[Gems-users] Read Cache Data values directly from Simics

["Siddharth Rajiv Inamdar" <sri3@xxxxxxxxxxx>]

Hi
I was wondering if anyone knows how to read cache data values directly
from SIMICS. Given that ruby does not actually store data, does anyone
know how to get data from the cache?

i've tried using the SIMICS_read_physical_memory_buffer (under
ruby/interfaces/interface.C) which in turn calls SIM_read_phys_memory
(under
ruby/simics/simics_api_dummy.C) which always returns false. I guess the
fact that the file is a 'dummy' file should explain things, but is there a
reason that the SIMICS_read_physical_memory_buffer function was developed?
If this cant be used, is there any other way to access data values in the
cache?

Any help would be GREATLY appreciated!
thanks
sid



> Hello,
>
> I'm trying to set Opal up to simulate a cache heiarchy with the following
> parameters:
>
>   Cache-to-cache latency - 400 cycles
>   L1 hit latency - 2 cycles
>   L2 hit latency - 24 cycles
>   Memory access latency - 460 cycles
>
> The latter two seem obvious:
>   opal0.setparam L2_LATENCY 24
>   opal0.setparam MEMORY_DRAM_LATENCY 460
>
> The L1 latency is more problematic... the options are a bit similar.
>
> Is the
>   opal0.setparam L1_FILL_BUS_CYCLES
> option what I want?
>
> What should L2_FILL_BUS_CYCLES be in this case?
>
> I've been going through the default config files and also the code itself
> but am a bit confused by what's going on...
>
> Thanks,
>
> Vince
>
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