Data temperature profiling by smart counter

1. A memory system, comprising:

a logical block address (LBA) space divided into a number of zones;

a counter associated with each zone, each counter suitable for incrementing a count value when a read is performed on an LBA in the zone with which the counter is associated; and

a controller suitable for:

calculating a temperature of each zone based on the count values of the counters;

sorting the zones according to the calculated temperature;

combining the zones into a number of superzones based on the sorting; and

splitting the number of superzones into the number of zones into which the LBA space was divided.

2. The memory system of claim 1 , wherein the controller is further suitable for sorting the zones in order of coldest zone to hottest zone.

3. The memory system of claim 1 , wherein the controller is further suitable for splitting the superzones pseudo-randomly.

4. The memory system of claim 1 , wherein the controller is further suitable for splitting the superzones based on a predefined number of affine permutations.

5. The memory system of claim 1 , wherein the controller is further suitable for clearing the count values of the counters after the splitting.

6. The memory system of claim 1 , wherein the number of zones is four or more.

7. A method, comprising:

dividing a logical block address (LBA) space into a number of zones;

incrementing, with a counter associated with each zone, a count value when a read is performed on an LBA in the zone with which the counter is associated;

calculating, with a controller, a temperature of each zone based on the count values of the counters;

sorting, with the controller, the zones according to the calculated temperature;

combining, with the controller, the zones into a number of superzones based on the sorting; and

splitting, with the controller, the number of superzones into the number of zones into which the LBA space was divided.

8. The method of claim 7 , wherein the zones are sorted in order of coldest zone to hottest zone.

9. The method of claim 7 , further comprising splitting the superzones pseudo-randomly.

10. The method of claim 7 , wherein the superzones are split based on a predefined number of affine permutations.

11. The method of claim 7 , further comprising clearing the count values of the counters after the splitting.

12. The method of claim 7 , wherein the number of zones is four or more.

13. A memory device, comprising:

a logical block address (LBA) space divided into a number of zones;

a counter associated with each zone, each counter configured to increment a count value when a read is performed on an LBA in the zone with which the counter is associated; and

a controller configured to:

calculate a temperature of each zone based on the count values of the counters;

sort the zones according to the calculated temperature;

combine the zones into a number of superzones based on the sorting; and

split the number of superzones into the number of zones into which the LBA space was divided.

14. The memory device of claim 13 , wherein the controller is further configured to sort the zones in order of coldest zone to hottest zone.

15. The memory device of claim 13 , wherein the controller is further configured to split the superzones pseudo-randomly.

16. The memory device of claim 13 , wherein the controller is further configured to split the superzones based on a predefined number of affine permutations.

17. The memory device of claim 13 , wherein the controller is further configured to clear the count values of the counters after the splitting.

18. The memory device of claim 13 , wherein the number of zones is four or more.