This patch adds a tool called DSENT to the ext/ directory. DSENT is a tool that models power and area for on-chip networks. The next patch adds a script for using the tool.
420 lines
21 KiB
C++
420 lines
21 KiB
C++
#include "model/std_cells/MUX2.h"
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#include <cmath>
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#include "model/PortInfo.h"
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#include "model/TransitionInfo.h"
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#include "model/EventInfo.h"
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#include "model/std_cells/StdCellLib.h"
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#include "model/std_cells/CellMacros.h"
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#include "model/timing_graph/ElectricalNet.h"
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#include "model/timing_graph/ElectricalDriver.h"
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#include "model/timing_graph/ElectricalLoad.h"
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#include "model/timing_graph/ElectricalDelay.h"
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namespace DSENT
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{
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using std::ceil;
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using std::max;
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MUX2::MUX2(const String& instance_name_, const TechModel* tech_model_)
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: StdCell(instance_name_, tech_model_)
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{
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initProperties();
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}
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MUX2::~MUX2()
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{}
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void MUX2::initProperties()
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{
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return;
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}
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void MUX2::constructModel()
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{
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// All constructModel should do is create Area/NDDPower/Energy Results as
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// well as instantiate any sub-instances using only the hard parameters
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createInputPort("A");
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createInputPort("B");
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createInputPort("S0");
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createOutputPort("Y");
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createLoad("A_Cap");
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createLoad("B_Cap");
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createLoad("S0_Cap");
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createDelay("A_to_Y_delay");
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createDelay("B_to_Y_delay");
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createDelay("S0_to_Y_delay");
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createDriver("Y_Ron", true);
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ElectricalLoad* a_cap = getLoad("A_Cap");
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ElectricalLoad* b_cap = getLoad("B_Cap");
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ElectricalLoad* s0_cap = getLoad("S0_Cap");
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ElectricalDelay* a_to_y_delay = getDelay("A_to_Y_delay");
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ElectricalDelay* b_to_y_delay = getDelay("B_to_Y_delay");
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ElectricalDelay* s0_to_y_delay = getDelay("S0_to_Y_delay");
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ElectricalDriver* y_ron = getDriver("Y_Ron");
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getNet("A")->addDownstreamNode(a_cap);
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getNet("B")->addDownstreamNode(b_cap);
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getNet("S0")->addDownstreamNode(s0_cap);
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a_cap->addDownstreamNode(a_to_y_delay);
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b_cap->addDownstreamNode(b_to_y_delay);
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s0_cap->addDownstreamNode(s0_to_y_delay);
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a_to_y_delay->addDownstreamNode(y_ron);
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b_to_y_delay->addDownstreamNode(y_ron);
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s0_to_y_delay->addDownstreamNode(y_ron);
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y_ron->addDownstreamNode(getNet("Y"));
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// Create Area result
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createElectricalAtomicResults();
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getEventInfo("Idle")->setStaticTransitionInfos();
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// Create MUX2 Event Energy Result
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createElectricalEventAtomicResult("MUX2");
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return;
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}
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void MUX2::updateModel()
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{
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// Get parameters
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double drive_strength = getDrivingStrength();
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Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache();
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// Standard cell cache string
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String cell_name = "MUX2_X" + (String) drive_strength;
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// Get timing parameters
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getLoad("A_Cap")->setLoadCap(cache->get(cell_name + "->Cap->A"));
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getLoad("B_Cap")->setLoadCap(cache->get(cell_name + "->Cap->B"));
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getLoad("S0_Cap")->setLoadCap(cache->get(cell_name + "->Cap->S0"));
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getDelay("A_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->A_to_Y"));
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getDelay("B_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->B_to_Y"));
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getDelay("S0_to_Y_delay")->setDelay(cache->get(cell_name + "->Delay->S0_to_Y"));
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getDriver("Y_Ron")->setOutputRes(cache->get(cell_name + "->DriveRes->Y"));
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// Set the cell area
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getAreaResult("Active")->setValue(cache->get(cell_name + "->ActiveArea"));
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getAreaResult("Metal1Wire")->setValue(cache->get(cell_name + "->ActiveArea"));
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return;
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}
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void MUX2::evaluateModel()
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{
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return;
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}
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void MUX2::useModel()
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{
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// Get parameters
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double drive_strength = getDrivingStrength();
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Map<double>* cache = getTechModel()->getStdCellLib()->getStdCellCache();
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// Standard cell cache string
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String cell_name = "MUX2_X" + (String) drive_strength;
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// Propagate the transition and get the 0->1 transition count
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propagateTransitionInfo();
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double P_A = getInputPort("A")->getTransitionInfo().getProbability1();
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double P_B = getInputPort("B")->getTransitionInfo().getProbability1();
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double P_S0 = getInputPort("S0")->getTransitionInfo().getProbability1();
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double S0_num_trans_01 = getInputPort("S0")->getTransitionInfo().getNumberTransitions01();
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double Y_num_trans_01 = getOutputPort("Y")->getTransitionInfo().getNumberTransitions01();
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// Calculate leakage
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double leakage = 0;
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leakage += cache->get(cell_name + "->Leakage->!A!B!S0") * (1 - P_A) * (1 - P_B) * (1 - P_S0);
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leakage += cache->get(cell_name + "->Leakage->!A!BS0") * (1 - P_A) * (1 - P_B) * P_S0;
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leakage += cache->get(cell_name + "->Leakage->!AB!S0") * (1 - P_A) * P_B * (1 - P_S0);
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leakage += cache->get(cell_name + "->Leakage->!ABS0") * (1 - P_A) * P_B * P_S0;
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leakage += cache->get(cell_name + "->Leakage->A!B!S0") * P_A * (1 - P_B) * (1 - P_S0);
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leakage += cache->get(cell_name + "->Leakage->A!BS0") * P_A * (1 - P_B) * P_S0;
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leakage += cache->get(cell_name + "->Leakage->AB!S0") * P_A * P_B * (1 - P_S0);
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leakage += cache->get(cell_name + "->Leakage->ABS0") * P_A * P_B * P_S0;
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getNddPowerResult("Leakage")->setValue(leakage);
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// Get VDD
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double vdd = getTechModel()->get("Vdd");
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// Get capacitances
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double s0_b_cap = cache->get(cell_name + "->Cap->S0_b");
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double y_bar_cap = cache->get(cell_name + "->Cap->Y_b");
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double y_cap = cache->get(cell_name + "->Cap->Y");
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double y_load_cap = getNet("Y")->getTotalDownstreamCap();
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// Create mux2 event energy
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double mux2_event_energy = 0.0;
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mux2_event_energy += (s0_b_cap) * S0_num_trans_01;
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mux2_event_energy += (y_bar_cap + y_cap + y_load_cap) * Y_num_trans_01;
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mux2_event_energy *= vdd * vdd;
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getEventResult("MUX2")->setValue(mux2_event_energy);
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return;
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}
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void MUX2::propagateTransitionInfo()
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{
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// Get input signal transition info
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const TransitionInfo& trans_A = getInputPort("A")->getTransitionInfo();
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const TransitionInfo& trans_B = getInputPort("B")->getTransitionInfo();
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const TransitionInfo& trans_S0 = getInputPort("S0")->getTransitionInfo();
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// Scale all transition information to the highest freq multiplier
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double max_freq_mult = max(max(trans_A.getFrequencyMultiplier(), trans_B.getFrequencyMultiplier()), trans_S0.getFrequencyMultiplier());
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const TransitionInfo& scaled_trans_A = trans_A.scaleFrequencyMultiplier(max_freq_mult);
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const TransitionInfo& scaled_trans_B = trans_B.scaleFrequencyMultiplier(max_freq_mult);
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const TransitionInfo& scaled_trans_S0 = trans_S0.scaleFrequencyMultiplier(max_freq_mult);
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// Compute the probability of each transition on a given cycle
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double A_prob_00 = scaled_trans_A.getNumberTransitions00() / max_freq_mult;
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double A_prob_01 = scaled_trans_A.getNumberTransitions01() / max_freq_mult;
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double A_prob_10 = A_prob_01;
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double A_prob_11 = scaled_trans_A.getNumberTransitions11() / max_freq_mult;
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double B_prob_00 = scaled_trans_B.getNumberTransitions00() / max_freq_mult;
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double B_prob_01 = scaled_trans_B.getNumberTransitions01() / max_freq_mult;
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double B_prob_10 = B_prob_01;
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double B_prob_11 = scaled_trans_B.getNumberTransitions11() / max_freq_mult;
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double S0_prob_00 = scaled_trans_S0.getNumberTransitions00() / max_freq_mult;
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double S0_prob_01 = scaled_trans_S0.getNumberTransitions01() / max_freq_mult;
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double S0_prob_10 = S0_prob_01;
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double S0_prob_11 = scaled_trans_S0.getNumberTransitions11() / max_freq_mult;
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// Compute output probabilities
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double Y_prob_00 = S0_prob_00 * A_prob_00 +
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S0_prob_01 * (A_prob_00 + A_prob_01) * (B_prob_00 + B_prob_10) +
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S0_prob_10 * (A_prob_00 + A_prob_10) * (B_prob_00 + B_prob_01) +
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S0_prob_11 * B_prob_00;
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double Y_prob_01 = S0_prob_00 * A_prob_01 +
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S0_prob_01 * (A_prob_00 + A_prob_01) * (B_prob_01 + B_prob_11) +
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S0_prob_10 * (A_prob_01 + A_prob_11) * (B_prob_00 + B_prob_01) +
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S0_prob_11 * B_prob_01;
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double Y_prob_11 = S0_prob_00 * A_prob_11 +
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S0_prob_01 * (A_prob_10 + A_prob_11) * (B_prob_01 + B_prob_11) +
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S0_prob_10 * (A_prob_01 + A_prob_11) * (B_prob_10 + B_prob_11) +
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S0_prob_11 * B_prob_11;
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// Check that probabilities add up to 1.0 with some finite tolerance
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ASSERT(LibUtil::Math::isEqual((Y_prob_00 + Y_prob_01 + Y_prob_01 + Y_prob_11), 1.0),
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"[Error] " + getInstanceName() + "Output transition probabilities must add up to 1 (" +
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(String) Y_prob_00 + ", " + (String) Y_prob_01 + ", " + (String) Y_prob_11 + ")!");
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// Turn probability of transitions per cycle into number of transitions per time unit
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TransitionInfo trans_Y(Y_prob_00 * max_freq_mult, Y_prob_01 * max_freq_mult, Y_prob_11 * max_freq_mult);
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getOutputPort("Y")->setTransitionInfo(trans_Y);
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return;
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}
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// Creates the standard cell, characterizes and abstracts away the details
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void MUX2::cacheStdCell(StdCellLib* cell_lib_, double drive_strength_)
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{
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// Get parameters
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double gate_pitch = cell_lib_->getTechModel()->get("Gate->PitchContacted");
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Map<double>* cache = cell_lib_->getStdCellCache();
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// Standard cell cache string
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String cell_name = "MUX2_X" + (String) drive_strength_;
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Log::printLine("=== " + cell_name + " ===");
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// Now actually build the full standard cell model
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createInputPort("A");
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createInputPort("B");
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createInputPort("S0");
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createOutputPort("Y");
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createNet("S0_b");
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createNet("Y_b");
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// Adds macros
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CellMacros::addInverter(this, "INV1", false, true, "S0", "S0_b");
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CellMacros::addInverter(this, "INV2", false, true, "Y_b", "Y");
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CellMacros::addTristate(this, "INVZ1", true, true, true, true, "A", "S0_b", "S0", "Y_b");
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CellMacros::addTristate(this, "INVZ2", true, true, true, true, "B", "S0", "S0_b", "Y_b");
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// I have no idea how to size each of the parts haha
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CellMacros::updateInverter(this, "INV1", drive_strength_ * 0.250);
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CellMacros::updateInverter(this, "INV2", drive_strength_ * 1.000);
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CellMacros::updateTristate(this, "INVZ1", drive_strength_ * 0.500);
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CellMacros::updateTristate(this, "INVZ2", drive_strength_ * 0.500);
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// Cache area result
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double area = 0.0;
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area += gate_pitch * getTotalHeight() * 1;
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area += gate_pitch * getTotalHeight() * getGenProperties()->get("INV1_GatePitches").toDouble();
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area += gate_pitch * getTotalHeight() * getGenProperties()->get("INV2_GatePitches").toDouble();
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area += gate_pitch * getTotalHeight() * getGenProperties()->get("INVZ1_GatePitches").toDouble();
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area += gate_pitch * getTotalHeight() * getGenProperties()->get("INVZ2_GatePitches").toDouble();
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cache->set(cell_name + "->ActiveArea", area);
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Log::printLine(cell_name + "->ActiveArea=" + (String) area);
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// --------------------------------------------------------------------
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// Cache Leakage Power (for every single signal combination)
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// --------------------------------------------------------------------
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double leakage_000 = 0; //!A, !B, !S0
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double leakage_001 = 0; //!A, !B, S0
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double leakage_010 = 0; //!A, B, !S0
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double leakage_011 = 0; //!A, B, S0
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double leakage_100 = 0; //A, !B, !S0
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double leakage_101 = 0; //A, !B, S0
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double leakage_110 = 0; //A, B, !S0
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double leakage_111 = 0; //A, B, S0
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//This is so painful...
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leakage_000 += getGenProperties()->get("INV1_LeakagePower_0").toDouble();
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leakage_000 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
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leakage_000 += getGenProperties()->get("INVZ1_LeakagePower_100_1").toDouble();
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leakage_000 += getGenProperties()->get("INVZ2_LeakagePower_010_1").toDouble();
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leakage_001 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
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leakage_001 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
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leakage_001 += getGenProperties()->get("INVZ1_LeakagePower_010_1").toDouble();
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leakage_001 += getGenProperties()->get("INVZ2_LeakagePower_100_1").toDouble();
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leakage_010 += getGenProperties()->get("INV1_LeakagePower_0").toDouble();
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leakage_010 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
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leakage_010 += getGenProperties()->get("INVZ1_LeakagePower_100_1").toDouble();
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leakage_010 += getGenProperties()->get("INVZ2_LeakagePower_011_1").toDouble();
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leakage_011 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
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leakage_011 += getGenProperties()->get("INV2_LeakagePower_0").toDouble();
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leakage_011 += getGenProperties()->get("INVZ1_LeakagePower_010_0").toDouble();
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leakage_011 += getGenProperties()->get("INVZ2_LeakagePower_101_0").toDouble();
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leakage_100 += getGenProperties()->get("INV1_LeakagePower_0").toDouble();
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leakage_100 += getGenProperties()->get("INV2_LeakagePower_0").toDouble();
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leakage_100 += getGenProperties()->get("INVZ1_LeakagePower_101_0").toDouble();
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leakage_100 += getGenProperties()->get("INVZ2_LeakagePower_010_0").toDouble();
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leakage_101 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
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leakage_101 += getGenProperties()->get("INV2_LeakagePower_0").toDouble();
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leakage_101 += getGenProperties()->get("INVZ1_LeakagePower_011_1").toDouble();
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leakage_101 += getGenProperties()->get("INVZ2_LeakagePower_100_1").toDouble();
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leakage_110 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
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leakage_110 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
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leakage_110 += getGenProperties()->get("INVZ1_LeakagePower_101_0").toDouble();
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leakage_110 += getGenProperties()->get("INVZ2_LeakagePower_011_0").toDouble();
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leakage_111 += getGenProperties()->get("INV1_LeakagePower_1").toDouble();
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leakage_111 += getGenProperties()->get("INV2_LeakagePower_1").toDouble();
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leakage_111 += getGenProperties()->get("INVZ1_LeakagePower_011_0").toDouble();
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leakage_111 += getGenProperties()->get("INVZ2_LeakagePower_101_0").toDouble();
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cache->set(cell_name + "->Leakage->!A!B!S0", leakage_000);
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cache->set(cell_name + "->Leakage->!A!BS0", leakage_001);
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cache->set(cell_name + "->Leakage->!AB!S0", leakage_010);
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cache->set(cell_name + "->Leakage->!ABS0", leakage_011);
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cache->set(cell_name + "->Leakage->A!B!S0", leakage_100);
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cache->set(cell_name + "->Leakage->A!BS0", leakage_101);
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cache->set(cell_name + "->Leakage->AB!S0", leakage_110);
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cache->set(cell_name + "->Leakage->ABS0", leakage_111);
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Log::printLine(cell_name + "->Leakage->!A!B!S0=" + (String) leakage_000);
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Log::printLine(cell_name + "->Leakage->!A!BS0=" + (String) leakage_001);
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Log::printLine(cell_name + "->Leakage->!AB!S0=" + (String) leakage_010);
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Log::printLine(cell_name + "->Leakage->!ABS0=" + (String) leakage_011);
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Log::printLine(cell_name + "->Leakage->A!B!S0=" + (String) leakage_100);
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Log::printLine(cell_name + "->Leakage->A!BS0=" + (String) leakage_101);
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Log::printLine(cell_name + "->Leakage->AB!S0=" + (String) leakage_110);
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Log::printLine(cell_name + "->Leakage->ABS0=" + (String) leakage_111);
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// Cache event energy results
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/*
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double event_a_flip = 0.0;
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event_a_flip += getGenProperties()->get("INVZ1_A_Flip").toDouble();
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cache->set(cell_name + "->Event_A_Flip", event_a_flip);
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Log::printLine(cell_name + "->Event_A_Flip=" + (String) event_a_flip);
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double event_b_flip = 0.0;
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event_b_flip += getGenProperties()->get("INVZ1_A_Flip").toDouble();
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cache->set(cell_name + "->Event_B_Flip", event_b_flip);
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Log::printLine(cell_name + "->Event_B_Flip=" + (String) event_b_flip);
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double event_s0_flip = 0.0;
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event_s0_flip += getGenProperties()->get("INV1_A_Flip").toDouble();
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event_s0_flip += getGenProperties()->get("INV1_ZN_Flip").toDouble();
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event_s0_flip += getGenProperties()->get("INVZ1_OE_Flip").toDouble() + getGenProperties()->get("INVZ1_OEN_Flip").toDouble();
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event_s0_flip += getGenProperties()->get("INVZ2_OE_Flip").toDouble() + getGenProperties()->get("INVZ2_OEN_Flip").toDouble();
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cache->set(cell_name + "->Event_S0_Flip", event_s0_flip);
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Log::printLine(cell_name + "->Event_S0_Flip=" + (String) event_s0_flip);
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double event_y_flip = 0.0;
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event_y_flip += getGenProperties()->get("INVZ1_ZN_Flip").toDouble();
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event_y_flip += getGenProperties()->get("INVZ2_ZN_Flip").toDouble();
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event_y_flip += getGenProperties()->get("INV2_A_Flip").toDouble();
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event_y_flip += getGenProperties()->get("INV2_ZN_Flip").toDouble();
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cache->set(cell_name + "->Event_Y_Flip", event_y_flip);
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Log::printLine(cell_name + "->Event_Y_Flip=" + (String) event_y_flip);
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double a_cap = getLoad("INVZ1_CgA")->getLoadCap();
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double b_cap = getLoad("INVZ2_CgA")->getLoadCap();
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double s0_cap = getLoad("INV1_CgA")->getLoadCap() + getLoad("INVZ1_CgOEN")->getLoadCap() + getLoad("INVZ2_CgOE")->getLoadCap();
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double y_ron = getDriver("INV2_RonZN")->getOutputRes();
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*/
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// --------------------------------------------------------------------
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// --------------------------------------------------------------------
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// Get Node capacitances
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// --------------------------------------------------------------------
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double a_cap = getNet("A")->getTotalDownstreamCap();
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double b_cap = getNet("B")->getTotalDownstreamCap();
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double s0_cap = getNet("S0")->getTotalDownstreamCap();
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double s0_b_cap = getNet("S0_b")->getTotalDownstreamCap();
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double y_b_cap = getNet("Y_b")->getTotalDownstreamCap();
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double y_cap = getNet("Y")->getTotalDownstreamCap();
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cache->set(cell_name + "->Cap->A", a_cap);
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cache->set(cell_name + "->Cap->B", b_cap);
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cache->set(cell_name + "->Cap->S0", s0_cap);
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cache->set(cell_name + "->Cap->S0_b", s0_b_cap);
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cache->set(cell_name + "->Cap->Y_b", y_b_cap);
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cache->set(cell_name + "->Cap->Y", y_cap);
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Log::printLine(cell_name + "->Cap->A=" + (String) a_cap);
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Log::printLine(cell_name + "->Cap->B=" + (String) b_cap);
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Log::printLine(cell_name + "->Cap->S0=" + (String) s0_cap);
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Log::printLine(cell_name + "->Cap->S0_b=" + (String) s0_b_cap);
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Log::printLine(cell_name + "->Cap->Y_b=" + (String) y_b_cap);
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Log::printLine(cell_name + "->Cap->Y=" + (String) y_cap);
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// --------------------------------------------------------------------
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// --------------------------------------------------------------------
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// Build Internal Delay Model
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// --------------------------------------------------------------------
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// Build abstracted timing model
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double y_ron = getDriver("INV2_RonZN")->getOutputRes();
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double a_to_y_delay = 0.0;
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a_to_y_delay += getDriver("INVZ1_RonZN")->calculateDelay();
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a_to_y_delay += getDriver("INV2_RonZN")->calculateDelay();
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double b_to_y_delay = 0.0;
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b_to_y_delay += getDriver("INVZ1_RonZN")->calculateDelay();
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b_to_y_delay += getDriver("INV2_RonZN")->calculateDelay();
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|
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double s0_to_y_delay = 0.0;
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s0_to_y_delay += getDriver("INV1_RonZN")->calculateDelay();
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s0_to_y_delay += max(getDriver("INVZ1_RonZN")->calculateDelay(), getDriver("INVZ1_RonZN")->calculateDelay());
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s0_to_y_delay += getDriver("INV2_RonZN")->calculateDelay();
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cache->set(cell_name + "->DriveRes->Y", y_ron);
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cache->set(cell_name + "->Delay->A_to_Y", a_to_y_delay);
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cache->set(cell_name + "->Delay->B_to_Y", b_to_y_delay);
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cache->set(cell_name + "->Delay->S0_to_Y", s0_to_y_delay);
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Log::printLine(cell_name + "->DriveRes->Y=" + (String) y_ron);
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Log::printLine(cell_name + "->Delay->A_to_Y=" + (String) a_to_y_delay);
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Log::printLine(cell_name + "->Delay->B_to_Y=" + (String) b_to_y_delay);
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Log::printLine(cell_name + "->Delay->S0_to_Y=" + (String) s0_to_y_delay);
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// --------------------------------------------------------------------
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|
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return;
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}
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} // namespace DSENT
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