Performance on multicore vs single core
Posted on 2008-10-29
We are seeing some significant performance differences on single vs
multi-core processors on AMD chips.
We have a database application that we are running on XP which also
does regression analysis.
I have asked the manufacturer of the software if they have seen this,
but they have not. They are using Clarion from SoftVelocity to build
on some systems I know the core others I do not
AMD Athlon Socket 939 (single) 4000+ 102 secs
AMD Athlon 64 X2 (Toledo) (single) 4800+ 145 secs
AMD Athlon 64 (Unknown) (dual) 3500+ 184 secs
AMD Black Edition (Brisbane) (dual) 5000+ 780 secs
(Overclocked to 3GHz)
AMD Athlon 64 (Brisbane) (dual) 5200 +
AMD Quad Phenom 9950 810 secs
We then installed the application on an operating system installed as
guest in VMWare
AMD Quad Phenom 9950 92 secs
Any idea on what is going on here. This really doesn't make sense. I
would expect maybe a little performance hit but 5 to 6 times
The only hint I can see of the issue may be the run made on the
Toledo. While it's clock speed is faster It's performance is still
worse than a 4000+. My understanding is that a Toledo is a dual core
with one core disabled.
The software being used in these tests were written using SoftVelocity/Clarion. I will more than likely post a specific problem to the Clarion group, because although the problem is different I think it may be related.
But, this is not the only software in use where we are seeing the problem. This is just the software that is causing the most problem.