Re: [Gems-users] Physical Memory Parameters

[Brinda Ganesh <brinda_ganesh@xxxxxxxxx>]

Hi 

Im trying to create a network with more directories
than memory modules... 

The network setup that I have currently looks like
this 
is named  
NUCA_Procs-2_ProcsPerChip-1_L2Banks-2_Memories-1.txt
The file contents are as below

processors:2
procs_per_chip:1
L2banks:2
memories:1
bw_unit:10000

ext_node:L1Cache:0 int_node:0 link_latency:1
bw_multiplier:64
ext_node:Directory:0 int_node:0 link_latency:40
bw_multiplier:10
int_node:0 int_node:1 link_latency:40 bw_multiplier:16

ext_node:L1Cache:1 int_node:1 link_latency:1
bw_multiplier:64
ext_node:Directory:1 int_node:1 link_latency:40
bw_multiplier:1

The last Directory's link presence causes the first
error I mentioned in my earlier email while its
absence causes an error later on.

This file is only for the 2 processor case - but I
definitely would like to extend it to the 4/8
processor case as well. 

The arguments that I use for the tester are 

tester.exec -p 2 -l 500 -v med -s n

Thanks
Brinda


--- Bradford Beckmann <beckmann@xxxxxxxxxxx> wrote:

> 
> Brinda,
> 
> Mike is right.  The HIERARCHICAL_SWITCH network
> assumes that the number of
> memories equals the number of chips.  This is
> because the hierarchical
> switch builds an ordered network among multiple
> chips assuming each chip
> has a separate memory controller.  Actually, this
> probably is something we
> can easily fix in our next release, but currently
> GEMS is limited that
> all auto-generated networks must have a number of
> memories >= the number
> of chip.
> 
> As far as your problem with the FILE_SPECIFIED
> network, are you trying to
> create a network with more directories but the
> g_NUM_MEMORIES equals one?
> Can you send us the file you are using and the
> command line arguments you
> are passing the tester?
> 
> Brad
> 
> 
> 
> On Thu, 21 Jul 2005, Brinda Ganesh wrote:
> 
> > I created a network file similar to the ones in
> the
> > network/simple/Netowrk_Files. I set the number of
> > memories to 1 in this file. I am using  2
> processors
> > and a modified form of the MOESI_SMP_directory
> > protocol.
> >
> > The netowrk type is specified as FILE_SPECIFIED.
> >
> > The network initialization crashes if I specify a
> link
> > for more than 1 Directory.
> > failed assertion 'nodes[i] >= 0 && nodes[i] <
> m_nodes'
> > at fn void Topology::makeFileSpecified() in
> > network/simple/Topology.C:511
> >
> > If I specify only one directory I get the crash
> that
> > occurred earlier with the Hierarchial switch
> network
> > type.
> > failed assertion 'id < m_nodes' at fn void
> > SimpleNetwork::checkNetworkAllocation(NodeID,
> bool,
> > int) in network/simple/SimpleNetwork.C:199
> >
> > This seems to be related to a call from
> > getToNetworkQueue being called during chip
> > initialization.
> >
> > Im a little confused about whether its the way my
> > network file is being specified which is causing
> the
> > error or if there is some other parameter I need
> to
> > change as well.
> >
> > Thanks
> > Brinda
> >
> > --- Brinda Ganesh <brinda_ganesh@xxxxxxxxx> wrote:
> >
> > > Im using the HIERARCHICAL_SWITCH network.
> > > Thanks
> > > Brinda
> > >
> > > --- Mike Marty <mikem@xxxxxxxxxxx> wrote:
> > >
> > > > > How does ruby pass back the installed memory
> > > size
> > > > > information back to simics? Im assuming that
> > > this
> > > > > information is conveyed somehow so that the
> os
> > > can
> > > > > swap things in and out of disk if the
> virtual
> > > > memory
> > > > > size gets larger than the installed physical
> > > > memory
> > > > > size.
> > > > >
> > > >
> > > > Ruby doesn't pass this information to Simics. 
> You
> > > > have to configure Ruby
> > > > to match the installed memory in your Simics
> > > > checkpoint that you load.
> > > >
> > > > > I tried resetting the number of memories to
> 1 so
> > > > that
> > > > > it was not equal to the number of processors
> (2)
> > > > in
> > > > > the system but it causes the system to
> crash...
> > > Is
> > > > > there some other parameter tha t I need to
> > > reset?
> > > > >
> > > >
> > > > Hmm....what NETWORK_TOPOLOGY?  Its possible
> that
> > > our
> > > > auto-generated
> > > > networks assume that the # memories == #
> > > processors.
> > > >  But I'll have to
> > > > check the code for this.  Regardless you can
> > > create
> > > > a network file by hand
> > > > if you need to.
> > > >
> > > >
> > > >
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> > >
> > >
> > >
> > >
> >
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