Program Optimization for dual processor machines

Altrus · 2005-09-25, 21:00

Hi,

I've recently started running Prime95 on my dual processor machine. Now I'm curious as to the steps I can take to optimize it while it runs. I've already noticed that I need to start two instances of the program (setting each affinity to a unique CPU), and set the to run on start up. However, even when I do this, only one instance starts up at boot-up, forcing me to manually spawn the other instance.

I've set the ram used by each instance to around 500MB. My questions are as follows:

a) Is there any way to have both instances start on boot-up (as opposed to only having one start?)

b) Are there any other optimizations I might make?

Major specs are:

Dual Xeon Processors (3.2GHz, 800MHz FSB) with 2GB RAM. (More detailed specs available on request).

Also somewhat off-topic, searching the Intel site I found Intel Math Libraries that claim to further optimize the running of programs on Intel Machines.

See:

http://www.intel.com/cd/software/pro...mkl/219859.htm

Does Prime95 already make use of these types of libraries?

Regards,

Altrus

JHagerson · 2005-09-25, 21:43

I don't have any problems getting two instances of Prime95 to start at bootup. You might need to go to the Options menu and turn Start at Bootup off, then go back to the same menu and turn it on. To see if Prime95 is set to start at bootup, right-click on My Computer and choose Manage. In the Computer Management window, under the heading Name, double-click Services and Applications, then double-click Services. Scroll down and verify that you have an entry for the Prime95 service and that it is set to start automatically. I have found that when I first install Prime95, I need to reboot the computer before the Start at Bootup setting "takes."

As to libraries (Intel or otherwise), the guts of Prime95 are all hand-coded assembler language. George don't use no libraries!

moo · 2005-09-25, 22:00

Are you running windows...
if yes
then disable start at bootup in prime95 and write a quick bat file and place in startup folder....

Prime95 · 2005-09-25, 23:29

Did you use the -A1 command line argument to start the second instance? I did that and have not had any problem with both starting at bootup.

Altrus · 2005-09-26, 15:19

Hi,

Thanks for the replies - simply enough, just re-clicking the "start on boot up" option was enough :-)

Altrus

2005-09-25, 21:00	#1
Altrus Sep 2005 Canada 2 Posts	Program Optimization for dual processor machines Hi, I've recently started running Prime95 on my dual processor machine. Now I'm curious as to the steps I can take to optimize it while it runs. I've already noticed that I need to start two instances of the program (setting each affinity to a unique CPU), and set the to run on start up. However, even when I do this, only one instance starts up at boot-up, forcing me to manually spawn the other instance. I've set the ram used by each instance to around 500MB. My questions are as follows: a) Is there any way to have both instances start on boot-up (as opposed to only having one start?) b) Are there any other optimizations I might make? Major specs are: Dual Xeon Processors (3.2GHz, 800MHz FSB) with 2GB RAM. (More detailed specs available on request). Also somewhat off-topic, searching the Intel site I found Intel Math Libraries that claim to further optimize the running of programs on Intel Machines. See: http://www.intel.com/cd/software/pro...mkl/219859.htm Does Prime95 already make use of these types of libraries? Regards, Altrus Last fiddled with by Altrus on 2005-09-25 at 21:06

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Program optimization	henryzz	Programming	17	2012-09-26 13:21
Benchmarking dual-CPU machines	garo	Software	2	2010-09-27 20:33
SMP on multi-processor machines	Budgie	Software	31	2007-03-09 14:12
Problems running Prime95 on a dual processor	WileECoyote	Hardware	11	2006-10-21 07:05
Dual Processor Pentium 4 runs Slow!	brodin	Hardware	5	2004-04-28 23:12

2005-09-25, 21:43	#2
JHagerson May 2005 Naperville, IL, USA 2²·7² Posts	I don't have any problems getting two instances of Prime95 to start at bootup. You might need to go to the Options menu and turn Start at Bootup off, then go back to the same menu and turn it on. To see if Prime95 is set to start at bootup, right-click on My Computer and choose Manage. In the Computer Management window, under the heading Name, double-click Services and Applications, then double-click Services. Scroll down and verify that you have an entry for the Prime95 service and that it is set to start automatically. I have found that when I first install Prime95, I need to reboot the computer before the Start at Bootup setting "takes." As to libraries (Intel or otherwise), the guts of Prime95 are all hand-coded assembler language. George don't use no libraries!

2005-09-25, 22:00	#3
moo Jul 2004 Nowhere 809 Posts	Are you running windows... if yes then disable start at bootup in prime95 and write a quick bat file and place in startup folder....

2005-09-25, 23:29	#4
Prime95 P90 years forever! Aug 2002 Yeehaw, FL 1111011100100₂ Posts	Did you use the -A1 command line argument to start the second instance? I did that and have not had any problem with both starting at bootup.

2005-09-26, 15:19	#5
Altrus Sep 2005 Canada 2 Posts	Hi, Thanks for the replies - simply enough, just re-clicking the "start on boot up" option was enough :-) Altrus