[Gems-users] about L1D_cache cache stats

["shanshuchang" <shanshuchang@xxxxxxxxx>]

Hi all,

 

I used MOESI_CMP_directory to run barnes and dump the ruby statistics results, here I have some questions:

(1) ./barnes < input_8p.8192, I have already bind the thread to the first 8 cores of my 16-p CMP system. Also I bypass the supervisor memory access to ruby so the supervisor access never misses.

 

The ruby statistic results:

 

total_misses: 394316 [ 68337 44683 45311 49304 49326 42877 42375 51622 55 55 0 0 165 0 0 206 ]
user_misses: 394316 [ 68337 44683 45311 49304 49326 42877 42375 51622 55 55 0 0 165 0 0 206 ]

 

It seems that some workload-free cores encounters some user_misses, so what are these misses stand for?(I were supposing that no user_misses for the workload-free core) 

 

(2) According to "Simics Driver Transaction Stats", there isn't any instruction request, why ?

 

Simics Driver Transaction Stats
    ----------------------------------
    Insn requests: 0
    Data requests: 410322293

 

(in simic command line, I have set instruction-fetch-mode instruction-fetch-trace.)

 

 

Thanks

shuchang