CN105426316A - Quota control temperature based racetrack memory chip and control method therefor - Google Patents

Quota control temperature based racetrack memory chip and control method therefor Download PDF

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Publication number
CN105426316A
CN105426316A CN201510782745.2A CN201510782745A CN105426316A CN 105426316 A CN105426316 A CN 105426316A CN 201510782745 A CN201510782745 A CN 201510782745A CN 105426316 A CN105426316 A CN 105426316A
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racing track
quota
memory stick
territory
data
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CN105426316B (en
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孙广宇
张超
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Peking University
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Peking University
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02Addressing or allocation; Relocation
    • G06F12/0223User address space allocation, e.g. contiguous or non contiguous base addressing
    • G06F12/023Free address space management
    • G06F12/0238Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory
    • G06F12/0246Memory management in non-volatile memory, e.g. resistive RAM or ferroelectric memory in block erasable memory, e.g. flash memory
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B33/00Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/14Reducing influence of physical parameters, e.g. temperature change, moisture, dust
    • G11B33/1406Reducing the influence of the temperature
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2212/00Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
    • G06F2212/72Details relating to flash memory management
    • G06F2212/7201Logical to physical mapping or translation of blocks or pages
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06FELECTRIC DIGITAL DATA PROCESSING
    • G06F2212/00Indexing scheme relating to accessing, addressing or allocation within memory systems or architectures
    • G06F2212/72Details relating to flash memory management
    • G06F2212/7209Validity control, e.g. using flags, time stamps or sequence numbers

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Memory System Of A Hierarchy Structure (AREA)
  • Hall/Mr Elements (AREA)

Abstract

The invention discloses a quota control temperature based racetrack memory chip and a control method therefor. The racetrack memory chip comprises a substrate, racetrack memory strips, a filling layer and a heat dissipation apparatus. A mobile quota is set in a program running interval, so that hot spot dispersion is performed in time; and moreover, a data block is stored in the non-adjacent racetrack memory strips, so that hot spot dispersion is performed in space. The invention provides a control method for a temperature rise of a racetrack memory due to mobile operation. The method comprehensively considers hot spot diffusion in time and space, so that the temperature rise of the chip can be reduced as far as possible; and due to analog display, the performance loss caused by the method is only 5% averagely.

Description

A kind of racing track storage chip based on quota control temperature and control method thereof
Technical field
The present invention relates to racing track memory technology, particularly relate to a kind of racing track storage chip based on quota control temperature and control method thereof.
Background technology
Racing track storer (RacetrackMemory), is also called neticdomain wall storer (Domainwallmemory), is a kind of storer based on storing data from gyromagnetic material magnetic domain wall moving characteristic.Racing track stores due to the storage density of its superelevation and access speed, becomes the study hotspot of educational circles, industry at present just gradually.Racing track memory is stored in a large amount of magnetic domains on strip magnetic material to store data.But for supporting highdensity storage, racing track storage introduces new operation: mobile (shift).A racing track memory stick (RacetrackmemoryStripe, RS) is divided into multiple isometric territory, and the arrangement in territory is called territory sequence, and uniform some access ends of distribution, each access end is responsible for access one section of territory.For accessing each territory in this section of territory, needing territory to be moved left and right on RS (only have territory relative to the movement of RS, access end and RS physically do not move), making the territory of required access corresponding at access end place.In prior art, mobile operation relies on the movement of neticdomain wall: neticdomain wall, under spinning current drives, nano wire moves and finally stops at anchor region (pinningsite).But calculating and experiment all show, movement can produce amount of heat, thus causes the change of storage chip temperature.High temperature rising can cause racing track stored electricity parameter change, and magnetic domain wall moving speed is drifted about, and storage medium stability declines, and even causes storage medium to burn time serious.At present, prior art all can not ensure that racing track is stored in temperature when normally working and is no more than set quota, does not then have technology can control it and moves density.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of temperature-controlled process based on quota for the operation of racing track storing mobile; When substantially not affecting performance, racing track can be stored the temperature rising caused by mobile operation and controlling in rational scope by method of the present invention.
One object of the present invention is to provide a kind of racing track storage chip based on quota control temperature.
Racing track storage chip based on quota control temperature of the present invention comprises: substrate, racing track memory stick, packed layer and heat abstractor; Wherein, at the parallel nano wire of Grown many as racing track memory stick; The gap of nano wire and above form packed layer; Packed layer arranges heat abstractor; Each racing track memory stick is divided into M territory, formative region sequence, and N number of access end that each racing track memory stick distributes equably, each access end is responsible for access one section of territory; The storage of a data block adopts focus dispersing mode, namely the territory that the territory coordinate during data block is dispersed on k racing track memory stick territory sequence is identical stores, and this k racing track memory stick is non-conterminous mutually, the set being used for jointly storing k racing track memory stick of a data block forms a memory stick bunch (group); The corresponding port position register in position of the territory sequence in the racing track memory stick at each data block place; According to the coefficient of heat conductivity of chip, the number of the storage racing track bar that the area obtaining heat dissipation region can hold is 1/ β, the ratio of the total magnetic stripe number in the number of the racing track memory stick then in unit area shared by same data block and heat dissipation region is β, and wherein, M, N, k and 1/ β are natural number.
To distribute N number of access end for M territory on a racing track memory stick, if M is the multiple of N, then each access end access M/N territory, if M is not the multiple of N, then each access end is accessed on M/N and is rounded, i.e. [M/N].
Heat dissipation region is a panel region of isothermal body, a normally decoding arrays in chip.
Substrate adopts monocrystalline silicon; Nano wire adopts crystalline silicon dioxide, by silicon substrate autoxidation (nativeoxidation); Packed layer adopts the silicon dioxide of amorphous state.
Another object of the present invention is the temperature-controlled process providing a kind of racing track storage chip based on quota control temperature.
The temperature-controlled process of the racing track storage chip based on quota control temperature of the present invention, comprises the following steps:
1) focus dispersing mode is adopted to store data: data block is dispersed on the identical territory of sequence number in the territory sequence on k racing track memory stick and stores, and this k racing track memory stick is non-conterminous mutually, the set being used for jointly storing k racing track memory stick of a data block forms a memory stick bunch, coefficient of heat conductivity according to chip calculates, the number of the storage racing track bar that the area obtaining heat dissipation region can hold is 1/ β, the number of the racing track memory stick then in unit area shared by same data block is β with the ratio of the number of the total racing track memory stick in heat dissipation region,
2) when a program traffic coverage (period) starts, controller is arranged in a program traffic coverage can mobile " quota " (quota) of step number setting of movement, and the ratio of quota and program traffic coverage is α;
3) when the request of a visit data block arrives racing track storer, ask to decode according to the address of access, obtain the territory coordinate of request access address decoder, each memory stick bunch has a port position register to be used to refer to the relative position of the territory sequence at access port and memory stick bunch place, by the territory coordinate of the numerical value and request access address decoder that compare port position register, draw the distance needing movement;
4) controller deducts the quota expense of movement from remaining quota, if quota is enough, the movement that walks abreast of multiple racing track memory sticks at memory stick bunch place can perform read block; If not, that accessed data block will be taken as freezes block, enters step 5);
5) marker bit freezed in the label of block is checked, if it is clean (clean) data, it is invalid that valid data (valid) position in the label freezing block is set to by controller, and return controller fail data (miss), make request can continue to store to next stage to initiate request of data; If dirty (dirty) data, controller will get clogged, to wait for the beginning of next program traffic coverage.
Wherein, in step 1) in, heat dissipation region is a panel region of isothermal body, a normally decoding arrays in chip.According to the bits allocation of data block on k racing track memory stick, each bit is distributed on a racing track memory stick.Calculating β is carried out according to the speed of heat conduction and heat production interval.
In step 2) in, controller is the logic control element controlling racing track storage operation.Quota is defined as transportable total step number in a program traffic coverage; It is a step that a territory moves to adjacent territory.When quota is used up, except the next program traffic coverage of non-entry, more mobile operation can not be had again to be performed.
For control temperature rises above zone of reasonableness (20 degrees Celsius), α and β product should be not more than 1/40, to ensure thermal stability.In a program traffic coverage transportable maximum step number (quota) can be expressed as α be multiplied by the length of program traffic coverage with move the ratio of the time overhead moved a step.
Quota is divided into two kinds: clean quota of data and dirty data quota.The request of an access net amount certificate can only use clean quota of data, and the request of accessing dirty data preferentially uses dirty data quota, can use clean quota of data when dirty data quota is inadequate.Clean quota of data is identical with mobile quota before with the summation of dirty data quota, ensure that temperature controlled consistance.Simple for stating, the ratio of definition dirty data quota and total quota is γ.When γ is 1, clean quota of data is 0, and therefore the request of all access net amount certificates all can not perform mobile operation; And when γ is 0, dirty data quota is 0, optimization method deteriorates to straightforward procedure.
The present invention arranges mobile quota in a program traffic coverage, thus carries out focus dispersion from the time; Further, a data block is stored on mutual non-conterminous multiple racing track memory stick, from spatially carrying out focus dispersion.
Advantage of the present invention:
The invention provides the control method that a set of racing track storer causes temperature to rise because of mobile operation; Consider the method for time, focus dispersion spatially, can the temperature of reduction chip as much as possible raise; Simulative display, the performance loss that method of the present invention causes on average only has 5%.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the racing track storage chip based on quota control temperature of the present invention;
Fig. 2 is the schematic diagram of the storage mode of a data block of the racing track storage chip based on quota control temperature of the present invention, wherein, a (), for not adopting the schematic diagram of focus dispersing mode, (b) is the schematic diagram adopting focus dispersing mode;
Fig. 3 is the process flow diagram of the temperature-controlled process of the racing track storage chip based on quota control temperature of the present invention.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention will be further described.
As shown in Figure 1, the racing track storage chip based on quota control temperature of the present embodiment comprises: substrate 1, racing track memory stick 2, packed layer 3 and heat abstractor 4; Wherein, many parallel nano wires are grown on substrate 1 as racing track memory stick 2; The gap of nano wire and above formed packed layer 3; Heat abstractor 4 is set on silica.Adopt on monocrystalline silicon at substrate 1 and form silicon dioxide, be followed successively by packaging environment substrate 01 and pcb board 02 below; Nano wire 2 adopts Co 20fe 60b 20nano wire packed layer 3 adopts the silicon dioxide of amorphous state; It is thermal grease between packed layer 3 and heat abstractor 4.
Racing track storage chip is a physical concept, and racing track storer is its logical concept.
During duty, the heat of racing track memory stick is mainly produced under joule heating effect by the current impulse of nano wire inside promotion magnetic domain wall moving, heat is while making nano wire heat up, spread through the packed layer on upper strata and the substrate of lower floor, and then by the heat exchange action between chip skin and heat radiator, finally heat is exported to the external world.
Racing track memory stick can store multiple bit, but all bit storage of same data block are not efficient on a racing track memory stick.Because this will cause racing track memory stick repeatedly move and access.A kind of more common efficient data mapping mode is dispersed on multiple racing track memory stick by a data block, and multiple racing track memory stick moves simultaneously, thus parallel read data.But these racing track memory stick placed adjacent can be caused hot localised points, because the magnetic stripe of unit area internal heat generation is fewer, then nano wire layer temperature rises fewer.Therefore, the racing track memory stick that have mapped same data block is placed respectively in storage array, can increasing heat radiation area, reduce temperature and raise, as shown in Figure 2.Using the ratio of the magnetic stripe number shared by data block same in unit area and the total magnetic stripe number in region as β.Coefficient of heat conductivity according to chip calculates, and the area that can regard as same heat dissipation region only can hold 8 magnetic stripes.Therefore, β is set to 1/8.Calculating β is carried out according to the speed of heat conduction and heat production interval, not identical under different situations, β is reduced to the inverse of the spacing+1 of two racing track memory sticks nearest in same bunch here.
For realizing control method of the present invention, the present embodiment is using racing track storer as the last level cache in CPU, and this grade of storage is generally group and is connected (set-associative), and each data block comprises label and data two parts.All data sharing group addresss in a group (set), and distinguished with label.Usually, the access of last level cache first compares label, visits again data after hit.When a request arrives cache controller, ask to decode according to the address of its access, thus be sent to corresponding group.In group, multiple label compares and determines whether to hit.Meanwhile, the data be hit need to check validity (validity) and consistance (coherence) state.Data of the present invention store and ensure that the access of label does not need mobile operation, therefore, compare label and do not relate to mobile operation.If access hit is on an effective information, the racing track memory stick storing data will be moved to assigned address, and corresponding data is performed corresponding read-write operation then.Now, if movement and read-write operation can complete smoothly, buffer memory performs this request to be terminated, and can be next request service.If result is miss (miss) or data invalid (invalid), request will be sent to next stage and be stored (being main memory) herein, be cached with and may block follow-up request, until this request completes in next stage storage.Cache controller controls the read operation of racing track storer.
The temperature-controlled process of the racing track storage chip based on quota control temperature of the present embodiment, comprises the following steps:
1) territory that the sequence number during the data block of 32 bits is dispersed on 32 racing track memory sticks territory sequence is identical stores, and these 32 racing track memory sticks are non-conterminous mutually, coefficient of heat conductivity according to chip calculates, the number of the storage racing track bar that the area obtaining heat dissipation region can hold is 8, then the number of the racing track memory stick in unit area shared by same data block is 1/8 with the ratio of the number of the total racing track memory stick in heat dissipation region.
2) when a program traffic coverage starts, cache controller to be arranged in a program traffic coverage and the step number of movement can to set mobile quota, and the ratio of quota and program traffic coverage is α; Quota is divided into two kinds: clean quota of data and dirty data quota, the ratio of definition dirty data quota and total quota is γ.
3) when the request of a visit data block arrives buffer memory, ask to decode according to the address of access, obtain the territory coordinate of request access address decoder, thus be sent to corresponding group, in group, multiple label compares and determines whether to hit, and the data be hit need to check validity and coherency state; If access hit is on an effective information, then enter step 4), if result is miss (miss) or data invalid (invalid), request will be sent to next stage and be stored (being main memory) herein, be cached with and may block follow-up request, until this request completes in next stage storage.
4) each memory stick bunch has a port position register to be used to refer to the relative position of the territory sequence at access port and memory stick bunch place, by the territory coordinate of the numerical value and request access address decoder that compare port position register, draw the distance needing movement.
5) cache controller deducts the quota expense of movement from remaining quota, if quota is enough, the movement that walks abreast of multiple racing track memory sticks at memory stick bunch place can perform read block; If not, that accessed data block will be taken as freezes block, enters step 6).
6) marker bit freezed in the label of block is checked, if it is net amount certificate, it is invalid that valid data (valid) position in the label freezing block is set to by cache controller, and return cache controller fail data (miss), makes request can continue to store to next stage to initiate request of data; If dirty data, cache controller will get clogged, to wait for next interval beginning.
It is finally noted that, the object publicizing and implementing mode is to help to understand the present invention further, but it will be appreciated by those skilled in the art that: without departing from the spirit and scope of the invention and the appended claims, various substitutions and modifications are all possible.Therefore, the present invention should not be limited to the content disclosed in embodiment, and the scope that the scope of protection of present invention defines with claims is as the criterion.

Claims (10)

1. based on a racing track storage chip for quota control temperature, it is characterized in that, described racing track storage chip comprises: substrate, racing track memory stick, packed layer and heat abstractor; Wherein, at the parallel nano wire of Grown many as racing track memory stick; The gap of nano wire and above form packed layer; Packed layer arranges heat abstractor; Each racing track memory stick is divided into M territory, formative region sequence, and N number of access end that each racing track memory stick distributes equably, each access end is responsible for access one section of territory; The storage of a data block adopts focus dispersing mode, namely the territory that the territory coordinate during data block is dispersed on k racing track memory stick territory sequence is identical stores, and this k racing track memory stick is non-conterminous mutually, the set being used for jointly storing k racing track memory stick of a data block forms a memory stick bunch; The corresponding port position register in position of the territory sequence in the racing track memory stick at each data block place; According to the coefficient of heat conductivity of chip, the number of the storage racing track bar that the area obtaining heat dissipation region can hold is 1/ β, the ratio of the total magnetic stripe number in the number of the racing track memory stick then in unit area shared by same data block and heat dissipation region is β, and wherein, M, N, k and 1/ β are natural number.
2. racing track storage chip as claimed in claim 1, is characterized in that, to distribute N number of access end for M territory on a racing track memory stick, if M is the multiple of N, then each access end access M/N territory, if M is not the multiple of N, then each access end access M/N rounds, i.e. [M/N].
3. racing track storage chip as claimed in claim 1, it is characterized in that, described heat dissipation region is a panel region of isothermal body, is a decoding arrays in chip.
4. racing track storage chip as claimed in claim 1, is characterized in that, described substrate adopts monocrystalline silicon; Described nano wire adopts crystalline silicon dioxide, by silicon substrate autoxidation; Described packed layer adopts the silicon dioxide of amorphous state.
5. based on a temperature-controlled process for the racing track storage chip of quota control temperature, it is characterized in that, described control method comprises the following steps:
1) focus dispersing mode is adopted to store data: data block is dispersed on the identical territory of sequence number in the territory sequence on k racing track memory stick and stores, and this k racing track memory stick is non-conterminous mutually, the set being used for jointly storing k racing track memory stick of a data block forms a memory stick bunch, coefficient of heat conductivity according to chip calculates, the number of the storage racing track bar that the area obtaining heat dissipation region can hold is 1/ β, the number of the racing track memory stick then in unit area shared by same data block is β with the ratio of the number of the total racing track memory stick in heat dissipation region, wherein, k and 1/ β is natural number,
2) when a program traffic coverage starts, controller is arranged in a program traffic coverage can the step number setting mobile " quota " of movement, and the ratio of quota and program traffic coverage is α;
3) when the request of a visit data block arrives racing track storer, ask to decode according to the address of access, obtain the territory coordinate of request access address decoder, each memory stick bunch has a port position register to be used to refer to the relative position of the territory sequence at access port and memory stick bunch place, by the territory coordinate of the numerical value and request access address decoder that compare port position register, draw the distance needing movement;
4) controller deducts the quota expense of movement from remaining quota, if quota is enough, the movement that walks abreast of multiple racing track memory sticks at memory stick bunch place can perform read block; If not, that accessed data block will be taken as freezes block, enters step 5);
5) check the marker bit that freezes in the label of block, if it is net amount certificate, it is invalid that valid data position in the label freezing block is set to by controller, and return controller fail data, makes request can continue to store to next stage to initiate request of data; If dirty data, controller will get clogged, and waits for the beginning of next program traffic coverage.
6. control method as claimed in claim 5, is characterized in that, in step 1) in, according to the bits allocation of data block on k racing track memory stick, each bit is distributed on a racing track memory stick.
7. control method as claimed in claim 5, is characterized in that, in step 1) in, carry out calculating β according to the speed of heat conduction and heat production interval.
8. control method as claimed in claim 5, is characterized in that, in step 2) in, quota is defined as transportable total step number in a program traffic coverage; It is a step that a territory moves to adjacent territory; Quota in a program traffic coverage is expressed as α and is multiplied by the length of program traffic coverage and moves the ratio of the time overhead moved a step.
9. control method as claimed in claim 5, it is characterized in that, described quota is divided into two kinds: clean quota of data and dirty data quota.The request of an access net amount certificate can only use clean quota of data, and the request of accessing dirty data preferentially uses dirty data quota, can use clean quota of data when dirty data quota is inadequate.
10. control method as claimed in claim 5, it is characterized in that, α and β product is not more than 1/40, to ensure thermal stability.
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CN110209374A (en) * 2019-05-23 2019-09-06 浙江大学 A kind of multiplier and its operating method based on racetrack memory

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