[Gems-users] R: "assertion fault"

["Alessandro Bardine" <alessandro.bardine@xxxxxxxxxxxx>]

Thank you for your reply.
I have tried both with

ruby0.setparam L2_CACHE_NUM_SETS_BITS 12

than with

ruby0.setparam L2_CACHE_NUM_SETS_BITS 16

and I am still getting the same "assertion fault"

b.t.w. when I dump the stats I got

...
L2_CACHE_NUM_SETS_BITS 4
...

in the first case and

L2_CACHE_NUM_SETS_BITS 8

in the second case
(that seems to be log2(g_NUM_L2_BANKS)- L2_CACHE_NUM_SETS_BITS beeing this
the one I set).


> -----Messaggio originale-----
> Da: gems-users-bounces@xxxxxxxxxxx
> [mailto:gems-users-bounces@xxxxxxxxxxx]Per conto di Alaa Alameldeen
> Inviato: mercoledi 8 marzo 2006 17.57
> A: Gems Users
> Oggetto: Re: [Gems-users] "assertion fault"
>
>
> The parameter L2_CACHE_NUM_SETS_BITS should be bigger than the number of
> bits required to address an L2 bank. Since you have g_NUM_L2_BANKS=256,
> you need 8 bits to map an address to an L2 bank, and the remaining bits
> are used to map to a set. So your L2_CACHE_NUM_SET_BITS should be at
> least nine (though obviously you want it to be bigger since you want
> more than one or two blocks for each cache bank).
>
> Another alternative is to reduce the number of cache banks.
>
> -Alaa
>
> Alessandro Bardine wrote:
> > I am using gems (MOESI_CMP_NUCA) with the following parameters
> and commands:
> > istc-disable
> > dstc-disable
> > instruction-fetch-mode instruction-fetch-trace
> > load-module ruby
> > load-module opal
> > ruby0.setparam g_NUM_PROCESSORS 8
> > ruby0.setparam g_PROCS_PER_CHIP 8
> > ruby0.setparam L1_CACHE_NUM_SETS_BITS 8
> > ruby0.setparam L1_CACHE_ASSOC 4
> > ruby0.setparam g_NUM_L2_BANKS 256
> > ruby0.setparam L2_CACHE_NUM_SETS_BITS 8
> > ruby0.setparam L2_CACHE_ASSOC 4
> > ruby0.setparam_str g_NETWORK_TOPOLOGY FILE_SPECIFIED
> > ruby0.setparam_str g_DYNAMIC_TIMEOUT_ENABLED false
> > ruby0.setparam_str REMOVE_SINGLE_CYCLE_DCACHE_FAST_PATH true
> > ruby0.setparam_str g_CACHE_DESIGN NUCACOL
> > ruby0.setparam_str g_adaptive_routing false
> > ruby0.setparam NUMBER_OF_VIRTUAL_NETWORKS 7
> > ruby0.setparam g_endpoint_bandwidth 1000
> > ruby0.setparam_str g_NUCA_PREDICTOR_CONFIG DNUCA
> > ruby0.setparam_str ENABLE_MIGRATION true
> > ruby0.setparam_str COLLECTOR_HANDLES_OFF_CHIP_REQUESTS true
> > ruby0.setparam_str PERFECT_DNUCA_SEARCH true
> > ruby0.init
> > opal0.init
> > opal0.sim-start "output-dnuca.opal"
> > opal0.sim-step 3
> > ruby0.dump-stats "output-dnuca.ruby"
> > opal0.stats
> >
> >
> > and I get the following error when the sim-step starts:
> >
> > ...
> >
> > opalinterface: doing notify callback
> > Opal: opal-ruby link established.
> > OpalInterface: installation successful.
> > [0]     PC 0x418634     NPC 0x4185e4    ctx 0x0
> > [1]     PC 0x418618     NPC 0x41861c    ctx 0x0
> > [2]     PC 0x418624     NPC 0x418628    ctx 0x0
> > [3]     PC 0x418610     NPC 0x418614    ctx 0x0
> > [4]     PC 0x418618     NPC 0x41861c    ctx 0x0
> > [5]     PC 0x418628     NPC 0x41862c    ctx 0x0
> > [6]     PC 0x41860c     NPC 0x418610    ctx 0x0
> > [7]     PC 0x418620     NPC 0x418624    ctx 0x0
> > failed assertion 'L2bank < RubyConfig::numberOfL2CachePerChip()/2' at fn
> > MachineID map_L1CacheMachId_to_L2CacheLocalBank(const Address&, const
> > MachineID&) in slicc_interface/RubySlicc_ComponentMapping.h:171
> > failed assertion 'L2bank < RubyConfig::numberOfL2CachePerChip()/2' at fn
> > MachineID map_L1CacheMachId_to_L2CacheLocalBank(const Address&, const
> > MachineID&) in slicc_interface/RubySlicc_ComponentMapping.h:171
> > At this point you might want to attach a debug to the running
> and get to the
> > crash site; otherwise press enter to continue
> > PID: 26055
> >
> > Now i try to dump the ruby stats I get a file containing:
> >
> > ...
> > L2_CACHE_NUM_SETS_BITS 0
> > ...
> >
> > I have tried various L2 cache size for block and associativity
> but I always
> > get the same error.
> > Where am I wrong?
> >
> > _______________________________________________
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