Hi Andreas, Thanks for the info, does it also apply for the Classic Memory System? I was thinking that there was a bus between CPU and L1 with some width and some frequency, for example 64bit and 2GHz. I wanted to test two different systems and compare the performance between them:
1) CPU (2GHz) <--------[bus 64 width, 2GHz]---------> L1 (2GHz) ->to L2 2) CPU (2GHz) <--------[bus 32 width, 4GHz]---------> L1 (4GHz) ->to L2 Do you think that I cannot use gem5 to do this experiment? Thanks again, Pavlos On Fri, 2012-11-23 at 14:14 +0000, Andreas Hansson wrote: > Hi Pavlos, > > There is no bus between the CPU core and the L1, just a "port" connection. > The PIO bus is only used for PIO, and should not have a great impact on > your benchmark unless it is very I/O intensive. > > Andreas > > On 23/11/2012 12:29, "Pavlos Maniotis" <[email protected]> wrote: > > >Hello everyone, > > > >I use ruby (MOESI_CMP_directory) and I want to simulate a system > >with one CPU (frequency=2GHz) and L1 and L2 caches (frequency=4GHz). > >I also want the bus between cpu and cache > >to run at 4GHz with width 32 bits. So I have to set the cpu > >frequency equal to 4GHz (ruby_fs.py -> CPUClass.clock = '2GHz') > >and ruby frequency equal to 2GHz > >(Ruby.py -> system.ruby = RubySystem(clock = 4, > > stats_filename = options.ruby_stats, > > no_mem_vec = options.use_map)). > > > >I suppose these changes are right, my main concern is: > > > >Do I have to change system.piobus frequency > >to 4GHz and width to 4 bytes (file FSConfig.py, function > >makeLinuxAlphaRubySystem)? > >Is this the bus between cpu and L1 cache? If it is not > >how can I configure the bus between L1 and CPU? > > > >I am little bit confused about the interconnection system. > > > >Thanks in advance for any help, > >Pavlos > > > > > >_______________________________________________ > >gem5-users mailing list > >[email protected] > >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. > > _______________________________________________ > gem5-users mailing list > [email protected] > http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users _______________________________________________ gem5-users mailing list [email protected] http://m5sim.org/cgi-bin/mailman/listinfo/gem5-users
