file: /proc/sys/net/core/dev_weight_rx_bias
variable: net.core.dev_weight_rx_bias
Official reference

RPS (e.g. RFS, aRFS) processing is competing with the registered NAPI poll function of the driver for the per softirq cycle netdev_budget. This parameter influences the proportion of the configured netdev_budget that is spent on RPS based packet processing during RX softirq cycles. It is further meant for making current dev_weight adaptable for asymmetric CPU needs on RX/TX side of the network stack. (see dev_weight_tx_bias) It is effective on a per CPU basis. Determination is based on dev_weight and is calculated multiplicative (dev_weight * dev_weight_rx_bias). Default: 1