...I willl post news tomorrow. Thanks so far!

PS.: is it possible to run mprime causing just 50% cpu-load and not 100%? Because on this machine mprime slows down all other processes.
roemer2201 is offline   Reply With Quote
Old 2008-12-03, 11:39   #6
markr
 
markr's Avatar
 
"Mark"
Feb 2003
Sydney

3·191 Posts
Default

Quote:
Originally Posted by roemer2201 View Post
PS.: is it possible to run mprime causing just 50% cpu-load and not 100%? Because on this machine mprime slows down all other processes.
From undoc.txt:
Quote:
If you are running on a laptop or in a hot room and you want to slow the
program down to reduce heat, then you can add this line to prime.txt:
Throttle=n
where n is the percentage of time the program should run. For example,
Throttle=40 means the program will run 40% and be idle 60% of the time.
The program will run for a few seconds then sleep for a few, and average out at n%. Don't forget to close the program before changing prime.txt.
markr is offline   Reply With Quote
Old 2008-12-03, 17:17   #7
henryzz
Just call me Henry
 
henryzz's Avatar
 
"David"
Sep 2007
Cambridge (GMT/BST)

5,821 Posts
Default

Quote:
Originally Posted by roemer2201 View Post
PS.: is it possible to run mprime causing just 50% cpu-load and not 100%? Because on this machine mprime slows down all other processes.
try different percentages
75% might not affect the running of the pc but give an extra 50% of help to GIMPS
henryzz is offline   Reply With Quote
Old 2008-12-05, 16:23   #8
roemer2201
 
Dec 2008
127.0.0.1

2·7 Posts
Default

To determine wheter ubuntu itself or the pc it installed a virtual machine and in that machine i run mprime. The same problem occured. So i think the temperature is the problem on this machine, otherwise i would not have crashed because a virtual machine doesn't interfere with the host-operating system.

Thanks for your help!
roemer2201 is offline   Reply With Quote
Old 2008-12-05, 17:57   #9
Prime95
P90 years forever!
 
Prime95's Avatar
 
Aug 2002
Yeehaw, FL

7×1,051 Posts
Default

The most common failure is memory, not heat. If the small FFT torture test works, then it is even more likely that memory is the problem. Try running with relaxed memory timings or with memory swapped from another computer
Prime95 is offline   Reply With Quote
Old 2008-12-05, 18:47   #10
roemer2201
 
Dec 2008
127.0.0.1

2·7 Posts
Default

Well, ths PC had temperature problems month ago, then a bought a new fan and since that the pc ran without problems... now i added an extra ventilator in front of this PC. Lets se whether it crashed anyway or not.

But i'll try the FFT torture test. Thanks for that tip.

Last fiddled with by roemer2201 on 2008-12-05 at 18:48
roemer2201 is offline   Reply With Quote
Reply

Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
mprime not being recognized on ubuntu 16.04 Yoshi24517 Software 15 2018-04-07 10:57
Problem running Primo on Ubuntu VM Stargate38 FactorDB 9 2012-07-02 21:23
How to install mprime on Ubuntu Server Salamander89 Software 3 2011-07-28 15:51
How to Run mprime on Ubuntu Jaunty as daemon? Unregistered Information & Answers 1 2009-08-01 02:02
mprime under Ubuntu? Unregistered Linux 8 2007-11-23 23:03

All times are UTC. The time now is 23:43.

Fri Mar 5 23:43:15 UTC 2021 up 92 days, 19:54, 0 users, load averages: 0.99, 1.06, 1.20

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, 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.