PLU CSCE Forums > Fall 2008 Forums > 371 > strassen timing revisited
Pages: [1]
« previous next »
Print
Author Topic: strassen timing revisited  (Read 1422 times)
hauser
Administrator
Newbie
*****
Posts: 149
« on: December 05, 2008, 10:18:59 AM »
I did some more tests on my office (linux) machine and on a lab (xp)
machine.  It seems there is a Just In Time optimizer installed on both machines.
You can disable it with the -Djava.compiler=NONE option to the java
command.

On the Linux machine the JIT seemed to take time to take effect.   After a
few (~5) iterations the times settled down.  When the JIT was disabled
the times were very steady from the beginning but about 10-20% bigger.

On the XP machine the times were steady from the beginning both with
and without the JIT.  Again the times without the JIT were about 10-20%
greater.

So, it seems that the odd timing I was getting was a result of the odd machine
I use.
Logged
George Hauser
munsonpm
Newbie
*
Posts: 51
« Reply #1 on: December 07, 2008, 12:42:32 PM »
So does that mean that all our computers didn't have that enabled?  I'm guessing then that it is not the default for some systems.  Why wouldn't it be enabled on our computers, but it was on the two you tried?
Logged
Sethro
Newbie
*
Posts: 17
« Reply #2 on: December 08, 2008, 02:02:16 PM »
does anyone know if there is an option to view whether it is enabled or not?
Logged
img]http://www.theellisarmor.com/Regrets_For_Burial_Banner.gif[/img]
Pages: [1]
Print
« previous next »
Jump to: