Re: [Gems-users] Multi-processor cache statistics

[Philip Garcia <pcgarcia@xxxxxxxx>]

what protocol are you using?  In some of the SMP protocols, L1 cache  
statistics aren't known by Ruby (as L1 requests don't get forwarded to  
Ruby).   In some of the other protocols, the statistics can be  
lacking.  I use MOESI_CMP_directory_m for all my simulations, and when  
reading back the statistics I get back the following for a 4 processor  
CMP containing a coprocessor 5th node:  total_misses: 44345395  
[ 5451569 5242672 5426253 5324446 22900455 ], where the numbers are  
broken down based on per node statistics.  I am not 100% sure if those  
statistics are in the vanilla version of Ruby or just my own (I've  
made a number of modifications to it), but often times, I've found the  
easiest way to get statistics is to add them myself to Ruby, as every  
simulation run tends to have different needs.  For instance, the  
protocol I use doesn't give me per processor L1 statistics, despite  
all L1 accesses going to Ruby.  Figuring them out tends to be fairly  
simple though.
Phil

On Dec 10, 2009, at 1:35 AM, Vishal Oliyil Kunnil wrote:

> Hi all,
>
> I am trying to simulate a two processor  serengeti target, along  
> with Ruby.
> I am not sure i interpret correctly, a ruby0.dump-stat does not seem  
> to provide
> statistics for the individual processor caches. Is there any way to  
> dump per processor
> cache statistics ?
>
> Thanks,
>
> Regards,
> Vishal
>
> --------snip ---------------
> The configuration file settings  are:
>
> L1_CACHE_ASSOC: 4
> L1_CACHE_NUM_SETS_BITS: 12
> L2_CACHE_ASSOC: 4
> L2_CACHE_NUM_SETS_BITS: 18
>
>
> g_MEMORY_SIZE_BYTES: 536870912
> g_DATA_BLOCK_BYTES: 64
> g_PAGE_SIZE_BYTES: 8192
> g_REPLACEMENT_POLICY: PSEDUO_LRU // currently, only other option is  
> LRU
> g_PROCS_PER_CHIP: 1
>
>
> // set automatically
> g_NUM_PROCESSORS: 2
> g_NUM_L2_BANKS: 0
> g_NUM_MEMORIES: 0
>
> -------snip-------------------
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