MAGMA Forum

Posted: **Tue Apr 19, 2011 4:15 pm**

Hello,

I have been able to compile magma on my machine and I am running some tests from the "testing" directory. When I ran "testing_dsyevd", I get these results:

Code: Select all

device 0: Tesla C2070, 1147.0 MHz clock, 5375.2 MB memory
device 1: Tesla C2050, 1147.0 MHz clock, 2687.4 MB memory

Usage:
  testing_dsyevd -N 1024



  N     CPU Time(s)    GPU Time(s)     ||R||_F / ||A||_F
==========================================================
 1024       0.25           0.20         0.000000e+00 2.054667e-15
 2048       1.68           1.32         5.880427e-16 8.679861e-14
 3072       5.70           3.67         4.055110e-16 4.497512e-13

Message from syslogd@ at Tue Apr 19 15:11:53 2011 ...
lady kernel: CPU2: Temperature above threshold, cpu clock throttled

Message from syslogd@ at Tue Apr 19 15:11:53 2011 ...
lady kernel: CPU1: Temperature/speed normal

Message from syslogd@ at Tue Apr 19 15:11:53 2011 ...
lady kernel: CPU0: Temperature/speed normal

Message from syslogd@ at Tue Apr 19 15:11:53 2011 ...
lady kernel: CPU3: Temperature/speed normal
 4032      13.01           7.71         5.151417e-16 2.195313e-12
 5184      29.13          15.14         1.169635e-16 4.566724e-13
...etc...

Does anyone have an idea about what the temperature messages mean? Should I be worried about this?

Thanks,
Jeremiah

Posted: **Tue Apr 19, 2011 4:17 pm**

I have ran a few other testing_* executables and get the temperature message there as well.

Posted: **Wed Apr 20, 2011 10:31 am**

Hi,

it's not related to MAGMA. You are just stressing you CPUs when you run these testings and so, the system is adjusting the CPU clock in relation to the temperature reported by sensors.

Mathieu

Posted: **Wed Apr 20, 2011 12:06 pm**

Thanks for your reply. How am I "stressing" my CPUs? How do I avoid this? (Or should I?)

Posted: **Wed Apr 20, 2011 4:18 pm**

What can I say ? Don't run magma testings

.

This is not a problem, your system is just adjusting the CPU accorded to the sensors. MAGMA testings dsyevd is an hybrid kernel using CPU and GPU, so the BLAS called on the CPU just "stress" the system and by consequence increase the temperature.

Mathieu

Posted: **Thu Jun 30, 2011 9:15 am**

Hi, Mathieu!

What do you mean by saying "MAGMA testings dsyevd is an hybrid kernel using CPU and GPU"? Is it possible to run "dsyevd" by using GPU only?

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