private static void PopulateStore(int count)
{
using var s = h.For(new CacheFunctions(sizeTracker)).NewSession <CacheFunctions>();
Random r = new Random(0);
Console.WriteLine("Writing random keys to fill cache");
for (int i = 0; i < count; i++)
{
int k = r.Next(DbSize);
var key = new CacheKey(k, 1 + r.Next(MaxKeySize - 1));
var value = new CacheValue(1 + r.Next(MaxValueSize - 1), (byte)key.key);
s.Upsert(ref key, ref value);
}
}
private static void RandomWorkload(int threadid)
{
Console.WriteLine("Issuing {0} random read workload of {1} reads from thread {2}", UseUniform ? "uniform" : "zipf", DbSize, threadid);
using var session = h.For(new CacheFunctions(sizeTracker)).NewSession <CacheFunctions>();
var rnd = new Random(threadid);
var zipf = new ZipfGenerator(rnd, DbSize, Theta);
CacheValue output = default;
int localStatusFound = 0, localStatusNotFound = 0;
int i = 0;
while (true)
{
if ((i % 256 == 0) && (i > 0))
{
Interlocked.Add(ref statusFound, localStatusFound);
Interlocked.Add(ref statusNotFound, localStatusNotFound);
Interlocked.Add(ref totalReads, 256);
localStatusFound = localStatusNotFound = 0;
}
int op = WritePercent == 0 ? 0 : rnd.Next(100);
long k = UseUniform ? rnd.Next(DbSize) : zipf.Next();
var key = new CacheKey(k, 1 + rnd.Next(MaxKeySize - 1));
if (op < WritePercent)
{
var value = new CacheValue(1 + rnd.Next(MaxValueSize - 1), (byte)key.key);
session.Upsert(ref key, ref value);
}
else
{
var status = session.Read(ref key, ref output);
switch (status)
{
case Status.NOTFOUND:
localStatusNotFound++;
if (UpsertOnCacheMiss)
{
var value = new CacheValue(1 + rnd.Next(MaxValueSize - 1), (byte)key.key);
session.Upsert(ref key, ref value);
}
break;
case Status.OK:
localStatusFound++;
if (output.value[0] != (byte)key.key)
{
throw new Exception("Read error!");
}
break;
default:
throw new Exception("Error!");
}
}
i++;
}
}
private static void RandomWorkload(int threadid)
{
Console.WriteLine("Issuing {0} random read workload of {1} reads from thread {2}", UseUniform ? "uniform" : "zipf", DbSize, threadid);
using var session = h.For(new CacheFunctions()).NewSession <CacheFunctions>();
var rnd = new Random(threadid);
var zipf = new ZipfGenerator(rnd, DbSize, Theta);
int statusNotFound = 0;
int statusFound = 0;
CacheValue output = default;
int i = 0;
while (true)
{
if ((i % 256 == 0) && (i > 0))
{
Interlocked.Add(ref totalReads, 256);
if (i % (1024 * 1024 * 16) == 0) // report after every 16M ops
{
Console.WriteLine("Hit rate: {0:N2}; Evict count: {1}", statusFound / (double)(statusFound + statusNotFound), LogObserver.EvictCount);
}
}
int op = WritePercent == 0 ? 0 : rnd.Next(100);
long k = UseUniform ? rnd.Next(DbSize) : zipf.Next();
var key = new CacheKey(k);
if (op < WritePercent)
{
var value = new CacheValue(k);
session.Upsert(ref key, ref value);
}
else
{
var status = session.Read(ref key, ref output);
switch (status)
{
case Status.NOTFOUND:
statusNotFound++;
if (UpsertOnCacheMiss)
{
var value = new CacheValue(k);
session.Upsert(ref key, ref value);
}
break;
case Status.OK:
statusFound++;
if (output.value != key.key)
{
throw new Exception("Read error!");
}
break;
default:
throw new Exception("Error!");
}
}
i++;
}
}
private static void RandomWorkload(int threadid)
{
Console.WriteLine("Issuing {0} random read workload of {1} reads from thread {2}", UseUniform ? "uniform" : "zipf", DbSize, threadid);
using var session = h.For(new CacheFunctions(sizeTracker)).NewSession <CacheFunctions>();
var rnd = new Random(threadid);
var zipf = new ZipfGenerator(rnd, DbSize, Theta);
int statusNotFound = 0;
int statusFound = 0;
CacheValue output = default;
int i = 0;
while (true)
{
if ((i % 256 == 0) && (i > 0))
{
Interlocked.Add(ref totalReads, 256);
if (i % (1024 * 1024 * 16) == 0) // report after every 16M ops
{
Console.WriteLine("Hit rate: {0:N2}; Memory footprint: {1:N2}KB", statusFound / (double)(statusFound + statusNotFound), sizeTracker.TotalSize / (double)1024);
// GC -> report -> pause to verify accurate memory reporting
/*
* GC.Collect();
* GC.WaitForFullGCComplete();
* Console.WriteLine("Hit rate: {0:N2}; Memory footprint: {1:N2}KB", statusFound / (double)(statusFound + statusNotFound), sizeTracker.TotalSize / (double)1024);
* Thread.Sleep(1000000);
*/
}
}
int op = WritePercent == 0 ? 0 : rnd.Next(100);
long k = UseUniform ? rnd.Next(DbSize) : zipf.Next();
var key = new CacheKey(k, 1 + rnd.Next(MaxKeySize - 1));
if (op < WritePercent)
{
var value = new CacheValue(1 + rnd.Next(MaxValueSize - 1), (byte)key.key);
session.Upsert(ref key, ref value);
}
else
{
var status = session.Read(ref key, ref output);
switch (status)
{
case Status.NOTFOUND:
statusNotFound++;
if (UpsertOnCacheMiss)
{
var value = new CacheValue(1 + rnd.Next(MaxValueSize - 1), (byte)key.key);
session.Upsert(ref key, ref value);
}
break;
case Status.OK:
statusFound++;
if (output.value[0] != (byte)key.key)
{
throw new Exception("Read error!");
}
break;
default:
throw new Exception("Error!");
}
}
i++;
}
}
