private Dictionary <string, double> FullGc(BasicFilesystemCache cache, string action = "FullGc")
{
Dictionary <string, double> statsFp = cache.CollectUnreferencedFingerprints(m_output).Success("{0}:CollectUnreferencedFingerprints\n{1}", action);
Dictionary <string, double> statsCas = cache.CollectUnreferencedCasItems(m_output).Success("{0}:CollectUnreferencedCasItems\n{1}", action);
foreach (var kv in statsCas)
{
statsFp.Add(kv.Key, kv.Value);
}
m_output.LogStats(statsFp);
return(statsFp);
}
public async Task TestCacheStats()
{
string testName = nameof(TestCacheStats);
ICache firstInvocation = await TestType.CreateCacheAsync(testName, true);
Guid originalGuid = firstInvocation.CacheGuid;
ICacheSession session = (await firstInvocation.CreateSessionAsync("firstSession")).Success();
PipDefinition[] pips =
{
new PipDefinition("PipA", pipSize: 4, hashIndex: 2),
new PipDefinition("PipB", pipSize: 5, hashIndex: 3),
new PipDefinition("PipC", pipSize: 5, hashIndex: 4),
// Note that this second "PipC" just has a different 3rd hash in the
// strong fingerprint but has the same weak fingerprint (and content)
// This is specifically to check on some other counter cases in the cache
new PipDefinition("PipC", pipSize: 5, hashIndex: 3)
};
await pips.BuildAsync(session);
(await session.CloseAsync()).Success();
var stats = await session.GetStatisticsAsync().SuccessAsync();
// We output the stats to the test harness such that we can debug failures
m_output.WriteLine("\nFirst Fake Build:");
m_output.LogStats(stats);
XAssert.AreEqual(4, stats[0].Statistics["AddOrGet_New_Count"]);
// Sum of the number of CAS entries in the 4 fingerprints. (4 + 5 + 5 + 5)
XAssert.AreEqual(19, stats[0].Statistics["AddOrGet_New_Number_Sum"]);
// Sum-squared of CAS entries in the 4 fingerprints (16 + 25 + 25 + 25)
XAssert.AreEqual(91, stats[0].Statistics["AddOrGet_New_Number_Sum2"]);
// Time should be non-zero (since we added some) [and sum-squared]
// NOTE: It seems some build machines have a slow clock (not high resolution)
// and are fast enough that no time passes when doing the test AddOrGet
// calls (even though they create a directory and create/write a file)
// So, to remove flaky, these are not checked as being non-zero but
// just that they exist. (Which does not actually test much, unfortunately)
// XAssert.AreNotEqual(0, stats[0].Statistics["AddOrGet_New_Time_Sum"]);
// XAssert.AreNotEqual(0, stats[0].Statistics["AddOrGet_New_Time_Sum2"]);
XAssert.IsTrue(stats[0].Statistics.ContainsKey("AddOrGet_New_Time_Sum"));
XAssert.IsTrue(stats[0].Statistics.ContainsKey("AddOrGet_New_Time_Sum2"));
// Only the first 3 pips have unique CAS content (4 + 5 + 5) and input lists (1 + 1 + 1)
// that makes for 17 unique new CAS entries added
XAssert.AreEqual(17, stats[0].Statistics["AddToCas_Stream_New_Count"]);
// ... and 5 + 1 (aka 6) that are duplicated content
XAssert.AreEqual(6, stats[0].Statistics["AddToCas_Stream_Dup_Count"]);
// Bytes of new content (arrived at by adding up the bytes in all of the cas files generated by the
// first 3 pips
XAssert.AreEqual(182, stats[0].Statistics["AddToCas_Stream_New_Bytes_Sum"]);
XAssert.AreEqual(3738, stats[0].Statistics["AddToCas_Stream_New_Bytes_Sum2"]);
// And 65 bytes of duplicate
XAssert.AreEqual(65, stats[0].Statistics["AddToCas_Stream_Dup_Bytes_Sum"]);
XAssert.AreEqual(1405, stats[0].Statistics["AddToCas_Stream_Dup_Bytes_Sum2"]);
// And that at close time we had 4 fingerprints in our session
XAssert.AreEqual(1, stats[0].Statistics["Close_Count"]);
XAssert.AreEqual(4, stats[0].Statistics["Close_Fingerprints"]);
// There should be no disconnects
XAssert.AreEqual(0, stats[0].Statistics["CacheDisconnected"]);
// Now to check for the second session (all cache hits)
session = (await firstInvocation.CreateSessionAsync("secondSession")).Success();
// This time we will also read all of the CAS items and get the total size
// of all of the data we read (and there will be some duplicates)
double totalCas = 0;
double totalCasSize = 0;
foreach (var record in await pips.BuildAsync(session))
{
totalCas++;
totalCasSize += await PinAndGetStreamSize(session, record.StrongFingerprint.CasElement);
foreach (var casItem in record.CasEntries)
{
totalCas++;
totalCasSize += await PinAndGetStreamSize(session, casItem);
}
}
// Silly, but we do this again, just to get some bigger counts
// and to do file based produce (different counts) - this should
// then match the counts above.
double totalCasFileSize = 0;
foreach (var record in await pips.BuildAsync(session))
{
totalCasFileSize += await GetAsFile(session, record.StrongFingerprint.CasElement);
foreach (var casItem in record.CasEntries)
{
totalCasFileSize += await GetAsFile(session, casItem);
}
}
(await session.CloseAsync()).Success();
stats = await session.GetStatisticsAsync().SuccessAsync();
// We output the stats to the test harness such that we can debug failures
m_output.WriteLine("\nSecond Fake Build:");
m_output.LogStats(stats);
// The files produced and the streams produced should match
XAssert.AreEqual(totalCasSize, totalCasFileSize, "Files and Streams should match in size!");
// And that at close time we had 4 fingerprints in our session
XAssert.AreEqual(1, stats[0].Statistics["Close_Count"]);
XAssert.AreEqual(4, stats[0].Statistics["Close_Fingerprints"]);
XAssert.AreEqual(0, stats[0].Statistics["AddToCas_Stream_New_Count"]);
XAssert.AreEqual(0, stats[0].Statistics["AddToCas_Stream_Dup_Count"]);
// We have 8 pips and enumerate the fingerprints 8 times
// from weak but we know that there are 2 of them that share so...
XAssert.AreEqual(8, stats[0].Statistics["EnumerateStrongFingerprints_Count"]);
XAssert.AreEqual(10, stats[0].Statistics["EnumerateStrongFingerprints_Number_Sum"]);
XAssert.AreEqual(14, stats[0].Statistics["EnumerateStrongFingerprints_Number_Sum2"]);
// And we then get the entry from the cache (hashes will match)
XAssert.AreEqual(8, stats[0].Statistics["GetCacheEntry_Hit_Count"]);
// There are 17 unique CAS entries and 6 total duplicates
XAssert.AreEqual(17, stats[0].Statistics["PinToCas_Hit_Count"]);
XAssert.AreEqual(6, stats[0].Statistics["PinToCas_Dup_Count"]);
// But we blindly get each and every one of them (all 23) and their total size
XAssert.AreEqual(23, stats[0].Statistics["GetStream_Hit_Count"]);
XAssert.AreEqual(247, stats[0].Statistics["GetStream_Hit_Bytes_Sum"]);
XAssert.AreEqual(5143, stats[0].Statistics["GetStream_Hit_Bytes_Sum2"]);
// But we blindly get each and every one of them (all 23) and their total size (as files)
XAssert.AreEqual(247, stats[0].Statistics["ProduceFile_Hit_Bytes_Sum"]);
XAssert.AreEqual(5143, stats[0].Statistics["ProduceFile_Hit_Bytes_Sum2"]);
XAssert.AreEqual(23, stats[0].Statistics["ProduceFile_Hit_Count"]);
// Validate that these are the values we observed
XAssert.AreEqual(totalCas, stats[0].Statistics["GetStream_Hit_Count"]);
XAssert.AreEqual(totalCasSize, stats[0].Statistics["GetStream_Hit_Bytes_Sum"]);
// There should be no disconnects
XAssert.AreEqual(0, stats[0].Statistics["CacheDisconnected"]);
await TestType.ShutdownCacheAsync(firstInvocation, testName);
}
