Storage device with predictor engine of host turnaround time

A method of accessing data by a storage device, comprising:

• issuing a direct memory access (DMA) read request of a host memory to a host;
• estimating a host turnaround time, the host turnaround time is a time interval between when the DMA read request is issued and when an initial data packet of requested data from the host from the DMA read request arrives to the storage device;
• initializing a data-path of the storage device to transfer the requested data of the DMA read request to a device buffer of the storage device, wherein initialization of the data-path is started after issuance of the DMA read request and wherein initialization is completed at an end of the estimated host turnaround time;
• receiving the requested data from the host;
• and
• transferring the received requested data utilizing the data-path to the device buffer.

A storage device, comprising:

• a non-volatile memory;
• and
• a device controller comprising:
• a host interface;
• a data-path comprising a DMA module and a device buffer;
• a counter;
• a statistic collector;
• and
• a predictor engine means for activating the data-path proximate to receipt of data at the host interface in response to the DMA module accessing the host memory,
• the device controller operable to:
• issue a direct memory access (DMA) read request of a host memory to a host by the DMA module;
• count an actual host turnaround time of the DMA read request by the counter;
• collect one or more parameters related to the DMA read request by the statistic collector;
• estimate an estimated host turnaround time by the predictor engine means;
• initialize the data-path of the storage device to transfer the requested data of the DMA read request to the device buffer, wherein initialization of the data-path is started after issuance of the DMA read request is issued and completed at an end of the estimated host turnaround time;
• receive the requested data from the host;
• and
• transfer the received requested data utilizing the data-path to the device buffer.