Apparatuses and methods for an operating system cache in a solid state device
The present disclosure includes apparatuses and methods for an operating system cache in a solid state device (SSD). An example apparatus includes the SSD, which includes an In-SSD volatile memory, a non-volatile memory, and an interconnect that couples the non-volatile memory to the In-SSD volatile memory. The SSD also includes a controller configured to receive a request for performance of an operation and to direct that a result of the performance of the operation is accessible in the In-SSD volatile memory as an In-SSD main memory operating system cache.
1. An apparatus, comprising:
a solid state device (SSD), wherein the SSD comprises:
an In-SSD volatile memory;
a non-volatile memory;
an interconnect that couples the non-volatile memory to the In-SSD volatile memory; and
a controller configured to:
receive a request for performance of an operation;
direct that a requested block of data be moved from a block address in the non-volatile memory to an In-SSD main memory (MM) operating system cache in the In-SSD volatile memory;
direct that a result of the performance of the operation is accessible in the In-SSD volatile memory as the In-SSD MM operating system cache;
notify a device driver, associated with an operating system, that the requested block of data is moved from the non-volatile memory to the In-SSD MM operating system cache in the In-SSD volatile memory; and
notify the operating system that the performance of the operation is completed.
2. The apparatus of claim 1 , wherein:
the request is received from a device driver; and
the device driver is associated with an operating system.
3. The apparatus of claim 1 , wherein:
the request comprises a block address for a block of data stored by the non-volatile memory; and
a device driver sends the request to the controller.
4. The apparatus of claim 1 , wherein the controller is further configured to selectably move the result of the operation from the In-SSD MM operating system cache of the In-SSD volatile memory to a host system.
5. The apparatus of claim 4 , wherein to selectably move the result of the operation comprises to select between:
movement of the result for storage in a cache of the host system; and
movement of the result to a cache internal to a processing resource of the host system, without being stored by the cache, to enable performance of a particular operation directed by the operating system.
6. The apparatus of claim 1 , wherein the performance of the operation comprises:
movement of data stored by the non-volatile memory to the In-SSD volatile memory; and
storage of the data in the In-SSD MM operating system cache.
7. The apparatus of claim 1 , wherein the apparatus further comprises:
an operating system configured as part of a host system, the host system comprising:
a central processing unit (CPU);
a host MM including a host volatile memory; and
an In-host MM operating system cache as part of the host volatile memory.
8. A method, comprising:
operating a solid state device (SSD), wherein the SSD comprises a controller that is configured to perform:
receiving a request for performance of an operation;
directing that a requested block of data be moved from a block address in a non-volatile memory to an In-SSD main memory (MM) operating system cache in an In-SSD volatile memory, wherein the data is moved using an interconnect that couples the non-volatile memory to the In-SSD volatile memory;
directing that a result of the performance of the operation is accessible in the In-SSD volatile memory as an In-SSD MM operating system cache;
notifying a device driver, associated with an operating system, that the requested block of data is moved from the non-volatile memory to the In-SSD MM operating system cache in the In-SSD volatile memory; and
notifying the operating system that the performance of the operation is completed.
9. The method of claim 8 , further comprising receiving the request from a device driver that is associated with an operating system.
10. The method of claim 8 , further comprising:
including in the request a block address for a block of data stored by the non-volatile memory; and
sending, by a device driver, the request to the controller.
11. The method of claim 8 , wherein the controller is further configured to perform selectably moving the result of the operation from the In-SSD MM operating system cache of the In-SSD volatile memory to a host system.
12. The method of claim 11 , wherein selectably moving the result of the operation comprises selecting between:
movement of the result for storage in a cache of the host system; and
movement of the result to a cache internal to a processing resource of the host system, without being stored by the cache, to enable performance of a particular operation directed by the operating system.
13. The method of claim 8 , wherein the performance of the operation comprises:
moving data stored by the non-volatile memory to the In-SSD volatile memory; and
storing the data in the In-SSD MM operating system cache.
14. The method of claim 8 , wherein:
operating the SSD further comprises using an operating system that is part of a host system, wherein the host system comprises:
a central processing unit (CPU);
a host MM including a host volatile memory; and
an In-host MM operating system cache as part of the host volatile memory.