public void TestJetThreadstatsAddition()
{
var t1 = new JET_THREADSTATS
{
cPageReferenced = 1,
cPageRead = 2,
cPagePreread = 3,
cPageDirtied = 4,
cPageRedirtied = 5,
cLogRecord = 6,
cbLogRecord = 7,
};
var t2 = new JET_THREADSTATS
{
cPageReferenced = 8,
cPageRead = 9,
cPagePreread = 10,
cPageDirtied = 11,
cPageRedirtied = 12,
cLogRecord = 13,
cbLogRecord = 14,
};
JET_THREADSTATS sum = t1 + t2;
Assert.AreEqual(9, sum.cPageReferenced);
Assert.AreEqual(11, sum.cPageRead);
Assert.AreEqual(13, sum.cPagePreread);
Assert.AreEqual(15, sum.cPageDirtied);
Assert.AreEqual(17, sum.cPageRedirtied);
Assert.AreEqual(19, sum.cLogRecord);
Assert.AreEqual(21, sum.cbLogRecord);
Assert.AreEqual(sum, JET_THREADSTATS.Add(t1, t2));
}
/// <summary>
/// Stops time interval measurement and resets the thread statistics.
/// </summary>
public void Reset()
{
this.stopwatch = null;
this.ThreadStats = new JET_THREADSTATS();
this.Elapsed = TimeSpan.Zero;
this.IsRunning = false;
}
public void Setup()
{
this.native = new NATIVE_THREADSTATS
{
cPageReferenced = 1,
cPageRead = 2,
cPagePreread = 3,
cPageDirtied = 4,
cPageRedirtied = 5,
cLogRecord = 6,
cbLogRecord = 7,
};
this.managed = new JET_THREADSTATS();
this.managed.SetFromNativeThreadstats(this.native);
}
public static unsafe extern int JetGetThreadStats(JET_THREADSTATS* pvResult, uint cbMax);
public void TestJetThreadstatsSubtraction()
{
var t1 = new JET_THREADSTATS
{
cPageReferenced = 20,
cPageRead = 19,
cPagePreread = 18,
cPageDirtied = 17,
cPageRedirtied = 16,
cLogRecord = 15,
cbLogRecord = 14,
};
var t2 = new JET_THREADSTATS
{
cPageReferenced = 8,
cPageRead = 9,
cPagePreread = 10,
cPageDirtied = 11,
cPageRedirtied = 12,
cLogRecord = 13,
cbLogRecord = 14,
};
JET_THREADSTATS difference = t1 - t2;
Assert.AreEqual(12, difference.cPageReferenced);
Assert.AreEqual(10, difference.cPageRead);
Assert.AreEqual(8, difference.cPagePreread);
Assert.AreEqual(6, difference.cPageDirtied);
Assert.AreEqual(4, difference.cPageRedirtied);
Assert.AreEqual(2, difference.cLogRecord);
Assert.AreEqual(0, difference.cbLogRecord);
Assert.AreEqual(difference, JET_THREADSTATS.Subtract(t1, t2));
}
public void TestJetThreadstatsToStringPerf()
{
var t = new JET_THREADSTATS
{
cPageReferenced = 10,
cPageRead = 5,
cPagePreread = 4,
cPageDirtied = 3,
cPageRedirtied = 2,
cLogRecord = 1,
cbLogRecord = 0,
};
// Call the method once to make sure it is compiled.
string ignored = t.ToString();
const int N = 100000;
Stopwatch s = Stopwatch.StartNew();
for (int i = 0; i < N; ++i)
{
ignored = t.ToString();
}
s.Stop();
double ms = Math.Max(1, s.ElapsedMilliseconds);
Console.WriteLine("{0} calls in {1} ({2} ms/call)", N, s.Elapsed, ms / N);
}
public void TestJetThreadstatsToString()
{
var t = new JET_THREADSTATS
{
cPageReferenced = 10,
cPageRead = 2,
cPagePreread = 3,
cPageDirtied = 4,
cPageRedirtied = 5,
cLogRecord = 6,
cbLogRecord = 7,
};
const string Expected = "10 page references, 2 pages read, 3 pages preread, 4 pages dirtied, 5 pages redirtied, 6 log records, 7 bytes logged";
Assert.AreEqual(Expected, t.ToString());
}
public void TestJetThreadstatsToStringZero()
{
var t = new JET_THREADSTATS
{
cPageReferenced = 0,
cPageRead = 0,
cPagePreread = 0,
cPageDirtied = 0,
cPageRedirtied = 0,
cLogRecord = 0,
cbLogRecord = 0,
};
const string Expected = "0 page references, 0 pages read, 0 pages preread, 0 pages dirtied, 0 pages redirtied, 0 log records, 0 bytes logged";
Assert.AreEqual(Expected, t.ToString());
}
public void TestJetThreadstatsToStringSingular()
{
var t = new JET_THREADSTATS
{
cPageReferenced = 1,
cPageRead = 1,
cPagePreread = 1,
cPageDirtied = 1,
cPageRedirtied = 1,
cLogRecord = 1,
cbLogRecord = 1,
};
const string Expected = "1 page reference, 1 page read, 1 page preread, 1 page dirtied, 1 page redirtied, 1 log record, 1 byte logged";
Assert.AreEqual(Expected, t.ToString());
}
/// <summary>
/// Stops measuring ESENT work.
/// </summary>
public void Stop()
{
if (this.IsRunning)
{
this.IsRunning = false;
this.stopwatch.Stop();
this.Elapsed = this.stopwatch.Elapsed;
if (EsentVersion.SupportsVistaFeatures)
{
JET_THREADSTATS statsAtEnd;
VistaApi.JetGetThreadStats(out statsAtEnd);
this.ThreadStats = statsAtEnd - this.statsAtStart;
}
}
}
