changeset 1eaa1fbd2212 in /z/repo/m5 details: http://repo.m5sim.org/m5?cmd=changeset;node=1eaa1fbd2212 description: garnet: use vnet_type from protocol to decide buffer depths
The virtual channels within "response" vnets are made buffers_per_data_vc deep (default=4), while virtual channels within other vnets are made buffers_per_ctrl_vc deep (default = 1). This is for accurate power estimates. diffstat: src/mem/ruby/network/garnet/NetworkHeader.hh | 2 +- src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc | 31 +++++---- src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.hh | 10 +-- src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc | 6 - src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.cc | 10 +- src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.hh | 9 -- src/mem/ruby/network/garnet/fixed-pipeline/OutputUnit_d.cc | 1 - 7 files changed, 24 insertions(+), 45 deletions(-) diffs (177 lines): diff -r de2451e66935 -r 1eaa1fbd2212 src/mem/ruby/network/garnet/NetworkHeader.hh --- a/src/mem/ruby/network/garnet/NetworkHeader.hh Sat May 21 00:00:54 2011 -0400 +++ b/src/mem/ruby/network/garnet/NetworkHeader.hh Sat May 21 00:40:57 2011 -0400 @@ -36,7 +36,7 @@ enum flit_type {HEAD_, BODY_, TAIL_, HEAD_TAIL_, NUM_FLIT_TYPE_}; enum VC_state_type {IDLE_, VC_AB_, ACTIVE_, NUM_VC_STATE_TYPE_}; -enum VNET_type {CTRL_VNET_, DATA_VNET_, NUM_VNET_TYPE_}; +enum VNET_type {CTRL_VNET_, DATA_VNET_, NULL_VNET_, NUM_VNET_TYPE_}; enum flit_stage {I_, VA_, SA_, ST_, LT_, NUM_FLIT_STAGE_}; #define INFINITE_ 10000 diff -r de2451e66935 -r 1eaa1fbd2212 src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc --- a/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc Sat May 21 00:00:54 2011 -0400 +++ b/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.cc Sat May 21 00:40:57 2011 -0400 @@ -52,6 +52,11 @@ m_buffers_per_data_vc = p->buffers_per_data_vc; m_buffers_per_ctrl_vc = p->buffers_per_ctrl_vc; + m_vnet_type.resize(m_virtual_networks); + for (int i = 0; i < m_vnet_type.size(); i++) { + m_vnet_type[i] = NULL_VNET_; // default + } + // record the routers for (vector<BasicRouter*>::const_iterator i = m_topology_ptr->params()->routers.begin(); @@ -85,12 +90,6 @@ } // false because this isn't a reconfiguration m_topology_ptr->createLinks(this, false); - - m_vnet_type.resize(m_virtual_networks); - for (int i = 0; i < m_vnet_type.size(); i++) { - m_vnet_type[i] = CTRL_VNET_; - // DATA_VNET_ updated later based on traffic - } } GarnetNetwork_d::~GarnetNetwork_d() @@ -215,7 +214,8 @@ void GarnetNetwork_d::checkNetworkAllocation(NodeID id, bool ordered, - int network_num) + int network_num, + string vnet_type) { assert(id < m_nodes); assert(network_num < m_virtual_networks); @@ -224,25 +224,26 @@ m_ordered[network_num] = true; } m_in_use[network_num] = true; + + if (vnet_type == "response") + m_vnet_type[network_num] = DATA_VNET_; // carries data (and ctrl) packets + else + m_vnet_type[network_num] = CTRL_VNET_; // carries only ctrl packets } MessageBuffer* GarnetNetwork_d::getToNetQueue(NodeID id, bool ordered, int network_num, - std::string vnet_type) + string vnet_type) { - // TODO: - //if (vnet_type == "response") - // mark vnet as data vnet and use buffers_per_data_vc - - checkNetworkAllocation(id, ordered, network_num); + checkNetworkAllocation(id, ordered, network_num, vnet_type); return m_toNetQueues[id][network_num]; } MessageBuffer* GarnetNetwork_d::getFromNetQueue(NodeID id, bool ordered, int network_num, - std::string vnet_type) + string vnet_type) { - checkNetworkAllocation(id, ordered, network_num); + checkNetworkAllocation(id, ordered, network_num, vnet_type); return m_fromNetQueues[id][network_num]; } diff -r de2451e66935 -r 1eaa1fbd2212 src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.hh --- a/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.hh Sat May 21 00:00:54 2011 -0400 +++ b/src/mem/ruby/network/garnet/fixed-pipeline/GarnetNetwork_d.hh Sat May 21 00:40:57 2011 -0400 @@ -73,13 +73,6 @@ void printConfig(std::ostream& out) const; void print(std::ostream& out) const; - void - set_vnet_type(int vc, VNET_type vnet_type) - { - int vnet = vc/getVCsPerVnet(); - m_vnet_type[vnet] = vnet_type; - } - VNET_type get_vnet_type(int vc) { @@ -124,7 +117,8 @@ bool isReconfiguration); private: - void checkNetworkAllocation(NodeID id, bool ordered, int network_num); + void checkNetworkAllocation(NodeID id, bool ordered, int network_num, + std::string vnet_type); GarnetNetwork_d(const GarnetNetwork_d& obj); GarnetNetwork_d& operator=(const GarnetNetwork_d& obj); diff -r de2451e66935 -r 1eaa1fbd2212 src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc --- a/src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc Sat May 21 00:00:54 2011 -0400 +++ b/src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc Sat May 21 00:40:57 2011 -0400 @@ -164,12 +164,6 @@ // flitisized and an output vc is acquired net_msg_ptr->getInternalDestination().removeNetDest(personal_dest); } - if (num_flits > 1) { // data packet - // defining ctrl vnet to be 1-flit packets - // and data vnet to be > 1 flit packets - m_net_ptr->set_vnet_type(vc, DATA_VNET_); - m_out_vc_state[vc]->set_credit_count(); - } for (int i = 0; i < num_flits; i++) { m_net_ptr->increment_injected_flits(); diff -r de2451e66935 -r 1eaa1fbd2212 src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.cc --- a/src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.cc Sat May 21 00:00:54 2011 -0400 +++ b/src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.cc Sat May 21 00:40:57 2011 -0400 @@ -38,10 +38,10 @@ m_vc_state = IDLE_; m_time = g_eventQueue_ptr->getTime(); - // this value is updated later for data VCs by set_credit_count() - m_credit_count = m_network_ptr->getBuffersPerCtrlVC(); + if (m_network_ptr->get_vnet_type(id) == DATA_VNET_) + m_credit_count = m_network_ptr->getBuffersPerDataVC(); + else + m_credit_count = m_network_ptr->getBuffersPerCtrlVC(); - // (num_flits > 1) is used to determine ctrl vs data vnet - // in NetworkInterface_d.cc - assert(m_credit_count == 1); + assert(m_credit_count >= 1); } diff -r de2451e66935 -r 1eaa1fbd2212 src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.hh --- a/src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.hh Sat May 21 00:00:54 2011 -0400 +++ b/src/mem/ruby/network/garnet/fixed-pipeline/OutVcState_d.hh Sat May 21 00:40:57 2011 -0400 @@ -42,15 +42,6 @@ int get_inport() { return m_in_port; } int get_invc() { return m_in_vc; } int get_credit_count() { return m_credit_count; } - void - set_credit_count() - { - // only need to initialize credit count for data VCs - // constructor sets this to BuffersPerCtrlVC by default - - if (m_network_ptr->get_vnet_type(m_id) == DATA_VNET_) - m_credit_count = m_network_ptr->getBuffersPerDataVC(); - } void set_inport(int port) { m_in_port = port; } void set_invc(int vc) { m_in_vc = vc; } diff -r de2451e66935 -r 1eaa1fbd2212 src/mem/ruby/network/garnet/fixed-pipeline/OutputUnit_d.cc --- a/src/mem/ruby/network/garnet/fixed-pipeline/OutputUnit_d.cc Sat May 21 00:00:54 2011 -0400 +++ b/src/mem/ruby/network/garnet/fixed-pipeline/OutputUnit_d.cc Sat May 21 00:40:57 2011 -0400 @@ -102,7 +102,6 @@ OutputUnit_d::update_vc(int vc, int in_port, int in_vc) { m_outvc_state[vc]->setState(ACTIVE_, g_eventQueue_ptr->getTime() + 1); - m_outvc_state[vc]->set_credit_count(); m_outvc_state[vc]->set_inport(in_port); m_outvc_state[vc]->set_invc(in_vc); m_router->update_incredit(in_port, in_vc, _______________________________________________ gem5-dev mailing list gem5-dev@m5sim.org http://m5sim.org/mailman/listinfo/gem5-dev