CN109783239A - Multithreading optimization method, system and the medium of SystemC emulation dispatch core - Google Patents
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Abstract
The present invention provides multithreading optimization method, system and the media of a kind of SystemC emulation dispatch core, comprising: task separating step: the calculating task of SystemC emulation being removed into other operating system threads in addition to affiliated operating system and is carried out；Module communication steps: injection call back function realizes the communication of external calculating task and SystemC thread；Tasks synchronization step: by temporal decoupling and control duration, the synchronization of multiple artificial tasks is realized.The present invention compares the prior art, can preferably make full use of multiprocessor machine currently popular very well, improves simulation efficiency；And emulation is controlled by minimum period emulation cycle and is synchronized, it is ensured that the correctness of emulation；In addition call back function uses the scalability for making analogue system better, the upgrading and maintenance enhanced convenience of analogue system.
Description
Technical field
The present invention relates to technical field of system simulation, and in particular, to a kind of multithreading of SystemC emulation dispatch core is excellent
Change method, system and medium.
Background technique
With the continuous development of multi-core processor, multi-core simulation technology has become the research hotspot of instruction set simulator.If
It counts and realizes that a kind of high performance multi-core simulation device has very important meaning to new architecture, system software is studied.
Also occur some simulator frames before.
SystemC (SC) is a kind of System Design Language based on C Plus Plus.Actually, it be by one to hardware not
The C++ class library emulated with abstraction hierarchy and a kernel independent of any hardware form.It is supported in system design
The abstract model of each different levels or rank, including functional level model, timing grade model, service level model, behavioral scaling model,
Register transfer level model etc..Therefore, SC can effectively complete software/hardware co-development.
The core component of SC is the emulation core simulated to system action.And in simulation kernel, scheduling component is again
It is core.With the continuous development of multi-core processor, multi-core simulation technology has become the research hotspot of instruction set simulator.
A kind of architecture that high performance multi-core simulation device is new to research is designed and Implemented, system software has very important meaning
Justice.Also occur some simulator frames before.Such as it is modeled based on transaction-level
(TransactionLevelModelingTLM) instruction set simulator developed, and much peripheral hardware simulations based on the frame
Product.These simulators are generally used SystemC as programming language, and prototype system to be simulated is divided into difference by developer
Functional module (Module), the communication between module and module completed by TLM communication module.In simulation process, SystemC
Kernel is responsible for the scheduling to modules.In order to reduce the complexity of design, SystemC kernel uses serial scheduling mode.
Its descriptive power to parallel system is also just weakened in this way.This characteristic of SystemC to simulate existing monokaryon
System becomes abnormal difficult when being expanded into multicore, parallel system.
The serial scheduling strategy as used by SC makes its scarce capacity that seems in terms of Parallel Design.Especially, it is very difficult to
Complete the extension to existing monokaryon simulator to multi-core simulation device.
Patent document CN102725735B (application number: 201180002703.2) a kind of multithreading synergy emulation method and is
System, multithreading synergy emulation method characterized by comprising the software module after starting obtains the process number of hardware module, and
The pipeline communication mode communicated with the hardware module is created according to the process number；The software module is logical by the pipeline
Letter mode is interacted with the hardware module, so that the software module and the hardware module collaborative simulation.
Summary of the invention
For the defects in the prior art, the object of the present invention is to provide a kind of multithreadings of SystemC emulation dispatch core
Optimization method, system and medium.
A kind of multithreading optimization method of the SystemC emulation dispatch core provided according to the present invention, comprising:
Task separating step: by the calculating task removing of SystemC emulation to other behaviour in addition to affiliated operating system
Make to carry out in system thread；
Module communication steps: injection call back function realizes the communication of external calculating task and SystemC thread；
Tasks synchronization step: by temporal decoupling and control duration, the synchronization of multiple artificial tasks is realized.
Preferably, the task separating step:
Invoking performance function executes distribution of computation tasks into other operating system threads parallel, calculates and needs to hold parallel
Time consumed by capable each calculating task, using the maximum duration in the time consumed by each calculating task as smallest synchronization week
Phase executes synchronizing cycle according to the smallest synchronization cycle set, controls synchronizing time point according to synchronizing cycle is executed；
The duration for executing synchronizing cycle is greater than or equal to the duration in smallest synchronization period.
Preferably, the module communication steps include:
SystemC synchronizing step: a call back function is injected for the execution thread of other operations, scheduler is next in scheduling
Call back function is executed when a execution synchronizing cycle, the call back function is performed, by the task suspension of execution thread, described time
After letter of transfer number is finished, the task recovery of execution thread is executed；
Time rate-determining steps: control simulation time promotes the duration with external calculating task.
Preferably, the time rate-determining steps:
SystemC process is enabled to be responsible for the propulsion of entire simulation process time, simulation time is promoted according to synchronizing cycle is executed,
At the end of executing synchronizing cycle, suspend all calculating tasks, it is next that SystemC process notifies that each calculating task starts
Execute the execution of synchronizing cycle.
Preferably, the tasks synchronization step:
The one local host time of SystemC process internal maintenance allows SystemC process in advance in current simulation time
It executes, when SystemC process needs to wait, then the local host time is increased, SystemC process is then enabled to execute waiting,
When the local host time being greater than preset execution synchronizing cycle or reaching synchronous point, all calculating task threads all suspend work
Make, then carry out data exchange, data exchange carries out the emulation of next cycle again after completing, complete to synchronize.
A kind of multithreading optimization system of the SystemC emulation dispatch core provided according to the present invention, comprising:
Task separation module: by the calculating task removing of SystemC emulation to other behaviour in addition to affiliated operating system
Make to carry out in system thread；
Module communication module: injection call back function realizes the communication of external calculating task and SystemC thread；
Tasks synchronization module: by temporal decoupling and control duration, the synchronization of multiple artificial tasks is realized.
Preferably, the task separation module:
Invoking performance function executes distribution of computation tasks into other operating system threads parallel, calculates and needs to hold parallel
Time consumed by capable each calculating task, using the maximum duration in the time consumed by each calculating task as smallest synchronization week
Phase executes synchronizing cycle according to the smallest synchronization cycle set, controls synchronizing time point according to synchronizing cycle is executed；
The duration for executing synchronizing cycle is greater than or equal to the duration in smallest synchronization period.
Preferably, the module communication module includes:
SystemC synchronization module: a call back function is injected for the execution thread of other operations, scheduler is next in scheduling
Call back function is executed when a execution synchronizing cycle, the call back function is performed, by the task suspension of execution thread, described time
After letter of transfer number is finished, the task recovery of execution thread is executed；
Time control module: control simulation time promotes the duration with external calculating task.
The time control module:
SystemC process is enabled to be responsible for the propulsion of entire simulation process time, simulation time is promoted according to synchronizing cycle is executed,
At the end of executing synchronizing cycle, suspend all calculating tasks, it is next that SystemC process notifies that each calculating task starts
Execute the execution of synchronizing cycle.
Preferably, the tasks synchronization module:
The one local host time of SystemC process internal maintenance allows SystemC process in advance in current simulation time
It executes, when SystemC process needs to wait, then the local host time is increased, SystemC process is then enabled to execute waiting,
When the local host time being greater than preset execution synchronizing cycle or reaching synchronous point, all calculating task threads all suspend work
Make, then carry out data exchange, data exchange carries out the emulation of next cycle again after completing, complete to synchronize.
A kind of computer readable storage medium for being stored with computer program provided according to the present invention, the computer journey
The step of the multithreading optimization method of described in any item SystemC emulation dispatch cores among the above is realized when sequence is executed by processor
Suddenly.
Compared with prior art, the present invention have it is following the utility model has the advantages that
The present invention can preferably make full use of multiprocessor machine currently popular very well, improve simulation efficiency；And lead to
Minimum period emulation cycle is crossed to control emulation and synchronize, it is ensured that the correctness of emulation；In addition call back function uses so that emulating
The scalability of system is better, the upgrading and maintenance enhanced convenience of analogue system.
Detailed description of the invention
Upon reading the detailed description of non-limiting embodiments with reference to the following drawings, other feature of the invention,
Objects and advantages will become more apparent upon:
Fig. 1 appoints for the calculating of the multithreading optimization method of SystemC emulation dispatch core provided by the invention, system and medium
Business implementation procedure schematic diagram.
Specific embodiment
The present invention is described in detail combined with specific embodiments below.Following embodiment will be helpful to the technology of this field
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that the ordinary skill of this field
For personnel, without departing from the inventive concept of the premise, several changes and improvements can also be made.These belong to the present invention
Protection scope.
A kind of multithreading optimization method of the SystemC emulation dispatch core provided according to the present invention, comprising:
Task separating step: by the calculating task removing of SystemC emulation to other behaviour in addition to affiliated operating system
Make to carry out in system thread；
Module communication steps: injection call back function realizes the communication of external calculating task and SystemC thread；
Tasks synchronization step: by temporal decoupling and control duration, the synchronization of multiple artificial tasks is realized.
Specifically, the task separating step:
Invoking performance function executes distribution of computation tasks into other operating system threads parallel, calculates and needs to hold parallel
Time consumed by capable each calculating task, using the maximum duration in the time consumed by each calculating task as smallest synchronization week
Phase executes synchronizing cycle according to the smallest synchronization cycle set, controls synchronizing time point according to synchronizing cycle is executed；
The duration for executing synchronizing cycle is greater than or equal to the duration in smallest synchronization period.
Specifically, the module communication steps include:
SystemC synchronizing step: a call back function is injected for the execution thread of other operations, scheduler is next in scheduling
Call back function is executed when a execution synchronizing cycle, the call back function is performed, by the task suspension of execution thread, described time
After letter of transfer number is finished, the task recovery of execution thread is executed；
Time rate-determining steps: control simulation time promotes the duration with external calculating task.
Specifically, the time rate-determining steps:
SystemC process is enabled to be responsible for the propulsion of entire simulation process time, simulation time is promoted according to synchronizing cycle is executed,
At the end of executing synchronizing cycle, suspend all calculating tasks, it is next that SystemC process notifies that each calculating task starts
Execute the execution of synchronizing cycle.
Specifically, the tasks synchronization step:
The one local host time of SystemC process internal maintenance allows SystemC process in advance in current simulation time
It executes, when SystemC process needs to wait, then the local host time is increased, SystemC process is then enabled to execute waiting,
When the local host time being greater than preset execution synchronizing cycle or reaching synchronous point, all calculating task threads all suspend work
Make, then carry out data exchange, data exchange carries out the emulation of next cycle again after completing, complete to synchronize.
The multithreading optimization system of SystemC emulation dispatch core provided by the invention, can give through the invention
The step process of the multithreading optimization method of SystemC emulation dispatch core is realized.Those skilled in the art can will be described
The multithreading optimization method of SystemC emulation dispatch core is interpreted as the multithreading optimization system of the SystemC emulation dispatch core
A preference.
A kind of multithreading optimization system of the SystemC emulation dispatch core provided according to the present invention, comprising:
Task separation module: by the calculating task removing of SystemC emulation to other behaviour in addition to affiliated operating system
Make to carry out in system thread；
Module communication module: injection call back function realizes the communication of external calculating task and SystemC thread；
Tasks synchronization module: by temporal decoupling and control duration, the synchronization of multiple artificial tasks is realized.
Specifically, the task separation module:
Invoking performance function executes distribution of computation tasks into other operating system threads parallel, calculates and needs to hold parallel
Time consumed by capable each calculating task, using the maximum duration in the time consumed by each calculating task as smallest synchronization week
Phase executes synchronizing cycle according to the smallest synchronization cycle set, controls synchronizing time point according to synchronizing cycle is executed；
The duration for executing synchronizing cycle is greater than or equal to the duration in smallest synchronization period.
Specifically, the module communication module includes:
SystemC synchronization module: a call back function is injected for the execution thread of other operations, scheduler is next in scheduling
Call back function is executed when a execution synchronizing cycle, the call back function is performed, by the task suspension of execution thread, described time
After letter of transfer number is finished, the task recovery of execution thread is executed；
Time control module: control simulation time promotes the duration with external calculating task.
The time control module:
SystemC process is enabled to be responsible for the propulsion of entire simulation process time, simulation time is promoted according to synchronizing cycle is executed,
At the end of executing synchronizing cycle, suspend all calculating tasks, it is next that SystemC process notifies that each calculating task starts
Execute the execution of synchronizing cycle.
Specifically, the tasks synchronization module:
The one local host time of SystemC process internal maintenance allows SystemC process in advance in current simulation time
It executes, when SystemC process needs to wait, then the local host time is increased, SystemC process is then enabled to execute waiting,
When the local host time being greater than preset execution synchronizing cycle or reaching synchronous point, all calculating task threads all suspend work
Make, then carry out data exchange, data exchange carries out the emulation of next cycle again after completing, complete to synchronize.
A kind of computer readable storage medium for being stored with computer program provided according to the present invention, the computer journey
The step of the multithreading optimization method of described in any item SystemC emulation dispatch cores among the above is realized when sequence is executed by processor
Suddenly.
Below by preference, the present invention is more specifically illustrated:
Preference 1:
A kind of multithreading optimization method of SystemC emulation dispatch core, comprising:
Part 1: the calculating task of SystemC emulation is removed into other operating system threads and is carried out.Pass through calculating
Time consumed by the calculating task for needing to execute parallel synchronizes the control at time point, usually takes executing tasks parallelly
The maximum duration smallest synchronization period the most.
Part 2: the communication with external function module.Realized by way of injecting call back function external calculating task with
The communication of SystemC thread.
Third portion: Time Decoupling and duration.
The task can be shifted to an earlier date in current simulation time execution for one local zone time of SystemC process internal maintenance.
When calculating task needs to wait, then local zone time is increased.Then SystemC process executes waiting.Once local zone time is big
Preset synchronizing cycle or reach synchronous point, then executes synchronization.
Wherein, part 2 includes following subdivision:
2.1st part: fully synchronized with SystemC.A call back function is injected for execution thread, scheduler is under scheduling
A cycle can execute this call back function, and call back function is performed thread task and is suspended, and call back function is finished, thread
Restore to execute.
2.2nd part: control simulation time promotes the duration with external calculating task.Duration is as adjustable
Parameter, can according to need and be adjusted.But task execution before often do not know complete calculating task need how long when
Between.This problem is solved, the growth of current task duration may be implemented in expansion time function.SystemC process is responsible for whole
The propulsion of a simulation process time, this process obtain minimum emulation cycle by calculating the simulation time of each task, when emulation
Between every time according to minimum emulation cycle promote, at the end of each emulation cycle, all calculating tasks can all be suspended, then
SystemC process is notified that each calculating task starts the execution of next cycle.
One skilled in the art will appreciate that in addition to realizing system provided by the invention in a manner of pure computer readable program code
It, completely can be by the way that method and step be carried out programming in logic come so that provided by the invention other than system, device and its modules
System, device and its modules are declined with logic gate, switch, specific integrated circuit, programmable logic controller (PLC) and insertion
The form of controller etc. realizes identical program.So system provided by the invention, device and its modules may be considered that
It is a kind of hardware component, and the knot that the module for realizing various programs for including in it can also be considered as in hardware component
Structure；It can also will be considered as realizing the module of various functions either the software program of implementation method can be Hardware Subdivision again
Structure in part.
Specific embodiments of the present invention are described above.It is to be appreciated that the invention is not limited to above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or modify within the scope of the claims, this not shadow
Ring substantive content of the invention.In the absence of conflict, the feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (10)
1. a kind of multithreading optimization method of SystemC emulation dispatch core characterized by comprising
Task separating step: by the calculating task removing of SystemC emulation to other operation systems in addition to affiliated operating system
It is carried out in system thread；
Module communication steps: injection call back function realizes the communication of external calculating task and SystemC thread；
Tasks synchronization step: by temporal decoupling and control duration, the synchronization of multiple artificial tasks is realized.
2. the multithreading optimization method of SystemC emulation dispatch core according to claim 1, which is characterized in that described
Business separating step:
Invoking performance function executes distribution of computation tasks into other operating system threads parallel, what calculating needed to execute parallel
Time consumed by each calculating task, using the maximum duration in the time consumed by each calculating task as the smallest synchronization period,
Synchronizing cycle is executed according to the smallest synchronization cycle set, controls synchronizing time point according to synchronizing cycle is executed；
The duration for executing synchronizing cycle is greater than or equal to the duration in smallest synchronization period.
3. the multithreading optimization method of SystemC emulation dispatch core according to claim 2, which is characterized in that the mould
Block communication steps include:
SystemC synchronizing step: a call back function is injected for the execution thread of other operations, scheduler is dispatching next hold
Row executes call back function when synchronizing cycle, and the call back function is performed, by the task suspension of execution thread, the readjustment letter
After number is finished, the task recovery of execution thread is executed；
Time rate-determining steps: control simulation time promotes the duration with external calculating task.
4. the multithreading optimization method of SystemC emulation dispatch core according to claim 3, which is characterized in that when described
Between rate-determining steps:
SystemC process is enabled to be responsible for the propulsion of entire simulation process time, simulation time is promoted according to synchronizing cycle is executed, held
At the end of row synchronizing cycle, suspend all calculating tasks, SystemC process notifies each calculating task to start next execution
The execution of synchronizing cycle.
5. the multithreading optimization method of SystemC emulation dispatch core according to claim 4, which is characterized in that described
Business synchronizing step:
The one local host time of SystemC process internal maintenance allows SystemC process to hold in advance in current simulation time
Row, the local host time when SystemC process needs to wait, is then increased, SystemC process is then enabled to execute waiting, when
When the local host time is greater than preset execution synchronizing cycle or reaches synchronous point, all calculating task threads all suspend work
Make, then carry out data exchange, data exchange carries out the emulation of next cycle again after completing, complete to synchronize.
6. a kind of multithreading optimization system of SystemC emulation dispatch core characterized by comprising
Task separation module: by the calculating task removing of SystemC emulation to other operating systems in addition to this operating system
It is carried out in thread；
Module communication module: injection call back function realizes the communication of external calculating task and SystemC thread；
Tasks synchronization module: by temporal decoupling and control duration, the synchronization of multiple artificial tasks is realized.
7. the multithreading optimization system of SystemC emulation dispatch core according to claim 6, which is characterized in that described
Business separation module:
Invoking performance function executes distribution of computation tasks into other operating system threads parallel, what calculating needed to execute parallel
Time consumed by each calculating task, using the maximum duration in the time consumed by each calculating task as the smallest synchronization period,
Synchronizing cycle is executed according to the smallest synchronization cycle set, controls synchronizing time point according to synchronizing cycle is executed；
The duration for executing synchronizing cycle is greater than or equal to the duration in smallest synchronization period.
8. the multithreading optimization system of SystemC emulation dispatch core according to claim 7, which is characterized in that the mould
Block communication module includes:
SystemC synchronization module: a call back function is injected for the execution thread of other operations, scheduler is dispatching next hold
Row executes call back function when synchronizing cycle, and the call back function is performed, by the task suspension of execution thread, the readjustment letter
After number is finished, the task recovery of execution thread is executed；
Time control module: control simulation time promotes the duration with external calculating task.
The time control module:
SystemC process is enabled to be responsible for the propulsion of entire simulation process time, simulation time is promoted according to synchronizing cycle is executed, held
At the end of row synchronizing cycle, suspend all calculating tasks, SystemC process notifies each calculating task to start next execution
The execution of synchronizing cycle.
9. the multithreading optimization system of SystemC emulation dispatch core according to claim 8, which is characterized in that described
Business synchronization module:
The one local host time of SystemC process internal maintenance allows SystemC process to hold in advance in current simulation time
Row, the local host time when SystemC process needs to wait, is then increased, SystemC process is then enabled to execute waiting, when
When the local host time is greater than preset execution synchronizing cycle or reaches synchronous point, all calculating task threads all suspend work
Make, then carry out data exchange, data exchange carries out the emulation of next cycle again after completing, complete to synchronize.
10. a kind of computer readable storage medium for being stored with computer program, which is characterized in that the computer program is located
Reason device realizes the step of the multithreading optimization method of SystemC emulation dispatch core described in any one of claims 1 to 5 when executing
Suddenly.
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