静态方法在通过多个线程访问时变慢
本文关键字：访问 线程 静态方法 | 更新日期: 2023-09-27 18:36:30
我遇到这样一种情况：我的 .Net 4 C# 应用程序正在访问静态类中的静态方法，使该方法的执行速度比单个线程访问时慢。例如，如果该方法由单个线程调用，则大约需要 1.5 分钟才能完成，而当由 2 个线程调用时，则需要 4 分钟才能完成。
任何提高性能的想法/建议/最佳实践都受到高度赞赏。提前感谢您的回复。
更多信息：这是一个应用程序，它之前使用线程池在某些部分执行线程。我引入了并行任务。因此，它是TPL和旧线程池的混合。例如，假设一个并行任务可以有多个线程。该机器有 24 个 CPU 内核和 64GB RAM。我运行了 2 个进程，这些进程将拆分为 5 个线程，每个线程总共多达 10 个线程。在此期间，过程变慢了。我在这里粘贴代码供那些想要检查它并提供建议的人使用。抱歉粘贴长代码。该代码可能没有像几年前编码的那样具有所有当前的最新功能。再次感谢。
public static class Property11
{
/// <summary>
/// Splits agg rows to separate commands where the reference parameters are included for each command.
/// </summary>
/// <param name="worksheetID">The current worksheet ID.</param>
/// <param name="propertyID">The current property ID.</param>
/// <param name="ccrFormObj">The ccr form object.</param>
public static void SplitAggregateIncludeReferenceParameterCCRToDTH(PropertyCall propertyCallObj)
{
string worksheetID = propertyCallObj.WorksheetID;
int propertyID = propertyCallObj.PropertyID;
IDClass nextIDObj = propertyCallObj.NextIDObj;
CCRFormStructure ccrFormObj = propertyCallObj.CCRFormObj;
List<CCRFormStructure> ccrFormObjsToAdd = propertyCallObj.CCRFormObjToAddList;
DateTime dtProp = DateTime.Now;
System.Diagnostics.Debug.Print("Start time property = " + propertyCallObj.PropertyID + ", worksheet = " + propertyCallObj.WorksheetID + ": " + dtProp.ToString());
try
{
// Get all rows for worksheet
List<WorksheetRow> rowListForWorksheet =
(from wr in ccrFormObj.myWorksheetRowList
where wr.WorksheetID == worksheetID
select wr).ToList();
// Get all parameters for worksheet
List<WorksheetRowParameter> rowParameterListForWorksheet =
(from wrp in ccrFormObj.myWorksheetRowParameterList
join wr in rowListForWorksheet
on wrp.WorksheetRowID equals wr.ID
select wrp).ToList();
// Get all agg rows in worksheet
List<AggRow> aggRowsInWorksheet =
(from ar in ccrFormObj.myAggRowList
join wsrp in rowParameterListForWorksheet
on ar.WorksheetRowParameterID equals wsrp.ID
select ar).ToList();
// Get all agg row parameters in worksheet
List<AggRowParameter> aggParametersInWorksheet =
(from arp in ccrFormObj.myAggRowParameterList
join ar in aggRowsInWorksheet
on arp.AggRowID equals ar.ID
select arp).ToList();
// Get all command mappings for worksheet
List<CommandMappingObj> commandMappingListForWorksheet =
(from cm in ccrFormObj.commandMappingList
join wr in rowListForWorksheet
on cm.WorksheetRowID equals wr.ID
select cm).ToList();
// Get all parameter mappings for worksheet
List<ParameterMappingObj> parameterMappingListForWorksheet =
(from pm in ccrFormObj.parameterMappingList
join cm in commandMappingListForWorksheet
on pm.CommandMappingObjID equals cm.ID
select pm).ToList();
// Get all property objects for worksheet
List<ParameterPropertyObj> propertyList =
(from ppo in ccrFormObj.parameterPropertiesList
where ppo.ID == propertyID && ppo.WorksheetID == worksheetID
select ppo).ToList();
//List<WorksheetRow> rowsToRemove = new List<WorksheetRow>();
WorksheetRowParameter currentWorksheetRowParameter;
AggRow currentAggRow;
AggRowParameter currentAggRowParameter;
AggRow currentSteeringAggRow;
AggRowParameter currentSteeringAggRowParameter;
int newIDIndex = 0;
List<string> worksheetRowsWithoutTooLongCommandRows = new List<string>();
WorksheetRow newWSR = new WorksheetRow();
CommandMappingObj newCMO = new CommandMappingObj();
WorksheetRow newWSRForOrigRow = new WorksheetRow();
CommandMappingObj newChangeCMO = new CommandMappingObj();
List<string> steeringParameters;
IEnumerable<WorksheetRowParameter> parameterListForRow;
IEnumerable<WorksheetRowParameter> currentSteeringParameters;
string newCMOID;
ParameterMappingObj newPMO;
WorksheetRowParameter newWSRP;
string newWSRID;
string newID;
IEnumerable<string> commandsWithPropertyParameterForRow;
Hashtable htPropertyParamAndSteeringParameters = new Hashtable();
List<string> steeringParametersForProperty;
WorksheetRowParameter currentWorksheetRowPropertyParameter;
bool removeOrigRow = false;
bool firstRowForAggCreated = false;
List<WorksheetRowParameter> propParamListForFirstCreatedRow = new List<WorksheetRowParameter>();
List<string> propParamUsedAsSteeringList = new List<string>();
foreach (ParameterPropertyObj propertyParameter in propertyList)
{
if (propertyParameter.SecondaryPropertyInfo != null && propertyParameter.SecondaryPropertyInfo != "")
{
steeringParameters = propertyParameter.SecondaryPropertyInfo.Split(",".ToCharArray()).ToList();
}
else
{
steeringParameters = new List<string>();
}
htPropertyParamAndSteeringParameters.Add(propertyParameter.Parameter, steeringParameters);
}
var aggListForRow =
from ar in aggRowsInWorksheet
join arp in aggParametersInWorksheet
on ar.ID equals arp.AggRowID
select new
{
AggRow = ar,
AggRowParameter = arp
};
var worksheetRowsWithRepParam =
from wrp in rowParameterListForWorksheet
where htPropertyParamAndSteeringParameters.Contains(wrp.Parameter)
join al in aggListForRow
on wrp.ID equals al.AggRow.WorksheetRowParameterID
into aggList
where aggList.Count() > 0
select new
{
WorksheetRowParameter = wrp,
AggList = aggList
};
foreach (WorksheetRow worksheetRow in rowListForWorksheet.ToList())
{
var worksheetRowWithRepParam =
worksheetRowsWithRepParam.Where(wrp => wrp.WorksheetRowParameter.WorksheetRowID == worksheetRow.ID);
if (worksheetRowWithRepParam.Count() > 0)
{
firstRowForAggCreated = false;
var currentMappingList =
from cmo in commandMappingListForWorksheet
where cmo.WorksheetRowID == worksheetRow.ID
join pmo in parameterMappingListForWorksheet
on cmo.ID equals pmo.CommandMappingObjID
into parameterMappingList
select new
{
CommandMapping = cmo,
ParameterMappingList = parameterMappingList
};
IEnumerable<ParameterPropertyObj> sortedPropertyList =
from wrwrp in worksheetRowWithRepParam
join ppo in propertyList
on wrwrp.WorksheetRowParameter.Parameter equals ppo.Parameter
orderby wrwrp.AggList.Count() descending
select ppo;
propParamUsedAsSteeringList.Clear();
foreach (ParameterPropertyObj ppo in sortedPropertyList)
{
if (!propParamUsedAsSteeringList.Contains(ppo.Parameter))
{
var currentWorksheetRowsWithRepParam =
worksheetRowWithRepParam.Where(p => p.WorksheetRowParameter.Parameter == ppo.Parameter);
if (currentWorksheetRowsWithRepParam.Count() == 0)
{
continue;
}
var currentWorksheetRowWithRepParam = currentWorksheetRowsWithRepParam.ElementAt(0);
var currentAggList = currentWorksheetRowWithRepParam.AggList;
if (!firstRowForAggCreated)
{
currentWorksheetRowPropertyParameter = currentWorksheetRowWithRepParam.WorksheetRowParameter;
}
else
{
currentWorksheetRowPropertyParameter = propParamListForFirstCreatedRow.Where(p => p.Parameter == ppo.Parameter).ElementAt(0);
}
if (currentAggList.Count() > 1)
{
removeOrigRow = true;
steeringParametersForProperty = (List<string>)htPropertyParamAndSteeringParameters[ppo.Parameter];
currentSteeringParameters =
from wrp in rowParameterListForWorksheet
where wrp.WorksheetRowID == worksheetRow.ID
&& steeringParametersForProperty.Contains(wrp.Parameter)
select wrp;
commandsWithPropertyParameterForRow =
from cml in currentMappingList
where cml.ParameterMappingList.Count(pmo => pmo.Name == ppo.Parameter) > 0
select cml.CommandMapping.Name;
propParamUsedAsSteeringList.AddRange(
from sp in sortedPropertyList
where sp.Parameter != ppo.Parameter
join csp in currentSteeringParameters
on sp.Parameter equals csp.Parameter
select csp.Parameter);
// CREATE NEW WORKSHEET ROWS FOR EACH BUT THE FIRST AGG ROW PARAMETER
for (int i = 0; i < currentAggList.Count(); i++)
{
currentAggRow = currentAggList.ElementAt(i).AggRow;
currentAggRowParameter = currentAggList.ElementAt(i).AggRowParameter;
if (i == 0)
{
currentWorksheetRowPropertyParameter.Value = currentAggRowParameter.Value;
if (!firstRowForAggCreated)
{
propParamListForFirstCreatedRow.Clear();
newWSRID = newIDIndex.ToString().PadLeft(3, '0');
newID = newWSRID;
if (!worksheetRow.ID.Contains(','))
{
newID = "," + newWSRID;
}
newWSRForOrigRow = new WorksheetRow
{
ID = worksheetRow.ID + newID,
OriginalWorksheetRowID = worksheetRow.OriginalWorksheetRowID,
WorksheetID = worksheetRow.WorksheetID
};
ccrFormObj.myWorksheetRowList.Add(newWSRForOrigRow);
parameterListForRow =
from wrp in rowParameterListForWorksheet
where wrp.WorksheetRowID == worksheetRow.ID
select wrp;
foreach (WorksheetRowParameter currentParameter in parameterListForRow)
{
newID = "";
if ((currentParameter.ID != null) && (!currentParameter.ID.Contains(',')))
{
newID = ",";
}
newID += newIDIndex.ToString().PadLeft(3, '0');
newWSRP = new WorksheetRowParameter
{
ID = currentParameter.ID + newID,
OriginalParameterID = currentParameter.OriginalParameterID,
WorksheetRowID = newWSRForOrigRow.ID,
Parameter = currentParameter.Parameter,
Value = currentParameter.Value,
Disabled = currentParameter.Disabled
};
if (htPropertyParamAndSteeringParameters.Contains(newWSRP.Parameter)
&& newWSRP.Parameter != ppo.Parameter)
{
// TODO: IF AGG, TAKE AGG POS VALUE
var steeringParamAggList =
from wrwrp in worksheetRowWithRepParam
where wrwrp.WorksheetRowParameter.Parameter == newWSRP.Parameter
select wrwrp.AggList;
if (steeringParamAggList.Count() > 0)
{
if (steeringParamAggList.ElementAt(0).Count() > i)
{
currentSteeringAggRow = steeringParamAggList.ElementAt(0).ElementAt(i).AggRow;
currentSteeringAggRowParameter = steeringParamAggList.ElementAt(0).ElementAt(i).AggRowParameter;
newWSRP.Value = currentSteeringAggRowParameter.Value;
ccrFormObj.myAggRowParameterList.Remove(currentSteeringAggRowParameter);
ccrFormObj.myAggRowList.Remove(currentSteeringAggRow);
ccrFormObj.myWorksheetRowParameterList.Add(newWSRP);
}
}
else
{
ccrFormObj.myWorksheetRowParameterList.Add(newWSRP);
}
propParamListForFirstCreatedRow.Add(newWSRP);
}
else
{
ccrFormObj.myWorksheetRowParameterList.Add(newWSRP);
}
}
foreach (var currentMapping in currentMappingList)
{
// Re-point original command mapping to new row
newCMOID = newIDIndex.ToString().PadLeft(3, '0');
if (!currentMapping.CommandMapping.ID.Contains(','))
{
newID = "," + newCMOID;
}
// Create new command mapping object
newCMO = new CommandMappingObj
{
ID = currentMapping.CommandMapping.ID + newID,
Name = currentMapping.CommandMapping.Name,
WorksheetRowID = newWSRForOrigRow.ID
};
ccrFormObj.commandMappingList.Add(newCMO);
foreach (ParameterMappingObj pmo in currentMapping.ParameterMappingList)
{
newPMO = new ParameterMappingObj
{
Name = pmo.Name,
CommandMappingObjID = newCMO.ID
};
ccrFormObj.parameterMappingList.Add(newPMO);
}
}
firstRowForAggCreated = true;
}
}
else
{
newWSRID = newIDIndex.ToString().PadLeft(3, '0');
newID = newWSRID;
if (!worksheetRow.ID.Contains(','))
{
newID = "," + newWSRID;
}
newWSR = new WorksheetRow
{
ID = worksheetRow.ID + newID,
OriginalWorksheetRowID = worksheetRow.OriginalWorksheetRowID,
WorksheetID = worksheetRow.WorksheetID
};
ccrFormObj.myWorksheetRowList.Add(newWSR);
foreach (WorksheetRowParameter currentSteeringParameter in currentSteeringParameters)
{
newID = "";
if ((currentSteeringParameter.ID != null) && (!currentSteeringParameter.ID.Contains(',')))
{
newID = ",";
}
newID += newIDIndex.ToString().PadLeft(3, '0');
newWSRP = new WorksheetRowParameter
{
ID = currentSteeringParameter.ID + newID,
OriginalParameterID = currentSteeringParameter.OriginalParameterID,
WorksheetRowID = newWSR.ID,
Parameter = currentSteeringParameter.Parameter,
Value = currentSteeringParameter.Value,
Disabled = currentSteeringParameter.Disabled
};
var steeringParamAggList =
from wrwrp in worksheetRowWithRepParam
where wrwrp.WorksheetRowParameter.Parameter == newWSRP.Parameter
select wrwrp.AggList;
if (steeringParamAggList.Count() > 0)
{
if (steeringParamAggList.ElementAt(0).Count() > i)
{
currentSteeringAggRow = steeringParamAggList.ElementAt(0).ElementAt(i).AggRow;
currentSteeringAggRowParameter = steeringParamAggList.ElementAt(0).ElementAt(i).AggRowParameter;
newWSRP.Value = currentSteeringAggRowParameter.Value;
ccrFormObj.myAggRowParameterList.Remove(currentSteeringAggRowParameter);
ccrFormObj.myAggRowList.Remove(currentSteeringAggRow);
ccrFormObj.myWorksheetRowParameterList.Add(newWSRP);
}
}
else
{
ccrFormObj.myWorksheetRowParameterList.Add(newWSRP);
}
}
// Add rep param
newID = "";
if ((currentWorksheetRowPropertyParameter.ID != null) && (!currentWorksheetRowPropertyParameter.ID.Contains(',')))
{
newID = ",";
}
newID += newIDIndex.ToString().PadLeft(3, '0');
newWSRP = new WorksheetRowParameter
{
ID = currentWorksheetRowPropertyParameter.ID + newID,
OriginalParameterID = currentWorksheetRowPropertyParameter.OriginalParameterID,
WorksheetRowID = newWSR.ID,
Parameter = currentWorksheetRowPropertyParameter.Parameter,
Value = currentAggRowParameter.Value,
Disabled = currentWorksheetRowPropertyParameter.Disabled
};
ccrFormObj.myWorksheetRowParameterList.Add(newWSRP);
foreach (var currentMapping in currentMappingList)
{
if (commandsWithPropertyParameterForRow.Contains(currentMapping.CommandMapping.Name))
{
newCMOID = newIDIndex.ToString().PadLeft(3, '0');
if (!currentMapping.CommandMapping.ID.Contains(','))
{
newID = "," + newCMOID;
}
// Create new command mapping object
newCMO = new CommandMappingObj
{
ID = currentMapping.CommandMapping.ID + newID,
Name = currentMapping.CommandMapping.Name,
WorksheetRowID = newWSR.ID
};
ccrFormObj.commandMappingList.Add(newCMO);
foreach (ParameterMappingObj pmo in currentMapping.ParameterMappingList)
{
if ((pmo.Name == ppo.Parameter) || (currentSteeringParameters.Count(p => p.Parameter == pmo.Name) > 0))
{
newPMO = new ParameterMappingObj
{
Name = pmo.Name,
CommandMappingObjID = newCMO.ID
};
ccrFormObj.parameterMappingList.Add(newPMO);
}
}
}
}
}
newIDIndex++;
ccrFormObj.myAggRowParameterList.Remove(currentAggRowParameter);
ccrFormObj.myAggRowList.Remove(currentAggRow);
}
}
else
{
currentAggRow = currentAggList.ElementAt(0).AggRow;
currentAggRowParameter = currentAggList.ElementAt(0).AggRowParameter;
currentWorks
静态方法没有任何内在的东西，当被多个线程访问时，它会使它变慢，除非例如：
- 您有一些共享资源正在受到限制，例如共享
lock，或转到单个 UI 线程 - 您的线程数比可用的CPU内核多，只需进行大量切换 即可
- 您正在最大化其他一些资源，例如磁盘 IO、网络 IO 等
由于您没有发布任何代码，我们只能猜测。