[Gems-users] Number of instruction executed in GEMS for CMPs

[Shoaib Altaf <shoaibbinalt@xxxxxxxx>]

List,

 

I was comparing some results between a single processor and a CMP (say 4 processors), and the criteria depends on the number of cycles. I am running for 350 M instructions like this for both cases

c 350000000

 

Now on the output stat file I got these results.....

 

1 Processor:

 

instructions executed =350000000 

Ruby cycles= 1435639304

 

 

4 Processors:

 

instructions executed =1449213046 (roughly 1500 M)

Ruby cycles = 1861225208

 

 

So I have these questions :

 

1) I was expecting the instructions executed to be the same why they are different?? in the present scenario the comparison will  not matter....so how should I make sure that the CMP will also run for 350 M instructions

 

2) I was also expecting that the ruby cycles will also reduce in case of 4 processors, but they have increased since more instructions are executed ..Why??

 

3) My protocol is MSI_MOSI_CMP  and workload is OLTP.

 

Shoaib