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();
}
