Re: [Gems-users] Off-chip accesses

[Mike Marty <mikem@xxxxxxxxxxx>]

Yes, you can count off-chip accesses like you suggest. 

--Mike

pana wrote:
> Hello all,
>
> I'm using simics + ruby to simulate a CMP system with: 8 CPUs, 16MB 
> shared L2 cache, MOESI_CMP_NUCA protocol.
> I need to count the off-chip accesses from my L2 cache to RAM memory, 
> (memory controller is called Directory)
> I found in the Slicc file "MOESI_CMP_NUCA-dir.sm <http://dir.sm>" the 
> TRANSITIONs which perform ACTIONs with "latency = MEMORY_LATENCY"  and 
> I have counted the their total number showed in ruby stats file.
> I found a very low number of off-chip accesses in comparison with the 
> number of misses.
> actions:
> - action(d_sendDataWithAllTokens, "d", desc="Send data and tokens to 
> requestor")
> - action(dd_sendDataWithAllTokensToStarver, "\d", desc="Send data and 
> tokens to starver")
> transactions:
> - transition(M, GETX, NO)
> - transition(M, GETS, NO)
> - transition(M, Lockdown, L)
> - transition(O, GETX, NO)
> - transition(O, GETS, NO)
>
>
> Is this procedure correct to calculate off-chip accesses?
>
>
> francesco
>
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