public void CacheManager_Stats_Threaded <T>(T cache)
where T : ICacheManager <object>
{
var puts = cache.CacheHandles.Select(p => p.Stats.GetStatistic(CacheStatsCounterType.PutCalls));
var adds = cache.CacheHandles.Select(p => p.Stats.GetStatistic(CacheStatsCounterType.AddCalls));
var threads = 5;
var iterations = 10;
using (cache)
{
var key = Guid.NewGuid().ToString();
ThreadTestHelper.Run(
() =>
{
cache.Add(key, "hi");
cache.Put(key, "changed");
},
threads,
iterations);
}
// item should have been added only once (not true in back plate scenarios)
if (!cache.Configuration.HasBackPlate)
{
adds.ShouldAllBeEquivalentTo(
Enumerable.Repeat(1, cache.CacheHandles.Count()));
}
puts.ShouldAllBeEquivalentTo(
Enumerable.Repeat(threads * iterations, cache.CacheHandles.Count()));
}
public void Redis_NoRaceCondition_WithUpdate()
{
using (var cache = CacheFactory.Build <RaceConditionTestElement>(settings =>
{
settings.WithMaxRetries(int.MaxValue);
settings.WithUpdateMode(CacheUpdateMode.Full)
.WithJsonSerializer()
.WithRedisCacheHandle("default")
.WithExpiration(ExpirationMode.Absolute, TimeSpan.FromMinutes(20));
settings.WithRedisConfiguration("default", config =>
{
config.WithAllowAdmin()
.WithDatabase(7)
.WithEndpoint("127.0.0.1", 6379);
});
}))
{
var key = Guid.NewGuid().ToString();
cache.Remove(key);
cache.Add(key, new RaceConditionTestElement()
{
Counter = 0
});
int numThreads = 5;
int iterations = 10;
int numInnerIterations = 10;
int countCasModifyCalls = 0;
// act
ThreadTestHelper.Run(
() =>
{
for (int i = 0; i < numInnerIterations; i++)
{
cache.Update(
key,
(value) =>
{
value.Counter++;
Interlocked.Increment(ref countCasModifyCalls);
return(value);
},
int.MaxValue);
}
},
numThreads,
iterations);
// assert
Thread.Sleep(10);
var result = cache.Get(key);
result.Should().NotBeNull();
Trace.TraceInformation("Counter increased to " + result.Counter + " cas calls needed " + countCasModifyCalls);
result.Counter.Should().Be(numThreads * numInnerIterations * iterations, "counter should be exactly the expected value");
countCasModifyCalls.Should().BeGreaterThan((int)result.Counter, "we expect many version collisions, so cas calls should be way higher then the count result");
}
}
public void Memcached_NoRaceCondition_WithCasButTooFiewRetries()
{
// arrange
using (var cache = CacheFactory.Build <RaceConditionTestElement>(settings =>
{
settings.WithUpdateMode(CacheUpdateMode.Up)
.WithMemcachedCacheHandle(Configuration)
.WithExpiration(ExpirationMode.Absolute, TimeSpan.FromHours(10));
}))
{
cache.Remove("myCounter");
cache.Add("myCounter", new RaceConditionTestElement()
{
Counter = 0
});
int numThreads = 5;
int iterations = 10;
int numInnerIterations = 10;
int countCasModifyCalls = 0;
int retries = 0;
// act
ThreadTestHelper.Run(
() =>
{
for (int i = 0; i < numInnerIterations; i++)
{
RaceConditionTestElement newValue;
cache.TryUpdate(
"myCounter",
(value) =>
{
value.Counter++;
Interlocked.Increment(ref countCasModifyCalls);
return(value);
},
retries,
out newValue);
}
},
numThreads,
iterations);
// assert
Thread.Sleep(10);
var result = cache.Get("myCounter");
result.Should().NotBeNull();
Trace.TraceInformation("Counter increased to " + result.Counter + " cas calls needed " + countCasModifyCalls);
result.Counter.Should().BeLessThan(
numThreads * numInnerIterations * iterations,
"counter should NOT be exactly the expected value");
countCasModifyCalls.Should().Be(
numThreads * numInnerIterations * iterations,
"with one try, we exactly one update call per iteration");
}
}
public void Thread_Update(ICacheManager <object> cache)
{
using (cache)
{
var key = Guid.NewGuid().ToString();
var handleInfo = string.Join("\nh: ", cache.CacheHandles.Select(p => p.Configuration.HandleName + ":" + p.GetType().Name));
cache.Remove(key);
cache.Add(key, new RaceConditionTestElement()
{
Counter = 0
});
int numThreads = 5;
int iterations = 10;
int numInnerIterations = 10;
int countCasModifyCalls = 0;
// act
ThreadTestHelper.Run(
() =>
{
for (int i = 0; i < numInnerIterations; i++)
{
cache.Update(key, (value) =>
{
var val = (RaceConditionTestElement)value;
val.Counter++;
Interlocked.Increment(ref countCasModifyCalls);
return(value);
});
}
},
numThreads,
iterations);
// assert
Thread.Sleep(10);
for (var i = 0; i < cache.CacheHandles.Count(); i++)
{
var handle = cache.CacheHandles.ElementAt(i);
var result = (RaceConditionTestElement)handle.Get(key);
if (i < cache.CacheHandles.Count() - 1)
{
// only the last one should have the item
result.Should().BeNull();
}
else
{
result.Should().NotBeNull(handleInfo + "\ncurrent: " + handle.Configuration.HandleName + ":" + handle.GetType().Name);
result.Counter.Should().Be(numThreads * numInnerIterations * iterations, handleInfo + "\ncounter should be exactly the expected value.");
countCasModifyCalls.Should().BeGreaterOrEqualTo((int)result.Counter, handleInfo + "\nexpecting no (if synced) or some version collisions.");
}
}
}
}
public void Memcached_NoRaceCondition_WithCasHandling_WithRegion()
{
// arrange
using (var cache = CacheFactory.Build <RaceConditionTestElement>(settings =>
{
settings.WithUpdateMode(CacheUpdateMode.Up)
.WithMemcachedCacheHandle(Configuration)
.WithExpiration(ExpirationMode.Absolute, TimeSpan.FromMinutes(10));
}))
{
var region = "region";
var key = "myKey";
cache.Remove(key, region);
cache.Add(key, new RaceConditionTestElement()
{
Counter = 0
}, region);
int numThreads = 5;
int iterations = 10;
int numInnerIterations = 10;
int countCasModifyCalls = 0;
// act
ThreadTestHelper.Run(
() =>
{
for (int i = 0; i < numInnerIterations; i++)
{
cache.Update(
key,
region,
(value) =>
{
value.Counter++;
Interlocked.Increment(ref countCasModifyCalls);
return(value);
},
500);
}
},
numThreads,
iterations);
// assert
Thread.Sleep(10);
var result = cache.Get(key, region);
result.Should().NotBeNull();
Trace.TraceInformation("Counter increased to " + result.Counter + " cas calls needed " + countCasModifyCalls);
result.Counter.Should().Be(numThreads * numInnerIterations * iterations, "counter should be exactly the expected value");
countCasModifyCalls.Should().BeGreaterThan((int)result.Counter, "we expect many version collisions, so cas calls should be way higher then the count result");
}
}
public void Memcached_NoRaceCondition_WithCasHandling()
{
// arrange
using (var cache = CacheFactory.Build <RaceConditionTestElement>(settings =>
{
settings.WithUpdateMode(CacheUpdateMode.Full)
.WithSystemRuntimeDefaultCacheHandle()
.WithExpiration(ExpirationMode.Absolute, TimeSpan.FromMilliseconds(1))
.And
.WithMemcachedCacheHandle("default")
.WithExpiration(ExpirationMode.Absolute, TimeSpan.FromSeconds(10));
}))
{
cache.Remove("myCounter");
cache.Add("myCounter", new RaceConditionTestElement()
{
Counter = 0
});
int numThreads = 5;
int iterations = 10;
int numInnerIterations = 10;
int countCasModifyCalls = 0;
// act
ThreadTestHelper.Run(
() =>
{
for (int i = 0; i < numInnerIterations; i++)
{
cache.Update(
"myCounter",
(value) =>
{
value.Counter++;
Interlocked.Increment(ref countCasModifyCalls);
return(value);
},
new UpdateItemConfig(50, VersionConflictHandling.EvictItemFromOtherCaches));
}
},
numThreads,
iterations);
// assert
Thread.Sleep(10);
var result = cache.Get("myCounter");
result.Should().NotBeNull();
Trace.WriteLine("Counter increased to " + result.Counter + " cas calls needed " + countCasModifyCalls);
result.Counter.Should().Be(numThreads * numInnerIterations * iterations, "counter should be exactly the expected value");
countCasModifyCalls.Should().BeGreaterThan((int)result.Counter, "we expect many version collisions, so cas calls should be way higher then the count result");
}
}
public void Redis_RaceCondition_WithoutUpdate()
{
using (var cache = CacheFactory.Build <RaceConditionTestElement>(settings =>
{
settings.WithUpdateMode(CacheUpdateMode.Full)
.WithJsonSerializer()
.WithRedisCacheHandle("default")
.WithExpiration(ExpirationMode.Absolute, TimeSpan.FromMinutes(20));
settings.WithRedisConfiguration("default", config =>
{
config.WithAllowAdmin()
.WithDatabase(8)
.WithEndpoint("127.0.0.1", 6379);
});
}))
{
var key = Guid.NewGuid().ToString();
cache.Add(key, new RaceConditionTestElement()
{
Counter = 0
});
int numThreads = 5;
int iterations = 10;
int numInnerIterations = 10;
// act
ThreadTestHelper.Run(
() =>
{
for (int i = 0; i < numInnerIterations; i++)
{
var val = cache.Get(key);
val.Should().NotBeNull();
val.Counter++;
cache.Put(key, val);
}
},
numThreads,
iterations);
// assert
Thread.Sleep(10);
var result = cache.Get(key);
result.Should().NotBeNull();
Trace.TraceInformation("Counter increased to " + result.Counter);
result.Counter.Should().NotBe(numThreads * numInnerIterations * iterations);
}
}
public void Memcached_RaceCondition_WithoutCasHandling()
{
// arrange
using (var cache = CacheFactory.Build <RaceConditionTestElement>(settings =>
{
settings.WithUpdateMode(CacheUpdateMode.Up)
.WithMemcachedCacheHandle(Configuration)
.WithExpiration(ExpirationMode.Absolute, TimeSpan.FromMinutes(20));
}))
{
cache.Remove("myCounter");
cache.Add("myCounter", new RaceConditionTestElement()
{
Counter = 0
});
int numThreads = 5;
int iterations = 10;
int numInnerIterations = 10;
// act
ThreadTestHelper.Run(
() =>
{
for (int i = 0; i < numInnerIterations; i++)
{
var val = cache.Get("myCounter");
val.Should().NotBeNull();
val.Counter++;
cache.Put("myCounter", val);
}
},
numThreads,
iterations);
// assert
Thread.Sleep(10);
var result = cache.Get("myCounter");
result.Should().NotBeNull();
Trace.TraceInformation("Counter increased to " + result.Counter);
result.Counter.Should().NotBe(numThreads * numInnerIterations * iterations);
}
}
public void CacheManager_Stats_Threaded <T>(T cache)
where T : ICacheManager <object>
{
var puts = cache.CacheHandles.Select(p => p.Stats.GetStatistic(CacheStatsCounterType.PutCalls));
var adds = cache.CacheHandles.Select(p => p.Stats.GetStatistic(CacheStatsCounterType.AddCalls));
var threads = 5;
var iterations = 10;
using (cache)
{
var key = Guid.NewGuid().ToString();
ThreadTestHelper.Run(
() =>
{
cache.Add(key, "hi");
cache.Put(key, "changed");
},
threads,
iterations);
}
puts.ShouldAllBeEquivalentTo(
Enumerable.Repeat(threads * iterations, cache.CacheHandles.Count()));
}
public void Thread_RandomAccess(ICacheManager <object> cache)
{
NotNull(cache, nameof(cache));
foreach (var handle in cache.CacheHandles)
{
Trace.TraceInformation("Using handle {0}", handle.GetType());
}
var blob = new byte[1024];
using (cache)
{
Action test = () =>
{
var hits = 0;
var misses = 0;
var tId = Thread.CurrentThread.ManagedThreadId;
try
{
for (var r = 0; r < 5; r++)
{
for (int i = 0; i < 5; i++)
{
string key = "key" + i;
object value = blob.Clone();
string region = "region" + r;
CacheItem <object> item = null;
if (r % 2 == 0)
{
item = new CacheItem <object>(key, value, ExpirationMode.Sliding, TimeSpan.FromMilliseconds(10));
}
else
{
item = new CacheItem <object>(key, region, value, ExpirationMode.Absolute, TimeSpan.FromMilliseconds(10));
}
cache.Put(item);
if (!cache.Add(item))
{
cache.Put(item);
}
var result = cache.Get(key);
if (result == null)
{
misses++;
}
else
{
hits++;
}
if (!cache.Remove(key))
{
misses++;
}
else
{
hits++;
}
Thread.Sleep(0);
}
}
}
catch (Exception ex)
{
Debug.WriteLine("{1} Error: {0}", ex.Message, tId);
throw;
}
Debug.WriteLine("Hits: {0}, Misses: {1}", hits, misses);
};
ThreadTestHelper.Run(test, 2, 1);
}
}