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RTSA-lab01-CacheAnalysis
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Correct MustAnalysis.

This commit is contained in:
Nils Hölscher 2022-05-06 10:04:45 +02:00
parent c451a1eed0
commit 3429652f45
6 changed files with 69 additions and 67 deletions
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2
.vscode/launch.json vendored
View File

@ -13,7 +13,7 @@
"-load-pass-plugin", "-load-pass-plugin",
"${workspaceFolder}/build/libCacheAnalysisPass.so", "${workspaceFolder}/build/libCacheAnalysisPass.so",
"-passes=lru-misses", "-passes=lru-misses",
"${workspaceFolder}/test/fft1.ll", "${workspaceFolder}/test/cnt.ll",
"-o", "-o",
"/dev/null" "/dev/null"
], ],

3
CacheAnalysisPass/CacheAnalysisPass.cpp
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@ -231,8 +231,7 @@ struct CacheAnalysisPass : PassInfoMixin<CacheAnalysisPass> {
} }
if(LoopUnrolling) if(LoopUnrolling)
AC.unrollLoops(); AC.unrollLoops();
AC.fillAbstractCache(EntryAddress); AC.runMustAnalysis(EntryAddress);
//AC.fillPath(EntryAddress);
if (DumpNodes) if (DumpNodes)
AC.dumpNodes(); AC.dumpNodes();
if (PrintEdgesPost) if (PrintEdgesPost)

22
helper.sh
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@ -111,29 +111,29 @@ case $1 in
docker run -i -d -v "$(pwd)"/.:/root:rw --name RTSAlab01 rtsalab01cacheanalysis docker run -i -d -v "$(pwd)"/.:/root:rw --name RTSAlab01 rtsalab01cacheanalysis
;; ;;
evaluation | eval) evaluation | eval)
run "fft1" run "crc"
echo "==== Correct fft1 ====" echo "==== Correct crc ===="
echo "MustHits: 21" echo "MustHits: 90"
echo echo
run "cnt" run "cnt"
echo "==== Correct cnt ====" echo "==== Correct cnt ===="
echo "MustHits: 4" echo "MustHits: 28"
echo echo
run "duff" run "duff"
echo "==== Correct duff ====" echo "==== Correct duff ===="
echo "MustHits: 3" echo "MustHits: 78"
echo
run "fft1"
echo "==== Correct fft1 ===="
echo "MustHits: 74"
echo echo
run "insertsort" run "insertsort"
echo "==== Correct insertsort ====" echo "==== Correct insertsort ===="
echo "MustHits: 2" echo "MustHits: 61"
echo echo
run "matmult" run "matmult"
echo "==== Correct matmult ====" echo "==== Correct matmult ===="
echo "MustHits: 9" echo "MustHits: 34"
echo
run "crc"
echo "==== Correct crc ===="
echo "MustHits: 6"
echo echo
;; ;;
a | all) a | all)

46
include/AbstractCache.h
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@ -329,29 +329,35 @@ public: // everything is public, because IDGAF
} }
/** /**
* @brief Idea fill the graph with the node and perform loop unrolling. * @brief Perform must analysis in the Graph
* *
* @param NodeNr * @param NodeNr
*/ */
void fillAbstractCache(unsigned int NodeNr) { void runMustAnalysis(unsigned int NodeNr) {
// if(isLoopHead(NodeNr)) // Join and call until the state converges.
Nodes[NodeNr].Computed = true;
for (unsigned int SuccNr : Nodes[NodeNr].Successors) {
Nodes[SuccNr];
// first Run
if (Nodes[SuccNr].Computed) {
// Join don't call
AbstractState Before(Nodes[SuccNr]);
Nodes[SuccNr].mustJoin(AbstractState(NodeNr, Address(NodeNr)));
// Continue Joining until State converges Nodes[NodeNr].Computed++;
if (!(Before == Nodes[SuccNr])) {
fillAbstractCache(NodeNr); // fill all Successors, if filled Already join.
} for (unsigned int SuccNr : Nodes[NodeNr].Successors) {
if (Nodes[SuccNr].Filled) {
// Join Successor with current State and its Address
Nodes[SuccNr].mustJoin(
AbstractState(Nodes[NodeNr], Address(Nodes[NodeNr].Addr)));
} else { } else {
// Update and fill Succ // Fill Successor with current State and its Address
Nodes[SuccNr].fill(Nodes[NodeNr], NodeNr); Nodes[SuccNr].fill(Nodes[NodeNr], Address(Nodes[NodeNr].Addr));
fillAbstractCache(SuccNr); // first Fill, so set Filled
Nodes[SuccNr].Filled = true;
}
// Continue Filling CFG on Successors.
for (unsigned int SuccNr : Nodes[NodeNr].Successors) {
// We can use this as we can safely assume a State has at most two successors.
// Due to branch instruction in llvmIR
if (Nodes[NodeNr].Computed > 2)
continue;
runMustAnalysis(SuccNr);
} }
} }
return; return;
@ -368,7 +374,7 @@ public: // everything is public, because IDGAF
auto Predecessor = Nodes[E.first]; auto Predecessor = Nodes[E.first];
for (unsigned int SuccessorAddr : E.second) { for (unsigned int SuccessorAddr : E.second) {
// When successors Address is in predecessor, we have a Hit. // When successors Address is in predecessor, we have a Hit.
Hits += Predecessor.isHit(Address(SuccessorAddr)) ? 1 : 0; Hits += Predecessor.isHit(Address(Nodes[SuccessorAddr].Addr)) ? 1 : 0;
} }
} }
return Hits; return Hits;
@ -385,7 +391,7 @@ public: // everything is public, because IDGAF
auto Predecessor = Nodes[E.first]; auto Predecessor = Nodes[E.first];
for (unsigned int SuccessorAddr : E.second) { for (unsigned int SuccessorAddr : E.second) {
// When successors Address is in predecessor, we have a Hit. // When successors Address is in predecessor, we have a Hit.
Misses += Predecessor.isHit(Address(SuccessorAddr)) ? 0 : 1; Misses += Predecessor.isHit(Address(Nodes[SuccessorAddr].Addr)) ? 0 : 1;
} }
} }
return Misses; return Misses;

41
include/AbstractState.h
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@ -30,7 +30,8 @@ public: // everything is public, because IDGAF
unsigned int Addr; unsigned int Addr;
unsigned int Unrolled; unsigned int Unrolled;
bool Computed = false; int Computed = 0;
bool Filled = false;
// Only entries below this comment are needed for the exercise. // Only entries below this comment are needed for the exercise.
@ -164,6 +165,11 @@ public: // everything is public, because IDGAF
* @param Addr , Address * @param Addr , Address
*/ */
void update(Address Addr) { void update(Address Addr) {
// If Updated Address is of Age 0 do nothing
if (std::find(Sets[Addr.Index].Associativity[0].Blocks.begin(),
Sets[Addr.Index].Associativity[0].Blocks.end(),
Addr.Tag) != Sets[Addr.Index].Associativity[0].Blocks.end())
return;
// This loopages all entries by one. 3 <-2, 2<-1, 1<-0 // This loopages all entries by one. 3 <-2, 2<-1, 1<-0
for (int I = 3; I > 0; I--) { for (int I = 3; I > 0; I--) {
Sets[Addr.Index].Associativity[I] = Sets[Addr.Index].Associativity[I - 1]; Sets[Addr.Index].Associativity[I] = Sets[Addr.Index].Associativity[I - 1];
@ -173,27 +179,6 @@ public: // everything is public, because IDGAF
Sets[Addr.Index].Associativity[0].Blocks = {Addr.Tag}; Sets[Addr.Index].Associativity[0].Blocks = {Addr.Tag};
} }
// /**
// * @brief Updates the AbstractState with given AbstractState
// *
// * @param UpdateState, State that gets merged into State with Age+1.
// */
// void update(AbstractState UpdateState) {
// for (auto S : UpdateState.Sets) {
// unsigned int Index = S.first;
// for (auto E : S.second.Associativity) {
// unsigned int Age = E.first;
// // If updated age is greater 4 The Tag is no longer in Cache.
// // Due to associativity of 4 per set.
// if (Age >= 4)
// break;
// for (auto B : E.second.Blocks) {
// Sets[Index].Associativity[Age].Blocks.push_back(B);
// }
// }
// }
// }
/** /**
* @brief Fills the AbstractState PreState and updates with PreAddress. * @brief Fills the AbstractState PreState and updates with PreAddress.
* *
@ -202,6 +187,7 @@ public: // everything is public, because IDGAF
* @param PreAddr Address of PreState * @param PreAddr Address of PreState
*/ */
void fill(AbstractState PreState, Address PreAddr) { void fill(AbstractState PreState, Address PreAddr) {
bool Verbose = false;
// copy Pre State into this. // copy Pre State into this.
for (auto S : PreState.Sets) { for (auto S : PreState.Sets) {
unsigned int Index = S.first; unsigned int Index = S.first;
@ -216,13 +202,24 @@ public: // everything is public, because IDGAF
} }
} }
} }
if (Verbose) {
llvm::outs() << "Before:\n";
this->dump();
}
// update this with PreAddr // update this with PreAddr
this->update(PreAddr); this->update(PreAddr);
if (Verbose) {
llvm::outs() << "Update Tag: " << PreAddr.Tag << "\n";
llvm::outs() << "Update Set: " << PreAddr.Index << "\n";
llvm::outs() << "After:\n";
this->dump();
}
} }
void dump() { void dump() {
llvm::outs() << Addr << " {\n"; llvm::outs() << Addr << " {\n";
llvm::outs() << "Unrolled: " << Unrolled << "\n"; llvm::outs() << "Unrolled: " << Unrolled << "\n";
llvm::outs() << "Computed: " << Computed << "\n";
llvm::outs() << "Predecessors: "; llvm::outs() << "Predecessors: ";
for (auto PreNr : Predecessors) { for (auto PreNr : Predecessors) {
llvm::outs() << PreNr << " "; llvm::outs() << PreNr << " ";

22
poolhelper.sh
View File

@ -145,29 +145,29 @@ case $1 in
docker run -i -d -v "$(pwd)"/.:/root:rw --name RTSAlab01 rtsalab01cacheanalysis docker run -i -d -v "$(pwd)"/.:/root:rw --name RTSAlab01 rtsalab01cacheanalysis
;; ;;
evaluation | eval) evaluation | eval)
run "fft1" run "crc"
echo "==== Correct fft1 ====" echo "==== Correct crc ===="
echo "MustHits: 21" echo "MustHits: 90"
echo echo
run "cnt" run "cnt"
echo "==== Correct cnt ====" echo "==== Correct cnt ===="
echo "MustHits: 4" echo "MustHits: 28"
echo echo
run "duff" run "duff"
echo "==== Correct duff ====" echo "==== Correct duff ===="
echo "MustHits: 3" echo "MustHits: 78"
echo
run "fft1"
echo "==== Correct fft1 ===="
echo "MustHits: 74"
echo echo
run "insertsort" run "insertsort"
echo "==== Correct insertsort ====" echo "==== Correct insertsort ===="
echo "MustHits: 2" echo "MustHits: 61"
echo echo
run "matmult" run "matmult"
echo "==== Correct matmult ====" echo "==== Correct matmult ===="
echo "MustHits: 9" echo "MustHits: 34"
echo
run "crc"
echo "==== Correct crc ===="
echo "MustHits: 6"
echo echo
;; ;;
a | all) a | all)