Thank you for the clarification. On Wed, Dec 11, 2019 at 11:40 AM Giacomo Travaglini < giacomo.travagl...@arm.com> wrote:
> The PROTOCOL env var (available in build_opts) is used in Ruby only. > For the classic memory system, MOESI is used. > > Giacomo > ------------------------------ > *From:* gem5-users <gem5-users-boun...@gem5.org> on behalf of Abhishek > Singh <abhishek.singh199...@gmail.com> > *Sent:* 11 December 2019 16:32 > *To:* gem5 users mailing list <gem5-users@gem5.org> > *Subject:* Re: [gem5-users] What is the default coherence mechanism in > gem5 for multicore systems? > > 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 < > juninho.u...@hotmail.com> 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 > > _______________________________________________ > gem5-users mailing list > gem5-users@gem5.org > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users > > IMPORTANT NOTICE: The contents of this email and any attachments are > confidential and may also be privileged. If you are not the intended > recipient, please notify the sender immediately and do not disclose the > contents to any other person, use it for any purpose, or store or copy the > information in any medium. Thank you. >
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