[Gems-users] The distribution of "total_misses" in ruby stats output

["Lide Duan" <leaderduan@xxxxxxxxx>]

I found something strange when looking at the ruby stats output files. I am simulating some 16p checkpoints. If I place all the 16p on a single chip (g_PROCS_PER_CHIP 16), the results related to cache misses are shown as follow:

Total_misses: 2537939
total_misses: 2537939 [ 2537939 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ]
user_misses: 1763423 [ 1763423 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ]
supervisor_misses: 774516 [ 774516 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ]

I suppose the 16 numbers in the brackets correspond to the misses on each processor, but as we can see only misses on the 1st processor were observed. On the other hand, I also got the followings:

instruction_executed: 1322569080 [ 82094180 83437607 81021513 81093394 82632809 122205588 82083483 80671650 81138678 80191395 79408095 79763896 81353502 81528474 62244475 81700341 ]
cycles_per_instruction: 4.63392 [ 4.66589 4.59077 4.72767 4.72348 4.63548 3.13441 4.6665 4.74817 4.72084 4.77661 4.82372 4.80221 4.70837 4.69827 6.15384 4.68839 ]
misses_per_thousand_instructions: 1.91895 [ 30.915 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 ]

So definitely all the processors were running something, but why were the misses on the 1st processor observed only?

To address this problem, I tried different configurations. If I place the processors on 4 chips each containing 4p, the first 4 numbers in the total_misses brackets are not zeros. Also, if one processor on one chip (totally 16 chips), all the 16 numbers are not zeros. Therefore, I guess the numbers indicate the misses on each CHIP, not each processor. Am I right? or did I miss something here? Actually I tried different workloads with different network topologies, but got the similar results. Can anybody give me some explanation?

Thanks,
Lide