[英]VS2012 OutOfMemoryException vs. VS2010 working w/o Exception
我在Visual Studio 2010中有一個正常運行的項目。 我將該項目轉移到VS2012,並且出現OutOfMemoryException
。 我知道為什么會遇到例外,因為我在2010年遇到了同樣的情況。發生這種情況的原因是,該應用程序運行的是一種遺傳算法,該算法會產生多個后代,每個后代都由一個大對象組成(int數組[500,200, 7])。 我減少了每個交叉產生的后代數量,並且能夠擺脫異常,即使它是局部變量,我也必須添加offspring.clear()
。 在VS2012中,似乎垃圾回收永遠不會拾取應該釋放的offspring
數組。 我什至在應該發生的地方添加了GC.Collect()
。 我很困惑,為什么使用相同的代碼,該程序只是繼續消耗VS2012中的內存。
/// <summary>
/// Runs the genetic algorithm
/// </summary>
public void RunAlgorithm()
{
for (int i = 0; i < progeny; i++)
schedules.Add(new Schedule(true));
schedules.Sort();
best = schedules[0];
while (best.unscheduled.Count > 15)
{
List<Scheduling.Schedule> offspring = GetOffspring();
offspring.Sort();
if (offspring[0].unscheduled.Count < best.unscheduled.Count)
best = offspring[0];
schedules.Clear();
for (int s = 0; s < progeny; s++)
schedules.Add(offspring[s]);
offspring.Clear();
}
}
public List<Scheduling.Schedule> GetOffspring()
{
List<Scheduling.Schedule> offspring = new List<Schedule>();
int parentSize = (int)(schedules.Count * poolSizePcnt);
for (int p1 = 0; p1 < parentSize; p1++)
{
for (int p2 = p1 + 1; p2 < parentSize; p2++)
{
Schedule[] children = Breed(schedules[p1], schedules[p2]);
offspring.Add(children[0]);
offspring.Add(children[1]);
}
}
return offspring;
}
/// <summary>
/// Returns an array of 2 children from the breeding of two parents with a single crossover point and potential mutation on the alleles.
/// </summary>
/// <param name="p1">Parent One</param>
/// <param name="p2">Parent two</param>
/// <returns></returns>
public Schedule[] Breed(Schedule p1, Schedule p2)
{
Schedule c1 = new Schedule();
c1.schedule = new int[p1.schedule.GetUpperBound(0) + 1, p1.schedule.GetUpperBound(1) + 1, p1.schedule.GetUpperBound(2) + 1];
Schedule c2 = new Schedule();
c2.schedule = new int[p1.schedule.GetUpperBound(0) + 1, p1.schedule.GetUpperBound(1) + 1, p1.schedule.GetUpperBound(2) + 1];
//randomized crossover point from min to max
int crssPnt = (int)(Schedule.rand.Next(min, max) / (10.0) * Schedule.courseIDdict.Count);
for (int c = 0; c < crssPnt; c++)
{
int cID = Schedule.courseIDdict[c].id;
//TODO: if cID is contained within a list, prevent from certain moves, e.g. to D
for (int i = 1; i <= 6; i++)
{
int random = Schedule.rand.Next(0, mutationRate);
if (p1.schedule[0, cID, i] >= 1)
{
if (rand1 == random)//introduce mutation if the random number is hit
c1.schedule[0, cID, Schedule.rand.Next(1, 7)] = 1;
else
c1.schedule[0, cID, i] = 1;
}
if (p2.schedule[0, cID, i] >= 1)
{
if (rand2 == random)//introduce mutation if the random number is hit
c2.schedule[0, cID, Schedule.rand.Next(1, 7)] = 1;
else
c2.schedule[0, cID, i] = 1;
}
}
}
for (int c = crssPnt; c < Schedule.courseIDdict.Count; c++)
{
int cID = Schedule.courseIDdict[c].id;
for (int i = 1; i <= 6; i++)
{
int random = Schedule.rand.Next(0, mutationRate);
if (p1.schedule[0, cID, i] >= 1)
{
if (rand2 == random)//introduce mutation if the random number is hit
c2.schedule[0, cID, Schedule.rand.Next(1, 7)] = 1;
else
c2.schedule[0, cID, i] = 1;
}
if (p2.schedule[0, cID, i] >= 1)
{
if (rand1 == random)//introduce mutation if the random number is hit
c1.schedule[0, cID, Schedule.rand.Next(1, 7)] = 1;
else
c1.schedule[0, cID, i] = 1;
}
}
}
c1.AddStudentsToClasses();
c2.AddStudentsToClasses();
return new[] { c1, c2 };
}
VS中有一個(任何CPU)配置,然后有一個構建目標下拉列表(2012年)中的Project-> Properties-> Buid選項卡。 通常,“構建目標”的時間將設置為x86,並且當仍有大量可用內存時,您會看到拋出“內存不足”異常。 例如,您可以設置任何cpu配置,並且仍然可以通過build target選項為x86構建。 當您使用2GB的RAM時,這將導致發生內存不足異常。
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