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This patch changes the router pipeline stages from 4 to 2. The
canonical 4-stage router is conservative while a lower-latency router
with look ahead routing and speculative allocation is well acknowledged.
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Sets m_stage.second to the second parameter of the function.
Then, for every place where advance_stage is called, adds
a cycle to the argument being passed.
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At several places, there are functions that take a cycle value as input
and performs some computation. Along with each such function, another
function was being defined that simply added one more cycle to input and
computed the same function. This patch removes this second copy of the
function. Places where these functions were being called have been updated
to use the original function with argument being current cycle + 1.
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Due to recent changes to clocking system in Ruby and the way Ruby restores
state from a checkpoint, garnet was failing to run from a checkpointed state.
The problem is that Ruby resets the time to zero while warming up the caches.
If any component records a local copy of the time (read calls curCycle())
before the simulation has started, then that component will not operate until
that time is reached. In the context of this particular patch, the Garnet
Network class calls curCycle() at multiple places. Any non-operational
component can block in requests in the memory system, which the system
interprets as a deadlock. This patch makes changes so that Garnet can
successfully run from checkpointed state.
It adds a globally visible time at which the actual execution started. This
time is initialized in RubySystem::startup() function. This variable is only
meant for components with in Ruby. This replaces the private variable that
was maintained within Garnet since it is not possible to figure out the
correct time when the value of this variable can be set.
The patch also does away with all cases where curCycle() is called with in
some Ruby component before the system has actually started executing. This
is required due to the quirky manner in which ruby restores from a checkpoint.
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This patch was initiated so as to remove reference to g_system_ptr,
the pointer to Ruby System that is used for getting the current time.
That simple change actual requires changing a lot many things in slicc and
garnet. All these changes are related to how time is handled.
In most of the places, g_system_ptr has been replaced by another clock
object. The changes have been done under the assumption that all the
components in the memory system are on the same clock frequency, but the
actual clocks might be distributed.
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This patch removes RubyEventQueue. Consumer objects now rely on RubySystem
or themselves for scheduling events.
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Rename the ruby/network/garnet-foo directories to garnet/foo.
Move the common NetworkHeader.hh file from garnet-fixed-pipeline
up to the common garnet directory.
Fix up include paths.
--HG--
rename : src/mem/ruby/network/garnet-fixed-pipeline/NetworkHeader.hh => src/mem/ruby/network/garnet/NetworkHeader.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/CreditLink_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/CreditLink_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/GarnetNetwork_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/GarnetNetwork_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/InputUnit_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/InputUnit_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/InputUnit_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/InputUnit_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/NetworkInterface_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/NetworkInterface_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/NetworkLink_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/NetworkLink_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/NetworkLink_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/NetworkLink_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/OutVcState_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/OutVcState_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/OutputUnit_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/OutputUnit_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/OutputUnit_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/OutputUnit_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/Router_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/Router_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/Router_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/Router_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/RoutingUnit_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/RoutingUnit_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/RoutingUnit_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/RoutingUnit_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/SConscript => src/mem/ruby/network/garnet/fixed-pipeline/SConscript
rename : src/mem/ruby/network/garnet-fixed-pipeline/SWallocator_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/SWallocator_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/SWallocator_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/SWallocator_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/Switch_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/Switch_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/Switch_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/Switch_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/VCallocator_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/VCallocator_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/VCallocator_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/VCallocator_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/VirtualChannel_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/VirtualChannel_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/VirtualChannel_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/VirtualChannel_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/flitBuffer_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/flitBuffer_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/flitBuffer_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/flitBuffer_d.hh
rename : src/mem/ruby/network/garnet-fixed-pipeline/flit_d.cc => src/mem/ruby/network/garnet/fixed-pipeline/flit_d.cc
rename : src/mem/ruby/network/garnet-fixed-pipeline/flit_d.hh => src/mem/ruby/network/garnet/fixed-pipeline/flit_d.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/FlexibleConsumer.hh => src/mem/ruby/network/garnet/flexible-pipeline/FlexibleConsumer.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/GarnetNetwork.cc => src/mem/ruby/network/garnet/flexible-pipeline/GarnetNetwork.cc
rename : src/mem/ruby/network/garnet-flexible-pipeline/GarnetNetwork.hh => src/mem/ruby/network/garnet/flexible-pipeline/GarnetNetwork.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/InVcState.cc => src/mem/ruby/network/garnet/flexible-pipeline/InVcState.cc
rename : src/mem/ruby/network/garnet-flexible-pipeline/InVcState.hh => src/mem/ruby/network/garnet/flexible-pipeline/InVcState.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/NetworkConfig.hh => src/mem/ruby/network/garnet/flexible-pipeline/NetworkConfig.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/NetworkInterface.cc => src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc
rename : src/mem/ruby/network/garnet-flexible-pipeline/NetworkInterface.hh => src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/NetworkLink.cc => src/mem/ruby/network/garnet/flexible-pipeline/NetworkLink.cc
rename : src/mem/ruby/network/garnet-flexible-pipeline/NetworkLink.hh => src/mem/ruby/network/garnet/flexible-pipeline/NetworkLink.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/OutVcState.cc => src/mem/ruby/network/garnet/flexible-pipeline/OutVcState.cc
rename : src/mem/ruby/network/garnet-flexible-pipeline/OutVcState.hh => src/mem/ruby/network/garnet/flexible-pipeline/OutVcState.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/Router.cc => src/mem/ruby/network/garnet/flexible-pipeline/Router.cc
rename : src/mem/ruby/network/garnet-flexible-pipeline/Router.hh => src/mem/ruby/network/garnet/flexible-pipeline/Router.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/SConscript => src/mem/ruby/network/garnet/flexible-pipeline/SConscript
rename : src/mem/ruby/network/garnet-flexible-pipeline/VCarbiter.cc => src/mem/ruby/network/garnet/flexible-pipeline/VCarbiter.cc
rename : src/mem/ruby/network/garnet-flexible-pipeline/VCarbiter.hh => src/mem/ruby/network/garnet/flexible-pipeline/VCarbiter.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/flit.cc => src/mem/ruby/network/garnet/flexible-pipeline/flit.cc
rename : src/mem/ruby/network/garnet-flexible-pipeline/flit.hh => src/mem/ruby/network/garnet/flexible-pipeline/flit.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/flitBuffer.cc => src/mem/ruby/network/garnet/flexible-pipeline/flitBuffer.cc
rename : src/mem/ruby/network/garnet-flexible-pipeline/flitBuffer.hh => src/mem/ruby/network/garnet/flexible-pipeline/flitBuffer.hh
rename : src/mem/ruby/network/garnet-flexible-pipeline/netconfig.defaults => src/mem/ruby/network/garnet/flexible-pipeline/netconfig.defaults
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