public static void Run()
{
var x = 0;
const int iterations = 10000000;
Stopwatch sw = Stopwatch.StartNew();
// x递增1000w,需要多长时间
for (int i = 0; i < iterations; i++)
{
x++;
}
Console.WriteLine($"Incrementing x: {sw.ElapsedMilliseconds:N0}");
sw.Restart();
// 加上一个调用什么都不做的方法的开销，需要多久
for (int i = 0; i < iterations; i++)
{
Nothing();
x++;
Nothing();
}
Console.WriteLine($"Incrementing x in Nothing: {sw.ElapsedMilliseconds:N0}");
// 加上一个无竞争的SpinLock的开销，需要多久
SpinLock sl = new SpinLock(false);
sw.Restart();
for (int i = 0; i < iterations; i++)
{
bool taken = false;
sl.Enter(ref taken);
x++;
sl.Exit();
}
Console.WriteLine($"Incrementing x in SpinLock: {sw.ElapsedMilliseconds:N0}");
// 加上调用一个无竞争的SimpleWaitLock的开销，需要多久
using (SimpleWaitLock swl = new SimpleWaitLock())
{
sw.Restart();
for (int i = 0; i < iterations; i++)
{
swl.Enter();
x++;
swl.Leave();
}
Console.WriteLine($"Incrementing x in SimpleWaitLock: {sw.ElapsedMilliseconds:N0}");
}
}
public static void Go()
{
Int32 x = 0;
const Int32 iterations = 10000000; // 10 million
// How long does it take to increment x 10 million times?
Stopwatch sw = Stopwatch.StartNew();
for (Int32 i = 0; i < iterations; i++)
{
x++;
}
Console.WriteLine("Incrementing x: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling a method that does nothing?
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
M(); x++; M();
}
Console.WriteLine("Incrementing x in M: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling an uncontended SimpleSpinLock?
SimpleSpinLock ssl = new SimpleSpinLock();
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
ssl.Enter(); x++; ssl.Leave();
}
Console.WriteLine("Incrementing x in SimpleSpinLock: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling an uncontended SpinLock?
SpinLock sl = new SpinLock(false);
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
Boolean taken = false;
sl.Enter(ref taken); x++; sl.Exit(false);
}
Console.WriteLine("Incrementing x in SpinLock: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling an uncontended SimpleWaitLock?
using (SimpleWaitLock swl = new SimpleWaitLock()) {
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
swl.Enter(); x++; swl.Leave();
}
Console.WriteLine("Incrementing x in SimpleWaitLock: {0:N0}", sw.ElapsedMilliseconds);
}
Console.ReadLine();
}
static void Main()
{
#pragma warning disable 219
int x = 0;
#pragma warning restore 219
const int iterations = 10000000; // 10 миллионов
// Note: Сколько времени займет инкремент x 10 миллионов раз?
Stopwatch stopwatch = Stopwatch.StartNew();
for (int i = 0; i < iterations; i++)
{
x++;
}
Console.WriteLine("Incrementing x: {0:N0}", stopwatch.ElapsedMilliseconds);
// Note: Сколько времени займет инкремент x 10 миллионов раз, если
// добавить вызов ничего не делающего метода?
stopwatch.Restart();
for (int i = 0; i < iterations; i++)
{
Dummy();
x++;
Dummy();
}
Console.WriteLine("Incrementing x in Dummy: {0:N0}", stopwatch.ElapsedMilliseconds);
// Note: Сколько времени займет инкремент x 10 миллионов раз, если
// добавить вызов неконкурирующего объекта SpinLock
var spinLock = new SpinLock();
stopwatch.Restart();
for (int i = 0; i < iterations; i++)
{
bool lockTaken = false;
spinLock.Enter(ref lockTaken);
x++;
spinLock.Exit();
}
Console.WriteLine("Incrementing x in SpinLock: {0:N0}", stopwatch.ElapsedMilliseconds);
// Note: Сколько времени займет инкремент x 10 миллионов раз, если
// добавить вызов неконкурирующего объекта SimpleWaitLock?
using (var waitLock = new SimpleWaitLock())
{
stopwatch.Restart();
for (int i = 0; i < iterations; i++)
{
waitLock.Enter();
x++;
waitLock.Leave();
}
Console.WriteLine("Incrementing x in SimpleWaitLock: {0:N0}", stopwatch.ElapsedMilliseconds);
}
}
public static void Go()
{
int x = 0;
const int iterations = 1000000;
Stopwatch sw = Stopwatch.StartNew();
for (int i = 0; i < iterations; i++)
{
x++;
}
Console.WriteLine("Incrementing x: {0:N0}", sw.ElapsedMilliseconds);
sw.Restart();
for (int i = 0; i < iterations; i++)
{
M(); x++; M();
}
Console.WriteLine("Incrementing x in M: {0:N0}", sw.ElapsedMilliseconds);
SimpleSpinLock ssl = new SimpleSpinLock();
sw.Restart();
for (int i = 0; i < iterations; i++)
{
ssl.Enter(); x++; ssl.Leave();
}
Console.WriteLine("Incrementing x in SimpleSpinLock:{0:N0}", sw.ElapsedMilliseconds);
SpinLock sl = new SpinLock(false);
sw.Restart();
for (int i = 0; i < iterations; i++)
{
bool taken = false;
sl.Enter(ref taken); x++; sl.Exit(false);
}
Console.WriteLine("Incrementing x in SpinLock: {0:N0}", sw.ElapsedMilliseconds);
using (SimpleWaitLock swl = new SimpleWaitLock())
{
sw.Restart();
for (int i = 0; i < iterations; i++)
{
swl.Enter(); x++; swl.Leave();
}
Console.WriteLine("Incrementing x in SimpleWaitLock: {0:N0}", sw.ElapsedMilliseconds);
}
Console.ReadLine();
}
public static void Go()
{
int x = 0;
const int iterations = 10000000; // 10 million
Stopwatch sw = Stopwatch.StartNew();
for (Int32 i = 0; i < iterations; i++)
{
x++;
}
Console.WriteLine("Incrementing x: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling a method that does nothing?
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
M(); x++; M();
}
Console.WriteLine("Incrementing x in M: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling an uncontended SpinLock?
SpinLock sl = new SpinLock(false);
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
Boolean taken = false;
sl.Enter(ref taken); x++; sl.Exit(false);
}
Console.WriteLine("Incrementing x in SpinLock: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
var shl = new SimpleHybridLock();
shl.Enter();
x++;
shl.Leave();
sw.Restart();
for (int i = 0; i < iterations; i++)
{
shl.Enter();
x++;
shl.Leave();
}
Console.WriteLine("Incrementing x in SimpleHybridLock: {0:N0}", sw.ElapsedMilliseconds);
using (var ahl = new AnotherHybridLock())
{
ahl.Enter();
x++;
ahl.Leave();
sw.Restart();
for (int i = 0; i < iterations; i++)
{
ahl.Enter();
x++;
ahl.Leave();
}
Console.WriteLine("Incrementing x in AnotherHybridLock: {0:N0}", sw.ElapsedMilliseconds);
}
using (SimpleWaitLock swl = new SimpleWaitLock())
{
sw.Restart();
for (Int32 i = 0; i < iterations; i++)
{
swl.Enter(); x++; swl.Leave();
}
Console.WriteLine("Incrementing x in SimpleWaitLock: {0:N0}", sw.ElapsedMilliseconds);
}
//using (var oml = new OneManyLock())
//{
//}
//using (var rwls = new ReaderWriterLockSlim(LockRecursionPolicy.NoRecursion))
//{
// rwls
//}
}
public static void Go() {
Int32 x = 0;
const Int32 iterations = 10000000; // 10 million
// How long does it take to increment x 10 million times?
Stopwatch sw = Stopwatch.StartNew();
for (Int32 i = 0; i < iterations; i++) {
x++;
}
Console.WriteLine("Incrementing x: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling a method that does nothing?
sw.Restart();
for (Int32 i = 0; i < iterations; i++) {
M(); x++; M();
}
Console.WriteLine("Incrementing x in M: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling an uncontended SimpleSpinLock?
SimpleSpinLock ssl = new SimpleSpinLock();
sw.Restart();
for (Int32 i = 0; i < iterations; i++) {
ssl.Enter(); x++; ssl.Leave();
}
Console.WriteLine("Incrementing x in SimpleSpinLock: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling an uncontended SpinLock?
SpinLock sl = new SpinLock(false);
sw.Restart();
for (Int32 i = 0; i < iterations; i++) {
Boolean taken = false;
sl.Enter(ref taken); x++; sl.Exit(false);
}
Console.WriteLine("Incrementing x in SpinLock: {0:N0}", sw.ElapsedMilliseconds);
// How long does it take to increment x 10 million times
// adding the overhead of calling an uncontended SimpleWaitLock?
using (SimpleWaitLock swl = new SimpleWaitLock()) {
sw.Restart();
for (Int32 i = 0; i < iterations; i++) {
swl.Enter(); x++; swl.Leave();
}
Console.WriteLine("Incrementing x in SimpleWaitLock: {0:N0}", sw.ElapsedMilliseconds);
}
Console.ReadLine();
}
public void AccessBySimpleWaitLock()
{
swlock.Enter();
_resource++;
swlock.Leave();
}