MaxDecayTaskAdvocate Class Reference

Inheritance diagram for MaxDecayTaskAdvocate:

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[legend]List of all members.

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Detailed Description

An advocate that reacts quickly to increases in CPU usage, but slow to react to decreases in usage, making it an ideal generic advocate.

The actual implementation works by sending an advice that reflects the highest usage seen in the last N periods, where N can be set using the SetDelegateAttribute method.

Definition at line 31 of file MaxDecayTaskAdvocate.hh.

Public Member Functions
	MaxDecayTaskAdvocate (void)
	Default constructor.
virtual	~MaxDecayTaskAdvocate (void)
	Destructor.
virtual void	SetDelegateAttribute (const char *id, const CORBA::Any &value) throw (CORBA::SystemException)
	Parameters: id  The attribute identifier. value  The new attribute value.
virtual CORBA::Any *	GetDelegateAttribute (const char *id) throw (CORBA::SystemException)
	Parameters: id  The attribute identifier. Returns: The attribute's current value.
virtual Broker::CPUReserve	PassCPU (Broker::RealTimeTask_ptr rtt, const Broker::CPUReserve &status, const Broker::CPUReserve &advice, const Broker::KeyedReportParameters &krp) throw (CORBA::SystemException)
	This method would then be used by adaptation proxies to change the advice parameter to their liking. Parameters: rtt  The task object that was actually added to the manager. status  The CPU usage of the task in microseconds. advice  The amount of CPU time, in microseconds, that the application would like for the next period. krp  Non-standard report parameters that are indexed by key name. Returns: The actual CPU reserve given to the task. See also: ChangeTaskCPU
Private Attributes
CORBA::ULong	md_LastAdvice
	The last advice reported by this advocate.
CORBA::ULong	md_SubMax
	The maximum observed usage that is still below the last advice given.
unsigned int	md_Decay
	The number of periods left before the reservation will be dropped to the value of md_SubMax.
CORBA::ULong	md_DecayAfter
	The number of periods after which the advice should decay.

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Member Function Documentation

CORBA::Any_ptr MaxDecayTaskAdvocate::GetDelegateAttribute (  const char *  id  )  throw (CORBA::SystemException) [virtual]

Parameters: id  The attribute identifier. Returns: The attribute's current value. Currently supported 'id' values are: decay-after The number of periods to wait before dropping the CPU usage. last-advice The last advice given by the advocate. Reimplemented from DelegateMixin< Broker::RealTimeTask, Broker::RealTimeTask_var >. Definition at line 77 of file MaxDecayTaskAdvocate.cc. References DelegateMixin< Broker::RealTimeTask, Broker::RealTimeTask_var >::GetDelegateAttribute().

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void MaxDecayTaskAdvocate::SetDelegateAttribute (  const char *  id, const CORBA::Any &  value )  throw (CORBA::SystemException) [virtual]

Parameters: id  The attribute identifier. value  The new attribute value. Currently supported 'id' values are: decay-after The number of periods to wait before dropping the CPU usage. Reimplemented from DelegateMixin< Broker::RealTimeTask, Broker::RealTimeTask_var >. Definition at line 49 of file MaxDecayTaskAdvocate.cc. References DelegateMixin< Broker::RealTimeTask, Broker::RealTimeTask_var >::SetDelegateAttribute(). Referenced by paGetAdvocate().

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The documentation for this class was generated from the following files:

• MaxDecayTaskAdvocate.hh
• MaxDecayTaskAdvocate.cc

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