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Stupid multi-core questions

P

PenaltyShot

Gawd
Joined
Sep 4, 2002
Messages
964
Coming from a P4, I'm sort of a noobie when it comes to dual or quad cores. I've searched the Net and for some reason can't find the answers to these questions anywhere:

1. My new WinXP office machine has an E6400. It showed only one core running in CPU-Z, and one graph in Task Manager/Performance. Therefore I assume that one core is disabled and my PC is "crippled" a bit, not performing at its full multicore potential. Is this correct?

2. I poked around and found the /NUMPROCS parameter in the BOOT.INI/Advanced section of msconfig. Set the number of procs to 2 and rebooted. Now it shows 2 cores. Was that actually the correct way to solve the problem, though? It's strange that I find very little reference to this switch on the Net. If that wasn't the correct solution, then what is?

3. Do any of you guys ever need to set the Affinity for one CPU or another with any of your apps? Just wondering.

Thanks
PS
 
let windows worry about the affinity.

if you put a dual core into a board that had a single core, yes you usually need to do some fixing, like a reinstall or changing something under system to make it show up.
 
Actually, these are brand new systems, so no CPU replacement there. I figure it somehow must have been the way the Ghost image for XP was configured by the IT people.
 
^^^ that is likely, they are using the , ummm, crap, starts with an S something you can do with an image so it will work on any hardware, tey did it on a single core systems.
 
PenaltyShot said:
Coming from a P4, I'm sort of a noobie when it comes to dual or quad cores. I've searched the Net and for some reason can't find the answers to these questions anywhere:

1. My new WinXP office machine has an E6400. It showed only one core running in CPU-Z, and one graph in Task Manager/Performance. Therefore I assume that one core is disabled and my PC is "crippled" a bit, not performing at its full multicore potential. Is this correct?

2. I poked around and found the /NUMPROCS parameter in the BOOT.INI/Advanced section of msconfig. Set the number of procs to 2 and rebooted. Now it shows 2 cores. Was that actually the correct way to solve the problem, though? It's strange that I find very little reference to this switch on the Net. If that wasn't the correct solution, then what is?

3. Do any of you guys ever need to set the Affinity for one CPU or another with any of your apps? Just wondering.

Thanks
PS
Click to expand...

If you were running a p4 then dropped in a new board and cpu and didn't re-install you need to upgrade the ACPI to be multi-processor if its not already.

http://support.microsoft.com/kb/234558/en-us
 
I think I might have confused this thread by starting out stating that I'm coming from a P4 and am relatively new to multicore setups. People are thinking that I'm replacing my P4 CPU with a multicore CPU in the same motherboard.

What I meant was, I have a P4 system at home (well, HAD, until it just died recently). That's my home system. I was just saying that my experience level with multicore procs is a little lacking.

Meanwhile at the office, we're getting in some brand new C2D-based Dell systems. While working on one, I noticed it was running on only a single core.

I've alerted the guys that create our OS images of the situation. But my main questions are still:

1. If only one processor shows up in CPU-Z, that means that one core is disabled, I assume. It's not using both cores as one single processor -- it's just NOT using one of the cores at all. Right?

2. Was going into the BOOT.INI, Advanced options, and setting the /NUMPROCS parameter the proper way to fix this? It did seem to work. CPU-Z shows 2 procs now. But I'm always wary of doing fixes through msconfig, since sometimes that's sort of a band-aid way to fix things which could have been fixed in a cleaner way.
 
1. They shoudl make a new image using a multicore rig, it is simply windows not seeing the 2nd core because the OS was installed and imaged on a single core rig.

2. there is another way to do it but i cant recall.
 
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