[Qemu-devel] qemu & kernel :address generated are non-uniform

[sparsh mittal]

Hello
I am using marss with qemu, but this question is related to qemu & kernel. When I use:

qemu-system-x86_64 -m 4G myImage.img

and print physical addresses that are passed to cache hierarchy, I see 
that the physical addresses are not in uniform range: for example:

GBrange     numberOfAddresses

0-0.5--->   3325

0.5-1--->   1253

1-1.5--->   0

1.5-2--->   30

2-2.5--->   0

2.5-3--->   1708

3-3.5--->   10521

3.5-4--->   0

4-4.5-->    15428
This phenomenon affects my work in following way: In Marss 
(cycle-accurate simulator for x86), these addresses are used to access 
cache hierarchy. If phys-addresses are in only in certain range, then, 
only few cache-set-locations will be accessed and others not. I am 
studying cache, and because of this phenomenon cache is arbitrarily used.

Can I do something to make these addresses uniform? Since it is a kernel
 issue, I don't know what can be done? I would be grateful for any help.
Sparsh