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Method for out-of-order mapping from snapshot market data to DDR storage space

A storage space and data technology, applied in the input/output process of data processing, electrical digital data processing, input/output to record carrier, etc., can solve problems such as inapplicable decoding methods, and achieve great attraction and delay Inexpensive, low-cost effect

Inactive Publication Date: 2021-12-07
北京中科胜芯科技有限公司
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0003] However, the above method is not applicable to the method of decoding using FPGA, and the control of its storage space is a big challenge

Method used

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  • Method for out-of-order mapping from snapshot market data to DDR storage space
  • Method for out-of-order mapping from snapshot market data to DDR storage space

Examples

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Embodiment 1

[0018] A method for out-of-order mapping of snapshot market data to DDR storage space, the following steps are performed:

[0019] 1) At the receiving end, the data input by the data source is encoded according to the field;

[0020] 2) Map the address in step 1) with the 256-bit wide address of DDR;

[0021] 3) Allocate byte enable data for each field after the mapping is completed, and sort according to the output order;

[0022] 4) According to the byte enable data, the data input by the data source is written to the corresponding position of the DDR, and the data reception is completed.

[0023] Such as figure 1 As shown, the data source field address and the DDR address have been byte-enabled after receiving the mapping relationship, and have been adjusted according to the output sequence.

[0024] The byte enable data replaces one byte with 1 bit, and DDR has a fixed 256b bit width, that is, 32 bytes require 32 bits.

[0025] In step 3), it may happen that the data o...

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Abstract

The invention relates to a method for out-of-order mapping from snapshot market information data to a DDR storage space, and belongs to the technical field of certified financial market information FPGA decoding acceleration. The method comprises the following steps of: 1) carrying out address coding on data input by a data source according to fields at a receiving end; 2) mapping the address in the step (1) and an address with 256-bit width of DDR; 3) distributing byte enabling data for each field after mapping is completed, and sorting according to an output sequence; and 4) writing the data input for the data source into the corresponding position of the DDR according to the byte enabling data to complete data receiving. According to the method, the write-in problem caused by the uncertainty of the snapshot data input sequence and the fixed bit width of the DDR is solved, more importantly, sequencing is completed by performing address coding on the fields and allocating byte enable data during write-in, and the delay of data output is reduced.

Description

technical field [0001] The invention relates to a method for out-of-order mapping of snapshot market data to DDR storage space, and belongs to the technical field of FPGA decoding acceleration of Shanghai Stock Exchange financial market data. Background technique [0002] SSE Level-2 market is a new generation of Shanghai Stock Exchange market launched by Shanghai Stock Exchange Information Network Co., Ltd. The data adopts the interface based on FIX / FAST protocol, and the market is transmitted through the private network of SSE Information Network Co., Ltd.; on the basic market Added value-added information to better meet the differentiated needs of institutional investors and professional investors for market information. When the receiving end performs decoding, the incremental data of each stock needs to be restored to new full data according to the previous full data of the corresponding stock, and the previous full data needs to be stored, and then calculated and updat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F3/06
CPCG06F3/061G06F3/0611G06F3/0638G06F3/0656G06F3/0679
Inventor 温士魁杨海钢贾一平涂开辉
Owner 北京中科胜芯科技有限公司
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