Hi,
The default is MI protocol in classic cache model, there are various
protocols which you can find in build_opts directory.
Also, you can find the build info by using —build-info flag.
For example ./build/X86/gem5.opt —build-info

On Wed, Dec 11, 2019 at 10:11 AM Francisco Carlos <[email protected]>
wrote:

> Hi all,
>
> I am currently running simulation in a multicore processor. I connect the
> memory system as follow:
>
> for i in range(np):
>     system.cpu[i].icache = L1_ICache()
>     system.cpu[i].dcache = L1_DCache()
>     system.cpu[i].icache.connectCPU(system.cpu[i])
>     system.cpu[i].dcache.connectCPU(system.cpu[i])
>
> system.l2cache = L2Cache()
> system.l2bus = L2XBar()
>
> #np means number of processor and it is a parameter
> for i in range(np):
>     system.cpu[i].icache.connectBus(system.l2bus)
>     system.cpu[i].dcache.connectBus(system.l2bus)
> system.l2cache.connectCPUSideBus(system.l2bus)
> system.l2cache.connectMemSideBus(system.membus)
> In summary, to each core I have private Icache and Dcache which are
> connected to an L2 shared cache.
>
> So, my question is: how is the coherence guaranteed in the system, since I
> do not provide this information in my configuration file? Is there a
> default coherency used in the gem5? If so, which is it?
>
> Thanks in advance.
>
>
> ----------------------------------------------------------------------------------------------------------------------------------------------
> Francisco Carlos Silva Junior
> Ph.D student at University of Brasilia
>
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