Operating method of memory system that checks stored data that is reused and generating a flag/bit signal
A data processing system includes a host processor, a processor suitable for processing a task instructed by the host processor, a memory, shared by the host processor and the processor, that is suitable for storing data processed by the host processor and the processor, respectively, and a memory controller suitable for checking whether a stored data processed by the host processor and the processor are reused, and for sorting and managing the stored data as a first data and a second data based on the check result.
1. A data processing system comprising:
a host processor;
a processor suitable for processing a task instructed by the host processor;
a memory, shared by the host processor and the processor, that is suitable for storing data processed by the host processor and the processor, respectively; and
a memory controller suitable for checking whether a stored data in the memory is reused, and for sorting and managing the stored data that is reused, as a first data for the host processor, and the stored data that is not reused, as a second data for the processor.
2. The data processing system of claim 1 , wherein the memory controller sorts the stored data that is reused within a predetermined period, as the first data, and sorts the stored data that is not reused within the predetermined period, as the second data.
3. The data processing system of claim 1 , wherein the memory controller allocates a valid bit and a dirty bit to the first data and manage the first data as cache data.
4. The data processing system of claim 1 , wherein the memory controller comprises:
a first storage unit suitable for storing an input address, requested by the host processor and the processor, as a first address;
a comparison unit suitable for comparing the input address to the first address, and for generating a flag signal according to the comparison result; and
a second storage unit suitable for storing the input address as a second address in response to the flag signal.
5. The data processing system of claim 4 , wherein the memory controller comprises:
a counting unit suitable for increasing a count value in response to the input address; and
a reset unit suitable for generating a reset signal when the count value reaches a threshold value.
6. The data processing system of claim 5 , wherein the counting unit and the first storage unit are reset in response to the reset signal.
7. The data processing system of claim 5 , wherein the threshold value corresponds to a depth of a queue of the memory controller.
8. The data processing system of claim 4 , wherein when the comparison result indicates that the input address coincides with the first address, the comparison unit increases a flag bit corresponding to the first address.
9. The data processing system of claim 8 , wherein when the flag bit is increased to a threshold bit or more, the comparison unit generates the flag signal.
10. The data processing system of claim 1 , wherein the memory is shared as a last-level cache memory of the host processor and a buffer memory of the processor.
11. The data processing system of claim 1 , wherein the memory comprises a dynamic random access memory (DRAM) having a capacity of 1 to 2 gigabytes.
12. An operating method of a memory system, comprising:
storing data processed by a host processor and a processor, respectively, in a memory shared by the host processor and the processor;
storing an input address, corresponding to a stored data in the memory, as a first address;
comparing an input address to the first address, and generating a flag signal according to the comparison result; and
storing the input address compared to the first address as a second address and allocating a valid bit and a dirty bit to the second address in response to the flag signal.
13. The operating method of claim 12 , further comprising:
increasing a count value in response to the input address; and
generating a reset signal when the increased count value reaches a threshold value.
14. The operating method of claim 13 , further comprising:
deleting the first address in response to the reset signal; and
resetting the count value to an initial value in response to the reset signal.
15. The operating method of claim 13 , wherein the threshold value corresponds to a depth of a queue of the memory system.
16. The operating method according to claim 12 , wherein the generating of the flag signal comprises:
increasing a flag bit when the comparison result indicates that the input address coincides with the first address; and
generating the flag signal when the flag bit is increased to a threshold bit or more.
17. The operating method of claim 12 , further comprising activating or deactivating the allocated valid bit and dirty bit of the second address based on the input address.
18. The operating method of claim 12 , wherein the memory system comprises a dynamic random access memory (DRAM) having a capacity of 1 to 2 gigabytes.