CPU mining problem... 8 cores VS 16 cores.

[ollie0108]

Hello everyone,
sorry to bother, but this question just can't get out of my mind.
I've got 3 servers now mining.(I don't have to pay for the electricity, of course)
One with 2 cores, one with 8 cores, and one with 16 cores.
I know CPU mining is much slower than GPU mining, but I have no choice
Anyway, the problem is:
My 8 core server, installed with Windows Server 2008 can hash up to 2XM/s
http://i1102.photobucket.com/albums/g452/ollie0108/8.jpg
But my 16 core and 2 core server, installed with FreeBSD, can only hash about 4~5M/s in total...
http://i1102.photobucket.com/albums/g452/ollie0108/16.jpg
Is my setting wrong? Or it's because the OS are different?
Hope y'all can help me out
Thanks

[1up]

Yea, that's doesn't sound right. Are you sure that the linux server is mining from both the 2 core and 16 core. With that slow mining, it almost seems that its only mining using the 2 core only.

[ollie0108]

Yea, that's doesn't sound right. Are you sure that the linux server is mining from both the 2 core and 16 core. With that slow mining, it almost seems that its only mining using the 2 core only.

I thought the thread number is same as the working cores?
How can I make sure

[ollie0108]

Anybody?
Please help me=(
Or I can only blame it to OS?
But how come Linux is slower than Wins

[runlinux]

does your install see all the cores ? (16)?  if so, did you throw it the -t 16 for 16 threads?

i get about 25mh/s on my dual QX9775's at 3.2 (8 threads)

[ollie0108]

does your install see all the cores ? (16)?  if so, did you throw it the -t 16 for 16 threads?

i get about 25mh/s on my dual QX9775's at 3.2 (8 threads)

Yes, my install can see all the cores(top -P, right?)

CPU: Intel(R) Xeon(R) CPU           E5520  @ 2.27GHz (2266.76-MHz 686-class CPU)
FreeBSD/SMP: Multiprocessor System Detected: 16 CPUs
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
 cpu2 (AP): APIC ID:  2
 cpu3 (AP): APIC ID:  3
 cpu4 (AP): APIC ID:  4
 cpu5 (AP): APIC ID:  5
 cpu6 (AP): APIC ID:  6
 cpu7 (AP): APIC ID:  7
 cpu8 (AP): APIC ID: 16
 cpu9 (AP): APIC ID: 17
 cpu10 (AP): APIC ID: 18
 cpu11 (AP): APIC ID: 19
 cpu12 (AP): APIC ID: 20
 cpu13 (AP): APIC ID: 21
 cpu14 (AP): APIC ID: 22
 cpu15 (AP): APIC ID: 23

I didn't throw -t 16 to it, but it seems like the program did that for me because it showed
[2011-08-18 10:17:38] 16 miner threads started, using SHA256 'c' algorithm.
Don't know if I got it wrong

And I just tried to throw -t 16 to it, doesn't change anything
Are you using Jgarzik + FreeBSD also?