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RTSA-lab01-CacheAnalysis
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Merge commit '2ab71cf95df2fa3615909d24187b38715c20181d'

This commit is contained in:
Mukendi Mputu 2022-05-24 21:56:35 +02:00
parent 42b533434b 2ab71cf95d
commit 2f682920f7
10 changed files with 348 additions and 75 deletions
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11
.drone.yml Normal file
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@ -0,0 +1,11 @@
kind: pipeline
type: docker
name: llvmta-build
steps:
- name: Build
image: ls12-nvm-oma1:5000/cppdev
commands:
- mkdir build
- cd build
- cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -DLT_LLVM_INSTALL_DIR=/usr ..
- ninja -j 2

30
.vscode/launch.json vendored
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@ -4,21 +4,21 @@
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"type": "lldb",
"request": "launch",
"name": "LLDB Unrolling",
"program": "/usr/bin/opt",
"args": [
"-load-pass-plugin",
"${workspaceFolder}/build/libCacheAnalysisPass.so",
"-passes=lru-misses",
"${workspaceFolder}/test/cnt.ll",
"-o",
"/dev/null"
],
"cwd": "${workspaceFolder}"
},
// {
// "type": "lldb",
// "request": "launch",
// "name": "LLDB Unrolling",
// "program": "/usr/bin/opt",
// "args": [
// "-load-pass-plugin",
// "${workspaceFolder}/build/libCacheAnalysisPass.so",
// "-passes=lru-misses",
// "${workspaceFolder}/test/cnt.ll",
// "-o",
// "/dev/null"
// ],
// "cwd": "${workspaceFolder}"
// },
{
"type": "lldb",
"request": "launch",

14
CMakeLists.txt
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@ -1,6 +1,19 @@
cmake_minimum_required(VERSION 3.13.4)
project(RTSA-lab01-CacheAnalysis)
#===============================================================================
# 0. Add GoogleTest
#===============================================================================
include(FetchContent)
FetchContent_Declare(
googletest
URL
URL https://github.com/google/googletest/archive/refs/heads/main.zip
)
# For Windows: Prevent overriding the parent project's compiler/linker settings
set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
FetchContent_MakeAvailable(googletest)
#===============================================================================
# 1. VERIFY LLVM INSTALLATION DIR
# This is just a bit of a sanity checking.
@ -108,4 +121,5 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${PROJECT_BINARY_DIR}/lib")
# available for the sub-projects.
#===============================================================================
add_subdirectory(CacheAnalysisPass) # Use your pass name here.
add_subdirectory(UnitTest)
#add_subdirectory(lib)

8
CacheAnalysisPass/CacheAnalysisPass.cpp
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@ -215,15 +215,15 @@ struct CacheAnalysisPass : PassInfoMixin<CacheAnalysisPass> {
}
PreservedAnalyses run(Module &M, ModuleAnalysisManager &MAM) {
FunctionAnalysisManager &FAM =
MAM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
// FunctionAnalysisManager &FAM =
// MAM.getResult<FunctionAnalysisManagerModuleProxy>(M).getManager();
addressCollector(M);
Function *EntryFunction;
// Function *EntryFunction;
for (Function &F : M.getFunctionList()) {
// Start iterating through CFG from entry point
if (F.getName().equals(EntryPoint)) {
EntryFunction = &F;
// EntryFunction = &F;
initEdges(F);
}
if (PrintAddresses)

19
README.md
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@ -1,10 +1,18 @@
# RTSA-lab01-CacheAnalysis
[![Build Status](http://129.217.34.203/api/badges/nils.hoelscher/RTSA-lab01-CacheAnalysis/status.svg)](http://129.217.34.203/nils.hoelscher/RTSA-lab01-CacheAnalysis)
In this lab session you will learn how to implement a LRU cache in abstract representation.
The Goal is to implement an LRU must Join in include/AbstractState.h.
For this we assume a "Set-Associative LRU Cache", with 16 sets an associativity of 4 and a cacheline size of two times instruction size.
## Exercise
Implement a LRU Must-Join as described in the lecture, WCET - Cache Analysis.
A 16 SetCache with an associativity of 4 Assumed, and cache lines can hold two memory words -> CacheSize 1024kB.
In order to do so, complete the function "mustJoin" inside [include/AbstractState.h:138](https://git.cs.tu-dortmund.de/nils.hoelscher/RTSA-lab01-CacheAnalysis/src/branch/master/include/AbstractState.h#L138).
The goal is to join the inbound state into the "this" state.
The Project can be build, tested and Evaluated with the "helper" script.
The Setup and some nice to knows are described in the following sections.
## Disclaimer
@ -82,6 +90,7 @@ This is my personally preferred IDE setup for C/C++ and by no means needed to ac
clangd,
Clang-Format,
CodeLLDB,
C++ TestMate,
Docker and
Remote Development
@ -145,6 +154,12 @@ You can also set the following variables in the CacheAnalysisPass/CacheAnalysisP
Helpful to understand what the program does but not very so much for the actual exercise.
## UnitTest
The best way to see what your function does is to use the [UnitTest.cpp](https://git.cs.tu-dortmund.de/nils.hoelscher/RTSA-lab01-CacheAnalysis/src/branch/master/UnitTest/UnitTest.cpp).
With "C++ TestMate" install you can simply run or debug the test from the side panel in VS Code (Flask Icon).
The "C++ TestMate" is not installed in the VM as I just added this feature now.
Please feel free to add more test cases to your liking in [UnitTest.cpp](https://git.cs.tu-dortmund.de/nils.hoelscher/RTSA-lab01-CacheAnalysis/src/branch/master/UnitTest/UnitTest.cpp).
## Use the Helper script
Again if you work on a Pool PC use poolhelper.sh insted of the helper.sh script.

52
UnitTest/CMakeLists.txt Normal file
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@ -0,0 +1,52 @@
cmake_minimum_required(VERSION 3.13.4)
project(UnitTest)
#===============================================================================
# 1. LOAD LLVM CONFIGURATION
#===============================================================================
# Set this to a valid LLVM installation dir
set(LT_LLVM_INSTALL_DIR "" CACHE PATH "LLVM installation directory")
# Add the location of LLVMConfig.cmake to CMake search paths (so that
# find_package can locate it)
list(APPEND CMAKE_PREFIX_PATH "${LT_LLVM_INSTALL_DIR}/lib/cmake/llvm/")
# FIXME: This is a warkaround for #25. Remove once resolved and use
# find_package(LLVM 11.0.0 REQUIRED CONFIG) instead.
find_package(LLVM REQUIRED CONFIG)
# UnitTest includes headers from LLVM - update the include paths accordingly
include_directories(SYSTEM ${LLVM_INCLUDE_DIRS}, "${CMAKE_CURRENT_SOURCE_DIR}/../include")
#===============================================================================
# 2. LLVM-TUTOR BUILD CONFIGURATION
#===============================================================================
# Use the same C++ standard as LLVM does
set(CMAKE_CXX_STANDARD 14 CACHE STRING "")
# LLVM is normally built without RTTI. Be consistent with that.
if(NOT LLVM_ENABLE_RTTI)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fno-rtti")
endif()
#===============================================================================
# 3. ADD THE TARGET
#===============================================================================
enable_testing()
add_executable(UnitTest
# List your source files here.
UnitTest.cpp
)
# Allow undefined symbols in shared objects on Darwin (this is the default
# behaviour on Linux)
target_link_libraries(UnitTest
"$<$<PLATFORM_ID:Darwin>:-undefined dynamic_lookup>")
target_link_libraries(
UnitTest
gtest_main
)
include(GoogleTest)
gtest_discover_tests(UnitTest)

174
UnitTest/UnitTest.cpp Normal file
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@ -0,0 +1,174 @@
#include <gtest/gtest.h>
#include <sys/stat.h>
#include "../include/AbstractCache.h"
void fillSet(AbstractState &In, unsigned int Set) {
for (int I = 0; I < 4; I++) {
In.Sets[Set].Associativity[I].Blocks.push_front(I);
}
}
// Joined Set should remain the same
TEST(MustJoinTests, MustJoinSameStates) {
AbstractCache AC;
AC.addEmptyNode(0);
fillSet(AC.Nodes[0], 0);
AC.addEmptyNode(1);
fillSet(AC.Nodes[1], 0);
AC.Nodes[0].mustJoin(AC.Nodes[1]);
for (auto B : AC.Nodes[0].Sets[0].Associativity) {
uint Age = B.first;
EXPECT_EQ(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.front(),
AC.Nodes[1].Sets[0].Associativity[Age].Blocks.front());
}
}
void counterFillSet(AbstractState &In, unsigned int Set) {
for (int I = 0; I < 4; I++) {
In.Sets[Set].Associativity[I].Blocks.push_front((I + 1) % 4);
}
}
// Resulting state should be
// Set[0]:
// Age[0]:
// Age[1]: 1
// Age[2]: 2
// Age[3]: 0 3
TEST(MustJoinTests, MustJoinDifferentStates) {
AbstractCache AC;
AC.addEmptyNode(0);
counterFillSet(AC.Nodes[0], 0);
AC.addEmptyNode(1);
fillSet(AC.Nodes[1], 0);
std::cout << "==Before:==\n";
AC.Nodes[0].dumpSet(0);
AC.Nodes[1].dumpSet(0);
AC.Nodes[0].mustJoin(AC.Nodes[1]);
std::cout << "\n==After:==\n";
AC.Nodes[0].dumpSet(0);
for (auto B : AC.Nodes[0].Sets[0].Associativity) {
uint Age = B.first;
switch (Age) {
case 0:
EXPECT_TRUE(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.empty());
break;
case 1:
EXPECT_EQ(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.front(), 1);
break;
case 2:
EXPECT_EQ(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.front(), 2);
break;
case 3:
// this test is not very exact the Set 0 with age 3 should contain (0,3)
// in arbitrary order
EXPECT_EQ(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.size(), 2);
break;
default:
// should never be reached!
EXPECT_TRUE(false);
}
}
}
void fillSetHighNumbers(AbstractState &In, unsigned int Set) {
for (int I = 0; I < 4; I++) {
In.Sets[Set].Associativity[I].Blocks.push_front(10 + I);
}
}
// resulting state should be empty
TEST(MustJoinTests, MustJoinDisjunctStates) {
AbstractCache AC;
AC.addEmptyNode(0);
fillSetHighNumbers(AC.Nodes[0], 0);
AC.addEmptyNode(1);
fillSet(AC.Nodes[1], 0);
std::cout << "==Before:==\n";
AC.Nodes[0].dumpSet(0);
AC.Nodes[1].dumpSet(0);
AC.Nodes[0].mustJoin(AC.Nodes[1]);
std::cout << "\n==After:==\n";
AC.Nodes[0].dumpSet(0);
for (auto B : AC.Nodes[0].Sets[0].Associativity) {
uint Age = B.first;
EXPECT_TRUE(AC.Nodes[0].Sets[0].Associativity[Age].Blocks.empty());
}
}
TEST(MustJoinTests, MustJoinDisjunctStatesAllSets) {
AbstractCache AC;
AC.addEmptyNode(0);
AC.addEmptyNode(1);
for (int I = 0; I < 16; I++) {
fillSetHighNumbers(AC.Nodes[0], I);
fillSet(AC.Nodes[1], I);
}
std::cout << "==Before:==\n";
AC.Nodes[0].dump();
AC.Nodes[1].dump();
AC.Nodes[0].mustJoin(AC.Nodes[1]);
std::cout << "\n==After:==\n";
AC.Nodes[0].dump();
for (auto Set : AC.Nodes[0].Sets) {
for (auto B : Set.second.Associativity) {
EXPECT_TRUE(B.second.Blocks.empty());
}
}
}
TEST(MustJoinTests, MustJoinDifferentStatesAllSets) {
AbstractCache AC;
AC.addEmptyNode(0);
AC.addEmptyNode(1);
for (int I = 0; I < 16; I++) {
if (I % 2)
counterFillSet(AC.Nodes[0], I);
fillSet(AC.Nodes[1], I);
}
std::cout << "==Before:==\n";
AC.Nodes[0].dump();
AC.Nodes[1].dump();
AC.Nodes[0].mustJoin(AC.Nodes[1]);
AC.Nodes[1].mustJoin(AC.Nodes[0]);
std::cout << "\n==After:==\n";
AC.Nodes[1].dump();
for (auto Set : AC.Nodes[1].Sets) {
for (auto B : Set.second.Associativity) {
uint SetNr = Set.first;
uint Age = B.first;
if (SetNr % 2) {
switch (Age) {
case 0:
EXPECT_TRUE(B.second.Blocks.empty());
break;
case 1:
EXPECT_EQ(B.second.Blocks.front(), 1);
break;
case 2:
EXPECT_EQ(B.second.Blocks.front(), 2);
break;
case 3:
// this test is not very exact the Set 0 with age 3 should contain
// (0,3) in arbitrary order
EXPECT_EQ(B.second.Blocks.size(), 2);
break;
default:
// should never be reached!
EXPECT_TRUE(false);
}
} else {
EXPECT_TRUE(B.second.Blocks.empty());
}
}
}
EXPECT_TRUE(AC.Nodes[1] == AC.Nodes[0]);
}

4
helper.sh
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@ -11,7 +11,7 @@ config () {
mkdir build
cd build
echo "==== Configuring cmake ===="
cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -DLT_LLVM_INSTALL_DIR=$LLVM_DIR ../CacheAnalysisPass/
cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=1 -DLT_LLVM_INSTALL_DIR=/usr ..
cd ..
cp build/compile_commands.json compile_commands.json
echo "==== Done! ===="
@ -27,7 +27,7 @@ compile () {
run () {
echo "==== Running $1 ===="
opt -load-pass-plugin build/libCacheAnalysisPass.so \
opt -load-pass-plugin build/lib/libCacheAnalysisPass.so \
-passes='lru-misses(function(loop-unroll-and-jam))' \
test/$1.ll -o /dev/null
#llvm-dis < out.bc > out.ll

47
include/AbstractCache.h
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@ -1,4 +1,3 @@
#ifndef ABSTRACHTCACHESTATE_H
#define ABSTRACHTCACHESTATE_H
@ -11,9 +10,6 @@
#include <ostream>
#include <utility>
#include <llvm/IR/BasicBlock.h>
#include <llvm/Support/raw_ostream.h>
#include "AbstractState.h"
#include "Address.h"
#include "ConcreteState.h"
@ -92,7 +88,7 @@ public: // everything is public, because IDGAF
}
Visited[Visitor.first] = true;
}
return false;
return Ret;
}
/**
@ -104,8 +100,6 @@ public: // everything is public, because IDGAF
void removeNestedLoops(
std::list<unsigned int> LoopBodyIn,
std::map<unsigned int, unsigned int> OrigNodeToUnrolledNode) {
unsigned int LoopHead = LoopBodyIn.front();
unsigned int LoopTail = LoopBodyIn.back();
unsigned int NestLoopTail;
for (unsigned int NodeNr : LoopBodyIn) {
bool IsLoopHead = false;
@ -294,34 +288,34 @@ public: // everything is public, because IDGAF
removeNestedLoops(LoopBody, OrigNodeToUnrolledNode);
if (Verbose && FoundLoopBody) {
llvm::outs() << "Found LoopHead @: " << NodeNr << "\n";
llvm::outs() << "With LoopTail @: " << LoopTail << "\n";
llvm::outs() << "With Body: {\n";
std::cout << "Found LoopHead @: " << NodeNr << "\n";
std::cout << "With LoopTail @: " << LoopTail << "\n";
std::cout << "With Body: {\n";
int I = 1;
for (auto Node : LoopBody) {
llvm::outs() << Node << ", ";
std::cout << Node << ", ";
if (!(I++ % 5)) {
llvm::outs() << "\n";
std::cout << "\n";
}
}
llvm::outs() << "}\n";
llvm::outs() << "Unrolled States: {\n";
std::cout << "}\n";
std::cout << "Unrolled States: {\n";
I = 1;
for (auto Node : LoopBody) {
llvm::outs() << OrigNodeToUnrolledNode[Node] << ", ";
std::cout << OrigNodeToUnrolledNode[Node] << ", ";
if (!(I++ % 5)) {
llvm::outs() << "\n";
std::cout << "\n";
}
}
llvm::outs() << "}\n";
std::cout << "}\n";
I = 1;
llvm::outs() << "OrigNodeToUnrolledNode: {\n";
std::cout << "OrigNodeToUnrolledNode: {\n";
for (auto Nr : OrigNodeToUnrolledNode) {
llvm::outs() << Nr.first << "->" << Nr.second << ", ";
std::cout << Nr.first << "->" << Nr.second << ", ";
if (!(I++ % 3))
llvm::outs() << "\n";
std::cout << "\n";
}
llvm::outs() << "}\n";
std::cout << "}\n";
}
}
}
@ -402,19 +396,19 @@ public: // everything is public, because IDGAF
*
*/
void dumpEdges() {
llvm::outs() << "Dumping Edges:\n";
std::cout << "Dumping Edges:\n";
for (auto const &E : Edges) {
llvm::outs() << E.first;
std::cout << E.first;
bool FirstPrint = true;
for (unsigned int To : E.second) {
if (FirstPrint) {
llvm::outs() << " -> " << To;
std::cout << " -> " << To;
FirstPrint = false;
} else {
llvm::outs() << ", " << To;
std::cout << ", " << To;
}
}
llvm::outs() << "\n";
std::cout << "\n";
}
}
@ -455,5 +449,6 @@ public: // everything is public, because IDGAF
Nodes[E.first].dump();
}
}
}; // namespace
#endif // ABSTRACHTCACHESTATE_H

64
include/AbstractState.h
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@ -12,8 +12,6 @@
#include <sstream>
#include <string>
#include <llvm/Support/raw_ostream.h>
#include "Address.h"
// Forward declarations
@ -103,8 +101,8 @@ public: // everything is public, because IDGAF
void setUnrolled(unsigned int In) { Unrolled = In; }
bool operator==(AbstractState In) {
for (int Index; Index < 16; Index++) {
for (int Age; Age < 4; Age++) {
for (int Index = 0; Index < 16; Index++) {
for (int Age = 0; Age < 4; Age++) {
for (auto E1 : Sets[Index].Associativity[Age].Blocks) {
// find E1 in In States Set and Age.
if (std::find(In.Sets[Index].Associativity[Age].Blocks.begin(),
@ -228,46 +226,60 @@ public: // everything is public, because IDGAF
}
}
if (Verbose) {
llvm::outs() << "Before:\n";
std::cout << "Before:\n";
this->dump();
}
// update this with PreAddr
this->update(PreAddr);
if (Verbose) {
llvm::outs() << "Update Tag: " << PreAddr.Tag << "\n";
llvm::outs() << "Update Set: " << PreAddr.Index << "\n";
llvm::outs() << "After:\n";
std::cout << "Update Tag: " << PreAddr.Tag << "\n";
std::cout << "Update Set: " << PreAddr.Index << "\n";
std::cout << "After:\n";
this->dump();
}
}
void dump() {
llvm::outs() << Addr << " {\n";
llvm::outs() << "Unrolled: " << Unrolled << "\n";
llvm::outs() << "Computed: " << Computed << "\n";
llvm::outs() << "Predecessors: ";
for (auto PreNr : Predecessors) {
llvm::outs() << PreNr << " ";
}
llvm::outs() << "\n";
void dumpSet(unsigned int Set) {
std::cout << Addr << " {\n";
llvm::outs() << "Successors: ";
for (auto SuccNr : Successors) {
llvm::outs() << SuccNr << " ";
std::cout << "Set[" << Set << "]: \n";
for (auto EntryPair : this->Sets[Set].Associativity) {
std::cout << " Age[" << EntryPair.first << "]: ";
for (auto Block : EntryPair.second.Blocks) {
std::cout << Block << " ";
}
llvm::outs() << "\n";
std::cout << "\n";
}
std::cout << "}\n";
}
void dump() {
std::cout << Addr << " {\n";
std::cout << "Unrolled: " << Unrolled << "\n";
std::cout << "Computed: " << Computed << "\n";
std::cout << "Predecessors: ";
for (auto PreNr : Predecessors) {
std::cout << PreNr << " ";
}
std::cout << "\n";
std::cout << "Successors: ";
for (auto SuccNr : Successors) {
std::cout << SuccNr << " ";
}
std::cout << "\n";
for (auto SetPair : Sets) {
llvm::outs() << "Set[" << SetPair.first << "]: \n";
std::cout << "Set[" << SetPair.first << "]: \n";
for (auto EntryPair : SetPair.second.Associativity) {
llvm::outs() << " Age[" << EntryPair.first << "]: ";
std::cout << " Age[" << EntryPair.first << "]: ";
for (auto Block : EntryPair.second.Blocks) {
llvm::outs() << Block << " ";
std::cout << Block << " ";
}
llvm::outs() << "\n";
std::cout << "\n";
}
}
llvm::outs() << "}\n";
std::cout << "}\n";
}
}; // namespace
#endif // STATE_H