Re: [Gems-users] L2 Miss Profiling

[Dan Gibson <degibson@xxxxxxxx>]

It is not out of the question that there might be profiling problems with MESI_CMP_filter_directory. However, lets cover the basics first:
- What are your cache sizes?
- What is the workload?
- For how long are you running the simulation?

Regards,
Dan

On Thu, Apr 8, 2010 at 10:52 AM, Nilay Vaish <nilay@xxxxxxxxxxx> wrote:

Hi

I am using GEMS for studying effect of L2 cache parameters on performance of CMPs. Right now I am using the protocol MESI_CMP_filter_directory. The L2 misses obtained as output is suspiciously close to the sum of L1D and L1I cache misses. I am quoting the misses obtained for a 16 processor machine.

L1D_cache cache stats:
 L1D_cache_total_misses: 1334256
 L1D_cache_total_demand_misses: 1334256

L1I_cache cache stats:
 L1I_cache_total_misses: 2010
 L1I_cache_total_demand_misses: 2010

L2_cache cache stats:
 L2_cache_total_misses: 1336262
 L2_cache_total_demand_misses: 1336262

Has anyone used GEMS for profiling L2 misses? What might be going on wrong here?

--
Nilay

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