CN104731735A - Method for achieving high-performance loopback device through reference counting - Google Patents
Method for achieving high-performance loopback device through reference counting Download PDFInfo
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- CN104731735A CN104731735A CN201510131122.9A CN201510131122A CN104731735A CN 104731735 A CN104731735 A CN 104731735A CN 201510131122 A CN201510131122 A CN 201510131122A CN 104731735 A CN104731735 A CN 104731735A
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Abstract
The invention discloses a method for achieving a high-performance loopback device through reference counting, and relates to the field of computer data transmission technologies and communication. A reference counting technology is adopted, releasing of data internal storage used by a sender is postponed, a receiver is made to directly use the internal storage applied by the sender, and then the internal storage is released. The main implementation processes include the steps that the sender sends the data, a retrieving device transmits the data, and the receiver receives the data. By means of the method, multiple times of data copying in the data transmitting process are avoided, the computer processing time is saved, the speed of data transmission from the sender to the receiver is increased, and the performance of a whole software system is improved.
Description
Technical field
The present invention relates to data transfer of computer technology and the communications field, is exactly a kind of method utilizing reference count to realize high-performance loop back device specifically.
Background technology
In data transfer of computer technology and the communications field, the communication process of the transmission data in system in conventional same system and reception data.Such as: when upper layer communication software development, loop back device first can be utilized to carry out data communication, can determine it is not that hardware net equipment is introduced when testing and finding defect, thus reduce scope to location defective locations, accelerate the speed of process defect.
Loop back device is used for the communication of data transmission in same system, data copy process in internal memory, more consuming time in computer system, tradition loop back device is when connecting data communication between sender and recipient, adopt first copies data in the buffer memory of loop back device, sender just completes process of transmitting, when recipient receives data from loop back device, data are needed to copy away from the buffer memory of loop back device, this processing mode needs repeatedly data copy, it is more consuming time for carrying out repeatedly data copy in computer systems, which, hydraulic performance decline can be caused obvious.
Summary of the invention
In order to reach the object realizing high-performance loop back device, propose a kind of method utilizing reference count to realize high-performance loop back device.
A kind of method utilizing reference count to realize high-performance loop back device of the present invention, the technical scheme solving the problems of the technologies described above employing is as follows: the method adopts reference counting technique, postpone the datarams that release sender uses, the internal memory allowing recipient directly use sender to apply for, and then releasing memory; Its main implementation process comprises sender and sends data, gains equipment transmission data and recipient receives data three steps.
Preferably, the method adopts reference counting technique, suppose that agreement reference count ref variable represents, often increase by one use internal memory person then reference count ref add 1, often reduce user then reference count ref subtract 1, represent when reference count ref is 0 and do not had user to continue to employ, then releasing memory when reference count ref is 0.
Preferably, sender uses the internal memory application function application internal memory containing reference count management, and sender uses this internal memory to deposit the data that will send, and now arranging reference count ref is 1.
Preferably, sender calls the transmission function transmission data that loop back device provides.
Preferably, reference count ref is added 1 by the transmission function of loop back device; Represent that loop back device is using this block internal memory as an internal memory user, now the value of reference count ref equals 2.
Preferably, loop back device sends function complete operate reference count ref in transmission function after, and the sender calling loop back device transmission function learns and sends successfully, then call the internal memory release function containing reference count management.
Preferably, the treatment step in internal memory release function: first reference count ref is subtracted 1, then judge whether reference count ref is 0, if reference count ref equals 0, discharges internal memory, if reference count ref is not equal to 0, inreal releasing memory.
Preferably, loop back device notification receiver receives data, and reference count ref is added 1 by recipient, and now the value of reference count ref equals 2; Then recipient receives data, usage data, and call the internal memory release function releasing memory containing reference count management after recipient finishes using, now the value of reference count ref equals 1, and recipient notifies that loop back device is disposed simultaneously.
Preferably, after recipient is disposed, loop back device does not re-use this block internal memory, then call the internal memory release function releasing memory containing reference count management; In the current internal memory release function operation process containing reference count management, after reference count ref is subtracted 1, the value of reference count ref equals 0, shows that internal memory really discharges.
The beneficial effect that a kind of method utilizing reference count to realize high-performance loop back device of the present invention compared with prior art has is: the method considers that loop back device is applied on same hardware system, adopt the dispose procedure of the mode managing internal memory of reference count, the internal memory that sender is applied for postpones release, avoid the repeatedly data copy in data transmission procedure, reduce repeatedly data copy and save computer processing time, improve the data rate between sender to recipient, improve the performance of whole software systems.
Accompanying drawing explanation
The schematic diagram of accompanying drawing 1 for utilizing reference count to realize the method for high-performance loop back device.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, below in conjunction with specific embodiment, and with reference to accompanying drawing, a kind of method utilizing reference count to realize high-performance loop back device of the present invention is further described.
A kind of method utilizing reference count to realize high-performance loop back device of the present invention, main consideration reduces repeatedly data copy and saves computer processing time, the internal memory adopting reference counting technique to make sender store data postpones release, the internal memory allowing recipient directly use sender to apply for, avoid the repeatedly data copy of traditional loop back device data transmission procedure, which reduce repeatedly the time of data copy, substantially increase software system performance.
Embodiment:
A kind of method utilizing reference count to realize high-performance loop back device described in the present embodiment, adopt reference counting technique, postpone the datarams that release sender uses, the internal memory allowing recipient directly use sender to apply for, and then releasing memory, which reduce repeatedly the time of data copy, greatly improve the handling property of loop back device.
This utilizes reference count to realize the method for high-performance loop back device, mainly comprises sender and sends data, gains equipment transmission data and recipient receives data three steps; Suppose that agreement reference count ref variable represents, often increase by one use internal memory person then reference count ref add 1, often reduce user then reference count ref subtract 1, represent when reference count ref is 0 and do not had user to continue to employ, then releasing memory when reference count ref is 0.
Utilize reference count to realize the method for high-performance loop back device described in the present embodiment, as shown in Figure 1, its concrete implementing procedure is as follows:
Sender uses the internal memory application function application internal memory containing reference count management, and sender uses this internal memory to deposit the data that will send, and now arranging reference count ref is 1, represents in this to have a user;
Sender calls the transmission function that loop back device provides, and sends data;
Reference count ref is added 1 by the transmission function of loop back device, and represent that loop back device is using this block internal memory as an internal memory user, reference count ref is added 1 and also just identifies current memory and can not be released, now the value of reference count ref equals 2.
Loop back device sends function complete operate reference count ref in transmission function after, and the sender calling loop back device transmission function learns and sends successfully, then call the internal memory release function containing reference count management.Treatment step in this internal memory release function first reference count ref is subtracted 1, then judges whether reference count ref is 0, if reference count ref equals 0, discharges internal memory, if reference count ref is not equal to 0, and inreal releasing memory.So the transmission function calling loop back device as sender is sent, then after calling the internal memory release function containing reference count management, now the value of reference count ref equals 1.
Loop back device notification receiver receives data, reference count ref is added 1 by recipient, now the value of reference count ref equals 2, then recipient receives data, usage data, call the internal memory release function releasing memory containing reference count management after recipient finishes using, now the value of reference count ref equals 1.Recipient is disposed after reception data described above and usage data, and notice loop back device is disposed.
After recipient is disposed, loop back device will not need to re-use this block internal memory yet, then call the internal memory release function releasing memory containing reference count management, in the current internal memory release function operation process containing reference count management, find that the value of reference count ref equals 0, so just internal memory has really been discharged after reference count ref is subtracted 1.
Comprehensive above flow process describes, from sender to loop back device, then from loop back device to recipient, whole data transmission procedure does not relate to data copy, also reach the data transmission object from sender to recipient, reduce repeatedly data copy and save computer processing time.
Above-mentioned embodiment is only concrete case of the present invention; scope of patent protection of the present invention includes but not limited to above-mentioned embodiment; any claims according to the invention and any person of an ordinary skill in the technical field to its suitable change done or replacement, all should fall into scope of patent protection of the present invention.
Claims (9)
1. utilize reference count to realize a method for high-performance loop back device, it is characterized in that, adopt reference counting technique, postpone the datarams that release sender uses, the internal memory allowing recipient directly use sender to apply for, and then releasing memory; Its main implementation process comprises sender and sends data, gains equipment transmission data and recipient receives data three steps.
2. a kind of method utilizing reference count to realize high-performance loop back device according to claim 1, it is characterized in that, the method adopts reference counting technique, suppose that agreement reference count ref variable represents, often increase by one use internal memory person then reference count ref add 1, often reduce user then reference count ref subtract 1, represent when reference count ref is 0 and do not had user to continue to employ, then releasing memory when reference count ref is 0.
3. a kind of method utilizing reference count to realize high-performance loop back device according to claim 2, it is characterized in that, sender uses the internal memory application function application internal memory containing reference count management, and sender uses this internal memory to deposit the data that will send, and now arranging reference count ref is 1.
4. a kind of method utilizing reference count to realize high-performance loop back device according to claim 3, is characterized in that, the transmission function that sender calls loop back device to be provided sends data.
5. a kind of method utilizing reference count to realize high-performance loop back device according to claim 4, it is characterized in that, reference count ref is added 1 by the transmission function of loop back device.
6. a kind of method utilizing reference count to realize high-performance loop back device according to claim 5, it is characterized in that, after loop back device operates reference count ref in transmission function, transmission function is complete, sender learns and sends successfully, then call the internal memory release function containing reference count management.
7. a kind of method utilizing reference count to realize high-performance loop back device according to claim 6, it is characterized in that, treatment step in internal memory release function: first reference count ref is subtracted 1, judge whether reference count ref is 0 again, if reference count ref equals 0, discharge internal memory, if reference count ref is not equal to 0, inreal releasing memory.
8. a kind of method utilizing reference count to realize high-performance loop back device according to claim 7, it is characterized in that, loop back device notification receiver receives data, reference count ref is added 1 by recipient, then recipient receives data, usage data, call the internal memory release function releasing memory containing reference count management after recipient finishes using, now the value of reference count ref equals 1, and recipient notifies that loop back device is disposed simultaneously.
9. a kind of method utilizing reference count to realize high-performance loop back device according to claim 8, it is characterized in that, after recipient is disposed, loop back device does not re-use this block internal memory, then call the internal memory release function releasing memory containing reference count management, after reference count ref is subtracted 1, the value of reference count ref equals 0, and internal memory really discharges.
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