Linux build script and some platform code fixes for Linux.

perfaware/part2/build.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+if [ -z "${CXX}" ]; then
+    echo "WARNING: Environment variable CXX not set."
+    exit
+fi
+# Check if `${CXX}` is in the PATH
+if ! command -v ${CXX} &> /dev/null; then
+    echo "WARNING: ${CXX} not found -- executables will not be built"
+    echo "Set CXX environment variable to a working C++ compiler."
+    exit
+fi
+
+# Set buildpat based on the first script argument
+if [ -z "$1" ]; then
+    for g in ./*_main.cpp ; do
+        ./build_single.sh "$g"
+    done
+else
+    for g in ./*$1*_main.cpp ; do
+        ./build_single.sh "$g"
+    done
+fi

perfaware/part2/build_asm.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Check if `nasm` is in the PATH
+if ! command -v nasm &> /dev/null; then
+    echo "WARNING: nasm not found -- ASM libs will not be built"
+fi
+
+# Set buildpat based on the first script argument
+if [ -z "$1" ]; then
+    buildpat="*.asm"
+    for g in ./*asm ; do
+        ./build_single_asm.sh "$g"
+    done
+else
+    for g in ./*$1*.asm ; do
+        ./build_single_asm.sh "$g"
+    done
+fi
+

perfaware/part2/build_single.sh

@@ -0,0 +1,22 @@
+#!/bin/bash -x
+
+# Create 'build' directory if it does not exist
+if [ ! -d build ]; then
+  mkdir build
+fi
+pushd build
+
+# Check if `clang++` is in the PATH and compile with `clang++` if available
+if command -v ${CXX} &> /dev/null; then
+  # Extract the filename without extension from the first argument
+  filename=$(basename -- "$1")
+  extension="${filename##*.}"
+  filename="${filename%.*}"
+
+  # Compile with clang++
+  ${CXX} -mavx2 -g -Wall -fuse-ld=lld ../"$1" -L . -o "${filename}_dc"
+  ${CXX} -mavx2 -O3 -g -Wall -fuse-ld=lld ../"$1" -L . -o "${filename}_rc"
+fi
+
+popd
+

perfaware/part2/build_single_asm.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Create 'build' directory if it does not exist
+if [ ! -d build ]; then
+  mkdir build
+fi
+pushd build
+
+# Check if `nasm` is in the PATH and compile with `nasm` if available
+if command -v nasm &> /dev/null; then
+  # Extract the filename without extension from the first argument
+  filename=$(basename -- "$1")
+  extension="${filename##*.}"
+  filename="${filename%.*}"
+
+  # Compile with nasm
+  nasm -f elf64 -o "${filename}.o" ../"$1"
+
+  # Create a static library from the object file, using 'ar' as a likely substitute for 'lib'
+  ar rcs "${filename}.a" "${filename}.o"
+fi
+
+popd
+

perfaware/part3/build.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+if [ -z "${CXX}" ]; then
+    echo "WARNING: Environment variable CXX not set."
+    exit
+fi
+# Check if `${CXX}` is in the PATH
+if ! command -v ${CXX} &> /dev/null; then
+    echo "WARNING: ${CXX} not found -- executables will not be built"
+    echo "Set CXX environment variable to a working C++ compiler."
+    exit
+fi
+
+# Set buildpat based on the first script argument
+if [ -z "$1" ]; then
+    for g in ./*_main.cpp ; do
+        ./build_single.sh "$g"
+    done
+else
+    for g in ./*$1*_main.cpp ; do
+        ./build_single.sh "$g"
+    done
+fi

perfaware/part3/build_asm.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Check if `nasm` is in the PATH
+if ! command -v nasm &> /dev/null; then
+    echo "WARNING: nasm not found -- ASM libs will not be built"
+fi
+
+# Set buildpat based on the first script argument
+if [ -z "$1" ]; then
+    buildpat="*.asm"
+    for g in ./*asm ; do
+        ./build_single_asm.sh "$g"
+    done
+else
+    for g in ./*$1*.asm ; do
+        ./build_single_asm.sh "$g"
+    done
+fi
+

perfaware/part3/build_single.sh

@@ -0,0 +1,22 @@
+#!/bin/bash -x
+
+# Create 'build' directory if it does not exist
+if [ ! -d build ]; then
+  mkdir build
+fi
+pushd build
+
+# Check if `clang++` is in the PATH and compile with `clang++` if available
+if command -v ${CXX} &> /dev/null; then
+  # Extract the filename without extension from the first argument
+  filename=$(basename -- "$1")
+  extension="${filename##*.}"
+  filename="${filename%.*}"
+
+  # Compile with clang++
+  ${CXX} -mavx2 -g -Wall -fuse-ld=lld ../"$1" -L . -o "${filename}_dc"
+  ${CXX} -mavx2 -O3 -g -Wall -fuse-ld=lld ../"$1" -L . -o "${filename}_rc"
+fi
+
+popd
+

perfaware/part3/build_single_asm.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+
+# Create 'build' directory if it does not exist
+if [ ! -d build ]; then
+  mkdir build
+fi
+pushd build
+
+# Check if `nasm` is in the PATH and compile with `nasm` if available
+if command -v nasm &> /dev/null; then
+  # Extract the filename without extension from the first argument
+  filename=$(basename -- "$1")
+  extension="${filename##*.}"
+  filename="${filename%.*}"
+
+  # Compile with nasm
+  nasm -f elf64 -o "${filename}.o" ../"$1"
+
+  # Create a static library from the object file, using 'ar' as a likely substitute for 'lib'
+  ar rcs "${filename}.a" "${filename}.o"
+fi
+
+popd
+

perfaware/part3/listing_0102_read_overhead_test.cpp

@@ -14,9 +14,11 @@
    LISTING 102
    ======================================================================== */
 
+#if _WIN32
 #include <windows.h>
-#include <fcntl.h>
 #include <io.h>
+#endif
+#include <fcntl.h>
 
 struct read_parameters
 {
@@ -57,6 +59,8 @@ static void ReadViaFRead(repetition_tester *Tester, read_parameters *Params)
     }
 }
 
+#if _WIN32
+
 static void ReadViaRead(repetition_tester *Tester, read_parameters *Params)
 {
     while(IsTesting(Tester))
@@ -149,3 +153,4 @@ static void ReadViaReadFile(repetition_tester *Tester, read_parameters *Params)
         }
     }
 }
+#endif

perfaware/part3/listing_0104_read_overhead_main.cpp

@@ -53,8 +53,10 @@ struct test_function
 test_function TestFunctions[] =
 {
     {"fread", ReadViaFRead},
+#if _WIN32
     {"_read", ReadViaRead},
     {"ReadFile", ReadViaReadFile},
+#endif
 };
 
 int main(int ArgCount, char **Args)

perfaware/part3/listing_0108_platform_metrics.cpp

@@ -64,6 +64,7 @@ static void InitializeOSMetrics(void)
 
 #include <x86intrin.h>
 #include <sys/time.h>
+#include <sys/resource.h>
 
 static u64 GetOSTimerFreq(void)
 {

perfaware/part3/listing_0109_pagefault_repetition_tester.cpp

@@ -87,13 +87,13 @@ static void PrintValue(char const *Label, repetition_value Value, u64 CPUTimerFr
     if(CPUTimerFreq)
     {
         f64 Seconds = SecondsFromCPUTime(E[RepValue_CPUTimer], CPUTimerFreq);
-        printf(" (%fms)", 1000.0f*Seconds);
+        printf(" (%8.3fms)", 1000.0f*Seconds);
 
         if(E[RepValue_ByteCount] > 0)
         {
             f64 Gigabyte = (1024.0f * 1024.0f * 1024.0f);
             f64 Bandwidth = E[RepValue_ByteCount] / (Gigabyte * Seconds);
-            printf(" %fgb/s", Bandwidth);
+            printf(" %9.4fgb/s", Bandwidth);
         }
     }
 
@@ -146,6 +146,7 @@ static void NewTestWave(repetition_tester *Tester, u64 TargetProcessedByteCount,
 
     Tester->TryForTime = SecondsToTry*CPUTimerFreq;
     Tester->TestsStartedAt = ReadCPUTimer();
+    //printf("\n"); // Move to the next line to start the live Min reporting.
 }
 
 static void BeginTime(repetition_tester *Tester)
@@ -215,8 +216,14 @@ static b32 IsTesting(repetition_tester *Tester)
 
                     if(Tester->PrintNewMinimums)
                     {
+#if !_WIN32
+                        printf("\033[2K\r");
+#endif
                         PrintValue("Min", Results->Min, Tester->CPUTimerFreq);
+#if _WIN32
                         printf("                                   \r");
+#endif
+                        fflush(stdout);
                     }
                 }
 

perfaware/part3/listing_0126_os_platform.cpp

@@ -97,11 +97,13 @@ static void InitializeOSPlatform(void)
 
 #include <x86intrin.h>
 #include <sys/time.h>
+#include <sys/resource.h>
 
 struct os_platform
 {
     b32 Initialized;
     u64 CPUTimerFreq;
+    u64 LargePageSize; // NOTE(casey): This will be 0 when large pages are not supported (which is most of the time!)
 };
 static os_platform GlobalOSPlatform;
 
@@ -143,6 +145,7 @@ static void InitializeOSPlatform(void)
     {
         GlobalOSPlatform.Initialized = true;
         GlobalOSPlatform.CPUTimerFreq = EstimateCPUTimerFreq();
+        GlobalOSPlatform.LargePageSize = 2048 * 1024;
     }
 }
 

perfaware/part3/listing_0137_os_platform.cpp

@@ -114,11 +114,18 @@ static void InitializeOSPlatform(void)
 
 #include <x86intrin.h>
 #include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <unistd.h>
 
 struct os_platform
 {
     b32 Initialized;
     u64 CPUTimerFreq;
+    u64 LargePageSize; // NOTE(casey): This will be 0 when large pages are not supported (which is most of the time!)
 };
 static os_platform GlobalOSPlatform;
 
@@ -167,7 +174,7 @@ static b32 ReadOSRandomBytes(u64 Count, void *Dest)
     // and do multiple read()'s to make sure you filled the entire buffer.
 
     int DevRandom = open("/dev/urandom", O_RDONLY);
-    b32 Result = (read(DevRandom, Dest.Data, Dest.Count) == Count);
+    b32 Result = (read(DevRandom, Dest, Count) == Count);
     close(DevRandom);
 
     return Result;
@@ -179,6 +186,7 @@ static void InitializeOSPlatform(void)
     {
         GlobalOSPlatform.Initialized = true;
         GlobalOSPlatform.CPUTimerFreq = EstimateCPUTimerFreq();
+        GlobalOSPlatform.LargePageSize = 2048 * 1024;
     }
 }
 
@@ -252,4 +260,4 @@ inline void FillWithRandomBytes(buffer Dest)
         ReadOSRandomBytes(ReadCount, Dest.Data + AtOffset);
         AtOffset += ReadCount;
     }
-}
+}