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Computation of the relative area used by the registers in Etesian. 

* Change: In EtesianEngine::toColoquinte(), not only compute the ratio
    of DFF versus the total number of gates, but also the ratio in
    term of area. As the DFF are usually very big cells compare to
    combinatorial one, the direct gate ratio could be misleading as
    to the "weight" of those cell in the design.
This commit is contained in:
Jean-Paul Chaput 2022-06-05 20:36:41 +02:00
parent 33a5cd3b0b
commit 9d818df5b1
1 changed files with 20 additions and 6 deletions
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26
etesian/src/EtesianEngine.cpp
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@ -733,8 +733,9 @@ namespace Etesian {
}
cmess2 << " - Whole place area: " << getBlockCell()->getAbutmentBox() << "." << endl;
cmess2 << " - Sub-place Area: " << _placeArea << "." << endl;
DbU::Unit totalLength = (_placeArea.getHeight()/sliceHeight) * _placeArea.getWidth();
DbU::Unit usedLength = 0;
DbU::Unit totalLength = (_placeArea.getHeight()/sliceHeight) * _placeArea.getWidth();
DbU::Unit usedLength = 0;
DbU::Unit registerLength = 0;
Dots dots ( cmess2, " ", 80, 1000 );
if (not cmess2.enabled()) dots.disable();
@ -750,8 +751,11 @@ namespace Etesian {
for ( Instance* instance : getCell()->getInstances() ) {
if (instance == getBlockInstance()) continue;
string masterName = getString( instance->getMasterCell()->getName() );
if (masterName.substr(0,3) == "sff") ++registerNb;
Box instanceAb = instance->getAbutmentBox();
Box instanceAb = instance->getAbutmentBox();
if (masterName.substr(0,3) == "sff") {
++registerNb;
registerLength += instanceAb.getWidth();
}
if (instance->getPlacementStatus() == Instance::PlacementStatus::FIXED) {
if (topAb.intersect(instanceAb)) {
++instancesNb;
@ -759,6 +763,9 @@ namespace Etesian {
totalLength -= (instanceAb.getHeight()/sliceHeight) * instanceAb.getWidth();
}
}
if (instance->getPlacementStatus() == Instance::PlacementStatus::PLACED) {
cerr << "PLACED " << instance << endl;
}
}
}
@ -767,10 +774,15 @@ namespace Etesian {
Instance* instance = static_cast<Instance*>(occurrence.getEntity());
Box instanceAb = instance->getAbutmentBox();
string masterName = getString( instance->getMasterCell()->getName() );
if (masterName.substr(0,3) == "sff") ++registerNb;
if (masterName.substr(0,3) == "sff") {
++registerNb;
registerLength += instanceAb.getWidth();
}
if (instance->getPlacementStatus() == Instance::PlacementStatus::FIXED) {
++fixedNb;
totalLength -= (instanceAb.getHeight()/sliceHeight) * instanceAb.getWidth();
} else if (instance->getPlacementStatus() == Instance::PlacementStatus::PLACED) {
cerr << "PLACED " << instance << endl;
} else {
usedLength += (instanceAb.getHeight()/sliceHeight) * instanceAb.getWidth();
//cerr << DbU::getValueString(usedLength) << " " << instance << endl;
@ -799,7 +811,9 @@ namespace Etesian {
float ratio = ((float)registerNb / (float)instancesNb) * 100.0;
ostringstream os1;
os1 << registerNb << " (" << fixed << setprecision(2) << ratio << "%)";
cmess1 << ::Dots::asString( " - Registers (DFF) ", os1.str() ) << endl;
cmess1 << ::Dots::asString ( " - Registers (DFF) ", os1.str() ) << endl;
cmess1 << ::Dots::asPercentage( " - Registers (DFF) area "
, (float)(registerLength)/(float)totalLength ) << endl;
ratio = ((float)_bufferCount / (float)instancesNb) * 100.0;
ostringstream os2;
os2 << _bufferCount << " (" << fixed << setprecision(2) << ratio << "%)";