public void MimallocAllocFreePerf()
{
var h = Mem.HeapNew();
Mem.OptionSetEnabled(Mem.Option.EagerCommit, true);
Mem.OptionSetEnabled(Mem.Option.LargeOsPages, true);
Mem.OptionSetEnabled(Mem.Option.ResetDecommits, true);
Mem.OptionSetEnabled(Mem.Option.PageReset, true);
Mem.OptionSetEnabled(Mem.Option.SegmentReset, true);
Mem.OptionSetEnabled(Mem.Option.AbandonedPageReset, true);
Mem.OptionSet(Mem.Option.ResetDelay, 0);
Mem.OptionSetEnabled(Mem.Option.EagerRegionCommit, true);
Mem.RegisterOutput((str, arg) => { Console.Write(str); }, null);
Assert.IsTrue(Mem.OptionIsEnabled(Mem.Option.PageReset));
var count = 100_000L;
var size = 32 * 4096;
IntPtr[] ptrs = new IntPtr[count];
for (int r = 0; r < 4; r++)
{
Task.Factory.StartNew(() =>
{
using (Benchmark.Run("Alloc" + r, (long)(count * size / 1000.0)))
{
for (int i = 0; i < count; i++)
{
ptrs[i] = (IntPtr)Mem.HeapMalloc(h, (UIntPtr)size);
if ((long)(ptrs[i]) % 4096 != 0)
{
Assert.Fail(((long)(ptrs[i]) % 4096).ToString());
// Console.WriteLine((long)(ptrs[i]) % 4096);
}
for (int j = 0; j < size; j += 4096)
{
((byte *)ptrs[i])[j] = 0;
}
((byte *)ptrs[i])[size - 1] = 0;
}
}
}
, TaskCreationOptions.LongRunning).Wait();
Task.Factory.StartNew(() =>
{
using (Benchmark.Run("Free" + r, (long)(count * size / 1000.0)))
{
for (long i = count - 1; i >= 0; i--)
{
Mem.Free((byte *)ptrs[i]);
}
// Mem.HeapCollect(h, true);
}
}
, TaskCreationOptions.LongRunning).Wait();
}
Mem.StatsPrint();
// long x = 0;
// while (true)
// {
// x++;
//
// ptrs[0] = (IntPtr) Spreads.Native.Mem.Malloc((UIntPtr) size);
// Mem.Free((byte*) ptrs[0]);
// if (x == long.MaxValue)
// break;
//
// Thread.Sleep(1);
// }
//
// // Spreads.Native.Mem.Collect(false);
//
//
// Thread.Sleep(10000000);
}
public void MimallocAllocFreeCallLatency()
{
Mem.OptionSetEnabled(Mem.Option.EagerCommit, true);
Mem.OptionSetEnabled(Mem.Option.LargeOsPages, true);
Mem.OptionSetEnabled(Mem.Option.ResetDecommits, true);
Mem.OptionSetEnabled(Mem.Option.PageReset, true);
Mem.OptionSetEnabled(Mem.Option.SegmentReset, true);
Mem.OptionSetEnabled(Mem.Option.AbandonedPageReset, true);
// Mem.OptionSet(Mem.Option.ResetDelay, 0);
Mem.OptionSetEnabled(Mem.Option.EagerRegionCommit, true);
Mem.RegisterOutput((str, arg) => { Console.Write(str); }, null);
var rng = new Random();
var allocated = 0L;
var h = Mem.HeapNew();
var count = 100_000L;
var size = 32 * 4096;
IntPtr[] ptrs = new IntPtr[count];
for (int r = 0; r < 4; r++)
{
var histogram = new HdrHistogram.LongHistogram(1, 1000000, 1);
using (Benchmark.Run("AllocFree" + r, count))
{
for (int i = 0; i < count; i++)
{
var x = rng.NextDouble();
var start = Stopwatch.GetTimestamp();
if (allocated < 1000)
{
Allocate();
}
else if (allocated > 2000)
{
Free();
}
else if (((2000 - allocated) / 1000.0 * x) > 0.5)
{
Allocate();
}
else
{
Free();
}
var time = Stopwatch.GetTimestamp() - start;
histogram.RecordValue(time);
void Allocate()
{
ptrs[allocated] = (IntPtr)Mem.HeapMalloc(h, (UIntPtr)size);
for (int j = 0; j < size; j += 4096)
{
((byte *)ptrs[allocated])[j] = 0;
}
((byte *)ptrs[allocated])[size - 1] = 0;
allocated++;
}
void Free()
{
Mem.Free((byte *)ptrs[allocated - 1]);
allocated--;
}
}
}
histogram.OutputPercentileDistribution(Console.Out,
outputValueUnitScalingRatio: OutputScalingFactor.TimeStampToMicroseconds);
}
Mem.StatsPrint();
}
public void Lz4Benchmark()
{
const string name = "LZ4";
var count = ItemCount;
var bufferLen = count * Unsafe.SizeOf <TestValue>();
var originalPtr = (byte *)Marshal.AllocHGlobal(bufferLen);
var compressedPtr = (byte *)Marshal.AllocHGlobal(bufferLen * 2);
var decompressedPtr = (byte *)Marshal.AllocHGlobal(bufferLen);
for (int i = 0; i < count; i++)
{
((TestValue *)originalPtr)[i] = new TestValue()
{
//Dbl = (double)i + 1 / (double)(i + 1),
//Dbl1 = (double)i + 1 / (double)(i + 1),
Num = i,
Num1 = i,
};
}
for (int level = 1; level < 10; level++)
{
var compressedLen = Compression.compress_lz4(originalPtr, (IntPtr)bufferLen, compressedPtr,
(IntPtr)(bufferLen * 2), level);
var decompressedLen = Compression.decompress_lz4(compressedPtr, (IntPtr)compressedLen, decompressedPtr, (IntPtr)bufferLen);
Console.WriteLine($"{name} Level: {level}, ratio: {1.0 * decompressedLen / compressedLen}");
Assert.AreEqual(bufferLen, decompressedLen);
Assert.IsTrue(new Span <byte>(originalPtr, bufferLen).SequenceEqual(new Span <byte>(decompressedPtr, bufferLen)));
}
Console.WriteLine("-------------------------------");
var rounds = 3;
var iterations = Iterations / 10;
for (int r = 0; r < rounds; r++)
{
for (int level = 1; level < 10; level++)
{
int compressedLen = 0;
using (Benchmark.Run($"{name} W{level}", bufferLen * iterations, true))
{
for (int i = 0; i < iterations; i++)
{
compressedLen = Compression.compress_lz4(originalPtr, (IntPtr)bufferLen, compressedPtr,
(IntPtr)bufferLen, level);
}
}
using (Benchmark.Run($"{name} R{level}", bufferLen * iterations, true))
{
for (int i = 0; i < iterations; i++)
{
Compression.decompress_lz4(compressedPtr, (IntPtr)compressedLen, decompressedPtr, (IntPtr)bufferLen);
}
}
}
}
Benchmark.Dump();
}