Re: [opensuse] how to burn my cpu?

[Registration Account]

Easy, Install the backup software "kdar" Backup you ALL partitions and
exclude noting and use "full backup" do not create multiple files to an
NFS drive and verify the installation = I have had my P4 shown on me
reliable due critical temp overheat despite throttling which appear (not
sure) to be overridden. Kdar can be found on a search of software
management using the keyword "backup" in versions 10.0-10.2 - Happy frying
Scott

Eberhard Roloff wrote:
> Hi,
>
> I am looking for an app that makes my CPU as hot as can be.
>
> This is to test various things that should make my PC silently running
> on a shoestring while staying stable as is.
>
> I googled, but only found cpuburn 1.4
>
> While this works, it seems to be developed for PIII 450 machines. I have
> a rather modest machine by todays standards (P4, 2.8), but even starting
> multiple simultaneous instances of cpuburn  never "really" challenge my cpu.
>
> Does anyone know of something more stressful that works on Linux?
>
> Thanks much and kind regards
> Eberhard
>
>   


smime.p7s
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Re: [opensuse] how to burn my cpu?

[Carl Spitzer]

On Thu, 2007-05-24 at 15:44 -0500, M Harris wrote:
> On Thursday 24 May 2007 07:33, Eberhard Roloff wrote:
> > I am looking for an app that makes my CPU as hot as can be.
> >
> > This is to test various things that should make my PC silently running
> > on a shoestring while staying stable as is.
>   time echo "scale=1010; 16*a(1/5)-4*a(1/239)" |bc -lq
> 
>   The above will compute PI to 1000+ decimal places in about 300-400 ms 
> on a 
> modern PC.  But, if you set scale sufficiently high say,   20  then 
> the cpu will become quite warm... and will not damage anything. 

That is very cleaver I sent it to my old computer professor who likes
APL.  Now there is a hard language.  Ill see how fast his machine kicks.
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Re: [opensuse] how to burn my cpu?

[James Knott]

G T Smith wrote:
>  
> > I guess you missed the ";-)".  That "infinite binary loop" was a bit of
> > nonsense, that was going around a few years back.
>
>
> This reminds me... Some a years ago I came across I link where some guys
> overclocked a CPU and fried an egg on it while playing Doom. But
> hopefully this is not what is required here :-)
A while ago, I read something (from someone at Intel?)  that the thermal
density, that is amount of heat per volume was greater in modern CPU's
than in nuclear reactor!  Modern CPU's often draw as much power as a
light bulb and a light bulb runs white hot!

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Re: [opensuse] how to burn my cpu?

[Volker Poplawski]

Another one:
Client of the GIMPS project (www.mersenne.org) in stress-test-mode.

Regards
Volker

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Re: [opensuse] how to burn my cpu?

[G T Smith]

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

James Knott wrote:
> M Harris wrote:
>> On Thursday 24 May 2007 17:08, James Knott wrote:
>>   
>>> Maybe you should try one of those "infinite binary loops", that were so
>>> popular a few years back.  They were supposedly able to trash a CPU!  ;-)
>>> 
>>  ... I've never actually been able to ruin a cpu that was properly 
>> sinked and 
>> vented...   what the PI routine does not do is IO, not till its done anyway. 
>> But what it does do if scale is set high enough is to force the memory 
>> requirements off chip... so it exercises not just the ALU, but the bus logic 
>> as well... and it keeps those flops toggling long and fast which in turn 
>> draws lots of current which in turn creates lots of heat.   Most of the time 
>> the processor in a linux machine is pretty much sitting there idle... that 
>> has always amazed me also
>>
>>
>>
>>
>>   
> I guess you missed the ";-)".  That "infinite binary loop" was a bit of
> nonsense, that was going around a few years back. 
> 

This reminds me... Some a years ago I came across I link where some guys
overclocked a CPU and fried an egg on it while playing Doom. But
hopefully this is not what is required here :-)
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Re: [opensuse] how to burn my cpu?

[Theo v. Werkhoven]

Thu, 24 May 2007, by [EMAIL PROTECTED]:

> Hi,
> 
> I am looking for an app that makes my CPU as hot as can be.

Download and burn UBCD.
That has a good collection of tests for (almost) every piece of
hardware you can think of.

In the mean time, here's something that keeps the CPU busy for a
bit:

/*
 * load50.c -- a simple busy-looping tool. 
 *
 * Obviously, this runs with any kernel and any Unix
 */ 

#include 
#include 
#include 

int main(int argc, char **argv)
{
  int i, load=50;

  if (argc==2) {
  load=atoi(argv[1]);
  }
  printf("Bringing load to %i\n",load);
  
  for (i=0; ihttp://counter.li.org
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Re: [opensuse] how to burn my cpu?

[James Knott]

M Harris wrote:
> On Thursday 24 May 2007 17:08, James Knott wrote:
>   
>> Maybe you should try one of those "infinite binary loops", that were so
>> popular a few years back.  They were supposedly able to trash a CPU!  ;-)
>> 
>   ... I've never actually been able to ruin a cpu that was properly 
> sinked and 
> vented...   what the PI routine does not do is IO, not till its done anyway. 
> But what it does do if scale is set high enough is to force the memory 
> requirements off chip... so it exercises not just the ALU, but the bus logic 
> as well... and it keeps those flops toggling long and fast which in turn 
> draws lots of current which in turn creates lots of heat.   Most of the time 
> the processor in a linux machine is pretty much sitting there idle... that 
> has always amazed me also
>
>
>
>
>   
I guess you missed the ";-)".  That "infinite binary loop" was a bit of
nonsense, that was going around a few years back. 

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Re: [opensuse] how to burn my cpu?

[M Harris]

On Thursday 24 May 2007 17:08, James Knott wrote:
> Maybe you should try one of those "infinite binary loops", that were so
> popular a few years back.  They were supposedly able to trash a CPU!  ;-)
... I've never actually been able to ruin a cpu that was properly 
sinked and 
vented...   what the PI routine does not do is IO, not till its done anyway. 
But what it does do if scale is set high enough is to force the memory 
requirements off chip... so it exercises not just the ALU, but the bus logic 
as well... and it keeps those flops toggling long and fast which in turn 
draws lots of current which in turn creates lots of heat.   Most of the time 
the processor in a linux machine is pretty much sitting there idle... that 
has always amazed me also




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Re: [opensuse] how to burn my cpu?

[James Knott]

M Harris wrote:
> On Thursday 24 May 2007 15:45, Randall R Schulz wrote:
>   
>>  Arbitrary (and realistic, everyday) instruction mixes don't
>> often do that.
>> 
>   Yup, but the PI routine does... really.
>
>   ... and its measurable  (its amazing).
>
>
>   
Maybe you should try one of those "infinite binary loops", that were so
popular a few years back.  They were supposedly able to trash a CPU!  ;-)


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Re: [opensuse] how to burn my cpu?

[M Harris]

On Thursday 24 May 2007 15:45, Randall R Schulz wrote:
>  Arbitrary (and realistic, everyday) instruction mixes don't
> often do that.
Yup, but the PI routine does... really.

... and its measurable  (its amazing).


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Re: [opensuse] how to burn my cpu?

[Randall R Schulz]

All these suggestions to run this or that application 'cause it runs the 
CPU utilization up to or near 100% are not really appropriate as true 
stress testers.

The point of real CPU burn-in / stress test / thermal dissipation test 
programs is that they keep as much of the CPUs internal logic busy as 
possible. Arbitrary (and realistic, everyday) instruction mixes don't 
often do that. That's why specialized programs are written for this 
purpose. In addition to generating genuinely stressful instruction 
mixes, the good ones also verify the results, especially of arithmetic 
operations, to make sure the CPU is not generating erroneous results.

If you really want to see what kind of thermal loads result or ensure 
that there are no anomalies in your CPU, then you should use one of the 
purpose-built stress testers.


Randall Schulz
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Re: [opensuse] how to burn my cpu?

[M Harris]

On Thursday 24 May 2007 07:33, Eberhard Roloff wrote:
> I am looking for an app that makes my CPU as hot as can be.
>
> This is to test various things that should make my PC silently running
> on a shoestring while staying stable as is.
time echo "scale=1010; 16*a(1/5)-4*a(1/239)" |bc -lq

The above will compute PI to 1000+ decimal places in about 300-400 ms 
on a 
modern PC.  But, if you set scale sufficiently high say,   20  then 
the cpu will become quite warm... and will not damage anything. 




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Re: [opensuse] how to burn my cpu?

[Thomas Hertweck]

Eberhard Roloff wrote:
> [...]
> I am looking for an app that makes my CPU as hot as can be.

Compile the Linux kernel in an infinite loop with make's -j option
for multiple jobs. Or use gcc source instead of the Linux kernel.
In principle, this should test your CPU and RAM quite well.

Th.
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Re: [opensuse] how to burn my cpu?

[jdd]

Eberhard Roloff wrote:

Hi,

I am looking for an app that makes my CPU as hot as can be.

This is to test various things that should make my PC silently running
on a shoestring while staying stable as is.

I googled, but only found cpuburn 1.4

While this works, it seems to be developed for PIII 450 machines. I have
a rather modest machine by todays standards (P4, 2.8), but even starting
multiple simultaneous instances of cpuburn  never "really" challenge my cpu.

Does anyone know of something more stressful that works on Linux?

Thanks much and kind regards
Eberhard



try cinelerra... a video editor, I never could make it run with my 
512Mb ram.


time ago it asked for a cluster of 40+ machines, now may be a quad cpu...

jdd
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Re: [opensuse] how to burn my cpu?

[Rikard Johnels]

On Thursday 24 May 2007 14:33, Eberhard Roloff wrote:
> Hi,
>
> I am looking for an app that makes my CPU as hot as can be.
>
> This is to test various things that should make my PC silently running
> on a shoestring while staying stable as is.
>
> I googled, but only found cpuburn 1.4
>
> While this works, it seems to be developed for PIII 450 machines. I have
> a rather modest machine by todays standards (P4, 2.8), but even starting
> multiple simultaneous instances of cpuburn  never "really" challenge my
> cpu.
>
> Does anyone know of something more stressful that works on Linux?
>
> Thanks much and kind regards
> Eberhard

take a look at lucifer (http://petertodd.ca/tech/lucifer/ )

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Re: [opensuse] how to burn my cpu?

[David SMITH]

On Thu, May 24, 2007 at 02:33:37PM +0200, Eberhard Roloff wrote:
> I am looking for an app that makes my CPU as hot as can be.

"Windows Vista". ;-)

More seriously, perhaps running a couple of the distributed computing
clients simultaneously - one (e.g. [EMAIL PROTECTED]) to hammer the FPU, and
one (e.g. a key cracking client) to hammer the integer logic.

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Re: [opensuse] how to burn my cpu?

[Patrick Kirsch]

Hey,
> 
> I googled, but only found cpuburn 1.4
> 
> While this works, it seems to be developed for PIII 450 machines. I have
> a rather modest machine by todays standards (P4, 2.8), but even starting
> multiple simultaneous instances of cpuburn  never "really" challenge my cpu.
> 
> Does anyone know of something more stressful that works on Linux?
I can think of reaim, which simulates real-work workload,
http://sourceforge.net/projects/re-aim-7/. But in your case it is maybe
better to write some program that makes use of every part of the CPU,
eg. cache cleaner (calculations with cache missing nearly 100%), vector
calculations, useless register rotating ...

BTW, if you found some please write to list :)
> 
> Thanks much and kind regards
> Eberhard
> 


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Re: [opensuse] how to burn my cpu?

[Joe Morris (NTM)]

Eberhard Roloff wrote:
> I am looking for an app that makes my CPU as hot as can be.
>   
zmd.  Just add lots of sources, and it should stress your CPU quite "well".

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Registered Linux user 231871 running openSUSE 10.2 x86_64





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Re: [opensuse] how to burn my cpu?

[Dinar Valeev]

cat /dev/zero > /dev/null
:)
be carefull cpu temp may be very hot

On 5/24/07, Eberhard Roloff <[EMAIL PROTECTED]> wrote:

Hi,

I am looking for an app that makes my CPU as hot as can be.

This is to test various things that should make my PC silently running
on a shoestring while staying stable as is.

I googled, but only found cpuburn 1.4

While this works, it seems to be developed for PIII 450 machines. I have
a rather modest machine by todays standards (P4, 2.8), but even starting
multiple simultaneous instances of cpuburn  never "really" challenge my cpu.

Does anyone know of something more stressful that works on Linux?

Thanks much and kind regards
Eberhard

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[opensuse] how to burn my cpu?

[Eberhard Roloff]

Hi,

I am looking for an app that makes my CPU as hot as can be.

This is to test various things that should make my PC silently running
on a shoestring while staying stable as is.

I googled, but only found cpuburn 1.4

While this works, it seems to be developed for PIII 450 machines. I have
a rather modest machine by todays standards (P4, 2.8), but even starting
multiple simultaneous instances of cpuburn  never "really" challenge my cpu.

Does anyone know of something more stressful that works on Linux?

Thanks much and kind regards
Eberhard

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