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//
// DebuggerStatistics.cs
//
// Author:
// Jeffrey Stedfast <jestedfa@microsoft.com>
//
// Copyright (c) 2019 Microsoft Corp.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
using System;
using System.Diagnostics;
using System.Collections.Generic;
namespace Mono.Debugging.Client
{
public class DebuggerStatistics
{
static readonly int[] UpperTimeLimits = { 10, 50, 100, 250, 500, 1000, 1500, 2000, 5000, 10000 };
readonly int[] buckets = new int[UpperTimeLimits.Length + 1];
readonly object mutex = new object ();
TimeSpan minTime = TimeSpan.MaxValue;
TimeSpan maxTime, totalTime;
public double MaxTime {
get { return maxTime.TotalMilliseconds; }
}
public double MinTime {
get { return minTime.TotalMilliseconds; }
}
public double AverageTime {
get {
if (TimingsCount > 0)
return totalTime.TotalMilliseconds / TimingsCount;
return 0;
}
}
public int TimingsCount { get; private set; }
public int FailureCount { get; private set; }
public DebuggerTimer StartTimer ()
{
var timer = new DebuggerTimer (this);
timer.Start ();
return timer;
}
int GetBucketIndex (TimeSpan duration)
{
var ms = (long) duration.TotalMilliseconds;
for (var bucket = 0; bucket < UpperTimeLimits.Length; bucket++) {
if (ms <= UpperTimeLimits[bucket])
return bucket;
}
return buckets.Length - 1;
}
public void AddTime (TimeSpan duration)
{
lock (mutex) {
if (duration > maxTime)
maxTime = duration;
if (duration < minTime)
minTime = duration;
buckets[GetBucketIndex (duration)]++;
totalTime += duration;
TimingsCount++;
}
}
public void IncrementFailureCount ()
{
lock (mutex) {
FailureCount++;
}
}
public void Serialize (Dictionary<string, object> metadata)
{
metadata["AverageDuration"] = AverageTime;
metadata["MaximumDuration"] = MaxTime;
metadata["MinimumDuration"] = MinTime;
metadata["FailureCount"] = FailureCount;
metadata["SuccessCount"] = TimingsCount;
for (int i = 0; i < buckets.Length; i++)
metadata[$"Bucket{i}"] = buckets[i];
}
}
public class DebuggerTimer : IDisposable
{
readonly DebuggerStatistics stats;
readonly Stopwatch stopwatch;
public DebuggerTimer (DebuggerStatistics stats)
{
stopwatch = new Stopwatch ();
this.stats = stats;
}
/// <summary>
/// Indicates if the debugger operation was successful. If this is false the
/// timing will not be reported and a failure will be indicated.
/// </summary>
public bool Success { get; set; }
public TimeSpan Elapsed {
get { return stopwatch.Elapsed; }
}
public void Start ()
{
stopwatch.Start ();
}
public void Stop (bool success)
{
stopwatch.Stop ();
Success = success;
if (stats == null)
return;
if (success)
stats.AddTime (stopwatch.Elapsed);
else
stats.IncrementFailureCount ();
}
public void Stop (ObjectValue val)
{
stopwatch.Stop ();
if (stats == null)
return;
if (val.IsEvaluating || val.IsEvaluatingGroup) {
// Do not capture timing - evaluation not finished.
} else if (val.IsError || val.IsImplicitNotSupported || val.IsNotSupported || val.IsUnknown) {
stats.IncrementFailureCount ();
} else {
// Success
stats.AddTime (stopwatch.Elapsed);
}
}
public void Dispose ()
{
if (stopwatch.IsRunning) {
stopwatch.Stop ();
if (stats == null)
return;
if (Success)
stats.AddTime (stopwatch.Elapsed);
else
stats.IncrementFailureCount ();
}
}
}
}
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