A method for adaptively matching nvme SSD reading speed and fiber interface speed
A technology of adaptive matching and optical fiber interface, which is applied in the direction of instruments, electrical digital data processing, etc., can solve the problem of occupying too much data cache resources, achieve the effect of reducing the demand for cache resources and saving the usage of BlockRam cache resources
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specific Embodiment approach 1
[0033] Specific implementation mode one: refer to figure 1 Specifically illustrate this embodiment, in this embodiment, a kind of NVMe SSD reading speed and optical fiber interface speed self-adaptive matching method, comprise the following steps: first FPGA receives the data packet of reading data that returns from NVMe SSD, then RxReady signal is pulled low for five clock cycles.
[0034] When an NVMe storage device executes a read command, the speed of the fiber data interface is slower than that of the NVMe SSD. In order to match the speed of the NVMe SSD data read with the speed of the fiber data interface, the data read speed of the NVMe SSD must be reduced .
[0035] A common method is to control the read data speed of NVMe SSD by reducing the size of each NVMe read command and inserting a waiting interval between adjacent read commands. This method is limited by the logical block size (512Byte or 4KByte) of NVMe SSD, and can only control the average speed at which NV...
specific Embodiment approach 2
[0041] Embodiment 2: This embodiment is a further description of the adaptive matching method for NVMe SSD reading speed and fiber interface speed described in Embodiment 1. The difference between this embodiment and Embodiment 1 is that the RxReady The signal is pulled low by the state machine.
specific Embodiment approach 3
[0042] Embodiment 3: This embodiment is a further description of the method for adaptively matching the reading speed of an NVMe SSD and the speed of an optical fiber interface described in Embodiment 2. The difference between this embodiment and Embodiment 2 is the state The state of the machine includes: idle state, parsing packet header state, waiting state and RxReady signal control state.
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