Automated latency monitoring

A data storage device comprising:

• a non-volatile memory device;
• and
• a hardware controller comprising a latency monitoring cache configured to store latency information, wherein the hardware controller is configured to:
• receive, from a host device, a command to read data from the non-volatile memory device;
• responsive to receiving the command:
• determine a time indicative of initialing a data retrieval command to retrieve data from the non-volatile memory device;
• determine a time indicative of terminating the data retrieval command;
• store, to the latency monitoring cache, a timestamp associated with the time indicative of initializing the data retrieval command and a timestamp associated with the time indicative of terminating the data retrieval command;
• and
• calculate a latency for the storage device;
• comparing the latency of the storage device to a threshold amount of time and responsive to the comparing the latency of the storage device to the threshold amount of time, and that the latency of the storage device exceeds the threshold amount of time, storing at least one operational characteristic of the storage device in a system area of the non-volatile memory of the storage device;
• responsive to the comparing the latency of the storage device to the threshold amount of time, and that the latency of the storage device does not exceed the threshold amount of time, monitoring, through the hardware controller, for an additional read command;
• and
• output the latency for the storage device with operational characteristics of the storage device to a user.

A storage device comprising:

• means for receiving, by a hardware controller of the storage device, a command to read data from a non-volatile memory device of the storage device;
• means for initializing, by firmware executing at a processor of the hardware controller, a data retrieval command to retrieve data from the non-volatile memory device;
• means for determining, by circuit logic of the hardware controller, a time indicative of when the firmware initialized the data retrieval command;
• means for determining, by the circuit logic of the hardware, a time indicative of when the data retrieval command terminated;
• means for storing, by the circuit logic, a timestamp associated with the time indicative of when the data retrieval command was initialized and a timestamp associated with the time indicative of when the data retrieval command terminated wherein the means for storing is in the hardware controller
• means for determining that the data retrieval command terminated, copying, by the hardware controller, data from the latency monitoring cache to a volatile memory device;
• means for calculating a latency of the storage device;
• means for comparing the latency of the storage device to a threshold amount of time and responsive to the comparing the latency of the storage device to the threshold amount of time, and that the latency of the storage device exceeds the threshold amount of time, storing at least one operational characteristic of the storage device in a system area of the non-volatile memory of the storage device;
• and responsive to the comparing the latency of the storage device to the threshold amount of time, and that the latency of the storage device does not exceed the threshold amount of time, monitoring, through the hardware controller, for an additional read command;
• and
• means for outputting the latency of the storage device with operational characteristics of the storage device to a user.

A method comprising:

• receiving, by a hardware controller of a storage device and from a host device, a command to write data to a non-volatile memory device of the storage device;
• responsive to receiving the command:
• initializing, by firmware executing at a processor of the hardware controller, a data storage command to store data to the non-volatile memory device;
• determining, by circuit logic of the hardware controller, a time indicative of when the firmware initialized the data storage command;
• determining, by the circuit logic, a time indicative of when the data storage command terminated;
• and
• storing, by the circuit logic and at a latency monitoring cache in the controller of the storage device, a timestamp associated with the time indicative of when the data storage command was initiated and a timestamp associated with the time indicative of when the data storage command terminated;
• responsive to determining that the data retrieval command terminated, copying, by the hardware controller, data from the latency monitoring cache to a volatile memory device;
• calculating a latency of the storage device;
• comparing the latency of the storage device to a threshold amount of time;
• responsive to the comparing the latency of the storage device to the threshold amount of time, and that the latency of the storage device exceeds the threshold amount of time, storing at least one operational characteristic of the storage device in a system area of the non-volatile memory of the storage device;
• responsive to the comparing the latency of the storage device to the threshold amount of time, and that the latency of the storage device does not exceed the threshold amount of time, monitoring, through the hardware controller, for an additional read command;
• and
• outputting the latency of the storage device with operational characteristics of the storage device to a user.