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author | Nilay Vaish <nilay@cs.wisc.edu> | 2014-10-11 15:02:23 -0500 |
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committer | Nilay Vaish <nilay@cs.wisc.edu> | 2014-10-11 15:02:23 -0500 |
commit | 9321a41c62c25643d7b6381abbcf5694a012e056 (patch) | |
tree | b1de81385d622c0f820e12e25062f94dd146ae4e /src/mem/ruby/network/orion/Allocator/MatrixArbiter.cc | |
parent | b6d804a1e6281f9916de216cdb8b9c64859dd348 (diff) | |
download | gem5-9321a41c62c25643d7b6381abbcf5694a012e056.tar.xz |
ruby: drop Orion network power model
Orion is being dropped from ruby. It would be replaced with DSENT
which has better models. Note that the power / energy numbers reported
after this patch has been applied are not for use.
Diffstat (limited to 'src/mem/ruby/network/orion/Allocator/MatrixArbiter.cc')
-rw-r--r-- | src/mem/ruby/network/orion/Allocator/MatrixArbiter.cc | 251 |
1 files changed, 0 insertions, 251 deletions
diff --git a/src/mem/ruby/network/orion/Allocator/MatrixArbiter.cc b/src/mem/ruby/network/orion/Allocator/MatrixArbiter.cc deleted file mode 100644 index 2f7ffcb48..000000000 --- a/src/mem/ruby/network/orion/Allocator/MatrixArbiter.cc +++ /dev/null @@ -1,251 +0,0 @@ -/* - * Copyright (c) 2009 Princeton University - * Copyright (c) 2009 The Regents of the University of California - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer; - * redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution; - * neither the name of the copyright holders nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT - * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE - * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - * - * Authors: Hangsheng Wang (Orion 1.0, Princeton) - * Xinping Zhu (Orion 1.0, Princeton) - * Xuning Chen (Orion 1.0, Princeton) - * Bin Li (Orion 2.0, Princeton) - * Kambiz Samadi (Orion 2.0, UC San Diego) - */ - -#include <cassert> -#include <cmath> -#include <iostream> - -#include "mem/ruby/network/orion/Allocator/MatrixArbiter.hh" -#include "mem/ruby/network/orion/FlipFlop.hh" -#include "mem/ruby/network/orion/TechParameter.hh" - -using namespace std; - -MatrixArbiter::MatrixArbiter(const string& ff_model_str_, - uint32_t req_width_, - double len_in_wire_, - const TechParameter* tech_param_ptr_) - : Arbiter(RR_ARBITER, req_width_, len_in_wire_, tech_param_ptr_) -{ - init(ff_model_str_); -} - -MatrixArbiter::~MatrixArbiter() -{ - delete m_ff_ptr; -} - -double -MatrixArbiter::calc_dynamic_energy(double num_req_, bool is_max_) const -{ - assert(num_req_ < m_req_width); - - double num_grant; - if (num_req_ >= 1) num_grant = 1; - else if (num_req_) num_grant = 1.0 / ceil(1.0 / num_req_); - else num_grant = 0; - - uint32_t total_pri = m_req_width * (m_req_width - 1) / 2; - double num_chg_pri = (m_req_width - 1) * (is_max_? 1 : 0.5); - - double e_atomic; - double e_arb = 0; - - //FIXME: we may overestimate request switch - e_atomic = m_e_chg_req * num_req_; - e_arb += e_atomic; - - e_atomic = m_e_chg_grant * num_grant; - e_arb += e_atomic; - - // priority register - e_atomic = m_ff_ptr->get_e_switch() * num_chg_pri * num_grant; - e_arb += e_atomic; - - // assume 1 and 0 are uniformly distributed - if ((m_ff_ptr->get_e_keep_0() >= m_ff_ptr->get_e_keep_1()) || (!is_max_)) - { - e_atomic = m_ff_ptr->get_e_keep_0(); - e_atomic *= (total_pri - num_chg_pri * num_grant) * (is_max_? 1 : 0.5); - e_arb += e_atomic; - } - if ((m_ff_ptr->get_e_keep_0() < m_ff_ptr->get_e_keep_1()) || (!is_max_)) - { - e_atomic = m_ff_ptr->get_e_keep_1(); - e_atomic *= (total_pri - num_chg_pri * num_grant) * (is_max_? 1 : 0.5); - e_arb += e_atomic; - } - - e_atomic = m_ff_ptr->get_e_clock()*total_pri; - e_arb += e_atomic; - - // based on above assumptions - if (is_max_) - { - e_atomic = m_e_chg_int; - e_atomic *= (min(num_req_, m_req_width * 0.5) + 2) * (m_req_width - 1); - } - else - { - e_atomic = m_e_chg_int * (num_req_ + 1) * (m_req_width - 1) * 0.5; - } - e_arb += e_atomic; - - return e_arb; -} - -void MatrixArbiter::init(const string& ff_model_str_) -{ - double e_factor = m_tech_param_ptr->get_EnergyFactor(); - - m_e_chg_req = calc_req_cap() / 2 * e_factor; - // two grant signals switch together, so no 1/2 - m_e_chg_grant = calc_grant_cap() * e_factor; - m_e_chg_int = calc_int_cap() / 2 * e_factor; - - double ff_load = calc_pri_cap(); - m_ff_ptr = new FlipFlop(ff_model_str_, ff_load, m_tech_param_ptr); - - m_i_static = calc_i_static(); - return; -} - -// the "huge" NOR gate in matrix arbiter model is an approximation -// switch cap of request signal -double MatrixArbiter::calc_req_cap() -{ - double total_cap = 0; - - // part 1: gate cap of NOR gates - // FIXME: need actual size - double WdecNORn = m_tech_param_ptr->get_WdecNORn(); - double WdecNORp = m_tech_param_ptr->get_WdecNORp(); - double gatecap = m_tech_param_ptr->calc_gatecap(WdecNORn+WdecNORp, 0); - total_cap += (m_req_width - 1) * gatecap; - - // part 2: inverter - // FIXME: need actual size - double Wdecinvn = m_tech_param_ptr->get_Wdecinvn(); - double Wdecinvp = m_tech_param_ptr->get_Wdecinvp(); - total_cap += m_tech_param_ptr->calc_draincap(Wdecinvn, - TechParameter::NCH, 1) - + m_tech_param_ptr->calc_draincap(Wdecinvp, TechParameter::PCH, 1) - + m_tech_param_ptr->calc_gatecap(Wdecinvn+Wdecinvp, 0); - - // part 3: gate cap of the "huge" NOR gate - // FIXME: need actual size - total_cap += m_tech_param_ptr->calc_gatecap(WdecNORn + WdecNORp, 0); - - // part 4: wire cap - double Cmetal = m_tech_param_ptr->get_Cmetal(); - total_cap += m_len_in_wire * Cmetal; - - return total_cap; -} - -// switch cap of priority signal -double MatrixArbiter::calc_pri_cap() -{ - double total_cap = 0; - - // part 1: gate cap of NOR gate - // FIXME: need actual size - double WdecNORn = m_tech_param_ptr->get_WdecNORn(); - double WdecNORp = m_tech_param_ptr->get_WdecNORp(); - total_cap += 2 * m_tech_param_ptr->calc_gatecap(WdecNORn+WdecNORp, 0); - - return total_cap; -} - -// switch cap of grant signa -double MatrixArbiter::calc_grant_cap() -{ - double total_cap = 0; - - // part 1: drain cap of NOR gate - // FIXME: need actual size - double WdecNORn = m_tech_param_ptr->get_WdecNORn(); - double WdecNORp = m_tech_param_ptr->get_WdecNORp(); - double draincap1 = m_tech_param_ptr->calc_draincap(WdecNORn, - TechParameter::NCH, 1); - - double draincap2 = m_tech_param_ptr->calc_draincap(WdecNORp, - TechParameter::PCH, - m_req_width); - - total_cap += m_req_width * (draincap1 + draincap2); - - return total_cap; -} - -// switch cap of internal node -double MatrixArbiter::calc_int_cap() -{ - double total_cap = 0; - - double WdecNORn = m_tech_param_ptr->get_WdecNORn(); - double WdecNORp = m_tech_param_ptr->get_WdecNORp(); - // part 1: drain cap of NOR gate (this bloc) - // FIXME: need actual size - total_cap += 2 * m_tech_param_ptr->calc_draincap(WdecNORn, - TechParameter::NCH, 1) - + m_tech_param_ptr->calc_draincap(WdecNORp, TechParameter::PCH, 2); - - // part 2: gate cap of NOR gate (next block) - // FIXME: need actual size - total_cap += m_tech_param_ptr->calc_gatecap(WdecNORn + WdecNORp, 0); - - return total_cap; -} - -double MatrixArbiter::calc_i_static() -{ - double i_static = 0; - - double WdecNORn = m_tech_param_ptr->get_WdecNORn(); - double WdecNORp = m_tech_param_ptr->get_WdecNORp(); - double Wdecinvn = m_tech_param_ptr->get_Wdecinvn(); - double Wdecinvp = m_tech_param_ptr->get_Wdecinvp(); - double Wdff = m_tech_param_ptr->get_Wdff(); - double NOR2_TAB_0 = m_tech_param_ptr->get_NOR2_TAB(0); - double NOR2_TAB_1 = m_tech_param_ptr->get_NOR2_TAB(1); - double NOR2_TAB_2 = m_tech_param_ptr->get_NOR2_TAB(2); - double NOR2_TAB_3 = m_tech_param_ptr->get_NOR2_TAB(3); - double NMOS_TAB_0 = m_tech_param_ptr->get_NMOS_TAB(0); - double PMOS_TAB_0 = m_tech_param_ptr->get_PMOS_TAB(0); - double DFF_TAB_0 = m_tech_param_ptr->get_DFF_TAB(0); - - // NOR - i_static += ((2 * m_req_width - 1) * m_req_width * - ((WdecNORp * NOR2_TAB_0 + WdecNORn * - (NOR2_TAB_1 + NOR2_TAB_2 + NOR2_TAB_3)) / 4)); - // inverter - i_static += m_req_width * - ((Wdecinvn * NMOS_TAB_0 + Wdecinvp * PMOS_TAB_0) / 2); - // dff - i_static += (m_req_width * (m_req_width - 1) / 2) * Wdff * DFF_TAB_0; - - return i_static; -} |