A fluidic die comprising: an array of fluid actuators grouped into primitives, wherein a size of each primitive is variable; an array of actuator sensors to receive a signal indicative of a characteristic of a fluid actuator, wherein each actuator sensor is coupled to a respective fluid actuator; a fluid actuator controller to selectively activate fluid actuators via activation data; and an array of actuator evaluators, each actuator evaluator coupled to a subset of fluid actuators, to selectively evaluate an actuator characteristic of a selected fluid actuator based on: - an output of the actuator sensor paired with the selected fluid actuator; - the activation data, which is data that targets a particular fluid actuator or set of fluid actuators for actuation; - a fire signal; - a local per-actuator fire signal; and - an evaluation control signal, wherein the activation data includes actuation data and mask data; wherein the fluid actuator controller comprises: - an actuation data register comprising a respective bit for each respective fluid actuator to store actuation data that indicates fluid actuators to actuate for a set of actuation events; and - a mask register comprising a respective bit for each respective fluid actuator to store the mask data that indicates a set of fluid actuators of the array enabled for actuation for a particular actuation event of the set of actuation events; wherein the local per-actuator fire signal is the fire signal gated by the activation data to activate a particular fluid actuator; and wherein a corresponding actuator evaluator is instructed via the evaluation control signal and the local per-actuator fire signal to receive the output of the actuator sensor paired with the particular fluid actuator and to evaluate the particular fluid actuator. an array of fluid actuators grouped into primitives, wherein a size of each primitive is variable; an array of actuator sensors to receive a signal indicative of a characteristic of a fluid actuator, wherein each actuator sensor is coupled to a respective fluid actuator; a fluid actuator controller to selectively activate fluid actuators via activation data; and an array of actuator evaluators, each actuator evaluator coupled to a subset of fluid actuators, to selectively evaluate an actuator characteristic of a selected fluid actuator based on: - an output of the actuator sensor paired with the selected fluid actuator; - the activation data, which is data that targets a particular fluid actuator or set of fluid actuators for actuation; - a fire signal; - a local per-actuator fire signal; and - an evaluation control signal, - an output of the actuator sensor paired with the selected fluid actuator; - the activation data, which is data that targets a particular fluid actuator or set of fluid actuators for actuation; - a fire signal; - a local per-actuator fire signal; and - an evaluation control signal, wherein the activation data includes actuation data and mask data; wherein the fluid actuator controller comprises: - an actuation data register comprising a respective bit for each respective fluid actuator to store actuation data that indicates fluid actuators to actuate for a set of actuation events; and - a mask register comprising a respective bit for each respective fluid actuator to store the mask data that indicates a set of fluid actuators of the array enabled for actuation for a particular actuation event of the set of actuation events; - an actuation data register comprising a respective bit for each respective fluid actuator to store actuation data that indicates fluid actuators to actuate for a set of actuation events; and - a mask register comprising a respective bit for each respective fluid actuator to store the mask data that indicates a set of fluid actuators of the array enabled for actuation for a particular actuation event of the set of actuation events; wherein the local per-actuator fire signal is the fire signal gated by the activation data to activate a particular fluid actuator; and wherein a corresponding actuator evaluator is instructed via the evaluation control signal and the local per-actuator fire signal to receive the output of the actuator sensor paired with the particular fluid actuator and to evaluate the particular fluid actuator.