[Gems-users] How to compare performance of two different configurations?

[Liping Xue <lxue@xxxxxxxxxxx>]

Hi, I have a quick question about ruby_cycles.
The Protocol I used is MOESI_CMP_TOKEN;
I want to compare the ruby_cycles of two configurations:
one is single processor :
-----------------------------------------------------
     ruby0.setparam g_NUM_PROCESSORS 1
     ruby0.setparam g_PROCS_PER_CHIP 1
------------------------------------------------------
the other is two processors(2 processors on a chip)
-------------------------------------------------------
    ruby0.setparam g_NUM_PROCESSORS 2
    ruby0.setparam g_PROCS_PER_CHIP 1
-------------------------------------------------------
And other configuartions are same.
For the same application, for the first single processor configuration,
I got "Ruby_cycles: 5074917", for the second 2 processors configuration, I
got
"Ruby_cycles: 11123235". How can I compare the performance of the given
application running on different configurations? I also want to make sure
how the "Ruby_cycles" are calculated? Does it add up the total cycles of
two processors? If it is true, can I say that for the given application,
the performance are alomost same for these two configurations. (Since
11123235 /2 is close to 5074917.

Thanks for your help!

-- Liping