More about CMP configuration
If I only simulate a single CMP, can I ignore
"g_NETWORK_TOPOLOGY: FILE_SPECIFIED
NUMBER_OF_VIRTUAL_NETWORKS: 5" ?
I am still not sure about TIMING parameters:
Your "target system parameters" and my guessing
interconnect latency 2ns => ON_CHIP_LINK_LATENCY: 2
memory/dir controller 6ns => ???
L1 2ns => L1_BANK_LATENCY_MINUS_1: 1
& L1_REQUEST_LATENCY: 1
L2 7ns => L2_BANK_LATENCY_MINUS_2: 5
& L2_REQUEST_LATENCY: 5
latency to controller 20 ns => ???
DRAM latency 80ns => MEMORY_LATENCY: 80
Do we need to changes other timing parameters?
following is all the timing parameters in rubyconfig.defaults
// TIMING PARAMETERS
NULL_LATENCY: 1
ISSUE_LATENCY: 2
CACHE_RESPONSE_LATENCY_MINUS_1: 11
MEMORY_LATENCY: 80
DIRECTORY_LATENCY: 80
NETWORK_LINK_LATENCY: 14
COPY_HEAD_LATENCY: 4
ON_CHIP_LINK_LATENCY: 1
RECYCLE_LATENCY: 10
L2_RECYCLE_LATENCY: 5
TIMER_LATENCY: 10000
// for a 3 cycle L1 cache
L1_BANK_LATENCY_MINUS_1: 2
// for a 6 cycle L2 cache bank
L2_BANK_LATENCY_MINUS_2: 4
TBE_RESPONSE_LATENCY: 1
PERIODIC_TIMER_WAKEUPS: true
// constants used by CMP protocols
// cache bank access times
L1_REQUEST_LATENCY: 2
L2_REQUEST_LATENCY: 4
// Allows on a single accesses to a multi-cycle L2 bank.
// Ensures the cache array is only accessed once for every L2_REQUEST_LATENCY
// number of cycles. However the TBE table can be accessed in parallel.
SINGLE_ACCESS_L2_BANKS: true
// Ruby cycles between when a sequencer issues a request and it arrives at
// the L1 cache controller
SEQUENCER_TO_CONTROLLER_LATENCY: 4
On Sat, 5 Mar 2005 23:34:12 -0600, Weihang Jiang
<weihang.jiang@xxxxxxxxx> wrote:
> Thank you so much :)
>
>
> On Sat, 5 Mar 2005 23:29:36 -0600 (CST), Mike Marty <mikem@xxxxxxxxxxx> wrote:
> > DirectoryCMP in my HPCA paper used the MOESI_CMP_directory SLICC protocol
> >
> > Make the following changes to rubyconfig.defaults:
> >
> > g_NETWORK_TOPOLOGY: FILE_SPECIFIED
> > NUMBER_OF_VIRTUAL_NETWORKS: 5
> >
> > In Simics, the following parameters must be set for a 4 CMP, 4 procs/chip
> > system (total 16 processors)
> >
> > ruby0.setparam g_endpoint_bandwidth 1000
> > ruby0.setparam g_PROCS_PER_CHIP 4
> > ruby0.setparam g_NUM_PROCESSORS 16
> >
> > I think this should work.
> >
> > --Mike
> >
> >
> > > Dear Mike,
> > > I am trying to configure a single-CMP system in GEMS/SIMICS. But I
> > > am not sure whether I have configured all the parameters listed in
> > > file rubyconfig.defaults correctly.
> > > I just noticed that you had a M-CMP setup in your HPCA05
> > > paper,which is close to the system I want. If you still keep the
> > > configuration file, could you please help me?
> > > TIA
> > > --
> > > Weihang Jiang
> > >
> >
>
> --
> Weihang Jiang
>
--
Weihang Jiang
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