Quality of service control of logical devices for a memory sub-system

A system comprising:

• a memory device;
• and
• a processing device, operatively coupled with the memory device, the processing device to perform operations comprising:
• iteratively processing input/output (I/O) operations corresponding to a plurality of logical devices associated with the memory device, wherein, for each of the plurality of logical devices, the processing comprises:
• identifying, by a processing device, a current logical device;
• determining one or more I/O operations in queue for the current logical device;
• determining a number of operation credits associated with the current logical device, wherein the number of credits is based at least in part on a set of quality of service (QoS) parameters for the current logical device;
• responsive to determining that the number of operation credits satisfies a threshold condition, performing, by the processing device, the one or more I/O operations for the current logical device;
• and
• identifying a subsequent logical device of the plurality of logical devices.

A non-transitory computer-readable storage medium comprising instructions that, when executed by a processing device, cause the processing device to perform operations comprising:

• providing a plurality of physical functions at a memory device;
• presenting the plurality of physical functions to a host computing system over a peripheral component interconnect express (PCIe) interface, wherein each of the plurality of physical functions corresponds to a different virtual machine running on the host computing system;
• and
• managing input/output (TO) operations received from the host computing system and directed to the plurality of physical functions in view of a number of operation credits associated with each physical function, wherein the number of credits is based at least in part on a set of quality of service (QoS) parameters for a corresponding physical function.